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authorAvi Kivity <avi@redhat.com>2010-04-19 12:52:53 +0300
committerAvi Kivity <avi@redhat.com>2010-05-17 12:17:58 +0300
commit9beeaa2d689842f7760aa16c512e6bb8182d38b6 (patch)
tree62cea0772127c4b1c0b476e46dec6830d36809c1 /arch
parent3246af0ece6c61689847417977733f0b12dc4b6f (diff)
parenta1645ce12adb6c9cc9e19d7695466204e3f017fe (diff)
downloadop-kernel-dev-9beeaa2d689842f7760aa16c512e6bb8182d38b6.zip
op-kernel-dev-9beeaa2d689842f7760aa16c512e6bb8182d38b6.tar.gz
Merge branch 'perf'
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/Kconfig9
-rw-r--r--arch/x86/Kconfig3
-rw-r--r--arch/x86/Kconfig.cpu20
-rw-r--r--arch/x86/Kconfig.debug9
-rw-r--r--arch/x86/include/asm/apic.h13
-rw-r--r--arch/x86/include/asm/ds.h302
-rw-r--r--arch/x86/include/asm/insn.h2
-rw-r--r--arch/x86/include/asm/kprobes.h2
-rw-r--r--arch/x86/include/asm/msr-index.h15
-rw-r--r--arch/x86/include/asm/perf_event.h76
-rw-r--r--arch/x86/include/asm/perf_event_p4.h794
-rw-r--r--arch/x86/include/asm/processor.h35
-rw-r--r--arch/x86/include/asm/ptrace-abi.h57
-rw-r--r--arch/x86/include/asm/ptrace.h6
-rw-r--r--arch/x86/include/asm/thread_info.h8
-rw-r--r--arch/x86/kernel/Makefile2
-rw-r--r--arch/x86/kernel/cpu/intel.c2
-rw-r--r--arch/x86/kernel/cpu/perf_event.c552
-rw-r--r--arch/x86/kernel/cpu/perf_event_amd.c46
-rw-r--r--arch/x86/kernel/cpu/perf_event_intel.c354
-rw-r--r--arch/x86/kernel/cpu/perf_event_intel_ds.c664
-rw-r--r--arch/x86/kernel/cpu/perf_event_intel_lbr.c218
-rw-r--r--arch/x86/kernel/cpu/perf_event_p4.c834
-rw-r--r--arch/x86/kernel/cpu/perf_event_p6.c31
-rw-r--r--arch/x86/kernel/ds.c1437
-rw-r--r--arch/x86/kernel/ds_selftest.c408
-rw-r--r--arch/x86/kernel/ds_selftest.h15
-rw-r--r--arch/x86/kernel/dumpstack.c5
-rw-r--r--arch/x86/kernel/kprobes.c16
-rw-r--r--arch/x86/kernel/process.c18
-rw-r--r--arch/x86/kernel/process_32.c8
-rw-r--r--arch/x86/kernel/process_64.c8
-rw-r--r--arch/x86/kernel/ptrace.c382
-rw-r--r--arch/x86/kernel/step.c46
-rw-r--r--arch/x86/kernel/traps.c4
-rw-r--r--arch/x86/kvm/vmx.c5
-rw-r--r--arch/x86/kvm/x86.c46
-rw-r--r--arch/x86/kvm/x86.h3
-rw-r--r--arch/x86/lib/Makefile2
-rw-r--r--arch/x86/oprofile/op_model_ppro.c4
40 files changed, 3189 insertions, 3272 deletions
diff --git a/arch/Kconfig b/arch/Kconfig
index e5eb133..f06010f 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -42,15 +42,10 @@ config KPROBES
If in doubt, say "N".
config OPTPROBES
- bool "Kprobes jump optimization support (EXPERIMENTAL)"
- default y
- depends on KPROBES
+ def_bool y
+ depends on KPROBES && HAVE_OPTPROBES
depends on !PREEMPT
- depends on HAVE_OPTPROBES
select KALLSYMS_ALL
- help
- This option will allow kprobes to optimize breakpoint to
- a jump for reducing its overhead.
config HAVE_EFFICIENT_UNALIGNED_ACCESS
bool
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 9458685..97a95df 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -58,6 +58,9 @@ config X86
select HAVE_ARCH_KMEMCHECK
select HAVE_USER_RETURN_NOTIFIER
+config INSTRUCTION_DECODER
+ def_bool (KPROBES || PERF_EVENTS)
+
config OUTPUT_FORMAT
string
default "elf32-i386" if X86_32
diff --git a/arch/x86/Kconfig.cpu b/arch/x86/Kconfig.cpu
index a198293..918fbb1 100644
--- a/arch/x86/Kconfig.cpu
+++ b/arch/x86/Kconfig.cpu
@@ -502,23 +502,3 @@ config CPU_SUP_UMC_32
CPU might render the kernel unbootable.
If unsure, say N.
-
-config X86_DS
- def_bool X86_PTRACE_BTS
- depends on X86_DEBUGCTLMSR
- select HAVE_HW_BRANCH_TRACER
-
-config X86_PTRACE_BTS
- bool "Branch Trace Store"
- default y
- depends on X86_DEBUGCTLMSR
- depends on BROKEN
- ---help---
- This adds a ptrace interface to the hardware's branch trace store.
-
- Debuggers may use it to collect an execution trace of the debugged
- application in order to answer the question 'how did I get here?'.
- Debuggers may trace user mode as well as kernel mode.
-
- Say Y unless there is no application development on this machine
- and you want to save a small amount of code size.
diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug
index bc01e3e..bd58c8a 100644
--- a/arch/x86/Kconfig.debug
+++ b/arch/x86/Kconfig.debug
@@ -174,15 +174,6 @@ config IOMMU_LEAK
Add a simple leak tracer to the IOMMU code. This is useful when you
are debugging a buggy device driver that leaks IOMMU mappings.
-config X86_DS_SELFTEST
- bool "DS selftest"
- default y
- depends on DEBUG_KERNEL
- depends on X86_DS
- ---help---
- Perform Debug Store selftests at boot time.
- If in doubt, say "N".
-
config HAVE_MMIOTRACE_SUPPORT
def_bool y
diff --git a/arch/x86/include/asm/apic.h b/arch/x86/include/asm/apic.h
index b4ac2cd..1fa03e0 100644
--- a/arch/x86/include/asm/apic.h
+++ b/arch/x86/include/asm/apic.h
@@ -373,6 +373,7 @@ extern atomic_t init_deasserted;
extern int wakeup_secondary_cpu_via_nmi(int apicid, unsigned long start_eip);
#endif
+#ifdef CONFIG_X86_LOCAL_APIC
static inline u32 apic_read(u32 reg)
{
return apic->read(reg);
@@ -403,10 +404,19 @@ static inline u32 safe_apic_wait_icr_idle(void)
return apic->safe_wait_icr_idle();
}
+#else /* CONFIG_X86_LOCAL_APIC */
+
+static inline u32 apic_read(u32 reg) { return 0; }
+static inline void apic_write(u32 reg, u32 val) { }
+static inline u64 apic_icr_read(void) { return 0; }
+static inline void apic_icr_write(u32 low, u32 high) { }
+static inline void apic_wait_icr_idle(void) { }
+static inline u32 safe_apic_wait_icr_idle(void) { return 0; }
+
+#endif /* CONFIG_X86_LOCAL_APIC */
static inline void ack_APIC_irq(void)
{
-#ifdef CONFIG_X86_LOCAL_APIC
/*
* ack_APIC_irq() actually gets compiled as a single instruction
* ... yummie.
@@ -414,7 +424,6 @@ static inline void ack_APIC_irq(void)
/* Docs say use 0 for future compatibility */
apic_write(APIC_EOI, 0);
-#endif
}
static inline unsigned default_get_apic_id(unsigned long x)
diff --git a/arch/x86/include/asm/ds.h b/arch/x86/include/asm/ds.h
deleted file mode 100644
index 70dac19..0000000
--- a/arch/x86/include/asm/ds.h
+++ /dev/null
@@ -1,302 +0,0 @@
-/*
- * Debug Store (DS) support
- *
- * This provides a low-level interface to the hardware's Debug Store
- * feature that is used for branch trace store (BTS) and
- * precise-event based sampling (PEBS).
- *
- * It manages:
- * - DS and BTS hardware configuration
- * - buffer overflow handling (to be done)
- * - buffer access
- *
- * It does not do:
- * - security checking (is the caller allowed to trace the task)
- * - buffer allocation (memory accounting)
- *
- *
- * Copyright (C) 2007-2009 Intel Corporation.
- * Markus Metzger <markus.t.metzger@intel.com>, 2007-2009
- */
-
-#ifndef _ASM_X86_DS_H
-#define _ASM_X86_DS_H
-
-
-#include <linux/types.h>
-#include <linux/init.h>
-#include <linux/err.h>
-
-
-#ifdef CONFIG_X86_DS
-
-struct task_struct;
-struct ds_context;
-struct ds_tracer;
-struct bts_tracer;
-struct pebs_tracer;
-
-typedef void (*bts_ovfl_callback_t)(struct bts_tracer *);
-typedef void (*pebs_ovfl_callback_t)(struct pebs_tracer *);
-
-
-/*
- * A list of features plus corresponding macros to talk about them in
- * the ds_request function's flags parameter.
- *
- * We use the enum to index an array of corresponding control bits;
- * we use the macro to index a flags bit-vector.
- */
-enum ds_feature {
- dsf_bts = 0,
- dsf_bts_kernel,
-#define BTS_KERNEL (1 << dsf_bts_kernel)
- /* trace kernel-mode branches */
-
- dsf_bts_user,
-#define BTS_USER (1 << dsf_bts_user)
- /* trace user-mode branches */
-
- dsf_bts_overflow,
- dsf_bts_max,
- dsf_pebs = dsf_bts_max,
-
- dsf_pebs_max,
- dsf_ctl_max = dsf_pebs_max,
- dsf_bts_timestamps = dsf_ctl_max,
-#define BTS_TIMESTAMPS (1 << dsf_bts_timestamps)
- /* add timestamps into BTS trace */
-
-#define BTS_USER_FLAGS (BTS_KERNEL | BTS_USER | BTS_TIMESTAMPS)
-};
-
-
-/*
- * Request BTS or PEBS
- *
- * Due to alignement constraints, the actual buffer may be slightly
- * smaller than the requested or provided buffer.
- *
- * Returns a pointer to a tracer structure on success, or
- * ERR_PTR(errcode) on failure.
- *
- * The interrupt threshold is independent from the overflow callback
- * to allow users to use their own overflow interrupt handling mechanism.
- *
- * The function might sleep.
- *
- * task: the task to request recording for
- * cpu: the cpu to request recording for
- * base: the base pointer for the (non-pageable) buffer;
- * size: the size of the provided buffer in bytes
- * ovfl: pointer to a function to be called on buffer overflow;
- * NULL if cyclic buffer requested
- * th: the interrupt threshold in records from the end of the buffer;
- * -1 if no interrupt threshold is requested.
- * flags: a bit-mask of the above flags
- */
-extern struct bts_tracer *ds_request_bts_task(struct task_struct *task,
- void *base, size_t size,
- bts_ovfl_callback_t ovfl,
- size_t th, unsigned int flags);
-extern struct bts_tracer *ds_request_bts_cpu(int cpu, void *base, size_t size,
- bts_ovfl_callback_t ovfl,
- size_t th, unsigned int flags);
-extern struct pebs_tracer *ds_request_pebs_task(struct task_struct *task,
- void *base, size_t size,
- pebs_ovfl_callback_t ovfl,
- size_t th, unsigned int flags);
-extern struct pebs_tracer *ds_request_pebs_cpu(int cpu,
- void *base, size_t size,
- pebs_ovfl_callback_t ovfl,
- size_t th, unsigned int flags);
-
-/*
- * Release BTS or PEBS resources
- * Suspend and resume BTS or PEBS tracing
- *
- * Must be called with irq's enabled.
- *
- * tracer: the tracer handle returned from ds_request_~()
- */
-extern void ds_release_bts(struct bts_tracer *tracer);
-extern void ds_suspend_bts(struct bts_tracer *tracer);
-extern void ds_resume_bts(struct bts_tracer *tracer);
-extern void ds_release_pebs(struct pebs_tracer *tracer);
-extern void ds_suspend_pebs(struct pebs_tracer *tracer);
-extern void ds_resume_pebs(struct pebs_tracer *tracer);
-
-/*
- * Release BTS or PEBS resources
- * Suspend and resume BTS or PEBS tracing
- *
- * Cpu tracers must call this on the traced cpu.
- * Task tracers must call ds_release_~_noirq() for themselves.
- *
- * May be called with irq's disabled.
- *
- * Returns 0 if successful;
- * -EPERM if the cpu tracer does not trace the current cpu.
- * -EPERM if the task tracer does not trace itself.
- *
- * tracer: the tracer handle returned from ds_request_~()
- */
-extern int ds_release_bts_noirq(struct bts_tracer *tracer);
-extern int ds_suspend_bts_noirq(struct bts_tracer *tracer);
-extern int ds_resume_bts_noirq(struct bts_tracer *tracer);
-extern int ds_release_pebs_noirq(struct pebs_tracer *tracer);
-extern int ds_suspend_pebs_noirq(struct pebs_tracer *tracer);
-extern int ds_resume_pebs_noirq(struct pebs_tracer *tracer);
-
-
-/*
- * The raw DS buffer state as it is used for BTS and PEBS recording.
- *
- * This is the low-level, arch-dependent interface for working
- * directly on the raw trace data.
- */
-struct ds_trace {
- /* the number of bts/pebs records */
- size_t n;
- /* the size of a bts/pebs record in bytes */
- size_t size;
- /* pointers into the raw buffer:
- - to the first entry */
- void *begin;
- /* - one beyond the last entry */
- void *end;
- /* - one beyond the newest entry */
- void *top;
- /* - the interrupt threshold */
- void *ith;
- /* flags given on ds_request() */
- unsigned int flags;
-};
-
-/*
- * An arch-independent view on branch trace data.
- */
-enum bts_qualifier {
- bts_invalid,
-#define BTS_INVALID bts_invalid
-
- bts_branch,
-#define BTS_BRANCH bts_branch
-
- bts_task_arrives,
-#define BTS_TASK_ARRIVES bts_task_arrives
-
- bts_task_departs,
-#define BTS_TASK_DEPARTS bts_task_departs
-
- bts_qual_bit_size = 4,
- bts_qual_max = (1 << bts_qual_bit_size),
-};
-
-struct bts_struct {
- __u64 qualifier;
- union {
- /* BTS_BRANCH */
- struct {
- __u64 from;
- __u64 to;
- } lbr;
- /* BTS_TASK_ARRIVES or BTS_TASK_DEPARTS */
- struct {
- __u64 clock;
- pid_t pid;
- } event;
- } variant;
-};
-
-
-/*
- * The BTS state.
- *
- * This gives access to the raw DS state and adds functions to provide
- * an arch-independent view of the BTS data.
- */
-struct bts_trace {
- struct ds_trace ds;
-
- int (*read)(struct bts_tracer *tracer, const void *at,
- struct bts_struct *out);
- int (*write)(struct bts_tracer *tracer, const struct bts_struct *in);
-};
-
-
-/*
- * The PEBS state.
- *
- * This gives access to the raw DS state and the PEBS-specific counter
- * reset value.
- */
-struct pebs_trace {
- struct ds_trace ds;
-
- /* the number of valid counters in the below array */
- unsigned int counters;
-
-#define MAX_PEBS_COUNTERS 4
- /* the counter reset value */
- unsigned long long counter_reset[MAX_PEBS_COUNTERS];
-};
-
-
-/*
- * Read the BTS or PEBS trace.
- *
- * Returns a view on the trace collected for the parameter tracer.
- *
- * The view remains valid as long as the traced task is not running or
- * the tracer is suspended.
- * Writes into the trace buffer are not reflected.
- *
- * tracer: the tracer handle returned from ds_request_~()
- */
-extern const struct bts_trace *ds_read_bts(struct bts_tracer *tracer);
-extern const struct pebs_trace *ds_read_pebs(struct pebs_tracer *tracer);
-
-
-/*
- * Reset the write pointer of the BTS/PEBS buffer.
- *
- * Returns 0 on success; -Eerrno on error
- *
- * tracer: the tracer handle returned from ds_request_~()
- */
-extern int ds_reset_bts(struct bts_tracer *tracer);
-extern int ds_reset_pebs(struct pebs_tracer *tracer);
-
-/*
- * Set the PEBS counter reset value.
- *
- * Returns 0 on success; -Eerrno on error
- *
- * tracer: the tracer handle returned from ds_request_pebs()
- * counter: the index of the counter
- * value: the new counter reset value
- */
-extern int ds_set_pebs_reset(struct pebs_tracer *tracer,
- unsigned int counter, u64 value);
-
-/*
- * Initialization
- */
-struct cpuinfo_x86;
-extern void __cpuinit ds_init_intel(struct cpuinfo_x86 *);
-
-/*
- * Context switch work
- */
-extern void ds_switch_to(struct task_struct *prev, struct task_struct *next);
-
-#else /* CONFIG_X86_DS */
-
-struct cpuinfo_x86;
-static inline void __cpuinit ds_init_intel(struct cpuinfo_x86 *ignored) {}
-static inline void ds_switch_to(struct task_struct *prev,
- struct task_struct *next) {}
-
-#endif /* CONFIG_X86_DS */
-#endif /* _ASM_X86_DS_H */
diff --git a/arch/x86/include/asm/insn.h b/arch/x86/include/asm/insn.h
index 96c2e0a..88c765e 100644
--- a/arch/x86/include/asm/insn.h
+++ b/arch/x86/include/asm/insn.h
@@ -68,6 +68,8 @@ struct insn {
const insn_byte_t *next_byte;
};
+#define MAX_INSN_SIZE 16
+
#define X86_MODRM_MOD(modrm) (((modrm) & 0xc0) >> 6)
#define X86_MODRM_REG(modrm) (((modrm) & 0x38) >> 3)
#define X86_MODRM_RM(modrm) ((modrm) & 0x07)
diff --git a/arch/x86/include/asm/kprobes.h b/arch/x86/include/asm/kprobes.h
index 4ffa345..5478825 100644
--- a/arch/x86/include/asm/kprobes.h
+++ b/arch/x86/include/asm/kprobes.h
@@ -24,6 +24,7 @@
#include <linux/types.h>
#include <linux/ptrace.h>
#include <linux/percpu.h>
+#include <asm/insn.h>
#define __ARCH_WANT_KPROBES_INSN_SLOT
@@ -36,7 +37,6 @@ typedef u8 kprobe_opcode_t;
#define RELATIVEJUMP_SIZE 5
#define RELATIVECALL_OPCODE 0xe8
#define RELATIVE_ADDR_SIZE 4
-#define MAX_INSN_SIZE 16
#define MAX_STACK_SIZE 64
#define MIN_STACK_SIZE(ADDR) \
(((MAX_STACK_SIZE) < (((unsigned long)current_thread_info()) + \
diff --git a/arch/x86/include/asm/msr-index.h b/arch/x86/include/asm/msr-index.h
index 4604e6a..bc473ac 100644
--- a/arch/x86/include/asm/msr-index.h
+++ b/arch/x86/include/asm/msr-index.h
@@ -71,11 +71,14 @@
#define MSR_IA32_LASTINTTOIP 0x000001de
/* DEBUGCTLMSR bits (others vary by model): */
-#define _DEBUGCTLMSR_LBR 0 /* last branch recording */
-#define _DEBUGCTLMSR_BTF 1 /* single-step on branches */
-
-#define DEBUGCTLMSR_LBR (1UL << _DEBUGCTLMSR_LBR)
-#define DEBUGCTLMSR_BTF (1UL << _DEBUGCTLMSR_BTF)
+#define DEBUGCTLMSR_LBR (1UL << 0) /* last branch recording */
+#define DEBUGCTLMSR_BTF (1UL << 1) /* single-step on branches */
+#define DEBUGCTLMSR_TR (1UL << 6)
+#define DEBUGCTLMSR_BTS (1UL << 7)
+#define DEBUGCTLMSR_BTINT (1UL << 8)
+#define DEBUGCTLMSR_BTS_OFF_OS (1UL << 9)
+#define DEBUGCTLMSR_BTS_OFF_USR (1UL << 10)
+#define DEBUGCTLMSR_FREEZE_LBRS_ON_PMI (1UL << 11)
#define MSR_IA32_MC0_CTL 0x00000400
#define MSR_IA32_MC0_STATUS 0x00000401
@@ -359,6 +362,8 @@
#define MSR_P4_U2L_ESCR0 0x000003b0
#define MSR_P4_U2L_ESCR1 0x000003b1
+#define MSR_P4_PEBS_MATRIX_VERT 0x000003f2
+
/* Intel Core-based CPU performance counters */
#define MSR_CORE_PERF_FIXED_CTR0 0x00000309
#define MSR_CORE_PERF_FIXED_CTR1 0x0000030a
diff --git a/arch/x86/include/asm/perf_event.h b/arch/x86/include/asm/perf_event.h
index db6109a..254883d 100644
--- a/arch/x86/include/asm/perf_event.h
+++ b/arch/x86/include/asm/perf_event.h
@@ -5,7 +5,7 @@
* Performance event hw details:
*/
-#define X86_PMC_MAX_GENERIC 8
+#define X86_PMC_MAX_GENERIC 32
#define X86_PMC_MAX_FIXED 3
#define X86_PMC_IDX_GENERIC 0
@@ -18,39 +18,31 @@
#define MSR_ARCH_PERFMON_EVENTSEL0 0x186
#define MSR_ARCH_PERFMON_EVENTSEL1 0x187
-#define ARCH_PERFMON_EVENTSEL_ENABLE (1 << 22)
-#define ARCH_PERFMON_EVENTSEL_ANY (1 << 21)
-#define ARCH_PERFMON_EVENTSEL_INT (1 << 20)
-#define ARCH_PERFMON_EVENTSEL_OS (1 << 17)
-#define ARCH_PERFMON_EVENTSEL_USR (1 << 16)
-
-/*
- * Includes eventsel and unit mask as well:
- */
-
-
-#define INTEL_ARCH_EVTSEL_MASK 0x000000FFULL
-#define INTEL_ARCH_UNIT_MASK 0x0000FF00ULL
-#define INTEL_ARCH_EDGE_MASK 0x00040000ULL
-#define INTEL_ARCH_INV_MASK 0x00800000ULL
-#define INTEL_ARCH_CNT_MASK 0xFF000000ULL
-#define INTEL_ARCH_EVENT_MASK (INTEL_ARCH_UNIT_MASK|INTEL_ARCH_EVTSEL_MASK)
-
-/*
- * filter mask to validate fixed counter events.
- * the following filters disqualify for fixed counters:
- * - inv
- * - edge
- * - cnt-mask
- * The other filters are supported by fixed counters.
- * The any-thread option is supported starting with v3.
- */
-#define INTEL_ARCH_FIXED_MASK \
- (INTEL_ARCH_CNT_MASK| \
- INTEL_ARCH_INV_MASK| \
- INTEL_ARCH_EDGE_MASK|\
- INTEL_ARCH_UNIT_MASK|\
- INTEL_ARCH_EVENT_MASK)
+#define ARCH_PERFMON_EVENTSEL_EVENT 0x000000FFULL
+#define ARCH_PERFMON_EVENTSEL_UMASK 0x0000FF00ULL
+#define ARCH_PERFMON_EVENTSEL_USR (1ULL << 16)
+#define ARCH_PERFMON_EVENTSEL_OS (1ULL << 17)
+#define ARCH_PERFMON_EVENTSEL_EDGE (1ULL << 18)
+#define ARCH_PERFMON_EVENTSEL_INT (1ULL << 20)
+#define ARCH_PERFMON_EVENTSEL_ANY (1ULL << 21)
+#define ARCH_PERFMON_EVENTSEL_ENABLE (1ULL << 22)
+#define ARCH_PERFMON_EVENTSEL_INV (1ULL << 23)
+#define ARCH_PERFMON_EVENTSEL_CMASK 0xFF000000ULL
+
+#define AMD64_EVENTSEL_EVENT \
+ (ARCH_PERFMON_EVENTSEL_EVENT | (0x0FULL << 32))
+#define INTEL_ARCH_EVENT_MASK \
+ (ARCH_PERFMON_EVENTSEL_UMASK | ARCH_PERFMON_EVENTSEL_EVENT)
+
+#define X86_RAW_EVENT_MASK \
+ (ARCH_PERFMON_EVENTSEL_EVENT | \
+ ARCH_PERFMON_EVENTSEL_UMASK | \
+ ARCH_PERFMON_EVENTSEL_EDGE | \
+ ARCH_PERFMON_EVENTSEL_INV | \
+ ARCH_PERFMON_EVENTSEL_CMASK)
+#define AMD64_RAW_EVENT_MASK \
+ (X86_RAW_EVENT_MASK | \
+ AMD64_EVENTSEL_EVENT)
#define ARCH_PERFMON_UNHALTED_CORE_CYCLES_SEL 0x3c
#define ARCH_PERFMON_UNHALTED_CORE_CYCLES_UMASK (0x00 << 8)
@@ -67,7 +59,7 @@
union cpuid10_eax {
struct {
unsigned int version_id:8;
- unsigned int num_events:8;
+ unsigned int num_counters:8;
unsigned int bit_width:8;
unsigned int mask_length:8;
} split;
@@ -76,7 +68,7 @@ union cpuid10_eax {
union cpuid10_edx {
struct {
- unsigned int num_events_fixed:4;
+ unsigned int num_counters_fixed:4;
unsigned int reserved:28;
} split;
unsigned int full;
@@ -136,6 +128,18 @@ extern void perf_events_lapic_init(void);
#define PERF_EVENT_INDEX_OFFSET 0
+/*
+ * Abuse bit 3 of the cpu eflags register to indicate proper PEBS IP fixups.
+ * This flag is otherwise unused and ABI specified to be 0, so nobody should
+ * care what we do with it.
+ */
+#define PERF_EFLAGS_EXACT (1UL << 3)
+
+struct pt_regs;
+extern unsigned long perf_instruction_pointer(struct pt_regs *regs);
+extern unsigned long perf_misc_flags(struct pt_regs *regs);
+#define perf_misc_flags(regs) perf_misc_flags(regs)
+
#else
static inline void init_hw_perf_events(void) { }
static inline void perf_events_lapic_init(void) { }
diff --git a/arch/x86/include/asm/perf_event_p4.h b/arch/x86/include/asm/perf_event_p4.h
new file mode 100644
index 0000000..b05400a
--- /dev/null
+++ b/arch/x86/include/asm/perf_event_p4.h
@@ -0,0 +1,794 @@
+/*
+ * Netburst Perfomance Events (P4, old Xeon)
+ */
+
+#ifndef PERF_EVENT_P4_H
+#define PERF_EVENT_P4_H
+
+#include <linux/cpu.h>
+#include <linux/bitops.h>
+
+/*
+ * NetBurst has perfomance MSRs shared between
+ * threads if HT is turned on, ie for both logical
+ * processors (mem: in turn in Atom with HT support
+ * perf-MSRs are not shared and every thread has its
+ * own perf-MSRs set)
+ */
+#define ARCH_P4_TOTAL_ESCR (46)
+#define ARCH_P4_RESERVED_ESCR (2) /* IQ_ESCR(0,1) not always present */
+#define ARCH_P4_MAX_ESCR (ARCH_P4_TOTAL_ESCR - ARCH_P4_RESERVED_ESCR)
+#define ARCH_P4_MAX_CCCR (18)
+#define ARCH_P4_MAX_COUNTER (ARCH_P4_MAX_CCCR / 2)
+
+#define P4_ESCR_EVENT_MASK 0x7e000000U
+#define P4_ESCR_EVENT_SHIFT 25
+#define P4_ESCR_EVENTMASK_MASK 0x01fffe00U
+#define P4_ESCR_EVENTMASK_SHIFT 9
+#define P4_ESCR_TAG_MASK 0x000001e0U
+#define P4_ESCR_TAG_SHIFT 5
+#define P4_ESCR_TAG_ENABLE 0x00000010U
+#define P4_ESCR_T0_OS 0x00000008U
+#define P4_ESCR_T0_USR 0x00000004U
+#define P4_ESCR_T1_OS 0x00000002U
+#define P4_ESCR_T1_USR 0x00000001U
+
+#define P4_ESCR_EVENT(v) ((v) << P4_ESCR_EVENT_SHIFT)
+#define P4_ESCR_EMASK(v) ((v) << P4_ESCR_EVENTMASK_SHIFT)
+#define P4_ESCR_TAG(v) ((v) << P4_ESCR_TAG_SHIFT)
+
+/* Non HT mask */
+#define P4_ESCR_MASK \
+ (P4_ESCR_EVENT_MASK | \
+ P4_ESCR_EVENTMASK_MASK | \
+ P4_ESCR_TAG_MASK | \
+ P4_ESCR_TAG_ENABLE | \
+ P4_ESCR_T0_OS | \
+ P4_ESCR_T0_USR)
+
+/* HT mask */
+#define P4_ESCR_MASK_HT \
+ (P4_ESCR_MASK | P4_ESCR_T1_OS | P4_ESCR_T1_USR)
+
+#define P4_CCCR_OVF 0x80000000U
+#define P4_CCCR_CASCADE 0x40000000U
+#define P4_CCCR_OVF_PMI_T0 0x04000000U
+#define P4_CCCR_OVF_PMI_T1 0x08000000U
+#define P4_CCCR_FORCE_OVF 0x02000000U
+#define P4_CCCR_EDGE 0x01000000U
+#define P4_CCCR_THRESHOLD_MASK 0x00f00000U
+#define P4_CCCR_THRESHOLD_SHIFT 20
+#define P4_CCCR_COMPLEMENT 0x00080000U
+#define P4_CCCR_COMPARE 0x00040000U
+#define P4_CCCR_ESCR_SELECT_MASK 0x0000e000U
+#define P4_CCCR_ESCR_SELECT_SHIFT 13
+#define P4_CCCR_ENABLE 0x00001000U
+#define P4_CCCR_THREAD_SINGLE 0x00010000U
+#define P4_CCCR_THREAD_BOTH 0x00020000U
+#define P4_CCCR_THREAD_ANY 0x00030000U
+#define P4_CCCR_RESERVED 0x00000fffU
+
+#define P4_CCCR_THRESHOLD(v) ((v) << P4_CCCR_THRESHOLD_SHIFT)
+#define P4_CCCR_ESEL(v) ((v) << P4_CCCR_ESCR_SELECT_SHIFT)
+
+/* Custom bits in reerved CCCR area */
+#define P4_CCCR_CACHE_OPS_MASK 0x0000003fU
+
+
+/* Non HT mask */
+#define P4_CCCR_MASK \
+ (P4_CCCR_OVF | \
+ P4_CCCR_CASCADE | \
+ P4_CCCR_OVF_PMI_T0 | \
+ P4_CCCR_FORCE_OVF | \
+ P4_CCCR_EDGE | \
+ P4_CCCR_THRESHOLD_MASK | \
+ P4_CCCR_COMPLEMENT | \
+ P4_CCCR_COMPARE | \
+ P4_CCCR_ESCR_SELECT_MASK | \
+ P4_CCCR_ENABLE)
+
+/* HT mask */
+#define P4_CCCR_MASK_HT (P4_CCCR_MASK | P4_CCCR_THREAD_ANY)
+
+#define P4_GEN_ESCR_EMASK(class, name, bit) \
+ class##__##name = ((1 << bit) << P4_ESCR_EVENTMASK_SHIFT)
+#define P4_ESCR_EMASK_BIT(class, name) class##__##name
+
+/*
+ * config field is 64bit width and consists of
+ * HT << 63 | ESCR << 32 | CCCR
+ * where HT is HyperThreading bit (since ESCR
+ * has it reserved we may use it for own purpose)
+ *
+ * note that this is NOT the addresses of respective
+ * ESCR and CCCR but rather an only packed value should
+ * be unpacked and written to a proper addresses
+ *
+ * the base idea is to pack as much info as
+ * possible
+ */
+#define p4_config_pack_escr(v) (((u64)(v)) << 32)
+#define p4_config_pack_cccr(v) (((u64)(v)) & 0xffffffffULL)
+#define p4_config_unpack_escr(v) (((u64)(v)) >> 32)
+#define p4_config_unpack_cccr(v) (((u64)(v)) & 0xffffffffULL)
+
+#define p4_config_unpack_emask(v) \
+ ({ \
+ u32 t = p4_config_unpack_escr((v)); \
+ t = t & P4_ESCR_EVENTMASK_MASK; \
+ t = t >> P4_ESCR_EVENTMASK_SHIFT; \
+ t; \
+ })
+
+#define p4_config_unpack_event(v) \
+ ({ \
+ u32 t = p4_config_unpack_escr((v)); \
+ t = t & P4_ESCR_EVENT_MASK; \
+ t = t >> P4_ESCR_EVENT_SHIFT; \
+ t; \
+ })
+
+#define p4_config_unpack_cache_event(v) (((u64)(v)) & P4_CCCR_CACHE_OPS_MASK)
+
+#define P4_CONFIG_HT_SHIFT 63
+#define P4_CONFIG_HT (1ULL << P4_CONFIG_HT_SHIFT)
+
+static inline bool p4_is_event_cascaded(u64 config)
+{
+ u32 cccr = p4_config_unpack_cccr(config);
+ return !!(cccr & P4_CCCR_CASCADE);
+}
+
+static inline int p4_ht_config_thread(u64 config)
+{
+ return !!(config & P4_CONFIG_HT);
+}
+
+static inline u64 p4_set_ht_bit(u64 config)
+{
+ return config | P4_CONFIG_HT;
+}
+
+static inline u64 p4_clear_ht_bit(u64 config)
+{
+ return config & ~P4_CONFIG_HT;
+}
+
+static inline int p4_ht_active(void)
+{
+#ifdef CONFIG_SMP
+ return smp_num_siblings > 1;
+#endif
+ return 0;
+}
+
+static inline int p4_ht_thread(int cpu)
+{
+#ifdef CONFIG_SMP
+ if (smp_num_siblings == 2)
+ return cpu != cpumask_first(__get_cpu_var(cpu_sibling_map));
+#endif
+ return 0;
+}
+
+static inline int p4_should_swap_ts(u64 config, int cpu)
+{
+ return p4_ht_config_thread(config) ^ p4_ht_thread(cpu);
+}
+
+static inline u32 p4_default_cccr_conf(int cpu)
+{
+ /*
+ * Note that P4_CCCR_THREAD_ANY is "required" on
+ * non-HT machines (on HT machines we count TS events
+ * regardless the state of second logical processor
+ */
+ u32 cccr = P4_CCCR_THREAD_ANY;
+
+ if (!p4_ht_thread(cpu))
+ cccr |= P4_CCCR_OVF_PMI_T0;
+ else
+ cccr |= P4_CCCR_OVF_PMI_T1;
+
+ return cccr;
+}
+
+static inline u32 p4_default_escr_conf(int cpu, int exclude_os, int exclude_usr)
+{
+ u32 escr = 0;
+
+ if (!p4_ht_thread(cpu)) {
+ if (!exclude_os)
+ escr |= P4_ESCR_T0_OS;
+ if (!exclude_usr)
+ escr |= P4_ESCR_T0_USR;
+ } else {
+ if (!exclude_os)
+ escr |= P4_ESCR_T1_OS;
+ if (!exclude_usr)
+ escr |= P4_ESCR_T1_USR;
+ }
+
+ return escr;
+}
+
+enum P4_EVENTS {
+ P4_EVENT_TC_DELIVER_MODE,
+ P4_EVENT_BPU_FETCH_REQUEST,
+ P4_EVENT_ITLB_REFERENCE,
+ P4_EVENT_MEMORY_CANCEL,
+ P4_EVENT_MEMORY_COMPLETE,
+ P4_EVENT_LOAD_PORT_REPLAY,
+ P4_EVENT_STORE_PORT_REPLAY,
+ P4_EVENT_MOB_LOAD_REPLAY,
+ P4_EVENT_PAGE_WALK_TYPE,
+ P4_EVENT_BSQ_CACHE_REFERENCE,
+ P4_EVENT_IOQ_ALLOCATION,
+ P4_EVENT_IOQ_ACTIVE_ENTRIES,
+ P4_EVENT_FSB_DATA_ACTIVITY,
+ P4_EVENT_BSQ_ALLOCATION,
+ P4_EVENT_BSQ_ACTIVE_ENTRIES,
+ P4_EVENT_SSE_INPUT_ASSIST,
+ P4_EVENT_PACKED_SP_UOP,
+ P4_EVENT_PACKED_DP_UOP,
+ P4_EVENT_SCALAR_SP_UOP,
+ P4_EVENT_SCALAR_DP_UOP,
+ P4_EVENT_64BIT_MMX_UOP,
+ P4_EVENT_128BIT_MMX_UOP,
+ P4_EVENT_X87_FP_UOP,
+ P4_EVENT_TC_MISC,
+ P4_EVENT_GLOBAL_POWER_EVENTS,
+ P4_EVENT_TC_MS_XFER,
+ P4_EVENT_UOP_QUEUE_WRITES,
+ P4_EVENT_RETIRED_MISPRED_BRANCH_TYPE,
+ P4_EVENT_RETIRED_BRANCH_TYPE,
+ P4_EVENT_RESOURCE_STALL,
+ P4_EVENT_WC_BUFFER,
+ P4_EVENT_B2B_CYCLES,
+ P4_EVENT_BNR,
+ P4_EVENT_SNOOP,
+ P4_EVENT_RESPONSE,
+ P4_EVENT_FRONT_END_EVENT,
+ P4_EVENT_EXECUTION_EVENT,
+ P4_EVENT_REPLAY_EVENT,
+ P4_EVENT_INSTR_RETIRED,
+ P4_EVENT_UOPS_RETIRED,
+ P4_EVENT_UOP_TYPE,
+ P4_EVENT_BRANCH_RETIRED,
+ P4_EVENT_MISPRED_BRANCH_RETIRED,
+ P4_EVENT_X87_ASSIST,
+ P4_EVENT_MACHINE_CLEAR,
+ P4_EVENT_INSTR_COMPLETED,
+};
+
+#define P4_OPCODE(event) event##_OPCODE
+#define P4_OPCODE_ESEL(opcode) ((opcode & 0x00ff) >> 0)
+#define P4_OPCODE_EVNT(opcode) ((opcode & 0xff00) >> 8)
+#define P4_OPCODE_PACK(event, sel) (((event) << 8) | sel)
+
+/*
+ * Comments below the event represent ESCR restriction
+ * for this event and counter index per ESCR
+ *
+ * MSR_P4_IQ_ESCR0 and MSR_P4_IQ_ESCR1 are available only on early
+ * processor builds (family 0FH, models 01H-02H). These MSRs
+ * are not available on later versions, so that we don't use
+ * them completely
+ *
+ * Also note that CCCR1 do not have P4_CCCR_ENABLE bit properly
+ * working so that we should not use this CCCR and respective
+ * counter as result
+ */
+enum P4_EVENT_OPCODES {
+ P4_OPCODE(P4_EVENT_TC_DELIVER_MODE) = P4_OPCODE_PACK(0x01, 0x01),
+ /*
+ * MSR_P4_TC_ESCR0: 4, 5
+ * MSR_P4_TC_ESCR1: 6, 7
+ */
+
+ P4_OPCODE(P4_EVENT_BPU_FETCH_REQUEST) = P4_OPCODE_PACK(0x03, 0x00),
+ /*
+ * MSR_P4_BPU_ESCR0: 0, 1
+ * MSR_P4_BPU_ESCR1: 2, 3
+ */
+
+ P4_OPCODE(P4_EVENT_ITLB_REFERENCE) = P4_OPCODE_PACK(0x18, 0x03),
+ /*
+ * MSR_P4_ITLB_ESCR0: 0, 1
+ * MSR_P4_ITLB_ESCR1: 2, 3
+ */
+
+ P4_OPCODE(P4_EVENT_MEMORY_CANCEL) = P4_OPCODE_PACK(0x02, 0x05),
+ /*
+ * MSR_P4_DAC_ESCR0: 8, 9
+ * MSR_P4_DAC_ESCR1: 10, 11
+ */
+
+ P4_OPCODE(P4_EVENT_MEMORY_COMPLETE) = P4_OPCODE_PACK(0x08, 0x02),
+ /*
+ * MSR_P4_SAAT_ESCR0: 8, 9
+ * MSR_P4_SAAT_ESCR1: 10, 11
+ */
+
+ P4_OPCODE(P4_EVENT_LOAD_PORT_REPLAY) = P4_OPCODE_PACK(0x04, 0x02),
+ /*
+ * MSR_P4_SAAT_ESCR0: 8, 9
+ * MSR_P4_SAAT_ESCR1: 10, 11
+ */
+
+ P4_OPCODE(P4_EVENT_STORE_PORT_REPLAY) = P4_OPCODE_PACK(0x05, 0x02),
+ /*
+ * MSR_P4_SAAT_ESCR0: 8, 9
+ * MSR_P4_SAAT_ESCR1: 10, 11
+ */
+
+ P4_OPCODE(P4_EVENT_MOB_LOAD_REPLAY) = P4_OPCODE_PACK(0x03, 0x02),
+ /*
+ * MSR_P4_MOB_ESCR0: 0, 1
+ * MSR_P4_MOB_ESCR1: 2, 3
+ */
+
+ P4_OPCODE(P4_EVENT_PAGE_WALK_TYPE) = P4_OPCODE_PACK(0x01, 0x04),
+ /*
+ * MSR_P4_PMH_ESCR0: 0, 1
+ * MSR_P4_PMH_ESCR1: 2, 3
+ */
+
+ P4_OPCODE(P4_EVENT_BSQ_CACHE_REFERENCE) = P4_OPCODE_PACK(0x0c, 0x07),
+ /*
+ * MSR_P4_BSU_ESCR0: 0, 1
+ * MSR_P4_BSU_ESCR1: 2, 3
+ */
+
+ P4_OPCODE(P4_EVENT_IOQ_ALLOCATION) = P4_OPCODE_PACK(0x03, 0x06),
+ /*
+ * MSR_P4_FSB_ESCR0: 0, 1
+ * MSR_P4_FSB_ESCR1: 2, 3
+ */
+
+ P4_OPCODE(P4_EVENT_IOQ_ACTIVE_ENTRIES) = P4_OPCODE_PACK(0x1a, 0x06),
+ /*
+ * MSR_P4_FSB_ESCR1: 2, 3
+ */
+
+ P4_OPCODE(P4_EVENT_FSB_DATA_ACTIVITY) = P4_OPCODE_PACK(0x17, 0x06),
+ /*
+ * MSR_P4_FSB_ESCR0: 0, 1
+ * MSR_P4_FSB_ESCR1: 2, 3
+ */
+
+ P4_OPCODE(P4_EVENT_BSQ_ALLOCATION) = P4_OPCODE_PACK(0x05, 0x07),
+ /*
+ * MSR_P4_BSU_ESCR0: 0, 1
+ */
+
+ P4_OPCODE(P4_EVENT_BSQ_ACTIVE_ENTRIES) = P4_OPCODE_PACK(0x06, 0x07),
+ /*
+ * NOTE: no ESCR name in docs, it's guessed
+ * MSR_P4_BSU_ESCR1: 2, 3
+ */
+
+ P4_OPCODE(P4_EVENT_SSE_INPUT_ASSIST) = P4_OPCODE_PACK(0x34, 0x01),
+ /*
+ * MSR_P4_FIRM_ESCR0: 8, 9
+ * MSR_P4_FIRM_ESCR1: 10, 11
+ */
+
+ P4_OPCODE(P4_EVENT_PACKED_SP_UOP) = P4_OPCODE_PACK(0x08, 0x01),
+ /*
+ * MSR_P4_FIRM_ESCR0: 8, 9
+ * MSR_P4_FIRM_ESCR1: 10, 11
+ */
+
+ P4_OPCODE(P4_EVENT_PACKED_DP_UOP) = P4_OPCODE_PACK(0x0c, 0x01),
+ /*
+ * MSR_P4_FIRM_ESCR0: 8, 9
+ * MSR_P4_FIRM_ESCR1: 10, 11
+ */
+
+ P4_OPCODE(P4_EVENT_SCALAR_SP_UOP) = P4_OPCODE_PACK(0x0a, 0x01),
+ /*
+ * MSR_P4_FIRM_ESCR0: 8, 9
+ * MSR_P4_FIRM_ESCR1: 10, 11
+ */
+
+ P4_OPCODE(P4_EVENT_SCALAR_DP_UOP) = P4_OPCODE_PACK(0x0e, 0x01),
+ /*
+ * MSR_P4_FIRM_ESCR0: 8, 9
+ * MSR_P4_FIRM_ESCR1: 10, 11
+ */
+
+ P4_OPCODE(P4_EVENT_64BIT_MMX_UOP) = P4_OPCODE_PACK(0x02, 0x01),
+ /*
+ * MSR_P4_FIRM_ESCR0: 8, 9
+ * MSR_P4_FIRM_ESCR1: 10, 11
+ */
+
+ P4_OPCODE(P4_EVENT_128BIT_MMX_UOP) = P4_OPCODE_PACK(0x1a, 0x01),
+ /*
+ * MSR_P4_FIRM_ESCR0: 8, 9
+ * MSR_P4_FIRM_ESCR1: 10, 11
+ */
+
+ P4_OPCODE(P4_EVENT_X87_FP_UOP) = P4_OPCODE_PACK(0x04, 0x01),
+ /*
+ * MSR_P4_FIRM_ESCR0: 8, 9
+ * MSR_P4_FIRM_ESCR1: 10, 11
+ */
+
+ P4_OPCODE(P4_EVENT_TC_MISC) = P4_OPCODE_PACK(0x06, 0x01),
+ /*
+ * MSR_P4_TC_ESCR0: 4, 5
+ * MSR_P4_TC_ESCR1: 6, 7
+ */
+
+ P4_OPCODE(P4_EVENT_GLOBAL_POWER_EVENTS) = P4_OPCODE_PACK(0x13, 0x06),
+ /*
+ * MSR_P4_FSB_ESCR0: 0, 1
+ * MSR_P4_FSB_ESCR1: 2, 3
+ */
+
+ P4_OPCODE(P4_EVENT_TC_MS_XFER) = P4_OPCODE_PACK(0x05, 0x00),
+ /*
+ * MSR_P4_MS_ESCR0: 4, 5
+ * MSR_P4_MS_ESCR1: 6, 7
+ */
+
+ P4_OPCODE(P4_EVENT_UOP_QUEUE_WRITES) = P4_OPCODE_PACK(0x09, 0x00),
+ /*
+ * MSR_P4_MS_ESCR0: 4, 5
+ * MSR_P4_MS_ESCR1: 6, 7
+ */
+
+ P4_OPCODE(P4_EVENT_RETIRED_MISPRED_BRANCH_TYPE) = P4_OPCODE_PACK(0x05, 0x02),
+ /*
+ * MSR_P4_TBPU_ESCR0: 4, 5
+ * MSR_P4_TBPU_ESCR1: 6, 7
+ */
+
+ P4_OPCODE(P4_EVENT_RETIRED_BRANCH_TYPE) = P4_OPCODE_PACK(0x04, 0x02),
+ /*
+ * MSR_P4_TBPU_ESCR0: 4, 5
+ * MSR_P4_TBPU_ESCR1: 6, 7
+ */
+
+ P4_OPCODE(P4_EVENT_RESOURCE_STALL) = P4_OPCODE_PACK(0x01, 0x01),
+ /*
+ * MSR_P4_ALF_ESCR0: 12, 13, 16
+ * MSR_P4_ALF_ESCR1: 14, 15, 17
+ */
+
+ P4_OPCODE(P4_EVENT_WC_BUFFER) = P4_OPCODE_PACK(0x05, 0x05),
+ /*
+ * MSR_P4_DAC_ESCR0: 8, 9
+ * MSR_P4_DAC_ESCR1: 10, 11
+ */
+
+ P4_OPCODE(P4_EVENT_B2B_CYCLES) = P4_OPCODE_PACK(0x16, 0x03),
+ /*
+ * MSR_P4_FSB_ESCR0: 0, 1
+ * MSR_P4_FSB_ESCR1: 2, 3
+ */
+
+ P4_OPCODE(P4_EVENT_BNR) = P4_OPCODE_PACK(0x08, 0x03),
+ /*
+ * MSR_P4_FSB_ESCR0: 0, 1
+ * MSR_P4_FSB_ESCR1: 2, 3
+ */
+
+ P4_OPCODE(P4_EVENT_SNOOP) = P4_OPCODE_PACK(0x06, 0x03),
+ /*
+ * MSR_P4_FSB_ESCR0: 0, 1
+ * MSR_P4_FSB_ESCR1: 2, 3
+ */
+
+ P4_OPCODE(P4_EVENT_RESPONSE) = P4_OPCODE_PACK(0x04, 0x03),
+ /*
+ * MSR_P4_FSB_ESCR0: 0, 1
+ * MSR_P4_FSB_ESCR1: 2, 3
+ */
+
+ P4_OPCODE(P4_EVENT_FRONT_END_EVENT) = P4_OPCODE_PACK(0x08, 0x05),
+ /*
+ * MSR_P4_CRU_ESCR2: 12, 13, 16
+ * MSR_P4_CRU_ESCR3: 14, 15, 17
+ */
+
+ P4_OPCODE(P4_EVENT_EXECUTION_EVENT) = P4_OPCODE_PACK(0x0c, 0x05),
+ /*
+ * MSR_P4_CRU_ESCR2: 12, 13, 16
+ * MSR_P4_CRU_ESCR3: 14, 15, 17
+ */
+
+ P4_OPCODE(P4_EVENT_REPLAY_EVENT) = P4_OPCODE_PACK(0x09, 0x05),
+ /*
+ * MSR_P4_CRU_ESCR2: 12, 13, 16
+ * MSR_P4_CRU_ESCR3: 14, 15, 17
+ */
+
+ P4_OPCODE(P4_EVENT_INSTR_RETIRED) = P4_OPCODE_PACK(0x02, 0x04),
+ /*
+ * MSR_P4_CRU_ESCR0: 12, 13, 16
+ * MSR_P4_CRU_ESCR1: 14, 15, 17
+ */
+
+ P4_OPCODE(P4_EVENT_UOPS_RETIRED) = P4_OPCODE_PACK(0x01, 0x04),
+ /*
+ * MSR_P4_CRU_ESCR0: 12, 13, 16
+ * MSR_P4_CRU_ESCR1: 14, 15, 17
+ */
+
+ P4_OPCODE(P4_EVENT_UOP_TYPE) = P4_OPCODE_PACK(0x02, 0x02),
+ /*
+ * MSR_P4_RAT_ESCR0: 12, 13, 16
+ * MSR_P4_RAT_ESCR1: 14, 15, 17
+ */
+
+ P4_OPCODE(P4_EVENT_BRANCH_RETIRED) = P4_OPCODE_PACK(0x06, 0x05),
+ /*
+ * MSR_P4_CRU_ESCR2: 12, 13, 16
+ * MSR_P4_CRU_ESCR3: 14, 15, 17
+ */
+
+ P4_OPCODE(P4_EVENT_MISPRED_BRANCH_RETIRED) = P4_OPCODE_PACK(0x03, 0x04),
+ /*
+ * MSR_P4_CRU_ESCR0: 12, 13, 16
+ * MSR_P4_CRU_ESCR1: 14, 15, 17
+ */
+
+ P4_OPCODE(P4_EVENT_X87_ASSIST) = P4_OPCODE_PACK(0x03, 0x05),
+ /*
+ * MSR_P4_CRU_ESCR2: 12, 13, 16
+ * MSR_P4_CRU_ESCR3: 14, 15, 17
+ */
+
+ P4_OPCODE(P4_EVENT_MACHINE_CLEAR) = P4_OPCODE_PACK(0x02, 0x05),
+ /*
+ * MSR_P4_CRU_ESCR2: 12, 13, 16
+ * MSR_P4_CRU_ESCR3: 14, 15, 17
+ */
+
+ P4_OPCODE(P4_EVENT_INSTR_COMPLETED) = P4_OPCODE_PACK(0x07, 0x04),
+ /*
+ * MSR_P4_CRU_ESCR0: 12, 13, 16
+ * MSR_P4_CRU_ESCR1: 14, 15, 17
+ */
+};
+
+/*
+ * a caller should use P4_ESCR_EMASK_NAME helper to
+ * pick the EventMask needed, for example
+ *
+ * P4_ESCR_EMASK_NAME(P4_EVENT_TC_DELIVER_MODE, DD)
+ */
+enum P4_ESCR_EMASKS {
+ P4_GEN_ESCR_EMASK(P4_EVENT_TC_DELIVER_MODE, DD, 0),
+ P4_GEN_ESCR_EMASK(P4_EVENT_TC_DELIVER_MODE, DB, 1),
+ P4_GEN_ESCR_EMASK(P4_EVENT_TC_DELIVER_MODE, DI, 2),
+ P4_GEN_ESCR_EMASK(P4_EVENT_TC_DELIVER_MODE, BD, 3),
+ P4_GEN_ESCR_EMASK(P4_EVENT_TC_DELIVER_MODE, BB, 4),
+ P4_GEN_ESCR_EMASK(P4_EVENT_TC_DELIVER_MODE, BI, 5),
+ P4_GEN_ESCR_EMASK(P4_EVENT_TC_DELIVER_MODE, ID, 6),
+
+ P4_GEN_ESCR_EMASK(P4_EVENT_BPU_FETCH_REQUEST, TCMISS, 0),
+
+ P4_GEN_ESCR_EMASK(P4_EVENT_ITLB_REFERENCE, HIT, 0),
+ P4_GEN_ESCR_EMASK(P4_EVENT_ITLB_REFERENCE, MISS, 1),
+ P4_GEN_ESCR_EMASK(P4_EVENT_ITLB_REFERENCE, HIT_UK, 2),
+
+ P4_GEN_ESCR_EMASK(P4_EVENT_MEMORY_CANCEL, ST_RB_FULL, 2),
+ P4_GEN_ESCR_EMASK(P4_EVENT_MEMORY_CANCEL, 64K_CONF, 3),
+
+ P4_GEN_ESCR_EMASK(P4_EVENT_MEMORY_COMPLETE, LSC, 0),
+ P4_GEN_ESCR_EMASK(P4_EVENT_MEMORY_COMPLETE, SSC, 1),
+
+ P4_GEN_ESCR_EMASK(P4_EVENT_LOAD_PORT_REPLAY, SPLIT_LD, 1),
+
+ P4_GEN_ESCR_EMASK(P4_EVENT_STORE_PORT_REPLAY, SPLIT_ST, 1),
+
+ P4_GEN_ESCR_EMASK(P4_EVENT_MOB_LOAD_REPLAY, NO_STA, 1),
+ P4_GEN_ESCR_EMASK(P4_EVENT_MOB_LOAD_REPLAY, NO_STD, 3),
+ P4_GEN_ESCR_EMASK(P4_EVENT_MOB_LOAD_REPLAY, PARTIAL_DATA, 4),
+ P4_GEN_ESCR_EMASK(P4_EVENT_MOB_LOAD_REPLAY, UNALGN_ADDR, 5),
+
+ P4_GEN_ESCR_EMASK(P4_EVENT_PAGE_WALK_TYPE, DTMISS, 0),
+ P4_GEN_ESCR_EMASK(P4_EVENT_PAGE_WALK_TYPE, ITMISS, 1),
+
+ P4_GEN_ESCR_EMASK(P4_EVENT_BSQ_CACHE_REFERENCE, RD_2ndL_HITS, 0),
+ P4_GEN_ESCR_EMASK(P4_EVENT_BSQ_CACHE_REFERENCE, RD_2ndL_HITE, 1),
+ P4_GEN_ESCR_EMASK(P4_EVENT_BSQ_CACHE_REFERENCE, RD_2ndL_HITM, 2),
+ P4_GEN_ESCR_EMASK(P4_EVENT_BSQ_CACHE_REFERENCE, RD_3rdL_HITS, 3),
+ P4_GEN_ESCR_EMASK(P4_EVENT_BSQ_CACHE_REFERENCE, RD_3rdL_HITE, 4),
+ P4_GEN_ESCR_EMASK(P4_EVENT_BSQ_CACHE_REFERENCE, RD_3rdL_HITM, 5),
+ P4_GEN_ESCR_EMASK(P4_EVENT_BSQ_CACHE_REFERENCE, RD_2ndL_MISS, 8),
+ P4_GEN_ESCR_EMASK(P4_EVENT_BSQ_CACHE_REFERENCE, RD_3rdL_MISS, 9),
+ P4_GEN_ESCR_EMASK(P4_EVENT_BSQ_CACHE_REFERENCE, WR_2ndL_MISS, 10),
+
+ P4_GEN_ESCR_EMASK(P4_EVENT_IOQ_ALLOCATION, DEFAULT, 0),
+ P4_GEN_ESCR_EMASK(P4_EVENT_IOQ_ALLOCATION, ALL_READ, 5),
+ P4_GEN_ESCR_EMASK(P4_EVENT_IOQ_ALLOCATION, ALL_WRITE, 6),
+ P4_GEN_ESCR_EMASK(P4_EVENT_IOQ_ALLOCATION, MEM_UC, 7),
+ P4_GEN_ESCR_EMASK(P4_EVENT_IOQ_ALLOCATION, MEM_WC, 8),
+ P4_GEN_ESCR_EMASK(P4_EVENT_IOQ_ALLOCATION, MEM_WT, 9),
+ P4_GEN_ESCR_EMASK(P4_EVENT_IOQ_ALLOCATION, MEM_WP, 10),
+ P4_GEN_ESCR_EMASK(P4_EVENT_IOQ_ALLOCATION, MEM_WB, 11),
+ P4_GEN_ESCR_EMASK(P4_EVENT_IOQ_ALLOCATION, OWN, 13),
+ P4_GEN_ESCR_EMASK(P4_EVENT_IOQ_ALLOCATION, OTHER, 14),
+ P4_GEN_ESCR_EMASK(P4_EVENT_IOQ_ALLOCATION, PREFETCH, 15),
+
+ P4_GEN_ESCR_EMASK(P4_EVENT_IOQ_ACTIVE_ENTRIES, DEFAULT, 0),
+ P4_GEN_ESCR_EMASK(P4_EVENT_IOQ_ACTIVE_ENTRIES, ALL_READ, 5),
+ P4_GEN_ESCR_EMASK(P4_EVENT_IOQ_ACTIVE_ENTRIES, ALL_WRITE, 6),
+ P4_GEN_ESCR_EMASK(P4_EVENT_IOQ_ACTIVE_ENTRIES, MEM_UC, 7),
+ P4_GEN_ESCR_EMASK(P4_EVENT_IOQ_ACTIVE_ENTRIES, MEM_WC, 8),
+ P4_GEN_ESCR_EMASK(P4_EVENT_IOQ_ACTIVE_ENTRIES, MEM_WT, 9),
+ P4_GEN_ESCR_EMASK(P4_EVENT_IOQ_ACTIVE_ENTRIES, MEM_WP, 10),
+ P4_GEN_ESCR_EMASK(P4_EVENT_IOQ_ACTIVE_ENTRIES, MEM_WB, 11),
+ P4_GEN_ESCR_EMASK(P4_EVENT_IOQ_ACTIVE_ENTRIES, OWN, 13),
+ P4_GEN_ESCR_EMASK(P4_EVENT_IOQ_ACTIVE_ENTRIES, OTHER, 14),
+ P4_GEN_ESCR_EMASK(P4_EVENT_IOQ_ACTIVE_ENTRIES, PREFETCH, 15),
+
+ P4_GEN_ESCR_EMASK(P4_EVENT_FSB_DATA_ACTIVITY, DRDY_DRV, 0),
+ P4_GEN_ESCR_EMASK(P4_EVENT_FSB_DATA_ACTIVITY, DRDY_OWN, 1),
+ P4_GEN_ESCR_EMASK(P4_EVENT_FSB_DATA_ACTIVITY, DRDY_OTHER, 2),
+ P4_GEN_ESCR_EMASK(P4_EVENT_FSB_DATA_ACTIVITY, DBSY_DRV, 3),
+ P4_GEN_ESCR_EMASK(P4_EVENT_FSB_DATA_ACTIVITY, DBSY_OWN, 4),
+ P4_GEN_ESCR_EMASK(P4_EVENT_FSB_DATA_ACTIVITY, DBSY_OTHER, 5),
+
+ P4_GEN_ESCR_EMASK(P4_EVENT_BSQ_ALLOCATION, REQ_TYPE0, 0),
+ P4_GEN_ESCR_EMASK(P4_EVENT_BSQ_ALLOCATION, REQ_TYPE1, 1),
+ P4_GEN_ESCR_EMASK(P4_EVENT_BSQ_ALLOCATION, REQ_LEN0, 2),
+ P4_GEN_ESCR_EMASK(P4_EVENT_BSQ_ALLOCATION, REQ_LEN1, 3),
+ P4_GEN_ESCR_EMASK(P4_EVENT_BSQ_ALLOCATION, REQ_IO_TYPE, 5),
+ P4_GEN_ESCR_EMASK(P4_EVENT_BSQ_ALLOCATION, REQ_LOCK_TYPE, 6),
+ P4_GEN_ESCR_EMASK(P4_EVENT_BSQ_ALLOCATION, REQ_CACHE_TYPE, 7),
+ P4_GEN_ESCR_EMASK(P4_EVENT_BSQ_ALLOCATION, REQ_SPLIT_TYPE, 8),
+ P4_GEN_ESCR_EMASK(P4_EVENT_BSQ_ALLOCATION, REQ_DEM_TYPE, 9),
+ P4_GEN_ESCR_EMASK(P4_EVENT_BSQ_ALLOCATION, REQ_ORD_TYPE, 10),
+ P4_GEN_ESCR_EMASK(P4_EVENT_BSQ_ALLOCATION, MEM_TYPE0, 11),
+ P4_GEN_ESCR_EMASK(P4_EVENT_BSQ_ALLOCATION, MEM_TYPE1, 12),
+ P4_GEN_ESCR_EMASK(P4_EVENT_BSQ_ALLOCATION, MEM_TYPE2, 13),
+
+ P4_GEN_ESCR_EMASK(P4_EVENT_BSQ_ACTIVE_ENTRIES, REQ_TYPE0, 0),
+ P4_GEN_ESCR_EMASK(P4_EVENT_BSQ_ACTIVE_ENTRIES, REQ_TYPE1, 1),
+ P4_GEN_ESCR_EMASK(P4_EVENT_BSQ_ACTIVE_ENTRIES, REQ_LEN0, 2),
+ P4_GEN_ESCR_EMASK(P4_EVENT_BSQ_ACTIVE_ENTRIES, REQ_LEN1, 3),
+ P4_GEN_ESCR_EMASK(P4_EVENT_BSQ_ACTIVE_ENTRIES, REQ_IO_TYPE, 5),
+ P4_GEN_ESCR_EMASK(P4_EVENT_BSQ_ACTIVE_ENTRIES, REQ_LOCK_TYPE, 6),
+ P4_GEN_ESCR_EMASK(P4_EVENT_BSQ_ACTIVE_ENTRIES, REQ_CACHE_TYPE, 7),
+ P4_GEN_ESCR_EMASK(P4_EVENT_BSQ_ACTIVE_ENTRIES, REQ_SPLIT_TYPE, 8),
+ P4_GEN_ESCR_EMASK(P4_EVENT_BSQ_ACTIVE_ENTRIES, REQ_DEM_TYPE, 9),
+ P4_GEN_ESCR_EMASK(P4_EVENT_BSQ_ACTIVE_ENTRIES, REQ_ORD_TYPE, 10),
+ P4_GEN_ESCR_EMASK(P4_EVENT_BSQ_ACTIVE_ENTRIES, MEM_TYPE0, 11),
+ P4_GEN_ESCR_EMASK(P4_EVENT_BSQ_ACTIVE_ENTRIES, MEM_TYPE1, 12),
+ P4_GEN_ESCR_EMASK(P4_EVENT_BSQ_ACTIVE_ENTRIES, MEM_TYPE2, 13),
+
+ P4_GEN_ESCR_EMASK(P4_EVENT_SSE_INPUT_ASSIST, ALL, 15),
+
+ P4_GEN_ESCR_EMASK(P4_EVENT_PACKED_SP_UOP, ALL, 15),
+
+ P4_GEN_ESCR_EMASK(P4_EVENT_PACKED_DP_UOP, ALL, 15),
+
+ P4_GEN_ESCR_EMASK(P4_EVENT_SCALAR_SP_UOP, ALL, 15),
+
+ P4_GEN_ESCR_EMASK(P4_EVENT_SCALAR_DP_UOP, ALL, 15),
+
+ P4_GEN_ESCR_EMASK(P4_EVENT_64BIT_MMX_UOP, ALL, 15),
+
+ P4_GEN_ESCR_EMASK(P4_EVENT_128BIT_MMX_UOP, ALL, 15),
+
+ P4_GEN_ESCR_EMASK(P4_EVENT_X87_FP_UOP, ALL, 15),
+
+ P4_GEN_ESCR_EMASK(P4_EVENT_TC_MISC, FLUSH, 4),
+
+ P4_GEN_ESCR_EMASK(P4_EVENT_GLOBAL_POWER_EVENTS, RUNNING, 0),
+
+ P4_GEN_ESCR_EMASK(P4_EVENT_TC_MS_XFER, CISC, 0),
+
+ P4_GEN_ESCR_EMASK(P4_EVENT_UOP_QUEUE_WRITES, FROM_TC_BUILD, 0),
+ P4_GEN_ESCR_EMASK(P4_EVENT_UOP_QUEUE_WRITES, FROM_TC_DELIVER, 1),
+ P4_GEN_ESCR_EMASK(P4_EVENT_UOP_QUEUE_WRITES, FROM_ROM, 2),
+
+ P4_GEN_ESCR_EMASK(P4_EVENT_RETIRED_MISPRED_BRANCH_TYPE, CONDITIONAL, 1),
+ P4_GEN_ESCR_EMASK(P4_EVENT_RETIRED_MISPRED_BRANCH_TYPE, CALL, 2),
+ P4_GEN_ESCR_EMASK(P4_EVENT_RETIRED_MISPRED_BRANCH_TYPE, RETURN, 3),
+ P4_GEN_ESCR_EMASK(P4_EVENT_RETIRED_MISPRED_BRANCH_TYPE, INDIRECT, 4),
+
+ P4_GEN_ESCR_EMASK(P4_EVENT_RETIRED_BRANCH_TYPE, CONDITIONAL, 1),
+ P4_GEN_ESCR_EMASK(P4_EVENT_RETIRED_BRANCH_TYPE, CALL, 2),
+ P4_GEN_ESCR_EMASK(P4_EVENT_RETIRED_BRANCH_TYPE, RETURN, 3),
+ P4_GEN_ESCR_EMASK(P4_EVENT_RETIRED_BRANCH_TYPE, INDIRECT, 4),
+
+ P4_GEN_ESCR_EMASK(P4_EVENT_RESOURCE_STALL, SBFULL, 5),
+
+ P4_GEN_ESCR_EMASK(P4_EVENT_WC_BUFFER, WCB_EVICTS, 0),
+ P4_GEN_ESCR_EMASK(P4_EVENT_WC_BUFFER, WCB_FULL_EVICTS, 1),
+
+ P4_GEN_ESCR_EMASK(P4_EVENT_FRONT_END_EVENT, NBOGUS, 0),
+ P4_GEN_ESCR_EMASK(P4_EVENT_FRONT_END_EVENT, BOGUS, 1),
+
+ P4_GEN_ESCR_EMASK(P4_EVENT_EXECUTION_EVENT, NBOGUS0, 0),
+ P4_GEN_ESCR_EMASK(P4_EVENT_EXECUTION_EVENT, NBOGUS1, 1),
+ P4_GEN_ESCR_EMASK(P4_EVENT_EXECUTION_EVENT, NBOGUS2, 2),
+ P4_GEN_ESCR_EMASK(P4_EVENT_EXECUTION_EVENT, NBOGUS3, 3),
+ P4_GEN_ESCR_EMASK(P4_EVENT_EXECUTION_EVENT, BOGUS0, 4),
+ P4_GEN_ESCR_EMASK(P4_EVENT_EXECUTION_EVENT, BOGUS1, 5),
+ P4_GEN_ESCR_EMASK(P4_EVENT_EXECUTION_EVENT, BOGUS2, 6),
+ P4_GEN_ESCR_EMASK(P4_EVENT_EXECUTION_EVENT, BOGUS3, 7),
+
+ P4_GEN_ESCR_EMASK(P4_EVENT_REPLAY_EVENT, NBOGUS, 0),
+ P4_GEN_ESCR_EMASK(P4_EVENT_REPLAY_EVENT, BOGUS, 1),
+
+ P4_GEN_ESCR_EMASK(P4_EVENT_INSTR_RETIRED, NBOGUSNTAG, 0),
+ P4_GEN_ESCR_EMASK(P4_EVENT_INSTR_RETIRED, NBOGUSTAG, 1),
+ P4_GEN_ESCR_EMASK(P4_EVENT_INSTR_RETIRED, BOGUSNTAG, 2),
+ P4_GEN_ESCR_EMASK(P4_EVENT_INSTR_RETIRED, BOGUSTAG, 3),
+
+ P4_GEN_ESCR_EMASK(P4_EVENT_UOPS_RETIRED, NBOGUS, 0),
+ P4_GEN_ESCR_EMASK(P4_EVENT_UOPS_RETIRED, BOGUS, 1),
+
+ P4_GEN_ESCR_EMASK(P4_EVENT_UOP_TYPE, TAGLOADS, 1),
+ P4_GEN_ESCR_EMASK(P4_EVENT_UOP_TYPE, TAGSTORES, 2),
+
+ P4_GEN_ESCR_EMASK(P4_EVENT_BRANCH_RETIRED, MMNP, 0),
+ P4_GEN_ESCR_EMASK(P4_EVENT_BRANCH_RETIRED, MMNM, 1),
+ P4_GEN_ESCR_EMASK(P4_EVENT_BRANCH_RETIRED, MMTP, 2),
+ P4_GEN_ESCR_EMASK(P4_EVENT_BRANCH_RETIRED, MMTM, 3),
+
+ P4_GEN_ESCR_EMASK(P4_EVENT_MISPRED_BRANCH_RETIRED, NBOGUS, 0),
+
+ P4_GEN_ESCR_EMASK(P4_EVENT_X87_ASSIST, FPSU, 0),
+ P4_GEN_ESCR_EMASK(P4_EVENT_X87_ASSIST, FPSO, 1),
+ P4_GEN_ESCR_EMASK(P4_EVENT_X87_ASSIST, POAO, 2),
+ P4_GEN_ESCR_EMASK(P4_EVENT_X87_ASSIST, POAU, 3),
+ P4_GEN_ESCR_EMASK(P4_EVENT_X87_ASSIST, PREA, 4),
+
+ P4_GEN_ESCR_EMASK(P4_EVENT_MACHINE_CLEAR, CLEAR, 0),
+ P4_GEN_ESCR_EMASK(P4_EVENT_MACHINE_CLEAR, MOCLEAR, 1),
+ P4_GEN_ESCR_EMASK(P4_EVENT_MACHINE_CLEAR, SMCLEAR, 2),
+
+ P4_GEN_ESCR_EMASK(P4_EVENT_INSTR_COMPLETED, NBOGUS, 0),
+ P4_GEN_ESCR_EMASK(P4_EVENT_INSTR_COMPLETED, BOGUS, 1),
+};
+
+/* P4 PEBS: stale for a while */
+#define P4_PEBS_METRIC_MASK 0x00001fffU
+#define P4_PEBS_UOB_TAG 0x01000000U
+#define P4_PEBS_ENABLE 0x02000000U
+
+/* Replay metrics for MSR_IA32_PEBS_ENABLE and MSR_P4_PEBS_MATRIX_VERT */
+#define P4_PEBS__1stl_cache_load_miss_retired 0x3000001
+#define P4_PEBS__2ndl_cache_load_miss_retired 0x3000002
+#define P4_PEBS__dtlb_load_miss_retired 0x3000004
+#define P4_PEBS__dtlb_store_miss_retired 0x3000004
+#define P4_PEBS__dtlb_all_miss_retired 0x3000004
+#define P4_PEBS__tagged_mispred_branch 0x3018000
+#define P4_PEBS__mob_load_replay_retired 0x3000200
+#define P4_PEBS__split_load_retired 0x3000400
+#define P4_PEBS__split_store_retired 0x3000400
+
+#define P4_VERT__1stl_cache_load_miss_retired 0x0000001
+#define P4_VERT__2ndl_cache_load_miss_retired 0x0000001
+#define P4_VERT__dtlb_load_miss_retired 0x0000001
+#define P4_VERT__dtlb_store_miss_retired 0x0000002
+#define P4_VERT__dtlb_all_miss_retired 0x0000003
+#define P4_VERT__tagged_mispred_branch 0x0000010
+#define P4_VERT__mob_load_replay_retired 0x0000001
+#define P4_VERT__split_load_retired 0x0000001
+#define P4_VERT__split_store_retired 0x0000002
+
+enum P4_CACHE_EVENTS {
+ P4_CACHE__NONE,
+
+ P4_CACHE__1stl_cache_load_miss_retired,
+ P4_CACHE__2ndl_cache_load_miss_retired,
+ P4_CACHE__dtlb_load_miss_retired,
+ P4_CACHE__dtlb_store_miss_retired,
+ P4_CACHE__itlb_reference_hit,
+ P4_CACHE__itlb_reference_miss,
+
+ P4_CACHE__MAX
+};
+
+#endif /* PERF_EVENT_P4_H */
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index b753ea5..32428b4 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -21,7 +21,6 @@ struct mm_struct;
#include <asm/msr.h>
#include <asm/desc_defs.h>
#include <asm/nops.h>
-#include <asm/ds.h>
#include <linux/personality.h>
#include <linux/cpumask.h>
@@ -29,6 +28,7 @@ struct mm_struct;
#include <linux/threads.h>
#include <linux/math64.h>
#include <linux/init.h>
+#include <linux/err.h>
#define HBP_NUM 4
/*
@@ -473,10 +473,6 @@ struct thread_struct {
unsigned long iopl;
/* Max allowed port in the bitmap, in bytes: */
unsigned io_bitmap_max;
-/* MSR_IA32_DEBUGCTLMSR value to switch in if TIF_DEBUGCTLMSR is set. */
- unsigned long debugctlmsr;
- /* Debug Store context; see asm/ds.h */
- struct ds_context *ds_ctx;
};
static inline unsigned long native_get_debugreg(int regno)
@@ -803,7 +799,7 @@ extern void cpu_init(void);
static inline unsigned long get_debugctlmsr(void)
{
- unsigned long debugctlmsr = 0;
+ unsigned long debugctlmsr = 0;
#ifndef CONFIG_X86_DEBUGCTLMSR
if (boot_cpu_data.x86 < 6)
@@ -811,21 +807,6 @@ static inline unsigned long get_debugctlmsr(void)
#endif
rdmsrl(MSR_IA32_DEBUGCTLMSR, debugctlmsr);
- return debugctlmsr;
-}
-
-static inline unsigned long get_debugctlmsr_on_cpu(int cpu)
-{
- u64 debugctlmsr = 0;
- u32 val1, val2;
-
-#ifndef CONFIG_X86_DEBUGCTLMSR
- if (boot_cpu_data.x86 < 6)
- return 0;
-#endif
- rdmsr_on_cpu(cpu, MSR_IA32_DEBUGCTLMSR, &val1, &val2);
- debugctlmsr = val1 | ((u64)val2 << 32);
-
return debugctlmsr;
}
@@ -838,18 +819,6 @@ static inline void update_debugctlmsr(unsigned long debugctlmsr)
wrmsrl(MSR_IA32_DEBUGCTLMSR, debugctlmsr);
}
-static inline void update_debugctlmsr_on_cpu(int cpu,
- unsigned long debugctlmsr)
-{
-#ifndef CONFIG_X86_DEBUGCTLMSR
- if (boot_cpu_data.x86 < 6)
- return;
-#endif
- wrmsr_on_cpu(cpu, MSR_IA32_DEBUGCTLMSR,
- (u32)((u64)debugctlmsr),
- (u32)((u64)debugctlmsr >> 32));
-}
-
/*
* from system description table in BIOS. Mostly for MCA use, but
* others may find it useful:
diff --git a/arch/x86/include/asm/ptrace-abi.h b/arch/x86/include/asm/ptrace-abi.h
index 8672303..52b098a 100644
--- a/arch/x86/include/asm/ptrace-abi.h
+++ b/arch/x86/include/asm/ptrace-abi.h
@@ -82,61 +82,6 @@
#ifndef __ASSEMBLY__
#include <linux/types.h>
-
-/* configuration/status structure used in PTRACE_BTS_CONFIG and
- PTRACE_BTS_STATUS commands.
-*/
-struct ptrace_bts_config {
- /* requested or actual size of BTS buffer in bytes */
- __u32 size;
- /* bitmask of below flags */
- __u32 flags;
- /* buffer overflow signal */
- __u32 signal;
- /* actual size of bts_struct in bytes */
- __u32 bts_size;
-};
-#endif /* __ASSEMBLY__ */
-
-#define PTRACE_BTS_O_TRACE 0x1 /* branch trace */
-#define PTRACE_BTS_O_SCHED 0x2 /* scheduling events w/ jiffies */
-#define PTRACE_BTS_O_SIGNAL 0x4 /* send SIG<signal> on buffer overflow
- instead of wrapping around */
-#define PTRACE_BTS_O_ALLOC 0x8 /* (re)allocate buffer */
-
-#define PTRACE_BTS_CONFIG 40
-/* Configure branch trace recording.
- ADDR points to a struct ptrace_bts_config.
- DATA gives the size of that buffer.
- A new buffer is allocated, if requested in the flags.
- An overflow signal may only be requested for new buffers.
- Returns the number of bytes read.
-*/
-#define PTRACE_BTS_STATUS 41
-/* Return the current configuration in a struct ptrace_bts_config
- pointed to by ADDR; DATA gives the size of that buffer.
- Returns the number of bytes written.
-*/
-#define PTRACE_BTS_SIZE 42
-/* Return the number of available BTS records for draining.
- DATA and ADDR are ignored.
-*/
-#define PTRACE_BTS_GET 43
-/* Get a single BTS record.
- DATA defines the index into the BTS array, where 0 is the newest
- entry, and higher indices refer to older entries.
- ADDR is pointing to struct bts_struct (see asm/ds.h).
-*/
-#define PTRACE_BTS_CLEAR 44
-/* Clear the BTS buffer.
- DATA and ADDR are ignored.
-*/
-#define PTRACE_BTS_DRAIN 45
-/* Read all available BTS records and clear the buffer.
- ADDR points to an array of struct bts_struct.
- DATA gives the size of that buffer.
- BTS records are read from oldest to newest.
- Returns number of BTS records drained.
-*/
+#endif
#endif /* _ASM_X86_PTRACE_ABI_H */
diff --git a/arch/x86/include/asm/ptrace.h b/arch/x86/include/asm/ptrace.h
index 69a686a..78cd1ea 100644
--- a/arch/x86/include/asm/ptrace.h
+++ b/arch/x86/include/asm/ptrace.h
@@ -289,12 +289,6 @@ extern int do_get_thread_area(struct task_struct *p, int idx,
extern int do_set_thread_area(struct task_struct *p, int idx,
struct user_desc __user *info, int can_allocate);
-#ifdef CONFIG_X86_PTRACE_BTS
-extern void ptrace_bts_untrace(struct task_struct *tsk);
-
-#define arch_ptrace_untrace(tsk) ptrace_bts_untrace(tsk)
-#endif /* CONFIG_X86_PTRACE_BTS */
-
#endif /* __KERNEL__ */
#endif /* !__ASSEMBLY__ */
diff --git a/arch/x86/include/asm/thread_info.h b/arch/x86/include/asm/thread_info.h
index e0d2890..d017ed55 100644
--- a/arch/x86/include/asm/thread_info.h
+++ b/arch/x86/include/asm/thread_info.h
@@ -92,8 +92,7 @@ struct thread_info {
#define TIF_IO_BITMAP 22 /* uses I/O bitmap */
#define TIF_FREEZE 23 /* is freezing for suspend */
#define TIF_FORCED_TF 24 /* true if TF in eflags artificially */
-#define TIF_DEBUGCTLMSR 25 /* uses thread_struct.debugctlmsr */
-#define TIF_DS_AREA_MSR 26 /* uses thread_struct.ds_area_msr */
+#define TIF_BLOCKSTEP 25 /* set when we want DEBUGCTLMSR_BTF */
#define TIF_LAZY_MMU_UPDATES 27 /* task is updating the mmu lazily */
#define TIF_SYSCALL_TRACEPOINT 28 /* syscall tracepoint instrumentation */
@@ -115,8 +114,7 @@ struct thread_info {
#define _TIF_IO_BITMAP (1 << TIF_IO_BITMAP)
#define _TIF_FREEZE (1 << TIF_FREEZE)
#define _TIF_FORCED_TF (1 << TIF_FORCED_TF)
-#define _TIF_DEBUGCTLMSR (1 << TIF_DEBUGCTLMSR)
-#define _TIF_DS_AREA_MSR (1 << TIF_DS_AREA_MSR)
+#define _TIF_BLOCKSTEP (1 << TIF_BLOCKSTEP)
#define _TIF_LAZY_MMU_UPDATES (1 << TIF_LAZY_MMU_UPDATES)
#define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT)
@@ -147,7 +145,7 @@ struct thread_info {
/* flags to check in __switch_to() */
#define _TIF_WORK_CTXSW \
- (_TIF_IO_BITMAP|_TIF_DEBUGCTLMSR|_TIF_DS_AREA_MSR|_TIF_NOTSC)
+ (_TIF_IO_BITMAP|_TIF_NOTSC|_TIF_BLOCKSTEP)
#define _TIF_WORK_CTXSW_PREV (_TIF_WORK_CTXSW|_TIF_USER_RETURN_NOTIFY)
#define _TIF_WORK_CTXSW_NEXT (_TIF_WORK_CTXSW|_TIF_DEBUG)
diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
index 4c58352..e77b220 100644
--- a/arch/x86/kernel/Makefile
+++ b/arch/x86/kernel/Makefile
@@ -47,8 +47,6 @@ obj-$(CONFIG_X86_TRAMPOLINE) += trampoline.o
obj-y += process.o
obj-y += i387.o xsave.o
obj-y += ptrace.o
-obj-$(CONFIG_X86_DS) += ds.o
-obj-$(CONFIG_X86_DS_SELFTEST) += ds_selftest.o
obj-$(CONFIG_X86_32) += tls.o
obj-$(CONFIG_IA32_EMULATION) += tls.o
obj-y += step.o
diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c
index 7e1cca1..d72377c 100644
--- a/arch/x86/kernel/cpu/intel.c
+++ b/arch/x86/kernel/cpu/intel.c
@@ -12,7 +12,6 @@
#include <asm/processor.h>
#include <asm/pgtable.h>
#include <asm/msr.h>
-#include <asm/ds.h>
#include <asm/bugs.h>
#include <asm/cpu.h>
@@ -367,7 +366,6 @@ static void __cpuinit init_intel(struct cpuinfo_x86 *c)
set_cpu_cap(c, X86_FEATURE_BTS);
if (!(l1 & (1<<12)))
set_cpu_cap(c, X86_FEATURE_PEBS);
- ds_init_intel(c);
}
if (c->x86 == 6 && c->x86_model == 29 && cpu_has_clflush)
diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c
index db5bdc8..2ea78ab 100644
--- a/arch/x86/kernel/cpu/perf_event.c
+++ b/arch/x86/kernel/cpu/perf_event.c
@@ -31,46 +31,51 @@
#include <asm/nmi.h>
#include <asm/compat.h>
-static u64 perf_event_mask __read_mostly;
+#if 0
+#undef wrmsrl
+#define wrmsrl(msr, val) \
+do { \
+ trace_printk("wrmsrl(%lx, %lx)\n", (unsigned long)(msr),\
+ (unsigned long)(val)); \
+ native_write_msr((msr), (u32)((u64)(val)), \
+ (u32)((u64)(val) >> 32)); \
+} while (0)
+#endif
-/* The maximal number of PEBS events: */
-#define MAX_PEBS_EVENTS 4
+/*
+ * best effort, GUP based copy_from_user() that assumes IRQ or NMI context
+ */
+static unsigned long
+copy_from_user_nmi(void *to, const void __user *from, unsigned long n)
+{
+ unsigned long offset, addr = (unsigned long)from;
+ int type = in_nmi() ? KM_NMI : KM_IRQ0;
+ unsigned long size, len = 0;
+ struct page *page;
+ void *map;
+ int ret;
-/* The size of a BTS record in bytes: */
-#define BTS_RECORD_SIZE 24
+ do {
+ ret = __get_user_pages_fast(addr, 1, 0, &page);
+ if (!ret)
+ break;
-/* The size of a per-cpu BTS buffer in bytes: */
-#define BTS_BUFFER_SIZE (BTS_RECORD_SIZE * 2048)
+ offset = addr & (PAGE_SIZE - 1);
+ size = min(PAGE_SIZE - offset, n - len);
-/* The BTS overflow threshold in bytes from the end of the buffer: */
-#define BTS_OVFL_TH (BTS_RECORD_SIZE * 128)
+ map = kmap_atomic(page, type);
+ memcpy(to, map+offset, size);
+ kunmap_atomic(map, type);
+ put_page(page);
+ len += size;
+ to += size;
+ addr += size;
-/*
- * Bits in the debugctlmsr controlling branch tracing.
- */
-#define X86_DEBUGCTL_TR (1 << 6)
-#define X86_DEBUGCTL_BTS (1 << 7)
-#define X86_DEBUGCTL_BTINT (1 << 8)
-#define X86_DEBUGCTL_BTS_OFF_OS (1 << 9)
-#define X86_DEBUGCTL_BTS_OFF_USR (1 << 10)
+ } while (len < n);
-/*
- * A debug store configuration.
- *
- * We only support architectures that use 64bit fields.
- */
-struct debug_store {
- u64 bts_buffer_base;
- u64 bts_index;
- u64 bts_absolute_maximum;
- u64 bts_interrupt_threshold;
- u64 pebs_buffer_base;
- u64 pebs_index;
- u64 pebs_absolute_maximum;
- u64 pebs_interrupt_threshold;
- u64 pebs_event_reset[MAX_PEBS_EVENTS];
-};
+ return len;
+}
struct event_constraint {
union {
@@ -89,18 +94,39 @@ struct amd_nb {
struct event_constraint event_constraints[X86_PMC_IDX_MAX];
};
+#define MAX_LBR_ENTRIES 16
+
struct cpu_hw_events {
+ /*
+ * Generic x86 PMC bits
+ */
struct perf_event *events[X86_PMC_IDX_MAX]; /* in counter order */
unsigned long active_mask[BITS_TO_LONGS(X86_PMC_IDX_MAX)];
- unsigned long interrupts;
int enabled;
- struct debug_store *ds;
int n_events;
int n_added;
int assign[X86_PMC_IDX_MAX]; /* event to counter assignment */
u64 tags[X86_PMC_IDX_MAX];
struct perf_event *event_list[X86_PMC_IDX_MAX]; /* in enabled order */
+
+ /*
+ * Intel DebugStore bits
+ */
+ struct debug_store *ds;
+ u64 pebs_enabled;
+
+ /*
+ * Intel LBR bits
+ */
+ int lbr_users;
+ void *lbr_context;
+ struct perf_branch_stack lbr_stack;
+ struct perf_branch_entry lbr_entries[MAX_LBR_ENTRIES];
+
+ /*
+ * AMD specific bits
+ */
struct amd_nb *amd_nb;
};
@@ -114,11 +140,31 @@ struct cpu_hw_events {
#define EVENT_CONSTRAINT(c, n, m) \
__EVENT_CONSTRAINT(c, n, m, HWEIGHT(n))
+/*
+ * Constraint on the Event code.
+ */
#define INTEL_EVENT_CONSTRAINT(c, n) \
- EVENT_CONSTRAINT(c, n, INTEL_ARCH_EVTSEL_MASK)
+ EVENT_CONSTRAINT(c, n, ARCH_PERFMON_EVENTSEL_EVENT)
+/*
+ * Constraint on the Event code + UMask + fixed-mask
+ *
+ * filter mask to validate fixed counter events.
+ * the following filters disqualify for fixed counters:
+ * - inv
+ * - edge
+ * - cnt-mask
+ * The other filters are supported by fixed counters.
+ * The any-thread option is supported starting with v3.
+ */
#define FIXED_EVENT_CONSTRAINT(c, n) \
- EVENT_CONSTRAINT(c, (1ULL << (32+n)), INTEL_ARCH_FIXED_MASK)
+ EVENT_CONSTRAINT(c, (1ULL << (32+n)), X86_RAW_EVENT_MASK)
+
+/*
+ * Constraint on the Event code + UMask
+ */
+#define PEBS_EVENT_CONSTRAINT(c, n) \
+ EVENT_CONSTRAINT(c, n, INTEL_ARCH_EVENT_MASK)
#define EVENT_CONSTRAINT_END \
EVENT_CONSTRAINT(0, 0, 0)
@@ -126,32 +172,43 @@ struct cpu_hw_events {
#define for_each_event_constraint(e, c) \
for ((e) = (c); (e)->cmask; (e)++)
+union perf_capabilities {
+ struct {
+ u64 lbr_format : 6;
+ u64 pebs_trap : 1;
+ u64 pebs_arch_reg : 1;
+ u64 pebs_format : 4;
+ u64 smm_freeze : 1;
+ };
+ u64 capabilities;
+};
+
/*
* struct x86_pmu - generic x86 pmu
*/
struct x86_pmu {
+ /*
+ * Generic x86 PMC bits
+ */
const char *name;
int version;
int (*handle_irq)(struct pt_regs *);
void (*disable_all)(void);
- void (*enable_all)(void);
+ void (*enable_all)(int added);
void (*enable)(struct perf_event *);
void (*disable)(struct perf_event *);
+ int (*hw_config)(struct perf_event *event);
+ int (*schedule_events)(struct cpu_hw_events *cpuc, int n, int *assign);
unsigned eventsel;
unsigned perfctr;
u64 (*event_map)(int);
- u64 (*raw_event)(u64);
int max_events;
- int num_events;
- int num_events_fixed;
- int event_bits;
- u64 event_mask;
+ int num_counters;
+ int num_counters_fixed;
+ int cntval_bits;
+ u64 cntval_mask;
int apic;
u64 max_period;
- u64 intel_ctrl;
- void (*enable_bts)(u64 config);
- void (*disable_bts)(void);
-
struct event_constraint *
(*get_event_constraints)(struct cpu_hw_events *cpuc,
struct perf_event *event);
@@ -159,11 +216,32 @@ struct x86_pmu {
void (*put_event_constraints)(struct cpu_hw_events *cpuc,
struct perf_event *event);
struct event_constraint *event_constraints;
+ void (*quirks)(void);
int (*cpu_prepare)(int cpu);
void (*cpu_starting)(int cpu);
void (*cpu_dying)(int cpu);
void (*cpu_dead)(int cpu);
+
+ /*
+ * Intel Arch Perfmon v2+
+ */
+ u64 intel_ctrl;
+ union perf_capabilities intel_cap;
+
+ /*
+ * Intel DebugStore bits
+ */
+ int bts, pebs;
+ int pebs_record_size;
+ void (*drain_pebs)(struct pt_regs *regs);
+ struct event_constraint *pebs_constraints;
+
+ /*
+ * Intel LBR
+ */
+ unsigned long lbr_tos, lbr_from, lbr_to; /* MSR base regs */
+ int lbr_nr; /* hardware stack size */
};
static struct x86_pmu x86_pmu __read_mostly;
@@ -198,7 +276,7 @@ static u64
x86_perf_event_update(struct perf_event *event)
{
struct hw_perf_event *hwc = &event->hw;
- int shift = 64 - x86_pmu.event_bits;
+ int shift = 64 - x86_pmu.cntval_bits;
u64 prev_raw_count, new_raw_count;
int idx = hwc->idx;
s64 delta;
@@ -241,33 +319,32 @@ again:
static atomic_t active_events;
static DEFINE_MUTEX(pmc_reserve_mutex);
+#ifdef CONFIG_X86_LOCAL_APIC
+
static bool reserve_pmc_hardware(void)
{
-#ifdef CONFIG_X86_LOCAL_APIC
int i;
if (nmi_watchdog == NMI_LOCAL_APIC)
disable_lapic_nmi_watchdog();
- for (i = 0; i < x86_pmu.num_events; i++) {
+ for (i = 0; i < x86_pmu.num_counters; i++) {
if (!reserve_perfctr_nmi(x86_pmu.perfctr + i))
goto perfctr_fail;
}
- for (i = 0; i < x86_pmu.num_events; i++) {
+ for (i = 0; i < x86_pmu.num_counters; i++) {
if (!reserve_evntsel_nmi(x86_pmu.eventsel + i))
goto eventsel_fail;
}
-#endif
return true;
-#ifdef CONFIG_X86_LOCAL_APIC
eventsel_fail:
for (i--; i >= 0; i--)
release_evntsel_nmi(x86_pmu.eventsel + i);
- i = x86_pmu.num_events;
+ i = x86_pmu.num_counters;
perfctr_fail:
for (i--; i >= 0; i--)
@@ -277,128 +354,36 @@ perfctr_fail:
enable_lapic_nmi_watchdog();
return false;
-#endif
}
static void release_pmc_hardware(void)
{
-#ifdef CONFIG_X86_LOCAL_APIC
int i;
- for (i = 0; i < x86_pmu.num_events; i++) {
+ for (i = 0; i < x86_pmu.num_counters; i++) {
release_perfctr_nmi(x86_pmu.perfctr + i);
release_evntsel_nmi(x86_pmu.eventsel + i);
}
if (nmi_watchdog == NMI_LOCAL_APIC)
enable_lapic_nmi_watchdog();
-#endif
-}
-
-static inline bool bts_available(void)
-{
- return x86_pmu.enable_bts != NULL;
-}
-
-static void init_debug_store_on_cpu(int cpu)
-{
- struct debug_store *ds = per_cpu(cpu_hw_events, cpu).ds;
-
- if (!ds)
- return;
-
- wrmsr_on_cpu(cpu, MSR_IA32_DS_AREA,
- (u32)((u64)(unsigned long)ds),
- (u32)((u64)(unsigned long)ds >> 32));
-}
-
-static void fini_debug_store_on_cpu(int cpu)
-{
- if (!per_cpu(cpu_hw_events, cpu).ds)
- return;
-
- wrmsr_on_cpu(cpu, MSR_IA32_DS_AREA, 0, 0);
-}
-
-static void release_bts_hardware(void)
-{
- int cpu;
-
- if (!bts_available())
- return;
-
- get_online_cpus();
-
- for_each_online_cpu(cpu)
- fini_debug_store_on_cpu(cpu);
-
- for_each_possible_cpu(cpu) {
- struct debug_store *ds = per_cpu(cpu_hw_events, cpu).ds;
-
- if (!ds)
- continue;
-
- per_cpu(cpu_hw_events, cpu).ds = NULL;
-
- kfree((void *)(unsigned long)ds->bts_buffer_base);
- kfree(ds);
- }
-
- put_online_cpus();
}
-static int reserve_bts_hardware(void)
-{
- int cpu, err = 0;
-
- if (!bts_available())
- return 0;
-
- get_online_cpus();
-
- for_each_possible_cpu(cpu) {
- struct debug_store *ds;
- void *buffer;
-
- err = -ENOMEM;
- buffer = kzalloc(BTS_BUFFER_SIZE, GFP_KERNEL);
- if (unlikely(!buffer))
- break;
-
- ds = kzalloc(sizeof(*ds), GFP_KERNEL);
- if (unlikely(!ds)) {
- kfree(buffer);
- break;
- }
-
- ds->bts_buffer_base = (u64)(unsigned long)buffer;
- ds->bts_index = ds->bts_buffer_base;
- ds->bts_absolute_maximum =
- ds->bts_buffer_base + BTS_BUFFER_SIZE;
- ds->bts_interrupt_threshold =
- ds->bts_absolute_maximum - BTS_OVFL_TH;
+#else
- per_cpu(cpu_hw_events, cpu).ds = ds;
- err = 0;
- }
+static bool reserve_pmc_hardware(void) { return true; }
+static void release_pmc_hardware(void) {}
- if (err)
- release_bts_hardware();
- else {
- for_each_online_cpu(cpu)
- init_debug_store_on_cpu(cpu);
- }
-
- put_online_cpus();
+#endif
- return err;
-}
+static int reserve_ds_buffers(void);
+static void release_ds_buffers(void);
static void hw_perf_event_destroy(struct perf_event *event)
{
if (atomic_dec_and_mutex_lock(&active_events, &pmc_reserve_mutex)) {
release_pmc_hardware();
- release_bts_hardware();
+ release_ds_buffers();
mutex_unlock(&pmc_reserve_mutex);
}
}
@@ -441,6 +426,28 @@ set_ext_hw_attr(struct hw_perf_event *hwc, struct perf_event_attr *attr)
return 0;
}
+static int x86_pmu_hw_config(struct perf_event *event)
+{
+ /*
+ * Generate PMC IRQs:
+ * (keep 'enabled' bit clear for now)
+ */
+ event->hw.config = ARCH_PERFMON_EVENTSEL_INT;
+
+ /*
+ * Count user and OS events unless requested not to
+ */
+ if (!event->attr.exclude_user)
+ event->hw.config |= ARCH_PERFMON_EVENTSEL_USR;
+ if (!event->attr.exclude_kernel)
+ event->hw.config |= ARCH_PERFMON_EVENTSEL_OS;
+
+ if (event->attr.type == PERF_TYPE_RAW)
+ event->hw.config |= event->attr.config & X86_RAW_EVENT_MASK;
+
+ return 0;
+}
+
/*
* Setup the hardware configuration for a given attr_type
*/
@@ -460,8 +467,11 @@ static int __hw_perf_event_init(struct perf_event *event)
if (atomic_read(&active_events) == 0) {
if (!reserve_pmc_hardware())
err = -EBUSY;
- else
- err = reserve_bts_hardware();
+ else {
+ err = reserve_ds_buffers();
+ if (err)
+ release_pmc_hardware();
+ }
}
if (!err)
atomic_inc(&active_events);
@@ -472,23 +482,14 @@ static int __hw_perf_event_init(struct perf_event *event)
event->destroy = hw_perf_event_destroy;
- /*
- * Generate PMC IRQs:
- * (keep 'enabled' bit clear for now)
- */
- hwc->config = ARCH_PERFMON_EVENTSEL_INT;
-
hwc->idx = -1;
hwc->last_cpu = -1;
hwc->last_tag = ~0ULL;
- /*
- * Count user and OS events unless requested not to.
- */
- if (!attr->exclude_user)
- hwc->config |= ARCH_PERFMON_EVENTSEL_USR;
- if (!attr->exclude_kernel)
- hwc->config |= ARCH_PERFMON_EVENTSEL_OS;
+ /* Processor specifics */
+ err = x86_pmu.hw_config(event);
+ if (err)
+ return err;
if (!hwc->sample_period) {
hwc->sample_period = x86_pmu.max_period;
@@ -505,16 +506,8 @@ static int __hw_perf_event_init(struct perf_event *event)
return -EOPNOTSUPP;
}
- /*
- * Raw hw_event type provide the config in the hw_event structure
- */
- if (attr->type == PERF_TYPE_RAW) {
- hwc->config |= x86_pmu.raw_event(attr->config);
- if ((hwc->config & ARCH_PERFMON_EVENTSEL_ANY) &&
- perf_paranoid_cpu() && !capable(CAP_SYS_ADMIN))
- return -EACCES;
+ if (attr->type == PERF_TYPE_RAW)
return 0;
- }
if (attr->type == PERF_TYPE_HW_CACHE)
return set_ext_hw_attr(hwc, attr);
@@ -539,11 +532,11 @@ static int __hw_perf_event_init(struct perf_event *event)
if ((attr->config == PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
(hwc->sample_period == 1)) {
/* BTS is not supported by this architecture. */
- if (!bts_available())
+ if (!x86_pmu.bts)
return -EOPNOTSUPP;
/* BTS is currently only allowed for user-mode. */
- if (hwc->config & ARCH_PERFMON_EVENTSEL_OS)
+ if (!attr->exclude_kernel)
return -EOPNOTSUPP;
}
@@ -557,7 +550,7 @@ static void x86_pmu_disable_all(void)
struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
int idx;
- for (idx = 0; idx < x86_pmu.num_events; idx++) {
+ for (idx = 0; idx < x86_pmu.num_counters; idx++) {
u64 val;
if (!test_bit(idx, cpuc->active_mask))
@@ -587,12 +580,12 @@ void hw_perf_disable(void)
x86_pmu.disable_all();
}
-static void x86_pmu_enable_all(void)
+static void x86_pmu_enable_all(int added)
{
struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
int idx;
- for (idx = 0; idx < x86_pmu.num_events; idx++) {
+ for (idx = 0; idx < x86_pmu.num_counters; idx++) {
struct perf_event *event = cpuc->events[idx];
u64 val;
@@ -667,14 +660,14 @@ static int x86_schedule_events(struct cpu_hw_events *cpuc, int n, int *assign)
* assign events to counters starting with most
* constrained events.
*/
- wmax = x86_pmu.num_events;
+ wmax = x86_pmu.num_counters;
/*
* when fixed event counters are present,
* wmax is incremented by 1 to account
* for one more choice
*/
- if (x86_pmu.num_events_fixed)
+ if (x86_pmu.num_counters_fixed)
wmax++;
for (w = 1, num = n; num && w <= wmax; w++) {
@@ -724,7 +717,7 @@ static int collect_events(struct cpu_hw_events *cpuc, struct perf_event *leader,
struct perf_event *event;
int n, max_count;
- max_count = x86_pmu.num_events + x86_pmu.num_events_fixed;
+ max_count = x86_pmu.num_counters + x86_pmu.num_counters_fixed;
/* current number of events already accepted */
n = cpuc->n_events;
@@ -795,7 +788,7 @@ void hw_perf_enable(void)
struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
struct perf_event *event;
struct hw_perf_event *hwc;
- int i;
+ int i, added = cpuc->n_added;
if (!x86_pmu_initialized())
return;
@@ -847,19 +840,20 @@ void hw_perf_enable(void)
cpuc->enabled = 1;
barrier();
- x86_pmu.enable_all();
+ x86_pmu.enable_all(added);
}
static inline void __x86_pmu_enable_event(struct hw_perf_event *hwc)
{
- (void)checking_wrmsrl(hwc->config_base + hwc->idx,
+ wrmsrl(hwc->config_base + hwc->idx,
hwc->config | ARCH_PERFMON_EVENTSEL_ENABLE);
}
static inline void x86_pmu_disable_event(struct perf_event *event)
{
struct hw_perf_event *hwc = &event->hw;
- (void)checking_wrmsrl(hwc->config_base + hwc->idx, hwc->config);
+
+ wrmsrl(hwc->config_base + hwc->idx, hwc->config);
}
static DEFINE_PER_CPU(u64 [X86_PMC_IDX_MAX], pmc_prev_left);
@@ -874,7 +868,7 @@ x86_perf_event_set_period(struct perf_event *event)
struct hw_perf_event *hwc = &event->hw;
s64 left = atomic64_read(&hwc->period_left);
s64 period = hwc->sample_period;
- int err, ret = 0, idx = hwc->idx;
+ int ret = 0, idx = hwc->idx;
if (idx == X86_PMC_IDX_FIXED_BTS)
return 0;
@@ -912,8 +906,8 @@ x86_perf_event_set_period(struct perf_event *event)
*/
atomic64_set(&hwc->prev_count, (u64)-left);
- err = checking_wrmsrl(hwc->event_base + idx,
- (u64)(-left) & x86_pmu.event_mask);
+ wrmsrl(hwc->event_base + idx,
+ (u64)(-left) & x86_pmu.cntval_mask);
perf_event_update_userpage(event);
@@ -950,7 +944,7 @@ static int x86_pmu_enable(struct perf_event *event)
if (n < 0)
return n;
- ret = x86_schedule_events(cpuc, n, assign);
+ ret = x86_pmu.schedule_events(cpuc, n, assign);
if (ret)
return ret;
/*
@@ -991,11 +985,12 @@ static void x86_pmu_unthrottle(struct perf_event *event)
void perf_event_print_debug(void)
{
u64 ctrl, status, overflow, pmc_ctrl, pmc_count, prev_left, fixed;
+ u64 pebs;
struct cpu_hw_events *cpuc;
unsigned long flags;
int cpu, idx;
- if (!x86_pmu.num_events)
+ if (!x86_pmu.num_counters)
return;
local_irq_save(flags);
@@ -1008,16 +1003,18 @@ void perf_event_print_debug(void)
rdmsrl(MSR_CORE_PERF_GLOBAL_STATUS, status);
rdmsrl(MSR_CORE_PERF_GLOBAL_OVF_CTRL, overflow);
rdmsrl(MSR_ARCH_PERFMON_FIXED_CTR_CTRL, fixed);
+ rdmsrl(MSR_IA32_PEBS_ENABLE, pebs);
pr_info("\n");
pr_info("CPU#%d: ctrl: %016llx\n", cpu, ctrl);
pr_info("CPU#%d: status: %016llx\n", cpu, status);
pr_info("CPU#%d: overflow: %016llx\n", cpu, overflow);
pr_info("CPU#%d: fixed: %016llx\n", cpu, fixed);
+ pr_info("CPU#%d: pebs: %016llx\n", cpu, pebs);
}
- pr_info("CPU#%d: active: %016llx\n", cpu, *(u64 *)cpuc->active_mask);
+ pr_info("CPU#%d: active: %016llx\n", cpu, *(u64 *)cpuc->active_mask);
- for (idx = 0; idx < x86_pmu.num_events; idx++) {
+ for (idx = 0; idx < x86_pmu.num_counters; idx++) {
rdmsrl(x86_pmu.eventsel + idx, pmc_ctrl);
rdmsrl(x86_pmu.perfctr + idx, pmc_count);
@@ -1030,7 +1027,7 @@ void perf_event_print_debug(void)
pr_info("CPU#%d: gen-PMC%d left: %016llx\n",
cpu, idx, prev_left);
}
- for (idx = 0; idx < x86_pmu.num_events_fixed; idx++) {
+ for (idx = 0; idx < x86_pmu.num_counters_fixed; idx++) {
rdmsrl(MSR_ARCH_PERFMON_FIXED_CTR0 + idx, pmc_count);
pr_info("CPU#%d: fixed-PMC%d count: %016llx\n",
@@ -1095,7 +1092,7 @@ static int x86_pmu_handle_irq(struct pt_regs *regs)
cpuc = &__get_cpu_var(cpu_hw_events);
- for (idx = 0; idx < x86_pmu.num_events; idx++) {
+ for (idx = 0; idx < x86_pmu.num_counters; idx++) {
if (!test_bit(idx, cpuc->active_mask))
continue;
@@ -1103,7 +1100,7 @@ static int x86_pmu_handle_irq(struct pt_regs *regs)
hwc = &event->hw;
val = x86_perf_event_update(event);
- if (val & (1ULL << (x86_pmu.event_bits - 1)))
+ if (val & (1ULL << (x86_pmu.cntval_bits - 1)))
continue;
/*
@@ -1146,7 +1143,6 @@ void set_perf_event_pending(void)
void perf_events_lapic_init(void)
{
-#ifdef CONFIG_X86_LOCAL_APIC
if (!x86_pmu.apic || !x86_pmu_initialized())
return;
@@ -1154,7 +1150,6 @@ void perf_events_lapic_init(void)
* Always use NMI for PMU
*/
apic_write(APIC_LVTPC, APIC_DM_NMI);
-#endif
}
static int __kprobes
@@ -1178,9 +1173,7 @@ perf_event_nmi_handler(struct notifier_block *self,
regs = args->regs;
-#ifdef CONFIG_X86_LOCAL_APIC
apic_write(APIC_LVTPC, APIC_DM_NMI);
-#endif
/*
* Can't rely on the handled return value to say it was our NMI, two
* events could trigger 'simultaneously' raising two back-to-back NMIs.
@@ -1274,12 +1267,15 @@ int hw_perf_group_sched_in(struct perf_event *leader,
int assign[X86_PMC_IDX_MAX];
int n0, n1, ret;
+ if (!x86_pmu_initialized())
+ return 0;
+
/* n0 = total number of events */
n0 = collect_events(cpuc, leader, true);
if (n0 < 0)
return n0;
- ret = x86_schedule_events(cpuc, n0, assign);
+ ret = x86_pmu.schedule_events(cpuc, n0, assign);
if (ret)
return ret;
@@ -1329,6 +1325,9 @@ undo:
#include "perf_event_amd.c"
#include "perf_event_p6.c"
+#include "perf_event_p4.c"
+#include "perf_event_intel_lbr.c"
+#include "perf_event_intel_ds.c"
#include "perf_event_intel.c"
static int __cpuinit
@@ -1402,48 +1401,50 @@ void __init init_hw_perf_events(void)
pr_cont("%s PMU driver.\n", x86_pmu.name);
- if (x86_pmu.num_events > X86_PMC_MAX_GENERIC) {
+ if (x86_pmu.quirks)
+ x86_pmu.quirks();
+
+ if (x86_pmu.num_counters > X86_PMC_MAX_GENERIC) {
WARN(1, KERN_ERR "hw perf events %d > max(%d), clipping!",
- x86_pmu.num_events, X86_PMC_MAX_GENERIC);
- x86_pmu.num_events = X86_PMC_MAX_GENERIC;
+ x86_pmu.num_counters, X86_PMC_MAX_GENERIC);
+ x86_pmu.num_counters = X86_PMC_MAX_GENERIC;
}
- perf_event_mask = (1 << x86_pmu.num_events) - 1;
- perf_max_events = x86_pmu.num_events;
+ x86_pmu.intel_ctrl = (1 << x86_pmu.num_counters) - 1;
+ perf_max_events = x86_pmu.num_counters;
- if (x86_pmu.num_events_fixed > X86_PMC_MAX_FIXED) {
+ if (x86_pmu.num_counters_fixed > X86_PMC_MAX_FIXED) {
WARN(1, KERN_ERR "hw perf events fixed %d > max(%d), clipping!",
- x86_pmu.num_events_fixed, X86_PMC_MAX_FIXED);
- x86_pmu.num_events_fixed = X86_PMC_MAX_FIXED;
+ x86_pmu.num_counters_fixed, X86_PMC_MAX_FIXED);
+ x86_pmu.num_counters_fixed = X86_PMC_MAX_FIXED;
}
- perf_event_mask |=
- ((1LL << x86_pmu.num_events_fixed)-1) << X86_PMC_IDX_FIXED;
- x86_pmu.intel_ctrl = perf_event_mask;
+ x86_pmu.intel_ctrl |=
+ ((1LL << x86_pmu.num_counters_fixed)-1) << X86_PMC_IDX_FIXED;
perf_events_lapic_init();
register_die_notifier(&perf_event_nmi_notifier);
unconstrained = (struct event_constraint)
- __EVENT_CONSTRAINT(0, (1ULL << x86_pmu.num_events) - 1,
- 0, x86_pmu.num_events);
+ __EVENT_CONSTRAINT(0, (1ULL << x86_pmu.num_counters) - 1,
+ 0, x86_pmu.num_counters);
if (x86_pmu.event_constraints) {
for_each_event_constraint(c, x86_pmu.event_constraints) {
- if (c->cmask != INTEL_ARCH_FIXED_MASK)
+ if (c->cmask != X86_RAW_EVENT_MASK)
continue;
- c->idxmsk64 |= (1ULL << x86_pmu.num_events) - 1;
- c->weight += x86_pmu.num_events;
+ c->idxmsk64 |= (1ULL << x86_pmu.num_counters) - 1;
+ c->weight += x86_pmu.num_counters;
}
}
pr_info("... version: %d\n", x86_pmu.version);
- pr_info("... bit width: %d\n", x86_pmu.event_bits);
- pr_info("... generic registers: %d\n", x86_pmu.num_events);
- pr_info("... value mask: %016Lx\n", x86_pmu.event_mask);
+ pr_info("... bit width: %d\n", x86_pmu.cntval_bits);
+ pr_info("... generic registers: %d\n", x86_pmu.num_counters);
+ pr_info("... value mask: %016Lx\n", x86_pmu.cntval_mask);
pr_info("... max period: %016Lx\n", x86_pmu.max_period);
- pr_info("... fixed-purpose events: %d\n", x86_pmu.num_events_fixed);
- pr_info("... event mask: %016Lx\n", perf_event_mask);
+ pr_info("... fixed-purpose events: %d\n", x86_pmu.num_counters_fixed);
+ pr_info("... event mask: %016Lx\n", x86_pmu.intel_ctrl);
perf_cpu_notifier(x86_pmu_notifier);
}
@@ -1463,6 +1464,32 @@ static const struct pmu pmu = {
};
/*
+ * validate that we can schedule this event
+ */
+static int validate_event(struct perf_event *event)
+{
+ struct cpu_hw_events *fake_cpuc;
+ struct event_constraint *c;
+ int ret = 0;
+
+ fake_cpuc = kmalloc(sizeof(*fake_cpuc), GFP_KERNEL | __GFP_ZERO);
+ if (!fake_cpuc)
+ return -ENOMEM;
+
+ c = x86_pmu.get_event_constraints(fake_cpuc, event);
+
+ if (!c || !c->weight)
+ ret = -ENOSPC;
+
+ if (x86_pmu.put_event_constraints)
+ x86_pmu.put_event_constraints(fake_cpuc, event);
+
+ kfree(fake_cpuc);
+
+ return ret;
+}
+
+/*
* validate a single event group
*
* validation include:
@@ -1502,7 +1529,7 @@ static int validate_group(struct perf_event *event)
fake_cpuc->n_events = n;
- ret = x86_schedule_events(fake_cpuc, n, NULL);
+ ret = x86_pmu.schedule_events(fake_cpuc, n, NULL);
out_free:
kfree(fake_cpuc);
@@ -1527,6 +1554,8 @@ const struct pmu *hw_perf_event_init(struct perf_event *event)
if (event->group_leader != event)
err = validate_group(event);
+ else
+ err = validate_event(event);
event->pmu = tmp;
}
@@ -1574,8 +1603,7 @@ static void backtrace_address(void *data, unsigned long addr, int reliable)
{
struct perf_callchain_entry *entry = data;
- if (reliable)
- callchain_store(entry, addr);
+ callchain_store(entry, addr);
}
static const struct stacktrace_ops backtrace_ops = {
@@ -1597,41 +1625,6 @@ perf_callchain_kernel(struct pt_regs *regs, struct perf_callchain_entry *entry)
dump_trace(NULL, regs, NULL, regs->bp, &backtrace_ops, entry);
}
-/*
- * best effort, GUP based copy_from_user() that assumes IRQ or NMI context
- */
-static unsigned long
-copy_from_user_nmi(void *to, const void __user *from, unsigned long n)
-{
- unsigned long offset, addr = (unsigned long)from;
- int type = in_nmi() ? KM_NMI : KM_IRQ0;
- unsigned long size, len = 0;
- struct page *page;
- void *map;
- int ret;
-
- do {
- ret = __get_user_pages_fast(addr, 1, 0, &page);
- if (!ret)
- break;
-
- offset = addr & (PAGE_SIZE - 1);
- size = min(PAGE_SIZE - offset, n - len);
-
- map = kmap_atomic(page, type);
- memcpy(to, map+offset, size);
- kunmap_atomic(map, type);
- put_page(page);
-
- len += size;
- to += size;
- addr += size;
-
- } while (len < n);
-
- return len;
-}
-
#ifdef CONFIG_COMPAT
static inline int
perf_callchain_user32(struct pt_regs *regs, struct perf_callchain_entry *entry)
@@ -1727,6 +1720,11 @@ struct perf_callchain_entry *perf_callchain(struct pt_regs *regs)
{
struct perf_callchain_entry *entry;
+ if (perf_guest_cbs && perf_guest_cbs->is_in_guest()) {
+ /* TODO: We don't support guest os callchain now */
+ return NULL;
+ }
+
if (in_nmi())
entry = &__get_cpu_var(pmc_nmi_entry);
else
@@ -1750,3 +1748,29 @@ void perf_arch_fetch_caller_regs(struct pt_regs *regs, unsigned long ip, int ski
regs->cs = __KERNEL_CS;
local_save_flags(regs->flags);
}
+
+unsigned long perf_instruction_pointer(struct pt_regs *regs)
+{
+ unsigned long ip;
+ if (perf_guest_cbs && perf_guest_cbs->is_in_guest())
+ ip = perf_guest_cbs->get_guest_ip();
+ else
+ ip = instruction_pointer(regs);
+ return ip;
+}
+
+unsigned long perf_misc_flags(struct pt_regs *regs)
+{
+ int misc = 0;
+ if (perf_guest_cbs && perf_guest_cbs->is_in_guest()) {
+ misc |= perf_guest_cbs->is_user_mode() ?
+ PERF_RECORD_MISC_GUEST_USER :
+ PERF_RECORD_MISC_GUEST_KERNEL;
+ } else
+ misc |= user_mode(regs) ? PERF_RECORD_MISC_USER :
+ PERF_RECORD_MISC_KERNEL;
+ if (regs->flags & PERF_EFLAGS_EXACT)
+ misc |= PERF_RECORD_MISC_EXACT;
+
+ return misc;
+}
diff --git a/arch/x86/kernel/cpu/perf_event_amd.c b/arch/x86/kernel/cpu/perf_event_amd.c
index db6f7d4..611df11 100644
--- a/arch/x86/kernel/cpu/perf_event_amd.c
+++ b/arch/x86/kernel/cpu/perf_event_amd.c
@@ -2,7 +2,7 @@
static DEFINE_RAW_SPINLOCK(amd_nb_lock);
-static __initconst u64 amd_hw_cache_event_ids
+static __initconst const u64 amd_hw_cache_event_ids
[PERF_COUNT_HW_CACHE_MAX]
[PERF_COUNT_HW_CACHE_OP_MAX]
[PERF_COUNT_HW_CACHE_RESULT_MAX] =
@@ -111,22 +111,19 @@ static u64 amd_pmu_event_map(int hw_event)
return amd_perfmon_event_map[hw_event];
}
-static u64 amd_pmu_raw_event(u64 hw_event)
+static int amd_pmu_hw_config(struct perf_event *event)
{
-#define K7_EVNTSEL_EVENT_MASK 0xF000000FFULL
-#define K7_EVNTSEL_UNIT_MASK 0x00000FF00ULL
-#define K7_EVNTSEL_EDGE_MASK 0x000040000ULL
-#define K7_EVNTSEL_INV_MASK 0x000800000ULL
-#define K7_EVNTSEL_REG_MASK 0x0FF000000ULL
-
-#define K7_EVNTSEL_MASK \
- (K7_EVNTSEL_EVENT_MASK | \
- K7_EVNTSEL_UNIT_MASK | \
- K7_EVNTSEL_EDGE_MASK | \
- K7_EVNTSEL_INV_MASK | \
- K7_EVNTSEL_REG_MASK)
-
- return hw_event & K7_EVNTSEL_MASK;
+ int ret = x86_pmu_hw_config(event);
+
+ if (ret)
+ return ret;
+
+ if (event->attr.type != PERF_TYPE_RAW)
+ return 0;
+
+ event->hw.config |= event->attr.config & AMD64_RAW_EVENT_MASK;
+
+ return 0;
}
/*
@@ -165,7 +162,7 @@ static void amd_put_event_constraints(struct cpu_hw_events *cpuc,
* be removed on one CPU at a time AND PMU is disabled
* when we come here
*/
- for (i = 0; i < x86_pmu.num_events; i++) {
+ for (i = 0; i < x86_pmu.num_counters; i++) {
if (nb->owners[i] == event) {
cmpxchg(nb->owners+i, event, NULL);
break;
@@ -215,7 +212,7 @@ amd_get_event_constraints(struct cpu_hw_events *cpuc, struct perf_event *event)
struct hw_perf_event *hwc = &event->hw;
struct amd_nb *nb = cpuc->amd_nb;
struct perf_event *old = NULL;
- int max = x86_pmu.num_events;
+ int max = x86_pmu.num_counters;
int i, j, k = -1;
/*
@@ -293,7 +290,7 @@ static struct amd_nb *amd_alloc_nb(int cpu, int nb_id)
/*
* initialize all possible NB constraints
*/
- for (i = 0; i < x86_pmu.num_events; i++) {
+ for (i = 0; i < x86_pmu.num_counters; i++) {
__set_bit(i, nb->event_constraints[i].idxmsk);
nb->event_constraints[i].weight = 1;
}
@@ -371,21 +368,22 @@ static void amd_pmu_cpu_dead(int cpu)
raw_spin_unlock(&amd_nb_lock);
}
-static __initconst struct x86_pmu amd_pmu = {
+static __initconst const struct x86_pmu amd_pmu = {
.name = "AMD",
.handle_irq = x86_pmu_handle_irq,
.disable_all = x86_pmu_disable_all,
.enable_all = x86_pmu_enable_all,
.enable = x86_pmu_enable_event,
.disable = x86_pmu_disable_event,
+ .hw_config = amd_pmu_hw_config,
+ .schedule_events = x86_schedule_events,
.eventsel = MSR_K7_EVNTSEL0,
.perfctr = MSR_K7_PERFCTR0,
.event_map = amd_pmu_event_map,
- .raw_event = amd_pmu_raw_event,
.max_events = ARRAY_SIZE(amd_perfmon_event_map),
- .num_events = 4,
- .event_bits = 48,
- .event_mask = (1ULL << 48) - 1,
+ .num_counters = 4,
+ .cntval_bits = 48,
+ .cntval_mask = (1ULL << 48) - 1,
.apic = 1,
/* use highest bit to detect overflow */
.max_period = (1ULL << 47) - 1,
diff --git a/arch/x86/kernel/cpu/perf_event_intel.c b/arch/x86/kernel/cpu/perf_event_intel.c
index 9c794ac..a099df9 100644
--- a/arch/x86/kernel/cpu/perf_event_intel.c
+++ b/arch/x86/kernel/cpu/perf_event_intel.c
@@ -88,7 +88,7 @@ static u64 intel_pmu_event_map(int hw_event)
return intel_perfmon_event_map[hw_event];
}
-static __initconst u64 westmere_hw_cache_event_ids
+static __initconst const u64 westmere_hw_cache_event_ids
[PERF_COUNT_HW_CACHE_MAX]
[PERF_COUNT_HW_CACHE_OP_MAX]
[PERF_COUNT_HW_CACHE_RESULT_MAX] =
@@ -179,7 +179,7 @@ static __initconst u64 westmere_hw_cache_event_ids
},
};
-static __initconst u64 nehalem_hw_cache_event_ids
+static __initconst const u64 nehalem_hw_cache_event_ids
[PERF_COUNT_HW_CACHE_MAX]
[PERF_COUNT_HW_CACHE_OP_MAX]
[PERF_COUNT_HW_CACHE_RESULT_MAX] =
@@ -270,7 +270,7 @@ static __initconst u64 nehalem_hw_cache_event_ids
},
};
-static __initconst u64 core2_hw_cache_event_ids
+static __initconst const u64 core2_hw_cache_event_ids
[PERF_COUNT_HW_CACHE_MAX]
[PERF_COUNT_HW_CACHE_OP_MAX]
[PERF_COUNT_HW_CACHE_RESULT_MAX] =
@@ -361,7 +361,7 @@ static __initconst u64 core2_hw_cache_event_ids
},
};
-static __initconst u64 atom_hw_cache_event_ids
+static __initconst const u64 atom_hw_cache_event_ids
[PERF_COUNT_HW_CACHE_MAX]
[PERF_COUNT_HW_CACHE_OP_MAX]
[PERF_COUNT_HW_CACHE_RESULT_MAX] =
@@ -452,60 +452,6 @@ static __initconst u64 atom_hw_cache_event_ids
},
};
-static u64 intel_pmu_raw_event(u64 hw_event)
-{
-#define CORE_EVNTSEL_EVENT_MASK 0x000000FFULL
-#define CORE_EVNTSEL_UNIT_MASK 0x0000FF00ULL
-#define CORE_EVNTSEL_EDGE_MASK 0x00040000ULL
-#define CORE_EVNTSEL_INV_MASK 0x00800000ULL
-#define CORE_EVNTSEL_REG_MASK 0xFF000000ULL
-
-#define CORE_EVNTSEL_MASK \
- (INTEL_ARCH_EVTSEL_MASK | \
- INTEL_ARCH_UNIT_MASK | \
- INTEL_ARCH_EDGE_MASK | \
- INTEL_ARCH_INV_MASK | \
- INTEL_ARCH_CNT_MASK)
-
- return hw_event & CORE_EVNTSEL_MASK;
-}
-
-static void intel_pmu_enable_bts(u64 config)
-{
- unsigned long debugctlmsr;
-
- debugctlmsr = get_debugctlmsr();
-
- debugctlmsr |= X86_DEBUGCTL_TR;
- debugctlmsr |= X86_DEBUGCTL_BTS;
- debugctlmsr |= X86_DEBUGCTL_BTINT;
-
- if (!(config & ARCH_PERFMON_EVENTSEL_OS))
- debugctlmsr |= X86_DEBUGCTL_BTS_OFF_OS;
-
- if (!(config & ARCH_PERFMON_EVENTSEL_USR))
- debugctlmsr |= X86_DEBUGCTL_BTS_OFF_USR;
-
- update_debugctlmsr(debugctlmsr);
-}
-
-static void intel_pmu_disable_bts(void)
-{
- struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
- unsigned long debugctlmsr;
-
- if (!cpuc->ds)
- return;
-
- debugctlmsr = get_debugctlmsr();
-
- debugctlmsr &=
- ~(X86_DEBUGCTL_TR | X86_DEBUGCTL_BTS | X86_DEBUGCTL_BTINT |
- X86_DEBUGCTL_BTS_OFF_OS | X86_DEBUGCTL_BTS_OFF_USR);
-
- update_debugctlmsr(debugctlmsr);
-}
-
static void intel_pmu_disable_all(void)
{
struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
@@ -514,12 +460,17 @@ static void intel_pmu_disable_all(void)
if (test_bit(X86_PMC_IDX_FIXED_BTS, cpuc->active_mask))
intel_pmu_disable_bts();
+
+ intel_pmu_pebs_disable_all();
+ intel_pmu_lbr_disable_all();
}
-static void intel_pmu_enable_all(void)
+static void intel_pmu_enable_all(int added)
{
struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+ intel_pmu_pebs_enable_all();
+ intel_pmu_lbr_enable_all();
wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL, x86_pmu.intel_ctrl);
if (test_bit(X86_PMC_IDX_FIXED_BTS, cpuc->active_mask)) {
@@ -533,6 +484,41 @@ static void intel_pmu_enable_all(void)
}
}
+/*
+ * Workaround for:
+ * Intel Errata AAK100 (model 26)
+ * Intel Errata AAP53 (model 30)
+ * Intel Errata BD53 (model 44)
+ *
+ * These chips need to be 'reset' when adding counters by programming
+ * the magic three (non counting) events 0x4300D2, 0x4300B1 and 0x4300B5
+ * either in sequence on the same PMC or on different PMCs.
+ */
+static void intel_pmu_nhm_enable_all(int added)
+{
+ if (added) {
+ struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+ int i;
+
+ wrmsrl(MSR_ARCH_PERFMON_EVENTSEL0 + 0, 0x4300D2);
+ wrmsrl(MSR_ARCH_PERFMON_EVENTSEL0 + 1, 0x4300B1);
+ wrmsrl(MSR_ARCH_PERFMON_EVENTSEL0 + 2, 0x4300B5);
+
+ wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL, 0x3);
+ wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL, 0x0);
+
+ for (i = 0; i < 3; i++) {
+ struct perf_event *event = cpuc->events[i];
+
+ if (!event)
+ continue;
+
+ __x86_pmu_enable_event(&event->hw);
+ }
+ }
+ intel_pmu_enable_all(added);
+}
+
static inline u64 intel_pmu_get_status(void)
{
u64 status;
@@ -547,8 +533,7 @@ static inline void intel_pmu_ack_status(u64 ack)
wrmsrl(MSR_CORE_PERF_GLOBAL_OVF_CTRL, ack);
}
-static inline void
-intel_pmu_disable_fixed(struct hw_perf_event *hwc)
+static void intel_pmu_disable_fixed(struct hw_perf_event *hwc)
{
int idx = hwc->idx - X86_PMC_IDX_FIXED;
u64 ctrl_val, mask;
@@ -557,71 +542,10 @@ intel_pmu_disable_fixed(struct hw_perf_event *hwc)
rdmsrl(hwc->config_base, ctrl_val);
ctrl_val &= ~mask;
- (void)checking_wrmsrl(hwc->config_base, ctrl_val);
-}
-
-static void intel_pmu_drain_bts_buffer(void)
-{
- struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
- struct debug_store *ds = cpuc->ds;
- struct bts_record {
- u64 from;
- u64 to;
- u64 flags;
- };
- struct perf_event *event = cpuc->events[X86_PMC_IDX_FIXED_BTS];
- struct bts_record *at, *top;
- struct perf_output_handle handle;
- struct perf_event_header header;
- struct perf_sample_data data;
- struct pt_regs regs;
-
- if (!event)
- return;
-
- if (!ds)
- return;
-
- at = (struct bts_record *)(unsigned long)ds->bts_buffer_base;
- top = (struct bts_record *)(unsigned long)ds->bts_index;
-
- if (top <= at)
- return;
-
- ds->bts_index = ds->bts_buffer_base;
-
- perf_sample_data_init(&data, 0);
-
- data.period = event->hw.last_period;
- regs.ip = 0;
-
- /*
- * Prepare a generic sample, i.e. fill in the invariant fields.
- * We will overwrite the from and to address before we output
- * the sample.
- */
- perf_prepare_sample(&header, &data, event, &regs);
-
- if (perf_output_begin(&handle, event,
- header.size * (top - at), 1, 1))
- return;
-
- for (; at < top; at++) {
- data.ip = at->from;
- data.addr = at->to;
-
- perf_output_sample(&handle, &header, &data, event);
- }
-
- perf_output_end(&handle);
-
- /* There's new data available. */
- event->hw.interrupts++;
- event->pending_kill = POLL_IN;
+ wrmsrl(hwc->config_base, ctrl_val);
}
-static inline void
-intel_pmu_disable_event(struct perf_event *event)
+static void intel_pmu_disable_event(struct perf_event *event)
{
struct hw_perf_event *hwc = &event->hw;
@@ -637,14 +561,15 @@ intel_pmu_disable_event(struct perf_event *event)
}
x86_pmu_disable_event(event);
+
+ if (unlikely(event->attr.precise))
+ intel_pmu_pebs_disable(event);
}
-static inline void
-intel_pmu_enable_fixed(struct hw_perf_event *hwc)
+static void intel_pmu_enable_fixed(struct hw_perf_event *hwc)
{
int idx = hwc->idx - X86_PMC_IDX_FIXED;
u64 ctrl_val, bits, mask;
- int err;
/*
* Enable IRQ generation (0x8),
@@ -669,7 +594,7 @@ intel_pmu_enable_fixed(struct hw_perf_event *hwc)
rdmsrl(hwc->config_base, ctrl_val);
ctrl_val &= ~mask;
ctrl_val |= bits;
- err = checking_wrmsrl(hwc->config_base, ctrl_val);
+ wrmsrl(hwc->config_base, ctrl_val);
}
static void intel_pmu_enable_event(struct perf_event *event)
@@ -689,6 +614,9 @@ static void intel_pmu_enable_event(struct perf_event *event)
return;
}
+ if (unlikely(event->attr.precise))
+ intel_pmu_pebs_enable(event);
+
__x86_pmu_enable_event(hwc);
}
@@ -708,20 +636,20 @@ static void intel_pmu_reset(void)
unsigned long flags;
int idx;
- if (!x86_pmu.num_events)
+ if (!x86_pmu.num_counters)
return;
local_irq_save(flags);
printk("clearing PMU state on CPU#%d\n", smp_processor_id());
- for (idx = 0; idx < x86_pmu.num_events; idx++) {
+ for (idx = 0; idx < x86_pmu.num_counters; idx++) {
checking_wrmsrl(x86_pmu.eventsel + idx, 0ull);
checking_wrmsrl(x86_pmu.perfctr + idx, 0ull);
}
- for (idx = 0; idx < x86_pmu.num_events_fixed; idx++) {
+ for (idx = 0; idx < x86_pmu.num_counters_fixed; idx++)
checking_wrmsrl(MSR_ARCH_PERFMON_FIXED_CTR0 + idx, 0ull);
- }
+
if (ds)
ds->bts_index = ds->bts_buffer_base;
@@ -747,7 +675,7 @@ static int intel_pmu_handle_irq(struct pt_regs *regs)
intel_pmu_drain_bts_buffer();
status = intel_pmu_get_status();
if (!status) {
- intel_pmu_enable_all();
+ intel_pmu_enable_all(0);
return 0;
}
@@ -762,6 +690,15 @@ again:
inc_irq_stat(apic_perf_irqs);
ack = status;
+
+ intel_pmu_lbr_read();
+
+ /*
+ * PEBS overflow sets bit 62 in the global status register
+ */
+ if (__test_and_clear_bit(62, (unsigned long *)&status))
+ x86_pmu.drain_pebs(regs);
+
for_each_set_bit(bit, (unsigned long *)&status, X86_PMC_IDX_MAX) {
struct perf_event *event = cpuc->events[bit];
@@ -787,26 +724,22 @@ again:
goto again;
done:
- intel_pmu_enable_all();
+ intel_pmu_enable_all(0);
return 1;
}
-static struct event_constraint bts_constraint =
- EVENT_CONSTRAINT(0, 1ULL << X86_PMC_IDX_FIXED_BTS, 0);
-
static struct event_constraint *
-intel_special_constraints(struct perf_event *event)
+intel_bts_constraints(struct perf_event *event)
{
- unsigned int hw_event;
-
- hw_event = event->hw.config & INTEL_ARCH_EVENT_MASK;
+ struct hw_perf_event *hwc = &event->hw;
+ unsigned int hw_event, bts_event;
- if (unlikely((hw_event ==
- x86_pmu.event_map(PERF_COUNT_HW_BRANCH_INSTRUCTIONS)) &&
- (event->hw.sample_period == 1))) {
+ hw_event = hwc->config & INTEL_ARCH_EVENT_MASK;
+ bts_event = x86_pmu.event_map(PERF_COUNT_HW_BRANCH_INSTRUCTIONS);
+ if (unlikely(hw_event == bts_event && hwc->sample_period == 1))
return &bts_constraint;
- }
+
return NULL;
}
@@ -815,24 +748,53 @@ intel_get_event_constraints(struct cpu_hw_events *cpuc, struct perf_event *event
{
struct event_constraint *c;
- c = intel_special_constraints(event);
+ c = intel_bts_constraints(event);
+ if (c)
+ return c;
+
+ c = intel_pebs_constraints(event);
if (c)
return c;
return x86_get_event_constraints(cpuc, event);
}
-static __initconst struct x86_pmu core_pmu = {
+static int intel_pmu_hw_config(struct perf_event *event)
+{
+ int ret = x86_pmu_hw_config(event);
+
+ if (ret)
+ return ret;
+
+ if (event->attr.type != PERF_TYPE_RAW)
+ return 0;
+
+ if (!(event->attr.config & ARCH_PERFMON_EVENTSEL_ANY))
+ return 0;
+
+ if (x86_pmu.version < 3)
+ return -EINVAL;
+
+ if (perf_paranoid_cpu() && !capable(CAP_SYS_ADMIN))
+ return -EACCES;
+
+ event->hw.config |= ARCH_PERFMON_EVENTSEL_ANY;
+
+ return 0;
+}
+
+static __initconst const struct x86_pmu core_pmu = {
.name = "core",
.handle_irq = x86_pmu_handle_irq,
.disable_all = x86_pmu_disable_all,
.enable_all = x86_pmu_enable_all,
.enable = x86_pmu_enable_event,
.disable = x86_pmu_disable_event,
+ .hw_config = x86_pmu_hw_config,
+ .schedule_events = x86_schedule_events,
.eventsel = MSR_ARCH_PERFMON_EVENTSEL0,
.perfctr = MSR_ARCH_PERFMON_PERFCTR0,
.event_map = intel_pmu_event_map,
- .raw_event = intel_pmu_raw_event,
.max_events = ARRAY_SIZE(intel_perfmon_event_map),
.apic = 1,
/*
@@ -845,17 +807,32 @@ static __initconst struct x86_pmu core_pmu = {
.event_constraints = intel_core_event_constraints,
};
-static __initconst struct x86_pmu intel_pmu = {
+static void intel_pmu_cpu_starting(int cpu)
+{
+ init_debug_store_on_cpu(cpu);
+ /*
+ * Deal with CPUs that don't clear their LBRs on power-up.
+ */
+ intel_pmu_lbr_reset();
+}
+
+static void intel_pmu_cpu_dying(int cpu)
+{
+ fini_debug_store_on_cpu(cpu);
+}
+
+static __initconst const struct x86_pmu intel_pmu = {
.name = "Intel",
.handle_irq = intel_pmu_handle_irq,
.disable_all = intel_pmu_disable_all,
.enable_all = intel_pmu_enable_all,
.enable = intel_pmu_enable_event,
.disable = intel_pmu_disable_event,
+ .hw_config = intel_pmu_hw_config,
+ .schedule_events = x86_schedule_events,
.eventsel = MSR_ARCH_PERFMON_EVENTSEL0,
.perfctr = MSR_ARCH_PERFMON_PERFCTR0,
.event_map = intel_pmu_event_map,
- .raw_event = intel_pmu_raw_event,
.max_events = ARRAY_SIZE(intel_perfmon_event_map),
.apic = 1,
/*
@@ -864,14 +841,38 @@ static __initconst struct x86_pmu intel_pmu = {
* the generic event period:
*/
.max_period = (1ULL << 31) - 1,
- .enable_bts = intel_pmu_enable_bts,
- .disable_bts = intel_pmu_disable_bts,
.get_event_constraints = intel_get_event_constraints,
- .cpu_starting = init_debug_store_on_cpu,
- .cpu_dying = fini_debug_store_on_cpu,
+ .cpu_starting = intel_pmu_cpu_starting,
+ .cpu_dying = intel_pmu_cpu_dying,
};
+static void intel_clovertown_quirks(void)
+{
+ /*
+ * PEBS is unreliable due to:
+ *
+ * AJ67 - PEBS may experience CPL leaks
+ * AJ68 - PEBS PMI may be delayed by one event
+ * AJ69 - GLOBAL_STATUS[62] will only be set when DEBUGCTL[12]
+ * AJ106 - FREEZE_LBRS_ON_PMI doesn't work in combination with PEBS
+ *
+ * AJ67 could be worked around by restricting the OS/USR flags.
+ * AJ69 could be worked around by setting PMU_FREEZE_ON_PMI.
+ *
+ * AJ106 could possibly be worked around by not allowing LBR
+ * usage from PEBS, including the fixup.
+ * AJ68 could possibly be worked around by always programming
+ * a pebs_event_reset[0] value and coping with the lost events.
+ *
+ * But taken together it might just make sense to not enable PEBS on
+ * these chips.
+ */
+ printk(KERN_WARNING "PEBS disabled due to CPU errata.\n");
+ x86_pmu.pebs = 0;
+ x86_pmu.pebs_constraints = NULL;
+}
+
static __init int intel_pmu_init(void)
{
union cpuid10_edx edx;
@@ -881,12 +882,13 @@ static __init int intel_pmu_init(void)
int version;
if (!cpu_has(&boot_cpu_data, X86_FEATURE_ARCH_PERFMON)) {
- /* check for P6 processor family */
- if (boot_cpu_data.x86 == 6) {
- return p6_pmu_init();
- } else {
+ switch (boot_cpu_data.x86) {
+ case 0x6:
+ return p6_pmu_init();
+ case 0xf:
+ return p4_pmu_init();
+ }
return -ENODEV;
- }
}
/*
@@ -904,16 +906,28 @@ static __init int intel_pmu_init(void)
x86_pmu = intel_pmu;
x86_pmu.version = version;
- x86_pmu.num_events = eax.split.num_events;
- x86_pmu.event_bits = eax.split.bit_width;
- x86_pmu.event_mask = (1ULL << eax.split.bit_width) - 1;
+ x86_pmu.num_counters = eax.split.num_counters;
+ x86_pmu.cntval_bits = eax.split.bit_width;
+ x86_pmu.cntval_mask = (1ULL << eax.split.bit_width) - 1;
/*
* Quirk: v2 perfmon does not report fixed-purpose events, so
* assume at least 3 events:
*/
if (version > 1)
- x86_pmu.num_events_fixed = max((int)edx.split.num_events_fixed, 3);
+ x86_pmu.num_counters_fixed = max((int)edx.split.num_counters_fixed, 3);
+
+ /*
+ * v2 and above have a perf capabilities MSR
+ */
+ if (version > 1) {
+ u64 capabilities;
+
+ rdmsrl(MSR_IA32_PERF_CAPABILITIES, capabilities);
+ x86_pmu.intel_cap.capabilities = capabilities;
+ }
+
+ intel_ds_init();
/*
* Install the hw-cache-events table:
@@ -924,12 +938,15 @@ static __init int intel_pmu_init(void)
break;
case 15: /* original 65 nm celeron/pentium/core2/xeon, "Merom"/"Conroe" */
+ x86_pmu.quirks = intel_clovertown_quirks;
case 22: /* single-core 65 nm celeron/core2solo "Merom-L"/"Conroe-L" */
case 23: /* current 45 nm celeron/core2/xeon "Penryn"/"Wolfdale" */
case 29: /* six-core 45 nm xeon "Dunnington" */
memcpy(hw_cache_event_ids, core2_hw_cache_event_ids,
sizeof(hw_cache_event_ids));
+ intel_pmu_lbr_init_core();
+
x86_pmu.event_constraints = intel_core2_event_constraints;
pr_cont("Core2 events, ");
break;
@@ -940,13 +957,19 @@ static __init int intel_pmu_init(void)
memcpy(hw_cache_event_ids, nehalem_hw_cache_event_ids,
sizeof(hw_cache_event_ids));
+ intel_pmu_lbr_init_nhm();
+
x86_pmu.event_constraints = intel_nehalem_event_constraints;
- pr_cont("Nehalem/Corei7 events, ");
+ x86_pmu.enable_all = intel_pmu_nhm_enable_all;
+ pr_cont("Nehalem events, ");
break;
+
case 28: /* Atom */
memcpy(hw_cache_event_ids, atom_hw_cache_event_ids,
sizeof(hw_cache_event_ids));
+ intel_pmu_lbr_init_atom();
+
x86_pmu.event_constraints = intel_gen_event_constraints;
pr_cont("Atom events, ");
break;
@@ -956,7 +979,10 @@ static __init int intel_pmu_init(void)
memcpy(hw_cache_event_ids, westmere_hw_cache_event_ids,
sizeof(hw_cache_event_ids));
+ intel_pmu_lbr_init_nhm();
+
x86_pmu.event_constraints = intel_westmere_event_constraints;
+ x86_pmu.enable_all = intel_pmu_nhm_enable_all;
pr_cont("Westmere events, ");
break;
diff --git a/arch/x86/kernel/cpu/perf_event_intel_ds.c b/arch/x86/kernel/cpu/perf_event_intel_ds.c
new file mode 100644
index 0000000..ec8b2e1
--- /dev/null
+++ b/arch/x86/kernel/cpu/perf_event_intel_ds.c
@@ -0,0 +1,664 @@
+#ifdef CONFIG_CPU_SUP_INTEL
+
+/* The maximal number of PEBS events: */
+#define MAX_PEBS_EVENTS 4
+
+/* The size of a BTS record in bytes: */
+#define BTS_RECORD_SIZE 24
+
+#define BTS_BUFFER_SIZE (PAGE_SIZE << 4)
+#define PEBS_BUFFER_SIZE PAGE_SIZE
+
+/*
+ * pebs_record_32 for p4 and core not supported
+
+struct pebs_record_32 {
+ u32 flags, ip;
+ u32 ax, bc, cx, dx;
+ u32 si, di, bp, sp;
+};
+
+ */
+
+struct pebs_record_core {
+ u64 flags, ip;
+ u64 ax, bx, cx, dx;
+ u64 si, di, bp, sp;
+ u64 r8, r9, r10, r11;
+ u64 r12, r13, r14, r15;
+};
+
+struct pebs_record_nhm {
+ u64 flags, ip;
+ u64 ax, bx, cx, dx;
+ u64 si, di, bp, sp;
+ u64 r8, r9, r10, r11;
+ u64 r12, r13, r14, r15;
+ u64 status, dla, dse, lat;
+};
+
+/*
+ * A debug store configuration.
+ *
+ * We only support architectures that use 64bit fields.
+ */
+struct debug_store {
+ u64 bts_buffer_base;
+ u64 bts_index;
+ u64 bts_absolute_maximum;
+ u64 bts_interrupt_threshold;
+ u64 pebs_buffer_base;
+ u64 pebs_index;
+ u64 pebs_absolute_maximum;
+ u64 pebs_interrupt_threshold;
+ u64 pebs_event_reset[MAX_PEBS_EVENTS];
+};
+
+static void init_debug_store_on_cpu(int cpu)
+{
+ struct debug_store *ds = per_cpu(cpu_hw_events, cpu).ds;
+
+ if (!ds)
+ return;
+
+ wrmsr_on_cpu(cpu, MSR_IA32_DS_AREA,
+ (u32)((u64)(unsigned long)ds),
+ (u32)((u64)(unsigned long)ds >> 32));
+}
+
+static void fini_debug_store_on_cpu(int cpu)
+{
+ if (!per_cpu(cpu_hw_events, cpu).ds)
+ return;
+
+ wrmsr_on_cpu(cpu, MSR_IA32_DS_AREA, 0, 0);
+}
+
+static void release_ds_buffers(void)
+{
+ int cpu;
+
+ if (!x86_pmu.bts && !x86_pmu.pebs)
+ return;
+
+ get_online_cpus();
+
+ for_each_online_cpu(cpu)
+ fini_debug_store_on_cpu(cpu);
+
+ for_each_possible_cpu(cpu) {
+ struct debug_store *ds = per_cpu(cpu_hw_events, cpu).ds;
+
+ if (!ds)
+ continue;
+
+ per_cpu(cpu_hw_events, cpu).ds = NULL;
+
+ kfree((void *)(unsigned long)ds->pebs_buffer_base);
+ kfree((void *)(unsigned long)ds->bts_buffer_base);
+ kfree(ds);
+ }
+
+ put_online_cpus();
+}
+
+static int reserve_ds_buffers(void)
+{
+ int cpu, err = 0;
+
+ if (!x86_pmu.bts && !x86_pmu.pebs)
+ return 0;
+
+ get_online_cpus();
+
+ for_each_possible_cpu(cpu) {
+ struct debug_store *ds;
+ void *buffer;
+ int max, thresh;
+
+ err = -ENOMEM;
+ ds = kzalloc(sizeof(*ds), GFP_KERNEL);
+ if (unlikely(!ds))
+ break;
+ per_cpu(cpu_hw_events, cpu).ds = ds;
+
+ if (x86_pmu.bts) {
+ buffer = kzalloc(BTS_BUFFER_SIZE, GFP_KERNEL);
+ if (unlikely(!buffer))
+ break;
+
+ max = BTS_BUFFER_SIZE / BTS_RECORD_SIZE;
+ thresh = max / 16;
+
+ ds->bts_buffer_base = (u64)(unsigned long)buffer;
+ ds->bts_index = ds->bts_buffer_base;
+ ds->bts_absolute_maximum = ds->bts_buffer_base +
+ max * BTS_RECORD_SIZE;
+ ds->bts_interrupt_threshold = ds->bts_absolute_maximum -
+ thresh * BTS_RECORD_SIZE;
+ }
+
+ if (x86_pmu.pebs) {
+ buffer = kzalloc(PEBS_BUFFER_SIZE, GFP_KERNEL);
+ if (unlikely(!buffer))
+ break;
+
+ max = PEBS_BUFFER_SIZE / x86_pmu.pebs_record_size;
+
+ ds->pebs_buffer_base = (u64)(unsigned long)buffer;
+ ds->pebs_index = ds->pebs_buffer_base;
+ ds->pebs_absolute_maximum = ds->pebs_buffer_base +
+ max * x86_pmu.pebs_record_size;
+ /*
+ * Always use single record PEBS
+ */
+ ds->pebs_interrupt_threshold = ds->pebs_buffer_base +
+ x86_pmu.pebs_record_size;
+ }
+
+ err = 0;
+ }
+
+ if (err)
+ release_ds_buffers();
+ else {
+ for_each_online_cpu(cpu)
+ init_debug_store_on_cpu(cpu);
+ }
+
+ put_online_cpus();
+
+ return err;
+}
+
+/*
+ * BTS
+ */
+
+static struct event_constraint bts_constraint =
+ EVENT_CONSTRAINT(0, 1ULL << X86_PMC_IDX_FIXED_BTS, 0);
+
+static void intel_pmu_enable_bts(u64 config)
+{
+ unsigned long debugctlmsr;
+
+ debugctlmsr = get_debugctlmsr();
+
+ debugctlmsr |= DEBUGCTLMSR_TR;
+ debugctlmsr |= DEBUGCTLMSR_BTS;
+ debugctlmsr |= DEBUGCTLMSR_BTINT;
+
+ if (!(config & ARCH_PERFMON_EVENTSEL_OS))
+ debugctlmsr |= DEBUGCTLMSR_BTS_OFF_OS;
+
+ if (!(config & ARCH_PERFMON_EVENTSEL_USR))
+ debugctlmsr |= DEBUGCTLMSR_BTS_OFF_USR;
+
+ update_debugctlmsr(debugctlmsr);
+}
+
+static void intel_pmu_disable_bts(void)
+{
+ struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+ unsigned long debugctlmsr;
+
+ if (!cpuc->ds)
+ return;
+
+ debugctlmsr = get_debugctlmsr();
+
+ debugctlmsr &=
+ ~(DEBUGCTLMSR_TR | DEBUGCTLMSR_BTS | DEBUGCTLMSR_BTINT |
+ DEBUGCTLMSR_BTS_OFF_OS | DEBUGCTLMSR_BTS_OFF_USR);
+
+ update_debugctlmsr(debugctlmsr);
+}
+
+static void intel_pmu_drain_bts_buffer(void)
+{
+ struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+ struct debug_store *ds = cpuc->ds;
+ struct bts_record {
+ u64 from;
+ u64 to;
+ u64 flags;
+ };
+ struct perf_event *event = cpuc->events[X86_PMC_IDX_FIXED_BTS];
+ struct bts_record *at, *top;
+ struct perf_output_handle handle;
+ struct perf_event_header header;
+ struct perf_sample_data data;
+ struct pt_regs regs;
+
+ if (!event)
+ return;
+
+ if (!ds)
+ return;
+
+ at = (struct bts_record *)(unsigned long)ds->bts_buffer_base;
+ top = (struct bts_record *)(unsigned long)ds->bts_index;
+
+ if (top <= at)
+ return;
+
+ ds->bts_index = ds->bts_buffer_base;
+
+ perf_sample_data_init(&data, 0);
+ data.period = event->hw.last_period;
+ regs.ip = 0;
+
+ /*
+ * Prepare a generic sample, i.e. fill in the invariant fields.
+ * We will overwrite the from and to address before we output
+ * the sample.
+ */
+ perf_prepare_sample(&header, &data, event, &regs);
+
+ if (perf_output_begin(&handle, event, header.size * (top - at), 1, 1))
+ return;
+
+ for (; at < top; at++) {
+ data.ip = at->from;
+ data.addr = at->to;
+
+ perf_output_sample(&handle, &header, &data, event);
+ }
+
+ perf_output_end(&handle);
+
+ /* There's new data available. */
+ event->hw.interrupts++;
+ event->pending_kill = POLL_IN;
+}
+
+/*
+ * PEBS
+ */
+
+static struct event_constraint intel_core_pebs_events[] = {
+ PEBS_EVENT_CONSTRAINT(0x00c0, 0x1), /* INSTR_RETIRED.ANY */
+ PEBS_EVENT_CONSTRAINT(0xfec1, 0x1), /* X87_OPS_RETIRED.ANY */
+ PEBS_EVENT_CONSTRAINT(0x00c5, 0x1), /* BR_INST_RETIRED.MISPRED */
+ PEBS_EVENT_CONSTRAINT(0x1fc7, 0x1), /* SIMD_INST_RETURED.ANY */
+ PEBS_EVENT_CONSTRAINT(0x01cb, 0x1), /* MEM_LOAD_RETIRED.L1D_MISS */
+ PEBS_EVENT_CONSTRAINT(0x02cb, 0x1), /* MEM_LOAD_RETIRED.L1D_LINE_MISS */
+ PEBS_EVENT_CONSTRAINT(0x04cb, 0x1), /* MEM_LOAD_RETIRED.L2_MISS */
+ PEBS_EVENT_CONSTRAINT(0x08cb, 0x1), /* MEM_LOAD_RETIRED.L2_LINE_MISS */
+ PEBS_EVENT_CONSTRAINT(0x10cb, 0x1), /* MEM_LOAD_RETIRED.DTLB_MISS */
+ EVENT_CONSTRAINT_END
+};
+
+static struct event_constraint intel_nehalem_pebs_events[] = {
+ PEBS_EVENT_CONSTRAINT(0x00c0, 0xf), /* INSTR_RETIRED.ANY */
+ PEBS_EVENT_CONSTRAINT(0xfec1, 0xf), /* X87_OPS_RETIRED.ANY */
+ PEBS_EVENT_CONSTRAINT(0x00c5, 0xf), /* BR_INST_RETIRED.MISPRED */
+ PEBS_EVENT_CONSTRAINT(0x1fc7, 0xf), /* SIMD_INST_RETURED.ANY */
+ PEBS_EVENT_CONSTRAINT(0x01cb, 0xf), /* MEM_LOAD_RETIRED.L1D_MISS */
+ PEBS_EVENT_CONSTRAINT(0x02cb, 0xf), /* MEM_LOAD_RETIRED.L1D_LINE_MISS */
+ PEBS_EVENT_CONSTRAINT(0x04cb, 0xf), /* MEM_LOAD_RETIRED.L2_MISS */
+ PEBS_EVENT_CONSTRAINT(0x08cb, 0xf), /* MEM_LOAD_RETIRED.L2_LINE_MISS */
+ PEBS_EVENT_CONSTRAINT(0x10cb, 0xf), /* MEM_LOAD_RETIRED.DTLB_MISS */
+ EVENT_CONSTRAINT_END
+};
+
+static struct event_constraint *
+intel_pebs_constraints(struct perf_event *event)
+{
+ struct event_constraint *c;
+
+ if (!event->attr.precise)
+ return NULL;
+
+ if (x86_pmu.pebs_constraints) {
+ for_each_event_constraint(c, x86_pmu.pebs_constraints) {
+ if ((event->hw.config & c->cmask) == c->code)
+ return c;
+ }
+ }
+
+ return &emptyconstraint;
+}
+
+static void intel_pmu_pebs_enable(struct perf_event *event)
+{
+ struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+ struct hw_perf_event *hwc = &event->hw;
+
+ hwc->config &= ~ARCH_PERFMON_EVENTSEL_INT;
+
+ cpuc->pebs_enabled |= 1ULL << hwc->idx;
+ WARN_ON_ONCE(cpuc->enabled);
+
+ if (x86_pmu.intel_cap.pebs_trap)
+ intel_pmu_lbr_enable(event);
+}
+
+static void intel_pmu_pebs_disable(struct perf_event *event)
+{
+ struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+ struct hw_perf_event *hwc = &event->hw;
+
+ cpuc->pebs_enabled &= ~(1ULL << hwc->idx);
+ if (cpuc->enabled)
+ wrmsrl(MSR_IA32_PEBS_ENABLE, cpuc->pebs_enabled);
+
+ hwc->config |= ARCH_PERFMON_EVENTSEL_INT;
+
+ if (x86_pmu.intel_cap.pebs_trap)
+ intel_pmu_lbr_disable(event);
+}
+
+static void intel_pmu_pebs_enable_all(void)
+{
+ struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+
+ if (cpuc->pebs_enabled)
+ wrmsrl(MSR_IA32_PEBS_ENABLE, cpuc->pebs_enabled);
+}
+
+static void intel_pmu_pebs_disable_all(void)
+{
+ struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+
+ if (cpuc->pebs_enabled)
+ wrmsrl(MSR_IA32_PEBS_ENABLE, 0);
+}
+
+#include <asm/insn.h>
+
+static inline bool kernel_ip(unsigned long ip)
+{
+#ifdef CONFIG_X86_32
+ return ip > PAGE_OFFSET;
+#else
+ return (long)ip < 0;
+#endif
+}
+
+static int intel_pmu_pebs_fixup_ip(struct pt_regs *regs)
+{
+ struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+ unsigned long from = cpuc->lbr_entries[0].from;
+ unsigned long old_to, to = cpuc->lbr_entries[0].to;
+ unsigned long ip = regs->ip;
+
+ /*
+ * We don't need to fixup if the PEBS assist is fault like
+ */
+ if (!x86_pmu.intel_cap.pebs_trap)
+ return 1;
+
+ /*
+ * No LBR entry, no basic block, no rewinding
+ */
+ if (!cpuc->lbr_stack.nr || !from || !to)
+ return 0;
+
+ /*
+ * Basic blocks should never cross user/kernel boundaries
+ */
+ if (kernel_ip(ip) != kernel_ip(to))
+ return 0;
+
+ /*
+ * unsigned math, either ip is before the start (impossible) or
+ * the basic block is larger than 1 page (sanity)
+ */
+ if ((ip - to) > PAGE_SIZE)
+ return 0;
+
+ /*
+ * We sampled a branch insn, rewind using the LBR stack
+ */
+ if (ip == to) {
+ regs->ip = from;
+ return 1;
+ }
+
+ do {
+ struct insn insn;
+ u8 buf[MAX_INSN_SIZE];
+ void *kaddr;
+
+ old_to = to;
+ if (!kernel_ip(ip)) {
+ int bytes, size = MAX_INSN_SIZE;
+
+ bytes = copy_from_user_nmi(buf, (void __user *)to, size);
+ if (bytes != size)
+ return 0;
+
+ kaddr = buf;
+ } else
+ kaddr = (void *)to;
+
+ kernel_insn_init(&insn, kaddr);
+ insn_get_length(&insn);
+ to += insn.length;
+ } while (to < ip);
+
+ if (to == ip) {
+ regs->ip = old_to;
+ return 1;
+ }
+
+ /*
+ * Even though we decoded the basic block, the instruction stream
+ * never matched the given IP, either the TO or the IP got corrupted.
+ */
+ return 0;
+}
+
+static int intel_pmu_save_and_restart(struct perf_event *event);
+
+static void intel_pmu_drain_pebs_core(struct pt_regs *iregs)
+{
+ struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+ struct debug_store *ds = cpuc->ds;
+ struct perf_event *event = cpuc->events[0]; /* PMC0 only */
+ struct pebs_record_core *at, *top;
+ struct perf_sample_data data;
+ struct perf_raw_record raw;
+ struct pt_regs regs;
+ int n;
+
+ if (!ds || !x86_pmu.pebs)
+ return;
+
+ at = (struct pebs_record_core *)(unsigned long)ds->pebs_buffer_base;
+ top = (struct pebs_record_core *)(unsigned long)ds->pebs_index;
+
+ /*
+ * Whatever else happens, drain the thing
+ */
+ ds->pebs_index = ds->pebs_buffer_base;
+
+ if (!test_bit(0, cpuc->active_mask))
+ return;
+
+ WARN_ON_ONCE(!event);
+
+ if (!event->attr.precise)
+ return;
+
+ n = top - at;
+ if (n <= 0)
+ return;
+
+ if (!intel_pmu_save_and_restart(event))
+ return;
+
+ /*
+ * Should not happen, we program the threshold at 1 and do not
+ * set a reset value.
+ */
+ WARN_ON_ONCE(n > 1);
+ at += n - 1;
+
+ perf_sample_data_init(&data, 0);
+ data.period = event->hw.last_period;
+
+ if (event->attr.sample_type & PERF_SAMPLE_RAW) {
+ raw.size = x86_pmu.pebs_record_size;
+ raw.data = at;
+ data.raw = &raw;
+ }
+
+ /*
+ * We use the interrupt regs as a base because the PEBS record
+ * does not contain a full regs set, specifically it seems to
+ * lack segment descriptors, which get used by things like
+ * user_mode().
+ *
+ * In the simple case fix up only the IP and BP,SP regs, for
+ * PERF_SAMPLE_IP and PERF_SAMPLE_CALLCHAIN to function properly.
+ * A possible PERF_SAMPLE_REGS will have to transfer all regs.
+ */
+ regs = *iregs;
+ regs.ip = at->ip;
+ regs.bp = at->bp;
+ regs.sp = at->sp;
+
+ if (intel_pmu_pebs_fixup_ip(&regs))
+ regs.flags |= PERF_EFLAGS_EXACT;
+ else
+ regs.flags &= ~PERF_EFLAGS_EXACT;
+
+ if (perf_event_overflow(event, 1, &data, &regs))
+ x86_pmu_stop(event);
+}
+
+static void intel_pmu_drain_pebs_nhm(struct pt_regs *iregs)
+{
+ struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+ struct debug_store *ds = cpuc->ds;
+ struct pebs_record_nhm *at, *top;
+ struct perf_sample_data data;
+ struct perf_event *event = NULL;
+ struct perf_raw_record raw;
+ struct pt_regs regs;
+ u64 status = 0;
+ int bit, n;
+
+ if (!ds || !x86_pmu.pebs)
+ return;
+
+ at = (struct pebs_record_nhm *)(unsigned long)ds->pebs_buffer_base;
+ top = (struct pebs_record_nhm *)(unsigned long)ds->pebs_index;
+
+ ds->pebs_index = ds->pebs_buffer_base;
+
+ n = top - at;
+ if (n <= 0)
+ return;
+
+ /*
+ * Should not happen, we program the threshold at 1 and do not
+ * set a reset value.
+ */
+ WARN_ON_ONCE(n > MAX_PEBS_EVENTS);
+
+ for ( ; at < top; at++) {
+ for_each_set_bit(bit, (unsigned long *)&at->status, MAX_PEBS_EVENTS) {
+ event = cpuc->events[bit];
+ if (!test_bit(bit, cpuc->active_mask))
+ continue;
+
+ WARN_ON_ONCE(!event);
+
+ if (!event->attr.precise)
+ continue;
+
+ if (__test_and_set_bit(bit, (unsigned long *)&status))
+ continue;
+
+ break;
+ }
+
+ if (!event || bit >= MAX_PEBS_EVENTS)
+ continue;
+
+ if (!intel_pmu_save_and_restart(event))
+ continue;
+
+ perf_sample_data_init(&data, 0);
+ data.period = event->hw.last_period;
+
+ if (event->attr.sample_type & PERF_SAMPLE_RAW) {
+ raw.size = x86_pmu.pebs_record_size;
+ raw.data = at;
+ data.raw = &raw;
+ }
+
+ /*
+ * See the comment in intel_pmu_drain_pebs_core()
+ */
+ regs = *iregs;
+ regs.ip = at->ip;
+ regs.bp = at->bp;
+ regs.sp = at->sp;
+
+ if (intel_pmu_pebs_fixup_ip(&regs))
+ regs.flags |= PERF_EFLAGS_EXACT;
+ else
+ regs.flags &= ~PERF_EFLAGS_EXACT;
+
+ if (perf_event_overflow(event, 1, &data, &regs))
+ x86_pmu_stop(event);
+ }
+}
+
+/*
+ * BTS, PEBS probe and setup
+ */
+
+static void intel_ds_init(void)
+{
+ /*
+ * No support for 32bit formats
+ */
+ if (!boot_cpu_has(X86_FEATURE_DTES64))
+ return;
+
+ x86_pmu.bts = boot_cpu_has(X86_FEATURE_BTS);
+ x86_pmu.pebs = boot_cpu_has(X86_FEATURE_PEBS);
+ if (x86_pmu.pebs) {
+ char pebs_type = x86_pmu.intel_cap.pebs_trap ? '+' : '-';
+ int format = x86_pmu.intel_cap.pebs_format;
+
+ switch (format) {
+ case 0:
+ printk(KERN_CONT "PEBS fmt0%c, ", pebs_type);
+ x86_pmu.pebs_record_size = sizeof(struct pebs_record_core);
+ x86_pmu.drain_pebs = intel_pmu_drain_pebs_core;
+ x86_pmu.pebs_constraints = intel_core_pebs_events;
+ break;
+
+ case 1:
+ printk(KERN_CONT "PEBS fmt1%c, ", pebs_type);
+ x86_pmu.pebs_record_size = sizeof(struct pebs_record_nhm);
+ x86_pmu.drain_pebs = intel_pmu_drain_pebs_nhm;
+ x86_pmu.pebs_constraints = intel_nehalem_pebs_events;
+ break;
+
+ default:
+ printk(KERN_CONT "no PEBS fmt%d%c, ", format, pebs_type);
+ x86_pmu.pebs = 0;
+ break;
+ }
+ }
+}
+
+#else /* CONFIG_CPU_SUP_INTEL */
+
+static int reserve_ds_buffers(void)
+{
+ return 0;
+}
+
+static void release_ds_buffers(void)
+{
+}
+
+#endif /* CONFIG_CPU_SUP_INTEL */
diff --git a/arch/x86/kernel/cpu/perf_event_intel_lbr.c b/arch/x86/kernel/cpu/perf_event_intel_lbr.c
new file mode 100644
index 0000000..d202c1b
--- /dev/null
+++ b/arch/x86/kernel/cpu/perf_event_intel_lbr.c
@@ -0,0 +1,218 @@
+#ifdef CONFIG_CPU_SUP_INTEL
+
+enum {
+ LBR_FORMAT_32 = 0x00,
+ LBR_FORMAT_LIP = 0x01,
+ LBR_FORMAT_EIP = 0x02,
+ LBR_FORMAT_EIP_FLAGS = 0x03,
+};
+
+/*
+ * We only support LBR implementations that have FREEZE_LBRS_ON_PMI
+ * otherwise it becomes near impossible to get a reliable stack.
+ */
+
+static void __intel_pmu_lbr_enable(void)
+{
+ u64 debugctl;
+
+ rdmsrl(MSR_IA32_DEBUGCTLMSR, debugctl);
+ debugctl |= (DEBUGCTLMSR_LBR | DEBUGCTLMSR_FREEZE_LBRS_ON_PMI);
+ wrmsrl(MSR_IA32_DEBUGCTLMSR, debugctl);
+}
+
+static void __intel_pmu_lbr_disable(void)
+{
+ u64 debugctl;
+
+ rdmsrl(MSR_IA32_DEBUGCTLMSR, debugctl);
+ debugctl &= ~(DEBUGCTLMSR_LBR | DEBUGCTLMSR_FREEZE_LBRS_ON_PMI);
+ wrmsrl(MSR_IA32_DEBUGCTLMSR, debugctl);
+}
+
+static void intel_pmu_lbr_reset_32(void)
+{
+ int i;
+
+ for (i = 0; i < x86_pmu.lbr_nr; i++)
+ wrmsrl(x86_pmu.lbr_from + i, 0);
+}
+
+static void intel_pmu_lbr_reset_64(void)
+{
+ int i;
+
+ for (i = 0; i < x86_pmu.lbr_nr; i++) {
+ wrmsrl(x86_pmu.lbr_from + i, 0);
+ wrmsrl(x86_pmu.lbr_to + i, 0);
+ }
+}
+
+static void intel_pmu_lbr_reset(void)
+{
+ if (!x86_pmu.lbr_nr)
+ return;
+
+ if (x86_pmu.intel_cap.lbr_format == LBR_FORMAT_32)
+ intel_pmu_lbr_reset_32();
+ else
+ intel_pmu_lbr_reset_64();
+}
+
+static void intel_pmu_lbr_enable(struct perf_event *event)
+{
+ struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+
+ if (!x86_pmu.lbr_nr)
+ return;
+
+ WARN_ON_ONCE(cpuc->enabled);
+
+ /*
+ * Reset the LBR stack if we changed task context to
+ * avoid data leaks.
+ */
+
+ if (event->ctx->task && cpuc->lbr_context != event->ctx) {
+ intel_pmu_lbr_reset();
+ cpuc->lbr_context = event->ctx;
+ }
+
+ cpuc->lbr_users++;
+}
+
+static void intel_pmu_lbr_disable(struct perf_event *event)
+{
+ struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+
+ if (!x86_pmu.lbr_nr)
+ return;
+
+ cpuc->lbr_users--;
+ WARN_ON_ONCE(cpuc->lbr_users < 0);
+
+ if (cpuc->enabled && !cpuc->lbr_users)
+ __intel_pmu_lbr_disable();
+}
+
+static void intel_pmu_lbr_enable_all(void)
+{
+ struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+
+ if (cpuc->lbr_users)
+ __intel_pmu_lbr_enable();
+}
+
+static void intel_pmu_lbr_disable_all(void)
+{
+ struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+
+ if (cpuc->lbr_users)
+ __intel_pmu_lbr_disable();
+}
+
+static inline u64 intel_pmu_lbr_tos(void)
+{
+ u64 tos;
+
+ rdmsrl(x86_pmu.lbr_tos, tos);
+
+ return tos;
+}
+
+static void intel_pmu_lbr_read_32(struct cpu_hw_events *cpuc)
+{
+ unsigned long mask = x86_pmu.lbr_nr - 1;
+ u64 tos = intel_pmu_lbr_tos();
+ int i;
+
+ for (i = 0; i < x86_pmu.lbr_nr; i++) {
+ unsigned long lbr_idx = (tos - i) & mask;
+ union {
+ struct {
+ u32 from;
+ u32 to;
+ };
+ u64 lbr;
+ } msr_lastbranch;
+
+ rdmsrl(x86_pmu.lbr_from + lbr_idx, msr_lastbranch.lbr);
+
+ cpuc->lbr_entries[i].from = msr_lastbranch.from;
+ cpuc->lbr_entries[i].to = msr_lastbranch.to;
+ cpuc->lbr_entries[i].flags = 0;
+ }
+ cpuc->lbr_stack.nr = i;
+}
+
+#define LBR_FROM_FLAG_MISPRED (1ULL << 63)
+
+/*
+ * Due to lack of segmentation in Linux the effective address (offset)
+ * is the same as the linear address, allowing us to merge the LIP and EIP
+ * LBR formats.
+ */
+static void intel_pmu_lbr_read_64(struct cpu_hw_events *cpuc)
+{
+ unsigned long mask = x86_pmu.lbr_nr - 1;
+ int lbr_format = x86_pmu.intel_cap.lbr_format;
+ u64 tos = intel_pmu_lbr_tos();
+ int i;
+
+ for (i = 0; i < x86_pmu.lbr_nr; i++) {
+ unsigned long lbr_idx = (tos - i) & mask;
+ u64 from, to, flags = 0;
+
+ rdmsrl(x86_pmu.lbr_from + lbr_idx, from);
+ rdmsrl(x86_pmu.lbr_to + lbr_idx, to);
+
+ if (lbr_format == LBR_FORMAT_EIP_FLAGS) {
+ flags = !!(from & LBR_FROM_FLAG_MISPRED);
+ from = (u64)((((s64)from) << 1) >> 1);
+ }
+
+ cpuc->lbr_entries[i].from = from;
+ cpuc->lbr_entries[i].to = to;
+ cpuc->lbr_entries[i].flags = flags;
+ }
+ cpuc->lbr_stack.nr = i;
+}
+
+static void intel_pmu_lbr_read(void)
+{
+ struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+
+ if (!cpuc->lbr_users)
+ return;
+
+ if (x86_pmu.intel_cap.lbr_format == LBR_FORMAT_32)
+ intel_pmu_lbr_read_32(cpuc);
+ else
+ intel_pmu_lbr_read_64(cpuc);
+}
+
+static void intel_pmu_lbr_init_core(void)
+{
+ x86_pmu.lbr_nr = 4;
+ x86_pmu.lbr_tos = 0x01c9;
+ x86_pmu.lbr_from = 0x40;
+ x86_pmu.lbr_to = 0x60;
+}
+
+static void intel_pmu_lbr_init_nhm(void)
+{
+ x86_pmu.lbr_nr = 16;
+ x86_pmu.lbr_tos = 0x01c9;
+ x86_pmu.lbr_from = 0x680;
+ x86_pmu.lbr_to = 0x6c0;
+}
+
+static void intel_pmu_lbr_init_atom(void)
+{
+ x86_pmu.lbr_nr = 8;
+ x86_pmu.lbr_tos = 0x01c9;
+ x86_pmu.lbr_from = 0x40;
+ x86_pmu.lbr_to = 0x60;
+}
+
+#endif /* CONFIG_CPU_SUP_INTEL */
diff --git a/arch/x86/kernel/cpu/perf_event_p4.c b/arch/x86/kernel/cpu/perf_event_p4.c
new file mode 100644
index 0000000..15367cc
--- /dev/null
+++ b/arch/x86/kernel/cpu/perf_event_p4.c
@@ -0,0 +1,834 @@
+/*
+ * Netburst Perfomance Events (P4, old Xeon)
+ *
+ * Copyright (C) 2010 Parallels, Inc., Cyrill Gorcunov <gorcunov@openvz.org>
+ * Copyright (C) 2010 Intel Corporation, Lin Ming <ming.m.lin@intel.com>
+ *
+ * For licencing details see kernel-base/COPYING
+ */
+
+#ifdef CONFIG_CPU_SUP_INTEL
+
+#include <asm/perf_event_p4.h>
+
+#define P4_CNTR_LIMIT 3
+/*
+ * array indices: 0,1 - HT threads, used with HT enabled cpu
+ */
+struct p4_event_bind {
+ unsigned int opcode; /* Event code and ESCR selector */
+ unsigned int escr_msr[2]; /* ESCR MSR for this event */
+ unsigned char cntr[2][P4_CNTR_LIMIT]; /* counter index (offset), -1 on abscence */
+};
+
+struct p4_cache_event_bind {
+ unsigned int metric_pebs;
+ unsigned int metric_vert;
+};
+
+#define P4_GEN_CACHE_EVENT_BIND(name) \
+ [P4_CACHE__##name] = { \
+ .metric_pebs = P4_PEBS__##name, \
+ .metric_vert = P4_VERT__##name, \
+ }
+
+static struct p4_cache_event_bind p4_cache_event_bind_map[] = {
+ P4_GEN_CACHE_EVENT_BIND(1stl_cache_load_miss_retired),
+ P4_GEN_CACHE_EVENT_BIND(2ndl_cache_load_miss_retired),
+ P4_GEN_CACHE_EVENT_BIND(dtlb_load_miss_retired),
+ P4_GEN_CACHE_EVENT_BIND(dtlb_store_miss_retired),
+};
+
+/*
+ * Note that we don't use CCCR1 here, there is an
+ * exception for P4_BSQ_ALLOCATION but we just have
+ * no workaround
+ *
+ * consider this binding as resources which particular
+ * event may borrow, it doesn't contain EventMask,
+ * Tags and friends -- they are left to a caller
+ */
+static struct p4_event_bind p4_event_bind_map[] = {
+ [P4_EVENT_TC_DELIVER_MODE] = {
+ .opcode = P4_OPCODE(P4_EVENT_TC_DELIVER_MODE),
+ .escr_msr = { MSR_P4_TC_ESCR0, MSR_P4_TC_ESCR1 },
+ .cntr = { {4, 5, -1}, {6, 7, -1} },
+ },
+ [P4_EVENT_BPU_FETCH_REQUEST] = {
+ .opcode = P4_OPCODE(P4_EVENT_BPU_FETCH_REQUEST),
+ .escr_msr = { MSR_P4_BPU_ESCR0, MSR_P4_BPU_ESCR1 },
+ .cntr = { {0, -1, -1}, {2, -1, -1} },
+ },
+ [P4_EVENT_ITLB_REFERENCE] = {
+ .opcode = P4_OPCODE(P4_EVENT_ITLB_REFERENCE),
+ .escr_msr = { MSR_P4_ITLB_ESCR0, MSR_P4_ITLB_ESCR1 },
+ .cntr = { {0, -1, -1}, {2, -1, -1} },
+ },
+ [P4_EVENT_MEMORY_CANCEL] = {
+ .opcode = P4_OPCODE(P4_EVENT_MEMORY_CANCEL),
+ .escr_msr = { MSR_P4_DAC_ESCR0, MSR_P4_DAC_ESCR1 },
+ .cntr = { {8, 9, -1}, {10, 11, -1} },
+ },
+ [P4_EVENT_MEMORY_COMPLETE] = {
+ .opcode = P4_OPCODE(P4_EVENT_MEMORY_COMPLETE),
+ .escr_msr = { MSR_P4_SAAT_ESCR0 , MSR_P4_SAAT_ESCR1 },
+ .cntr = { {8, 9, -1}, {10, 11, -1} },
+ },
+ [P4_EVENT_LOAD_PORT_REPLAY] = {
+ .opcode = P4_OPCODE(P4_EVENT_LOAD_PORT_REPLAY),
+ .escr_msr = { MSR_P4_SAAT_ESCR0, MSR_P4_SAAT_ESCR1 },
+ .cntr = { {8, 9, -1}, {10, 11, -1} },
+ },
+ [P4_EVENT_STORE_PORT_REPLAY] = {
+ .opcode = P4_OPCODE(P4_EVENT_STORE_PORT_REPLAY),
+ .escr_msr = { MSR_P4_SAAT_ESCR0 , MSR_P4_SAAT_ESCR1 },
+ .cntr = { {8, 9, -1}, {10, 11, -1} },
+ },
+ [P4_EVENT_MOB_LOAD_REPLAY] = {
+ .opcode = P4_OPCODE(P4_EVENT_MOB_LOAD_REPLAY),
+ .escr_msr = { MSR_P4_MOB_ESCR0, MSR_P4_MOB_ESCR1 },
+ .cntr = { {0, -1, -1}, {2, -1, -1} },
+ },
+ [P4_EVENT_PAGE_WALK_TYPE] = {
+ .opcode = P4_OPCODE(P4_EVENT_PAGE_WALK_TYPE),
+ .escr_msr = { MSR_P4_PMH_ESCR0, MSR_P4_PMH_ESCR1 },
+ .cntr = { {0, -1, -1}, {2, -1, -1} },
+ },
+ [P4_EVENT_BSQ_CACHE_REFERENCE] = {
+ .opcode = P4_OPCODE(P4_EVENT_BSQ_CACHE_REFERENCE),
+ .escr_msr = { MSR_P4_BSU_ESCR0, MSR_P4_BSU_ESCR1 },
+ .cntr = { {0, -1, -1}, {2, -1, -1} },
+ },
+ [P4_EVENT_IOQ_ALLOCATION] = {
+ .opcode = P4_OPCODE(P4_EVENT_IOQ_ALLOCATION),
+ .escr_msr = { MSR_P4_FSB_ESCR0, MSR_P4_FSB_ESCR1 },
+ .cntr = { {0, -1, -1}, {2, -1, -1} },
+ },
+ [P4_EVENT_IOQ_ACTIVE_ENTRIES] = { /* shared ESCR */
+ .opcode = P4_OPCODE(P4_EVENT_IOQ_ACTIVE_ENTRIES),
+ .escr_msr = { MSR_P4_FSB_ESCR1, MSR_P4_FSB_ESCR1 },
+ .cntr = { {2, -1, -1}, {3, -1, -1} },
+ },
+ [P4_EVENT_FSB_DATA_ACTIVITY] = {
+ .opcode = P4_OPCODE(P4_EVENT_FSB_DATA_ACTIVITY),
+ .escr_msr = { MSR_P4_FSB_ESCR0, MSR_P4_FSB_ESCR1 },
+ .cntr = { {0, -1, -1}, {2, -1, -1} },
+ },
+ [P4_EVENT_BSQ_ALLOCATION] = { /* shared ESCR, broken CCCR1 */
+ .opcode = P4_OPCODE(P4_EVENT_BSQ_ALLOCATION),
+ .escr_msr = { MSR_P4_BSU_ESCR0, MSR_P4_BSU_ESCR0 },
+ .cntr = { {0, -1, -1}, {1, -1, -1} },
+ },
+ [P4_EVENT_BSQ_ACTIVE_ENTRIES] = { /* shared ESCR */
+ .opcode = P4_OPCODE(P4_EVENT_BSQ_ACTIVE_ENTRIES),
+ .escr_msr = { MSR_P4_BSU_ESCR1 , MSR_P4_BSU_ESCR1 },
+ .cntr = { {2, -1, -1}, {3, -1, -1} },
+ },
+ [P4_EVENT_SSE_INPUT_ASSIST] = {
+ .opcode = P4_OPCODE(P4_EVENT_SSE_INPUT_ASSIST),
+ .escr_msr = { MSR_P4_FIRM_ESCR0, MSR_P4_FIRM_ESCR1 },
+ .cntr = { {8, 9, -1}, {10, 11, -1} },
+ },
+ [P4_EVENT_PACKED_SP_UOP] = {
+ .opcode = P4_OPCODE(P4_EVENT_PACKED_SP_UOP),
+ .escr_msr = { MSR_P4_FIRM_ESCR0, MSR_P4_FIRM_ESCR1 },
+ .cntr = { {8, 9, -1}, {10, 11, -1} },
+ },
+ [P4_EVENT_PACKED_DP_UOP] = {
+ .opcode = P4_OPCODE(P4_EVENT_PACKED_DP_UOP),
+ .escr_msr = { MSR_P4_FIRM_ESCR0, MSR_P4_FIRM_ESCR1 },
+ .cntr = { {8, 9, -1}, {10, 11, -1} },
+ },
+ [P4_EVENT_SCALAR_SP_UOP] = {
+ .opcode = P4_OPCODE(P4_EVENT_SCALAR_SP_UOP),
+ .escr_msr = { MSR_P4_FIRM_ESCR0, MSR_P4_FIRM_ESCR1 },
+ .cntr = { {8, 9, -1}, {10, 11, -1} },
+ },
+ [P4_EVENT_SCALAR_DP_UOP] = {
+ .opcode = P4_OPCODE(P4_EVENT_SCALAR_DP_UOP),
+ .escr_msr = { MSR_P4_FIRM_ESCR0, MSR_P4_FIRM_ESCR1 },
+ .cntr = { {8, 9, -1}, {10, 11, -1} },
+ },
+ [P4_EVENT_64BIT_MMX_UOP] = {
+ .opcode = P4_OPCODE(P4_EVENT_64BIT_MMX_UOP),
+ .escr_msr = { MSR_P4_FIRM_ESCR0, MSR_P4_FIRM_ESCR1 },
+ .cntr = { {8, 9, -1}, {10, 11, -1} },
+ },
+ [P4_EVENT_128BIT_MMX_UOP] = {
+ .opcode = P4_OPCODE(P4_EVENT_128BIT_MMX_UOP),
+ .escr_msr = { MSR_P4_FIRM_ESCR0, MSR_P4_FIRM_ESCR1 },
+ .cntr = { {8, 9, -1}, {10, 11, -1} },
+ },
+ [P4_EVENT_X87_FP_UOP] = {
+ .opcode = P4_OPCODE(P4_EVENT_X87_FP_UOP),
+ .escr_msr = { MSR_P4_FIRM_ESCR0, MSR_P4_FIRM_ESCR1 },
+ .cntr = { {8, 9, -1}, {10, 11, -1} },
+ },
+ [P4_EVENT_TC_MISC] = {
+ .opcode = P4_OPCODE(P4_EVENT_TC_MISC),
+ .escr_msr = { MSR_P4_TC_ESCR0, MSR_P4_TC_ESCR1 },
+ .cntr = { {4, 5, -1}, {6, 7, -1} },
+ },
+ [P4_EVENT_GLOBAL_POWER_EVENTS] = {
+ .opcode = P4_OPCODE(P4_EVENT_GLOBAL_POWER_EVENTS),
+ .escr_msr = { MSR_P4_FSB_ESCR0, MSR_P4_FSB_ESCR1 },
+ .cntr = { {0, -1, -1}, {2, -1, -1} },
+ },
+ [P4_EVENT_TC_MS_XFER] = {
+ .opcode = P4_OPCODE(P4_EVENT_TC_MS_XFER),
+ .escr_msr = { MSR_P4_MS_ESCR0, MSR_P4_MS_ESCR1 },
+ .cntr = { {4, 5, -1}, {6, 7, -1} },
+ },
+ [P4_EVENT_UOP_QUEUE_WRITES] = {
+ .opcode = P4_OPCODE(P4_EVENT_UOP_QUEUE_WRITES),
+ .escr_msr = { MSR_P4_MS_ESCR0, MSR_P4_MS_ESCR1 },
+ .cntr = { {4, 5, -1}, {6, 7, -1} },
+ },
+ [P4_EVENT_RETIRED_MISPRED_BRANCH_TYPE] = {
+ .opcode = P4_OPCODE(P4_EVENT_RETIRED_MISPRED_BRANCH_TYPE),
+ .escr_msr = { MSR_P4_TBPU_ESCR0 , MSR_P4_TBPU_ESCR0 },
+ .cntr = { {4, 5, -1}, {6, 7, -1} },
+ },
+ [P4_EVENT_RETIRED_BRANCH_TYPE] = {
+ .opcode = P4_OPCODE(P4_EVENT_RETIRED_BRANCH_TYPE),
+ .escr_msr = { MSR_P4_TBPU_ESCR0 , MSR_P4_TBPU_ESCR1 },
+ .cntr = { {4, 5, -1}, {6, 7, -1} },
+ },
+ [P4_EVENT_RESOURCE_STALL] = {
+ .opcode = P4_OPCODE(P4_EVENT_RESOURCE_STALL),
+ .escr_msr = { MSR_P4_ALF_ESCR0, MSR_P4_ALF_ESCR1 },
+ .cntr = { {12, 13, 16}, {14, 15, 17} },
+ },
+ [P4_EVENT_WC_BUFFER] = {
+ .opcode = P4_OPCODE(P4_EVENT_WC_BUFFER),
+ .escr_msr = { MSR_P4_DAC_ESCR0, MSR_P4_DAC_ESCR1 },
+ .cntr = { {8, 9, -1}, {10, 11, -1} },
+ },
+ [P4_EVENT_B2B_CYCLES] = {
+ .opcode = P4_OPCODE(P4_EVENT_B2B_CYCLES),
+ .escr_msr = { MSR_P4_FSB_ESCR0, MSR_P4_FSB_ESCR1 },
+ .cntr = { {0, -1, -1}, {2, -1, -1} },
+ },
+ [P4_EVENT_BNR] = {
+ .opcode = P4_OPCODE(P4_EVENT_BNR),
+ .escr_msr = { MSR_P4_FSB_ESCR0, MSR_P4_FSB_ESCR1 },
+ .cntr = { {0, -1, -1}, {2, -1, -1} },
+ },
+ [P4_EVENT_SNOOP] = {
+ .opcode = P4_OPCODE(P4_EVENT_SNOOP),
+ .escr_msr = { MSR_P4_FSB_ESCR0, MSR_P4_FSB_ESCR1 },
+ .cntr = { {0, -1, -1}, {2, -1, -1} },
+ },
+ [P4_EVENT_RESPONSE] = {
+ .opcode = P4_OPCODE(P4_EVENT_RESPONSE),
+ .escr_msr = { MSR_P4_FSB_ESCR0, MSR_P4_FSB_ESCR1 },
+ .cntr = { {0, -1, -1}, {2, -1, -1} },
+ },
+ [P4_EVENT_FRONT_END_EVENT] = {
+ .opcode = P4_OPCODE(P4_EVENT_FRONT_END_EVENT),
+ .escr_msr = { MSR_P4_CRU_ESCR2, MSR_P4_CRU_ESCR3 },
+ .cntr = { {12, 13, 16}, {14, 15, 17} },
+ },
+ [P4_EVENT_EXECUTION_EVENT] = {
+ .opcode = P4_OPCODE(P4_EVENT_EXECUTION_EVENT),
+ .escr_msr = { MSR_P4_CRU_ESCR2, MSR_P4_CRU_ESCR3 },
+ .cntr = { {12, 13, 16}, {14, 15, 17} },
+ },
+ [P4_EVENT_REPLAY_EVENT] = {
+ .opcode = P4_OPCODE(P4_EVENT_REPLAY_EVENT),
+ .escr_msr = { MSR_P4_CRU_ESCR2, MSR_P4_CRU_ESCR3 },
+ .cntr = { {12, 13, 16}, {14, 15, 17} },
+ },
+ [P4_EVENT_INSTR_RETIRED] = {
+ .opcode = P4_OPCODE(P4_EVENT_INSTR_RETIRED),
+ .escr_msr = { MSR_P4_CRU_ESCR0, MSR_P4_CRU_ESCR1 },
+ .cntr = { {12, 13, 16}, {14, 15, 17} },
+ },
+ [P4_EVENT_UOPS_RETIRED] = {
+ .opcode = P4_OPCODE(P4_EVENT_UOPS_RETIRED),
+ .escr_msr = { MSR_P4_CRU_ESCR0, MSR_P4_CRU_ESCR1 },
+ .cntr = { {12, 13, 16}, {14, 15, 17} },
+ },
+ [P4_EVENT_UOP_TYPE] = {
+ .opcode = P4_OPCODE(P4_EVENT_UOP_TYPE),
+ .escr_msr = { MSR_P4_RAT_ESCR0, MSR_P4_RAT_ESCR1 },
+ .cntr = { {12, 13, 16}, {14, 15, 17} },
+ },
+ [P4_EVENT_BRANCH_RETIRED] = {
+ .opcode = P4_OPCODE(P4_EVENT_BRANCH_RETIRED),
+ .escr_msr = { MSR_P4_CRU_ESCR2, MSR_P4_CRU_ESCR3 },
+ .cntr = { {12, 13, 16}, {14, 15, 17} },
+ },
+ [P4_EVENT_MISPRED_BRANCH_RETIRED] = {
+ .opcode = P4_OPCODE(P4_EVENT_MISPRED_BRANCH_RETIRED),
+ .escr_msr = { MSR_P4_CRU_ESCR0, MSR_P4_CRU_ESCR1 },
+ .cntr = { {12, 13, 16}, {14, 15, 17} },
+ },
+ [P4_EVENT_X87_ASSIST] = {
+ .opcode = P4_OPCODE(P4_EVENT_X87_ASSIST),
+ .escr_msr = { MSR_P4_CRU_ESCR2, MSR_P4_CRU_ESCR3 },
+ .cntr = { {12, 13, 16}, {14, 15, 17} },
+ },
+ [P4_EVENT_MACHINE_CLEAR] = {
+ .opcode = P4_OPCODE(P4_EVENT_MACHINE_CLEAR),
+ .escr_msr = { MSR_P4_CRU_ESCR2, MSR_P4_CRU_ESCR3 },
+ .cntr = { {12, 13, 16}, {14, 15, 17} },
+ },
+ [P4_EVENT_INSTR_COMPLETED] = {
+ .opcode = P4_OPCODE(P4_EVENT_INSTR_COMPLETED),
+ .escr_msr = { MSR_P4_CRU_ESCR0, MSR_P4_CRU_ESCR1 },
+ .cntr = { {12, 13, 16}, {14, 15, 17} },
+ },
+};
+
+#define P4_GEN_CACHE_EVENT(event, bit, cache_event) \
+ p4_config_pack_escr(P4_ESCR_EVENT(event) | \
+ P4_ESCR_EMASK_BIT(event, bit)) | \
+ p4_config_pack_cccr(cache_event | \
+ P4_CCCR_ESEL(P4_OPCODE_ESEL(P4_OPCODE(event))))
+
+static __initconst const u64 p4_hw_cache_event_ids
+ [PERF_COUNT_HW_CACHE_MAX]
+ [PERF_COUNT_HW_CACHE_OP_MAX]
+ [PERF_COUNT_HW_CACHE_RESULT_MAX] =
+{
+ [ C(L1D ) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0x0,
+ [ C(RESULT_MISS) ] = P4_GEN_CACHE_EVENT(P4_EVENT_REPLAY_EVENT, NBOGUS,
+ P4_CACHE__1stl_cache_load_miss_retired),
+ },
+ },
+ [ C(LL ) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0x0,
+ [ C(RESULT_MISS) ] = P4_GEN_CACHE_EVENT(P4_EVENT_REPLAY_EVENT, NBOGUS,
+ P4_CACHE__2ndl_cache_load_miss_retired),
+ },
+},
+ [ C(DTLB) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = 0x0,
+ [ C(RESULT_MISS) ] = P4_GEN_CACHE_EVENT(P4_EVENT_REPLAY_EVENT, NBOGUS,
+ P4_CACHE__dtlb_load_miss_retired),
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = 0x0,
+ [ C(RESULT_MISS) ] = P4_GEN_CACHE_EVENT(P4_EVENT_REPLAY_EVENT, NBOGUS,
+ P4_CACHE__dtlb_store_miss_retired),
+ },
+ },
+ [ C(ITLB) ] = {
+ [ C(OP_READ) ] = {
+ [ C(RESULT_ACCESS) ] = P4_GEN_CACHE_EVENT(P4_EVENT_ITLB_REFERENCE, HIT,
+ P4_CACHE__itlb_reference_hit),
+ [ C(RESULT_MISS) ] = P4_GEN_CACHE_EVENT(P4_EVENT_ITLB_REFERENCE, MISS,
+ P4_CACHE__itlb_reference_miss),
+ },
+ [ C(OP_WRITE) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ [ C(OP_PREFETCH) ] = {
+ [ C(RESULT_ACCESS) ] = -1,
+ [ C(RESULT_MISS) ] = -1,
+ },
+ },
+};
+
+static u64 p4_general_events[PERF_COUNT_HW_MAX] = {
+ /* non-halted CPU clocks */
+ [PERF_COUNT_HW_CPU_CYCLES] =
+ p4_config_pack_escr(P4_ESCR_EVENT(P4_EVENT_GLOBAL_POWER_EVENTS) |
+ P4_ESCR_EMASK_BIT(P4_EVENT_GLOBAL_POWER_EVENTS, RUNNING)),
+
+ /*
+ * retired instructions
+ * in a sake of simplicity we don't use the FSB tagging
+ */
+ [PERF_COUNT_HW_INSTRUCTIONS] =
+ p4_config_pack_escr(P4_ESCR_EVENT(P4_EVENT_INSTR_RETIRED) |
+ P4_ESCR_EMASK_BIT(P4_EVENT_INSTR_RETIRED, NBOGUSNTAG) |
+ P4_ESCR_EMASK_BIT(P4_EVENT_INSTR_RETIRED, BOGUSNTAG)),
+
+ /* cache hits */
+ [PERF_COUNT_HW_CACHE_REFERENCES] =
+ p4_config_pack_escr(P4_ESCR_EVENT(P4_EVENT_BSQ_CACHE_REFERENCE) |
+ P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_CACHE_REFERENCE, RD_2ndL_HITS) |
+ P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_CACHE_REFERENCE, RD_2ndL_HITE) |
+ P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_CACHE_REFERENCE, RD_2ndL_HITM) |
+ P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_CACHE_REFERENCE, RD_3rdL_HITS) |
+ P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_CACHE_REFERENCE, RD_3rdL_HITE) |
+ P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_CACHE_REFERENCE, RD_3rdL_HITM)),
+
+ /* cache misses */
+ [PERF_COUNT_HW_CACHE_MISSES] =
+ p4_config_pack_escr(P4_ESCR_EVENT(P4_EVENT_BSQ_CACHE_REFERENCE) |
+ P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_CACHE_REFERENCE, RD_2ndL_MISS) |
+ P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_CACHE_REFERENCE, RD_3rdL_MISS) |
+ P4_ESCR_EMASK_BIT(P4_EVENT_BSQ_CACHE_REFERENCE, WR_2ndL_MISS)),
+
+ /* branch instructions retired */
+ [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] =
+ p4_config_pack_escr(P4_ESCR_EVENT(P4_EVENT_RETIRED_BRANCH_TYPE) |
+ P4_ESCR_EMASK_BIT(P4_EVENT_RETIRED_BRANCH_TYPE, CONDITIONAL) |
+ P4_ESCR_EMASK_BIT(P4_EVENT_RETIRED_BRANCH_TYPE, CALL) |
+ P4_ESCR_EMASK_BIT(P4_EVENT_RETIRED_BRANCH_TYPE, RETURN) |
+ P4_ESCR_EMASK_BIT(P4_EVENT_RETIRED_BRANCH_TYPE, INDIRECT)),
+
+ /* mispredicted branches retired */
+ [PERF_COUNT_HW_BRANCH_MISSES] =
+ p4_config_pack_escr(P4_ESCR_EVENT(P4_EVENT_MISPRED_BRANCH_RETIRED) |
+ P4_ESCR_EMASK_BIT(P4_EVENT_MISPRED_BRANCH_RETIRED, NBOGUS)),
+
+ /* bus ready clocks (cpu is driving #DRDY_DRV\#DRDY_OWN): */
+ [PERF_COUNT_HW_BUS_CYCLES] =
+ p4_config_pack_escr(P4_ESCR_EVENT(P4_EVENT_FSB_DATA_ACTIVITY) |
+ P4_ESCR_EMASK_BIT(P4_EVENT_FSB_DATA_ACTIVITY, DRDY_DRV) |
+ P4_ESCR_EMASK_BIT(P4_EVENT_FSB_DATA_ACTIVITY, DRDY_OWN)) |
+ p4_config_pack_cccr(P4_CCCR_EDGE | P4_CCCR_COMPARE),
+};
+
+static struct p4_event_bind *p4_config_get_bind(u64 config)
+{
+ unsigned int evnt = p4_config_unpack_event(config);
+ struct p4_event_bind *bind = NULL;
+
+ if (evnt < ARRAY_SIZE(p4_event_bind_map))
+ bind = &p4_event_bind_map[evnt];
+
+ return bind;
+}
+
+static u64 p4_pmu_event_map(int hw_event)
+{
+ struct p4_event_bind *bind;
+ unsigned int esel;
+ u64 config;
+
+ if (hw_event > ARRAY_SIZE(p4_general_events)) {
+ printk_once(KERN_ERR "P4 PMU: Bad index: %i\n", hw_event);
+ return 0;
+ }
+
+ config = p4_general_events[hw_event];
+ bind = p4_config_get_bind(config);
+ esel = P4_OPCODE_ESEL(bind->opcode);
+ config |= p4_config_pack_cccr(P4_CCCR_ESEL(esel));
+
+ return config;
+}
+
+static int p4_hw_config(struct perf_event *event)
+{
+ int cpu = raw_smp_processor_id();
+ u32 escr, cccr;
+
+ /*
+ * the reason we use cpu that early is that: if we get scheduled
+ * first time on the same cpu -- we will not need swap thread
+ * specific flags in config (and will save some cpu cycles)
+ */
+
+ cccr = p4_default_cccr_conf(cpu);
+ escr = p4_default_escr_conf(cpu, event->attr.exclude_kernel,
+ event->attr.exclude_user);
+ event->hw.config = p4_config_pack_escr(escr) |
+ p4_config_pack_cccr(cccr);
+
+ if (p4_ht_active() && p4_ht_thread(cpu))
+ event->hw.config = p4_set_ht_bit(event->hw.config);
+
+ if (event->attr.type != PERF_TYPE_RAW)
+ return 0;
+
+ /*
+ * We don't control raw events so it's up to the caller
+ * to pass sane values (and we don't count the thread number
+ * on HT machine but allow HT-compatible specifics to be
+ * passed on)
+ *
+ * XXX: HT wide things should check perf_paranoid_cpu() &&
+ * CAP_SYS_ADMIN
+ */
+ event->hw.config |= event->attr.config &
+ (p4_config_pack_escr(P4_ESCR_MASK_HT) |
+ p4_config_pack_cccr(P4_CCCR_MASK_HT));
+
+ return 0;
+}
+
+static inline void p4_pmu_clear_cccr_ovf(struct hw_perf_event *hwc)
+{
+ unsigned long dummy;
+
+ rdmsrl(hwc->config_base + hwc->idx, dummy);
+ if (dummy & P4_CCCR_OVF) {
+ (void)checking_wrmsrl(hwc->config_base + hwc->idx,
+ ((u64)dummy) & ~P4_CCCR_OVF);
+ }
+}
+
+static inline void p4_pmu_disable_event(struct perf_event *event)
+{
+ struct hw_perf_event *hwc = &event->hw;
+
+ /*
+ * If event gets disabled while counter is in overflowed
+ * state we need to clear P4_CCCR_OVF, otherwise interrupt get
+ * asserted again and again
+ */
+ (void)checking_wrmsrl(hwc->config_base + hwc->idx,
+ (u64)(p4_config_unpack_cccr(hwc->config)) &
+ ~P4_CCCR_ENABLE & ~P4_CCCR_OVF & ~P4_CCCR_RESERVED);
+}
+
+static void p4_pmu_disable_all(void)
+{
+ struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+ int idx;
+
+ for (idx = 0; idx < x86_pmu.num_counters; idx++) {
+ struct perf_event *event = cpuc->events[idx];
+ if (!test_bit(idx, cpuc->active_mask))
+ continue;
+ p4_pmu_disable_event(event);
+ }
+}
+
+static void p4_pmu_enable_event(struct perf_event *event)
+{
+ struct hw_perf_event *hwc = &event->hw;
+ int thread = p4_ht_config_thread(hwc->config);
+ u64 escr_conf = p4_config_unpack_escr(p4_clear_ht_bit(hwc->config));
+ unsigned int idx = p4_config_unpack_event(hwc->config);
+ unsigned int idx_cache = p4_config_unpack_cache_event(hwc->config);
+ struct p4_event_bind *bind;
+ struct p4_cache_event_bind *bind_cache;
+ u64 escr_addr, cccr;
+
+ bind = &p4_event_bind_map[idx];
+ escr_addr = (u64)bind->escr_msr[thread];
+
+ /*
+ * - we dont support cascaded counters yet
+ * - and counter 1 is broken (erratum)
+ */
+ WARN_ON_ONCE(p4_is_event_cascaded(hwc->config));
+ WARN_ON_ONCE(hwc->idx == 1);
+
+ /* we need a real Event value */
+ escr_conf &= ~P4_ESCR_EVENT_MASK;
+ escr_conf |= P4_ESCR_EVENT(P4_OPCODE_EVNT(bind->opcode));
+
+ cccr = p4_config_unpack_cccr(hwc->config);
+
+ /*
+ * it could be Cache event so that we need to
+ * set metrics into additional MSRs
+ */
+ BUILD_BUG_ON(P4_CACHE__MAX > P4_CCCR_CACHE_OPS_MASK);
+ if (idx_cache > P4_CACHE__NONE &&
+ idx_cache < ARRAY_SIZE(p4_cache_event_bind_map)) {
+ bind_cache = &p4_cache_event_bind_map[idx_cache];
+ (void)checking_wrmsrl(MSR_IA32_PEBS_ENABLE, (u64)bind_cache->metric_pebs);
+ (void)checking_wrmsrl(MSR_P4_PEBS_MATRIX_VERT, (u64)bind_cache->metric_vert);
+ }
+
+ (void)checking_wrmsrl(escr_addr, escr_conf);
+ (void)checking_wrmsrl(hwc->config_base + hwc->idx,
+ (cccr & ~P4_CCCR_RESERVED) | P4_CCCR_ENABLE);
+}
+
+static void p4_pmu_enable_all(int added)
+{
+ struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
+ int idx;
+
+ for (idx = 0; idx < x86_pmu.num_counters; idx++) {
+ struct perf_event *event = cpuc->events[idx];
+ if (!test_bit(idx, cpuc->active_mask))
+ continue;
+ p4_pmu_enable_event(event);
+ }
+}
+
+static int p4_pmu_handle_irq(struct pt_regs *regs)
+{
+ struct perf_sample_data data;
+ struct cpu_hw_events *cpuc;
+ struct perf_event *event;
+ struct hw_perf_event *hwc;
+ int idx, handled = 0;
+ u64 val;
+
+ data.addr = 0;
+ data.raw = NULL;
+
+ cpuc = &__get_cpu_var(cpu_hw_events);
+
+ for (idx = 0; idx < x86_pmu.num_counters; idx++) {
+
+ if (!test_bit(idx, cpuc->active_mask))
+ continue;
+
+ event = cpuc->events[idx];
+ hwc = &event->hw;
+
+ WARN_ON_ONCE(hwc->idx != idx);
+
+ /*
+ * FIXME: Redundant call, actually not needed
+ * but just to check if we're screwed
+ */
+ p4_pmu_clear_cccr_ovf(hwc);
+
+ val = x86_perf_event_update(event);
+ if (val & (1ULL << (x86_pmu.cntval_bits - 1)))
+ continue;
+
+ /*
+ * event overflow
+ */
+ handled = 1;
+ data.period = event->hw.last_period;
+
+ if (!x86_perf_event_set_period(event))
+ continue;
+ if (perf_event_overflow(event, 1, &data, regs))
+ p4_pmu_disable_event(event);
+ }
+
+ if (handled) {
+ /* p4 quirk: unmask it again */
+ apic_write(APIC_LVTPC, apic_read(APIC_LVTPC) & ~APIC_LVT_MASKED);
+ inc_irq_stat(apic_perf_irqs);
+ }
+
+ return handled;
+}
+
+/*
+ * swap thread specific fields according to a thread
+ * we are going to run on
+ */
+static void p4_pmu_swap_config_ts(struct hw_perf_event *hwc, int cpu)
+{
+ u32 escr, cccr;
+
+ /*
+ * we either lucky and continue on same cpu or no HT support
+ */
+ if (!p4_should_swap_ts(hwc->config, cpu))
+ return;
+
+ /*
+ * the event is migrated from an another logical
+ * cpu, so we need to swap thread specific flags
+ */
+
+ escr = p4_config_unpack_escr(hwc->config);
+ cccr = p4_config_unpack_cccr(hwc->config);
+
+ if (p4_ht_thread(cpu)) {
+ cccr &= ~P4_CCCR_OVF_PMI_T0;
+ cccr |= P4_CCCR_OVF_PMI_T1;
+ if (escr & P4_ESCR_T0_OS) {
+ escr &= ~P4_ESCR_T0_OS;
+ escr |= P4_ESCR_T1_OS;
+ }
+ if (escr & P4_ESCR_T0_USR) {
+ escr &= ~P4_ESCR_T0_USR;
+ escr |= P4_ESCR_T1_USR;
+ }
+ hwc->config = p4_config_pack_escr(escr);
+ hwc->config |= p4_config_pack_cccr(cccr);
+ hwc->config |= P4_CONFIG_HT;
+ } else {
+ cccr &= ~P4_CCCR_OVF_PMI_T1;
+ cccr |= P4_CCCR_OVF_PMI_T0;
+ if (escr & P4_ESCR_T1_OS) {
+ escr &= ~P4_ESCR_T1_OS;
+ escr |= P4_ESCR_T0_OS;
+ }
+ if (escr & P4_ESCR_T1_USR) {
+ escr &= ~P4_ESCR_T1_USR;
+ escr |= P4_ESCR_T0_USR;
+ }
+ hwc->config = p4_config_pack_escr(escr);
+ hwc->config |= p4_config_pack_cccr(cccr);
+ hwc->config &= ~P4_CONFIG_HT;
+ }
+}
+
+/* ESCRs are not sequential in memory so we need a map */
+static const unsigned int p4_escr_map[ARCH_P4_TOTAL_ESCR] = {
+ MSR_P4_ALF_ESCR0, /* 0 */
+ MSR_P4_ALF_ESCR1, /* 1 */
+ MSR_P4_BPU_ESCR0, /* 2 */
+ MSR_P4_BPU_ESCR1, /* 3 */
+ MSR_P4_BSU_ESCR0, /* 4 */
+ MSR_P4_BSU_ESCR1, /* 5 */
+ MSR_P4_CRU_ESCR0, /* 6 */
+ MSR_P4_CRU_ESCR1, /* 7 */
+ MSR_P4_CRU_ESCR2, /* 8 */
+ MSR_P4_CRU_ESCR3, /* 9 */
+ MSR_P4_CRU_ESCR4, /* 10 */
+ MSR_P4_CRU_ESCR5, /* 11 */
+ MSR_P4_DAC_ESCR0, /* 12 */
+ MSR_P4_DAC_ESCR1, /* 13 */
+ MSR_P4_FIRM_ESCR0, /* 14 */
+ MSR_P4_FIRM_ESCR1, /* 15 */
+ MSR_P4_FLAME_ESCR0, /* 16 */
+ MSR_P4_FLAME_ESCR1, /* 17 */
+ MSR_P4_FSB_ESCR0, /* 18 */
+ MSR_P4_FSB_ESCR1, /* 19 */
+ MSR_P4_IQ_ESCR0, /* 20 */
+ MSR_P4_IQ_ESCR1, /* 21 */
+ MSR_P4_IS_ESCR0, /* 22 */
+ MSR_P4_IS_ESCR1, /* 23 */
+ MSR_P4_ITLB_ESCR0, /* 24 */
+ MSR_P4_ITLB_ESCR1, /* 25 */
+ MSR_P4_IX_ESCR0, /* 26 */
+ MSR_P4_IX_ESCR1, /* 27 */
+ MSR_P4_MOB_ESCR0, /* 28 */
+ MSR_P4_MOB_ESCR1, /* 29 */
+ MSR_P4_MS_ESCR0, /* 30 */
+ MSR_P4_MS_ESCR1, /* 31 */
+ MSR_P4_PMH_ESCR0, /* 32 */
+ MSR_P4_PMH_ESCR1, /* 33 */
+ MSR_P4_RAT_ESCR0, /* 34 */
+ MSR_P4_RAT_ESCR1, /* 35 */
+ MSR_P4_SAAT_ESCR0, /* 36 */
+ MSR_P4_SAAT_ESCR1, /* 37 */
+ MSR_P4_SSU_ESCR0, /* 38 */
+ MSR_P4_SSU_ESCR1, /* 39 */
+ MSR_P4_TBPU_ESCR0, /* 40 */
+ MSR_P4_TBPU_ESCR1, /* 41 */
+ MSR_P4_TC_ESCR0, /* 42 */
+ MSR_P4_TC_ESCR1, /* 43 */
+ MSR_P4_U2L_ESCR0, /* 44 */
+ MSR_P4_U2L_ESCR1, /* 45 */
+};
+
+static int p4_get_escr_idx(unsigned int addr)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(p4_escr_map); i++) {
+ if (addr == p4_escr_map[i])
+ return i;
+ }
+
+ return -1;
+}
+
+static int p4_next_cntr(int thread, unsigned long *used_mask,
+ struct p4_event_bind *bind)
+{
+ int i = 0, j;
+
+ for (i = 0; i < P4_CNTR_LIMIT; i++) {
+ j = bind->cntr[thread][i++];
+ if (j == -1 || !test_bit(j, used_mask))
+ return j;
+ }
+
+ return -1;
+}
+
+static int p4_pmu_schedule_events(struct cpu_hw_events *cpuc, int n, int *assign)
+{
+ unsigned long used_mask[BITS_TO_LONGS(X86_PMC_IDX_MAX)];
+ unsigned long escr_mask[BITS_TO_LONGS(ARCH_P4_TOTAL_ESCR)];
+ int cpu = raw_smp_processor_id();
+ struct hw_perf_event *hwc;
+ struct p4_event_bind *bind;
+ unsigned int i, thread, num;
+ int cntr_idx, escr_idx;
+
+ bitmap_zero(used_mask, X86_PMC_IDX_MAX);
+ bitmap_zero(escr_mask, ARCH_P4_TOTAL_ESCR);
+
+ for (i = 0, num = n; i < n; i++, num--) {
+
+ hwc = &cpuc->event_list[i]->hw;
+ thread = p4_ht_thread(cpu);
+ bind = p4_config_get_bind(hwc->config);
+ escr_idx = p4_get_escr_idx(bind->escr_msr[thread]);
+
+ if (hwc->idx != -1 && !p4_should_swap_ts(hwc->config, cpu)) {
+ cntr_idx = hwc->idx;
+ if (assign)
+ assign[i] = hwc->idx;
+ goto reserve;
+ }
+
+ cntr_idx = p4_next_cntr(thread, used_mask, bind);
+ if (cntr_idx == -1 || test_bit(escr_idx, escr_mask))
+ goto done;
+
+ p4_pmu_swap_config_ts(hwc, cpu);
+ if (assign)
+ assign[i] = cntr_idx;
+reserve:
+ set_bit(cntr_idx, used_mask);
+ set_bit(escr_idx, escr_mask);
+ }
+
+done:
+ return num ? -ENOSPC : 0;
+}
+
+static __initconst const struct x86_pmu p4_pmu = {
+ .name = "Netburst P4/Xeon",
+ .handle_irq = p4_pmu_handle_irq,
+ .disable_all = p4_pmu_disable_all,
+ .enable_all = p4_pmu_enable_all,
+ .enable = p4_pmu_enable_event,
+ .disable = p4_pmu_disable_event,
+ .eventsel = MSR_P4_BPU_CCCR0,
+ .perfctr = MSR_P4_BPU_PERFCTR0,
+ .event_map = p4_pmu_event_map,
+ .max_events = ARRAY_SIZE(p4_general_events),
+ .get_event_constraints = x86_get_event_constraints,
+ /*
+ * IF HT disabled we may need to use all
+ * ARCH_P4_MAX_CCCR counters simulaneously
+ * though leave it restricted at moment assuming
+ * HT is on
+ */
+ .num_counters = ARCH_P4_MAX_CCCR,
+ .apic = 1,
+ .cntval_bits = 40,
+ .cntval_mask = (1ULL << 40) - 1,
+ .max_period = (1ULL << 39) - 1,
+ .hw_config = p4_hw_config,
+ .schedule_events = p4_pmu_schedule_events,
+};
+
+static __init int p4_pmu_init(void)
+{
+ unsigned int low, high;
+
+ /* If we get stripped -- indexig fails */
+ BUILD_BUG_ON(ARCH_P4_MAX_CCCR > X86_PMC_MAX_GENERIC);
+
+ rdmsr(MSR_IA32_MISC_ENABLE, low, high);
+ if (!(low & (1 << 7))) {
+ pr_cont("unsupported Netburst CPU model %d ",
+ boot_cpu_data.x86_model);
+ return -ENODEV;
+ }
+
+ memcpy(hw_cache_event_ids, p4_hw_cache_event_ids,
+ sizeof(hw_cache_event_ids));
+
+ pr_cont("Netburst events, ");
+
+ x86_pmu = p4_pmu;
+
+ return 0;
+}
+
+#endif /* CONFIG_CPU_SUP_INTEL */
diff --git a/arch/x86/kernel/cpu/perf_event_p6.c b/arch/x86/kernel/cpu/perf_event_p6.c
index a330485..34ba07b 100644
--- a/arch/x86/kernel/cpu/perf_event_p6.c
+++ b/arch/x86/kernel/cpu/perf_event_p6.c
@@ -27,24 +27,6 @@ static u64 p6_pmu_event_map(int hw_event)
*/
#define P6_NOP_EVENT 0x0000002EULL
-static u64 p6_pmu_raw_event(u64 hw_event)
-{
-#define P6_EVNTSEL_EVENT_MASK 0x000000FFULL
-#define P6_EVNTSEL_UNIT_MASK 0x0000FF00ULL
-#define P6_EVNTSEL_EDGE_MASK 0x00040000ULL
-#define P6_EVNTSEL_INV_MASK 0x00800000ULL
-#define P6_EVNTSEL_REG_MASK 0xFF000000ULL
-
-#define P6_EVNTSEL_MASK \
- (P6_EVNTSEL_EVENT_MASK | \
- P6_EVNTSEL_UNIT_MASK | \
- P6_EVNTSEL_EDGE_MASK | \
- P6_EVNTSEL_INV_MASK | \
- P6_EVNTSEL_REG_MASK)
-
- return hw_event & P6_EVNTSEL_MASK;
-}
-
static struct event_constraint p6_event_constraints[] =
{
INTEL_EVENT_CONSTRAINT(0xc1, 0x1), /* FLOPS */
@@ -66,7 +48,7 @@ static void p6_pmu_disable_all(void)
wrmsrl(MSR_P6_EVNTSEL0, val);
}
-static void p6_pmu_enable_all(void)
+static void p6_pmu_enable_all(int added)
{
unsigned long val;
@@ -102,22 +84,23 @@ static void p6_pmu_enable_event(struct perf_event *event)
(void)checking_wrmsrl(hwc->config_base + hwc->idx, val);
}
-static __initconst struct x86_pmu p6_pmu = {
+static __initconst const struct x86_pmu p6_pmu = {
.name = "p6",
.handle_irq = x86_pmu_handle_irq,
.disable_all = p6_pmu_disable_all,
.enable_all = p6_pmu_enable_all,
.enable = p6_pmu_enable_event,
.disable = p6_pmu_disable_event,
+ .hw_config = x86_pmu_hw_config,
+ .schedule_events = x86_schedule_events,
.eventsel = MSR_P6_EVNTSEL0,
.perfctr = MSR_P6_PERFCTR0,
.event_map = p6_pmu_event_map,
- .raw_event = p6_pmu_raw_event,
.max_events = ARRAY_SIZE(p6_perfmon_event_map),
.apic = 1,
.max_period = (1ULL << 31) - 1,
.version = 0,
- .num_events = 2,
+ .num_counters = 2,
/*
* Events have 40 bits implemented. However they are designed such
* that bits [32-39] are sign extensions of bit 31. As such the
@@ -125,8 +108,8 @@ static __initconst struct x86_pmu p6_pmu = {
*
* See IA-32 Intel Architecture Software developer manual Vol 3B
*/
- .event_bits = 32,
- .event_mask = (1ULL << 32) - 1,
+ .cntval_bits = 32,
+ .cntval_mask = (1ULL << 32) - 1,
.get_event_constraints = x86_get_event_constraints,
.event_constraints = p6_event_constraints,
};
diff --git a/arch/x86/kernel/ds.c b/arch/x86/kernel/ds.c
deleted file mode 100644
index 1c47390..0000000
--- a/arch/x86/kernel/ds.c
+++ /dev/null
@@ -1,1437 +0,0 @@
-/*
- * Debug Store support
- *
- * This provides a low-level interface to the hardware's Debug Store
- * feature that is used for branch trace store (BTS) and
- * precise-event based sampling (PEBS).
- *
- * It manages:
- * - DS and BTS hardware configuration
- * - buffer overflow handling (to be done)
- * - buffer access
- *
- * It does not do:
- * - security checking (is the caller allowed to trace the task)
- * - buffer allocation (memory accounting)
- *
- *
- * Copyright (C) 2007-2009 Intel Corporation.
- * Markus Metzger <markus.t.metzger@intel.com>, 2007-2009
- */
-
-#include <linux/kernel.h>
-#include <linux/string.h>
-#include <linux/errno.h>
-#include <linux/sched.h>
-#include <linux/slab.h>
-#include <linux/mm.h>
-#include <linux/trace_clock.h>
-
-#include <asm/ds.h>
-
-#include "ds_selftest.h"
-
-/*
- * The configuration for a particular DS hardware implementation:
- */
-struct ds_configuration {
- /* The name of the configuration: */
- const char *name;
-
- /* The size of pointer-typed fields in DS, BTS, and PEBS: */
- unsigned char sizeof_ptr_field;
-
- /* The size of a BTS/PEBS record in bytes: */
- unsigned char sizeof_rec[2];
-
- /* The number of pebs counter reset values in the DS structure. */
- unsigned char nr_counter_reset;
-
- /* Control bit-masks indexed by enum ds_feature: */
- unsigned long ctl[dsf_ctl_max];
-};
-static struct ds_configuration ds_cfg __read_mostly;
-
-
-/* Maximal size of a DS configuration: */
-#define MAX_SIZEOF_DS 0x80
-
-/* Maximal size of a BTS record: */
-#define MAX_SIZEOF_BTS (3 * 8)
-
-/* BTS and PEBS buffer alignment: */
-#define DS_ALIGNMENT (1 << 3)
-
-/* Number of buffer pointers in DS: */
-#define NUM_DS_PTR_FIELDS 8
-
-/* Size of a pebs reset value in DS: */
-#define PEBS_RESET_FIELD_SIZE 8
-
-/* Mask of control bits in the DS MSR register: */
-#define BTS_CONTROL \
- ( ds_cfg.ctl[dsf_bts] | \
- ds_cfg.ctl[dsf_bts_kernel] | \
- ds_cfg.ctl[dsf_bts_user] | \
- ds_cfg.ctl[dsf_bts_overflow] )
-
-/*
- * A BTS or PEBS tracer.
- *
- * This holds the configuration of the tracer and serves as a handle
- * to identify tracers.
- */
-struct ds_tracer {
- /* The DS context (partially) owned by this tracer. */
- struct ds_context *context;
- /* The buffer provided on ds_request() and its size in bytes. */
- void *buffer;
- size_t size;
-};
-
-struct bts_tracer {
- /* The common DS part: */
- struct ds_tracer ds;
-
- /* The trace including the DS configuration: */
- struct bts_trace trace;
-
- /* Buffer overflow notification function: */
- bts_ovfl_callback_t ovfl;
-
- /* Active flags affecting trace collection. */
- unsigned int flags;
-};
-
-struct pebs_tracer {
- /* The common DS part: */
- struct ds_tracer ds;
-
- /* The trace including the DS configuration: */
- struct pebs_trace trace;
-
- /* Buffer overflow notification function: */
- pebs_ovfl_callback_t ovfl;
-};
-
-/*
- * Debug Store (DS) save area configuration (see Intel64 and IA32
- * Architectures Software Developer's Manual, section 18.5)
- *
- * The DS configuration consists of the following fields; different
- * architetures vary in the size of those fields.
- *
- * - double-word aligned base linear address of the BTS buffer
- * - write pointer into the BTS buffer
- * - end linear address of the BTS buffer (one byte beyond the end of
- * the buffer)
- * - interrupt pointer into BTS buffer
- * (interrupt occurs when write pointer passes interrupt pointer)
- * - double-word aligned base linear address of the PEBS buffer
- * - write pointer into the PEBS buffer
- * - end linear address of the PEBS buffer (one byte beyond the end of
- * the buffer)
- * - interrupt pointer into PEBS buffer
- * (interrupt occurs when write pointer passes interrupt pointer)
- * - value to which counter is reset following counter overflow
- *
- * Later architectures use 64bit pointers throughout, whereas earlier
- * architectures use 32bit pointers in 32bit mode.
- *
- *
- * We compute the base address for the first 8 fields based on:
- * - the field size stored in the DS configuration
- * - the relative field position
- * - an offset giving the start of the respective region
- *
- * This offset is further used to index various arrays holding
- * information for BTS and PEBS at the respective index.
- *
- * On later 32bit processors, we only access the lower 32bit of the
- * 64bit pointer fields. The upper halves will be zeroed out.
- */
-
-enum ds_field {
- ds_buffer_base = 0,
- ds_index,
- ds_absolute_maximum,
- ds_interrupt_threshold,
-};
-
-enum ds_qualifier {
- ds_bts = 0,
- ds_pebs
-};
-
-static inline unsigned long
-ds_get(const unsigned char *base, enum ds_qualifier qual, enum ds_field field)
-{
- base += (ds_cfg.sizeof_ptr_field * (field + (4 * qual)));
- return *(unsigned long *)base;
-}
-
-static inline void
-ds_set(unsigned char *base, enum ds_qualifier qual, enum ds_field field,
- unsigned long value)
-{
- base += (ds_cfg.sizeof_ptr_field * (field + (4 * qual)));
- (*(unsigned long *)base) = value;
-}
-
-
-/*
- * Locking is done only for allocating BTS or PEBS resources.
- */
-static DEFINE_SPINLOCK(ds_lock);
-
-/*
- * We either support (system-wide) per-cpu or per-thread allocation.
- * We distinguish the two based on the task_struct pointer, where a
- * NULL pointer indicates per-cpu allocation for the current cpu.
- *
- * Allocations are use-counted. As soon as resources are allocated,
- * further allocations must be of the same type (per-cpu or
- * per-thread). We model this by counting allocations (i.e. the number
- * of tracers of a certain type) for one type negatively:
- * =0 no tracers
- * >0 number of per-thread tracers
- * <0 number of per-cpu tracers
- *
- * Tracers essentially gives the number of ds contexts for a certain
- * type of allocation.
- */
-static atomic_t tracers = ATOMIC_INIT(0);
-
-static inline int get_tracer(struct task_struct *task)
-{
- int error;
-
- spin_lock_irq(&ds_lock);
-
- if (task) {
- error = -EPERM;
- if (atomic_read(&tracers) < 0)
- goto out;
- atomic_inc(&tracers);
- } else {
- error = -EPERM;
- if (atomic_read(&tracers) > 0)
- goto out;
- atomic_dec(&tracers);
- }
-
- error = 0;
-out:
- spin_unlock_irq(&ds_lock);
- return error;
-}
-
-static inline void put_tracer(struct task_struct *task)
-{
- if (task)
- atomic_dec(&tracers);
- else
- atomic_inc(&tracers);
-}
-
-/*
- * The DS context is either attached to a thread or to a cpu:
- * - in the former case, the thread_struct contains a pointer to the
- * attached context.
- * - in the latter case, we use a static array of per-cpu context
- * pointers.
- *
- * Contexts are use-counted. They are allocated on first access and
- * deallocated when the last user puts the context.
- */
-struct ds_context {
- /* The DS configuration; goes into MSR_IA32_DS_AREA: */
- unsigned char ds[MAX_SIZEOF_DS];
-
- /* The owner of the BTS and PEBS configuration, respectively: */
- struct bts_tracer *bts_master;
- struct pebs_tracer *pebs_master;
-
- /* Use count: */
- unsigned long count;
-
- /* Pointer to the context pointer field: */
- struct ds_context **this;
-
- /* The traced task; NULL for cpu tracing: */
- struct task_struct *task;
-
- /* The traced cpu; only valid if task is NULL: */
- int cpu;
-};
-
-static DEFINE_PER_CPU(struct ds_context *, cpu_ds_context);
-
-
-static struct ds_context *ds_get_context(struct task_struct *task, int cpu)
-{
- struct ds_context **p_context =
- (task ? &task->thread.ds_ctx : &per_cpu(cpu_ds_context, cpu));
- struct ds_context *context = NULL;
- struct ds_context *new_context = NULL;
-
- /* Chances are small that we already have a context. */
- new_context = kzalloc(sizeof(*new_context), GFP_KERNEL);
- if (!new_context)
- return NULL;
-
- spin_lock_irq(&ds_lock);
-
- context = *p_context;
- if (likely(!context)) {
- context = new_context;
-
- context->this = p_context;
- context->task = task;
- context->cpu = cpu;
- context->count = 0;
-
- *p_context = context;
- }
-
- context->count++;
-
- spin_unlock_irq(&ds_lock);
-
- if (context != new_context)
- kfree(new_context);
-
- return context;
-}
-
-static void ds_put_context(struct ds_context *context)
-{
- struct task_struct *task;
- unsigned long irq;
-
- if (!context)
- return;
-
- spin_lock_irqsave(&ds_lock, irq);
-
- if (--context->count) {
- spin_unlock_irqrestore(&ds_lock, irq);
- return;
- }
-
- *(context->this) = NULL;
-
- task = context->task;
-
- if (task)
- clear_tsk_thread_flag(task, TIF_DS_AREA_MSR);
-
- /*
- * We leave the (now dangling) pointer to the DS configuration in
- * the DS_AREA msr. This is as good or as bad as replacing it with
- * NULL - the hardware would crash if we enabled tracing.
- *
- * This saves us some problems with having to write an msr on a
- * different cpu while preventing others from doing the same for the
- * next context for that same cpu.
- */
-
- spin_unlock_irqrestore(&ds_lock, irq);
-
- /* The context might still be in use for context switching. */
- if (task && (task != current))
- wait_task_context_switch(task);
-
- kfree(context);
-}
-
-static void ds_install_ds_area(struct ds_context *context)
-{
- unsigned long ds;
-
- ds = (unsigned long)context->ds;
-
- /*
- * There is a race between the bts master and the pebs master.
- *
- * The thread/cpu access is synchronized via get/put_cpu() for
- * task tracing and via wrmsr_on_cpu for cpu tracing.
- *
- * If bts and pebs are collected for the same task or same cpu,
- * the same confiuration is written twice.
- */
- if (context->task) {
- get_cpu();
- if (context->task == current)
- wrmsrl(MSR_IA32_DS_AREA, ds);
- set_tsk_thread_flag(context->task, TIF_DS_AREA_MSR);
- put_cpu();
- } else
- wrmsr_on_cpu(context->cpu, MSR_IA32_DS_AREA,
- (u32)((u64)ds), (u32)((u64)ds >> 32));
-}
-
-/*
- * Call the tracer's callback on a buffer overflow.
- *
- * context: the ds context
- * qual: the buffer type
- */
-static void ds_overflow(struct ds_context *context, enum ds_qualifier qual)
-{
- switch (qual) {
- case ds_bts:
- if (context->bts_master &&
- context->bts_master->ovfl)
- context->bts_master->ovfl(context->bts_master);
- break;
- case ds_pebs:
- if (context->pebs_master &&
- context->pebs_master->ovfl)
- context->pebs_master->ovfl(context->pebs_master);
- break;
- }
-}
-
-
-/*
- * Write raw data into the BTS or PEBS buffer.
- *
- * The remainder of any partially written record is zeroed out.
- *
- * context: the DS context
- * qual: the buffer type
- * record: the data to write
- * size: the size of the data
- */
-static int ds_write(struct ds_context *context, enum ds_qualifier qual,
- const void *record, size_t size)
-{
- int bytes_written = 0;
-
- if (!record)
- return -EINVAL;
-
- while (size) {
- unsigned long base, index, end, write_end, int_th;
- unsigned long write_size, adj_write_size;
-
- /*
- * Write as much as possible without producing an
- * overflow interrupt.
- *
- * Interrupt_threshold must either be
- * - bigger than absolute_maximum or
- * - point to a record between buffer_base and absolute_maximum
- *
- * Index points to a valid record.
- */
- base = ds_get(context->ds, qual, ds_buffer_base);
- index = ds_get(context->ds, qual, ds_index);
- end = ds_get(context->ds, qual, ds_absolute_maximum);
- int_th = ds_get(context->ds, qual, ds_interrupt_threshold);
-
- write_end = min(end, int_th);
-
- /*
- * If we are already beyond the interrupt threshold,
- * we fill the entire buffer.
- */
- if (write_end <= index)
- write_end = end;
-
- if (write_end <= index)
- break;
-
- write_size = min((unsigned long) size, write_end - index);
- memcpy((void *)index, record, write_size);
-
- record = (const char *)record + write_size;
- size -= write_size;
- bytes_written += write_size;
-
- adj_write_size = write_size / ds_cfg.sizeof_rec[qual];
- adj_write_size *= ds_cfg.sizeof_rec[qual];
-
- /* Zero out trailing bytes. */
- memset((char *)index + write_size, 0,
- adj_write_size - write_size);
- index += adj_write_size;
-
- if (index >= end)
- index = base;
- ds_set(context->ds, qual, ds_index, index);
-
- if (index >= int_th)
- ds_overflow(context, qual);
- }
-
- return bytes_written;
-}
-
-
-/*
- * Branch Trace Store (BTS) uses the following format. Different
- * architectures vary in the size of those fields.
- * - source linear address
- * - destination linear address
- * - flags
- *
- * Later architectures use 64bit pointers throughout, whereas earlier
- * architectures use 32bit pointers in 32bit mode.
- *
- * We compute the base address for the fields based on:
- * - the field size stored in the DS configuration
- * - the relative field position
- *
- * In order to store additional information in the BTS buffer, we use
- * a special source address to indicate that the record requires
- * special interpretation.
- *
- * Netburst indicated via a bit in the flags field whether the branch
- * was predicted; this is ignored.
- *
- * We use two levels of abstraction:
- * - the raw data level defined here
- * - an arch-independent level defined in ds.h
- */
-
-enum bts_field {
- bts_from,
- bts_to,
- bts_flags,
-
- bts_qual = bts_from,
- bts_clock = bts_to,
- bts_pid = bts_flags,
-
- bts_qual_mask = (bts_qual_max - 1),
- bts_escape = ((unsigned long)-1 & ~bts_qual_mask)
-};
-
-static inline unsigned long bts_get(const char *base, unsigned long field)
-{
- base += (ds_cfg.sizeof_ptr_field * field);
- return *(unsigned long *)base;
-}
-
-static inline void bts_set(char *base, unsigned long field, unsigned long val)
-{
- base += (ds_cfg.sizeof_ptr_field * field);
- (*(unsigned long *)base) = val;
-}
-
-
-/*
- * The raw BTS data is architecture dependent.
- *
- * For higher-level users, we give an arch-independent view.
- * - ds.h defines struct bts_struct
- * - bts_read translates one raw bts record into a bts_struct
- * - bts_write translates one bts_struct into the raw format and
- * writes it into the top of the parameter tracer's buffer.
- *
- * return: bytes read/written on success; -Eerrno, otherwise
- */
-static int
-bts_read(struct bts_tracer *tracer, const void *at, struct bts_struct *out)
-{
- if (!tracer)
- return -EINVAL;
-
- if (at < tracer->trace.ds.begin)
- return -EINVAL;
-
- if (tracer->trace.ds.end < (at + tracer->trace.ds.size))
- return -EINVAL;
-
- memset(out, 0, sizeof(*out));
- if ((bts_get(at, bts_qual) & ~bts_qual_mask) == bts_escape) {
- out->qualifier = (bts_get(at, bts_qual) & bts_qual_mask);
- out->variant.event.clock = bts_get(at, bts_clock);
- out->variant.event.pid = bts_get(at, bts_pid);
- } else {
- out->qualifier = bts_branch;
- out->variant.lbr.from = bts_get(at, bts_from);
- out->variant.lbr.to = bts_get(at, bts_to);
-
- if (!out->variant.lbr.from && !out->variant.lbr.to)
- out->qualifier = bts_invalid;
- }
-
- return ds_cfg.sizeof_rec[ds_bts];
-}
-
-static int bts_write(struct bts_tracer *tracer, const struct bts_struct *in)
-{
- unsigned char raw[MAX_SIZEOF_BTS];
-
- if (!tracer)
- return -EINVAL;
-
- if (MAX_SIZEOF_BTS < ds_cfg.sizeof_rec[ds_bts])
- return -EOVERFLOW;
-
- switch (in->qualifier) {
- case bts_invalid:
- bts_set(raw, bts_from, 0);
- bts_set(raw, bts_to, 0);
- bts_set(raw, bts_flags, 0);
- break;
- case bts_branch:
- bts_set(raw, bts_from, in->variant.lbr.from);
- bts_set(raw, bts_to, in->variant.lbr.to);
- bts_set(raw, bts_flags, 0);
- break;
- case bts_task_arrives:
- case bts_task_departs:
- bts_set(raw, bts_qual, (bts_escape | in->qualifier));
- bts_set(raw, bts_clock, in->variant.event.clock);
- bts_set(raw, bts_pid, in->variant.event.pid);
- break;
- default:
- return -EINVAL;
- }
-
- return ds_write(tracer->ds.context, ds_bts, raw,
- ds_cfg.sizeof_rec[ds_bts]);
-}
-
-
-static void ds_write_config(struct ds_context *context,
- struct ds_trace *cfg, enum ds_qualifier qual)
-{
- unsigned char *ds = context->ds;
-
- ds_set(ds, qual, ds_buffer_base, (unsigned long)cfg->begin);
- ds_set(ds, qual, ds_index, (unsigned long)cfg->top);
- ds_set(ds, qual, ds_absolute_maximum, (unsigned long)cfg->end);
- ds_set(ds, qual, ds_interrupt_threshold, (unsigned long)cfg->ith);
-}
-
-static void ds_read_config(struct ds_context *context,
- struct ds_trace *cfg, enum ds_qualifier qual)
-{
- unsigned char *ds = context->ds;
-
- cfg->begin = (void *)ds_get(ds, qual, ds_buffer_base);
- cfg->top = (void *)ds_get(ds, qual, ds_index);
- cfg->end = (void *)ds_get(ds, qual, ds_absolute_maximum);
- cfg->ith = (void *)ds_get(ds, qual, ds_interrupt_threshold);
-}
-
-static void ds_init_ds_trace(struct ds_trace *trace, enum ds_qualifier qual,
- void *base, size_t size, size_t ith,
- unsigned int flags) {
- unsigned long buffer, adj;
-
- /*
- * Adjust the buffer address and size to meet alignment
- * constraints:
- * - buffer is double-word aligned
- * - size is multiple of record size
- *
- * We checked the size at the very beginning; we have enough
- * space to do the adjustment.
- */
- buffer = (unsigned long)base;
-
- adj = ALIGN(buffer, DS_ALIGNMENT) - buffer;
- buffer += adj;
- size -= adj;
-
- trace->n = size / ds_cfg.sizeof_rec[qual];
- trace->size = ds_cfg.sizeof_rec[qual];
-
- size = (trace->n * trace->size);
-
- trace->begin = (void *)buffer;
- trace->top = trace->begin;
- trace->end = (void *)(buffer + size);
- /*
- * The value for 'no threshold' is -1, which will set the
- * threshold outside of the buffer, just like we want it.
- */
- ith *= ds_cfg.sizeof_rec[qual];
- trace->ith = (void *)(buffer + size - ith);
-
- trace->flags = flags;
-}
-
-
-static int ds_request(struct ds_tracer *tracer, struct ds_trace *trace,
- enum ds_qualifier qual, struct task_struct *task,
- int cpu, void *base, size_t size, size_t th)
-{
- struct ds_context *context;
- int error;
- size_t req_size;
-
- error = -EOPNOTSUPP;
- if (!ds_cfg.sizeof_rec[qual])
- goto out;
-
- error = -EINVAL;
- if (!base)
- goto out;
-
- req_size = ds_cfg.sizeof_rec[qual];
- /* We might need space for alignment adjustments. */
- if (!IS_ALIGNED((unsigned long)base, DS_ALIGNMENT))
- req_size += DS_ALIGNMENT;
-
- error = -EINVAL;
- if (size < req_size)
- goto out;
-
- if (th != (size_t)-1) {
- th *= ds_cfg.sizeof_rec[qual];
-
- error = -EINVAL;
- if (size <= th)
- goto out;
- }
-
- tracer->buffer = base;
- tracer->size = size;
-
- error = -ENOMEM;
- context = ds_get_context(task, cpu);
- if (!context)
- goto out;
- tracer->context = context;
-
- /*
- * Defer any tracer-specific initialization work for the context until
- * context ownership has been clarified.
- */
-
- error = 0;
- out:
- return error;
-}
-
-static struct bts_tracer *ds_request_bts(struct task_struct *task, int cpu,
- void *base, size_t size,
- bts_ovfl_callback_t ovfl, size_t th,
- unsigned int flags)
-{
- struct bts_tracer *tracer;
- int error;
-
- /* Buffer overflow notification is not yet implemented. */
- error = -EOPNOTSUPP;
- if (ovfl)
- goto out;
-
- error = get_tracer(task);
- if (error < 0)
- goto out;
-
- error = -ENOMEM;
- tracer = kzalloc(sizeof(*tracer), GFP_KERNEL);
- if (!tracer)
- goto out_put_tracer;
- tracer->ovfl = ovfl;
-
- /* Do some more error checking and acquire a tracing context. */
- error = ds_request(&tracer->ds, &tracer->trace.ds,
- ds_bts, task, cpu, base, size, th);
- if (error < 0)
- goto out_tracer;
-
- /* Claim the bts part of the tracing context we acquired above. */
- spin_lock_irq(&ds_lock);
-
- error = -EPERM;
- if (tracer->ds.context->bts_master)
- goto out_unlock;
- tracer->ds.context->bts_master = tracer;
-
- spin_unlock_irq(&ds_lock);
-
- /*
- * Now that we own the bts part of the context, let's complete the
- * initialization for that part.
- */
- ds_init_ds_trace(&tracer->trace.ds, ds_bts, base, size, th, flags);
- ds_write_config(tracer->ds.context, &tracer->trace.ds, ds_bts);
- ds_install_ds_area(tracer->ds.context);
-
- tracer->trace.read = bts_read;
- tracer->trace.write = bts_write;
-
- /* Start tracing. */
- ds_resume_bts(tracer);
-
- return tracer;
-
- out_unlock:
- spin_unlock_irq(&ds_lock);
- ds_put_context(tracer->ds.context);
- out_tracer:
- kfree(tracer);
- out_put_tracer:
- put_tracer(task);
- out:
- return ERR_PTR(error);
-}
-
-struct bts_tracer *ds_request_bts_task(struct task_struct *task,
- void *base, size_t size,
- bts_ovfl_callback_t ovfl,
- size_t th, unsigned int flags)
-{
- return ds_request_bts(task, 0, base, size, ovfl, th, flags);
-}
-
-struct bts_tracer *ds_request_bts_cpu(int cpu, void *base, size_t size,
- bts_ovfl_callback_t ovfl,
- size_t th, unsigned int flags)
-{
- return ds_request_bts(NULL, cpu, base, size, ovfl, th, flags);
-}
-
-static struct pebs_tracer *ds_request_pebs(struct task_struct *task, int cpu,
- void *base, size_t size,
- pebs_ovfl_callback_t ovfl, size_t th,
- unsigned int flags)
-{
- struct pebs_tracer *tracer;
- int error;
-
- /* Buffer overflow notification is not yet implemented. */
- error = -EOPNOTSUPP;
- if (ovfl)
- goto out;
-
- error = get_tracer(task);
- if (error < 0)
- goto out;
-
- error = -ENOMEM;
- tracer = kzalloc(sizeof(*tracer), GFP_KERNEL);
- if (!tracer)
- goto out_put_tracer;
- tracer->ovfl = ovfl;
-
- /* Do some more error checking and acquire a tracing context. */
- error = ds_request(&tracer->ds, &tracer->trace.ds,
- ds_pebs, task, cpu, base, size, th);
- if (error < 0)
- goto out_tracer;
-
- /* Claim the pebs part of the tracing context we acquired above. */
- spin_lock_irq(&ds_lock);
-
- error = -EPERM;
- if (tracer->ds.context->pebs_master)
- goto out_unlock;
- tracer->ds.context->pebs_master = tracer;
-
- spin_unlock_irq(&ds_lock);
-
- /*
- * Now that we own the pebs part of the context, let's complete the
- * initialization for that part.
- */
- ds_init_ds_trace(&tracer->trace.ds, ds_pebs, base, size, th, flags);
- ds_write_config(tracer->ds.context, &tracer->trace.ds, ds_pebs);
- ds_install_ds_area(tracer->ds.context);
-
- /* Start tracing. */
- ds_resume_pebs(tracer);
-
- return tracer;
-
- out_unlock:
- spin_unlock_irq(&ds_lock);
- ds_put_context(tracer->ds.context);
- out_tracer:
- kfree(tracer);
- out_put_tracer:
- put_tracer(task);
- out:
- return ERR_PTR(error);
-}
-
-struct pebs_tracer *ds_request_pebs_task(struct task_struct *task,
- void *base, size_t size,
- pebs_ovfl_callback_t ovfl,
- size_t th, unsigned int flags)
-{
- return ds_request_pebs(task, 0, base, size, ovfl, th, flags);
-}
-
-struct pebs_tracer *ds_request_pebs_cpu(int cpu, void *base, size_t size,
- pebs_ovfl_callback_t ovfl,
- size_t th, unsigned int flags)
-{
- return ds_request_pebs(NULL, cpu, base, size, ovfl, th, flags);
-}
-
-static void ds_free_bts(struct bts_tracer *tracer)
-{
- struct task_struct *task;
-
- task = tracer->ds.context->task;
-
- WARN_ON_ONCE(tracer->ds.context->bts_master != tracer);
- tracer->ds.context->bts_master = NULL;
-
- /* Make sure tracing stopped and the tracer is not in use. */
- if (task && (task != current))
- wait_task_context_switch(task);
-
- ds_put_context(tracer->ds.context);
- put_tracer(task);
-
- kfree(tracer);
-}
-
-void ds_release_bts(struct bts_tracer *tracer)
-{
- might_sleep();
-
- if (!tracer)
- return;
-
- ds_suspend_bts(tracer);
- ds_free_bts(tracer);
-}
-
-int ds_release_bts_noirq(struct bts_tracer *tracer)
-{
- struct task_struct *task;
- unsigned long irq;
- int error;
-
- if (!tracer)
- return 0;
-
- task = tracer->ds.context->task;
-
- local_irq_save(irq);
-
- error = -EPERM;
- if (!task &&
- (tracer->ds.context->cpu != smp_processor_id()))
- goto out;
-
- error = -EPERM;
- if (task && (task != current))
- goto out;
-
- ds_suspend_bts_noirq(tracer);
- ds_free_bts(tracer);
-
- error = 0;
- out:
- local_irq_restore(irq);
- return error;
-}
-
-static void update_task_debugctlmsr(struct task_struct *task,
- unsigned long debugctlmsr)
-{
- task->thread.debugctlmsr = debugctlmsr;
-
- get_cpu();
- if (task == current)
- update_debugctlmsr(debugctlmsr);
- put_cpu();
-}
-
-void ds_suspend_bts(struct bts_tracer *tracer)
-{
- struct task_struct *task;
- unsigned long debugctlmsr;
- int cpu;
-
- if (!tracer)
- return;
-
- tracer->flags = 0;
-
- task = tracer->ds.context->task;
- cpu = tracer->ds.context->cpu;
-
- WARN_ON(!task && irqs_disabled());
-
- debugctlmsr = (task ?
- task->thread.debugctlmsr :
- get_debugctlmsr_on_cpu(cpu));
- debugctlmsr &= ~BTS_CONTROL;
-
- if (task)
- update_task_debugctlmsr(task, debugctlmsr);
- else
- update_debugctlmsr_on_cpu(cpu, debugctlmsr);
-}
-
-int ds_suspend_bts_noirq(struct bts_tracer *tracer)
-{
- struct task_struct *task;
- unsigned long debugctlmsr, irq;
- int cpu, error = 0;
-
- if (!tracer)
- return 0;
-
- tracer->flags = 0;
-
- task = tracer->ds.context->task;
- cpu = tracer->ds.context->cpu;
-
- local_irq_save(irq);
-
- error = -EPERM;
- if (!task && (cpu != smp_processor_id()))
- goto out;
-
- debugctlmsr = (task ?
- task->thread.debugctlmsr :
- get_debugctlmsr());
- debugctlmsr &= ~BTS_CONTROL;
-
- if (task)
- update_task_debugctlmsr(task, debugctlmsr);
- else
- update_debugctlmsr(debugctlmsr);
-
- error = 0;
- out:
- local_irq_restore(irq);
- return error;
-}
-
-static unsigned long ds_bts_control(struct bts_tracer *tracer)
-{
- unsigned long control;
-
- control = ds_cfg.ctl[dsf_bts];
- if (!(tracer->trace.ds.flags & BTS_KERNEL))
- control |= ds_cfg.ctl[dsf_bts_kernel];
- if (!(tracer->trace.ds.flags & BTS_USER))
- control |= ds_cfg.ctl[dsf_bts_user];
-
- return control;
-}
-
-void ds_resume_bts(struct bts_tracer *tracer)
-{
- struct task_struct *task;
- unsigned long debugctlmsr;
- int cpu;
-
- if (!tracer)
- return;
-
- tracer->flags = tracer->trace.ds.flags;
-
- task = tracer->ds.context->task;
- cpu = tracer->ds.context->cpu;
-
- WARN_ON(!task && irqs_disabled());
-
- debugctlmsr = (task ?
- task->thread.debugctlmsr :
- get_debugctlmsr_on_cpu(cpu));
- debugctlmsr |= ds_bts_control(tracer);
-
- if (task)
- update_task_debugctlmsr(task, debugctlmsr);
- else
- update_debugctlmsr_on_cpu(cpu, debugctlmsr);
-}
-
-int ds_resume_bts_noirq(struct bts_tracer *tracer)
-{
- struct task_struct *task;
- unsigned long debugctlmsr, irq;
- int cpu, error = 0;
-
- if (!tracer)
- return 0;
-
- tracer->flags = tracer->trace.ds.flags;
-
- task = tracer->ds.context->task;
- cpu = tracer->ds.context->cpu;
-
- local_irq_save(irq);
-
- error = -EPERM;
- if (!task && (cpu != smp_processor_id()))
- goto out;
-
- debugctlmsr = (task ?
- task->thread.debugctlmsr :
- get_debugctlmsr());
- debugctlmsr |= ds_bts_control(tracer);
-
- if (task)
- update_task_debugctlmsr(task, debugctlmsr);
- else
- update_debugctlmsr(debugctlmsr);
-
- error = 0;
- out:
- local_irq_restore(irq);
- return error;
-}
-
-static void ds_free_pebs(struct pebs_tracer *tracer)
-{
- struct task_struct *task;
-
- task = tracer->ds.context->task;
-
- WARN_ON_ONCE(tracer->ds.context->pebs_master != tracer);
- tracer->ds.context->pebs_master = NULL;
-
- ds_put_context(tracer->ds.context);
- put_tracer(task);
-
- kfree(tracer);
-}
-
-void ds_release_pebs(struct pebs_tracer *tracer)
-{
- might_sleep();
-
- if (!tracer)
- return;
-
- ds_suspend_pebs(tracer);
- ds_free_pebs(tracer);
-}
-
-int ds_release_pebs_noirq(struct pebs_tracer *tracer)
-{
- struct task_struct *task;
- unsigned long irq;
- int error;
-
- if (!tracer)
- return 0;
-
- task = tracer->ds.context->task;
-
- local_irq_save(irq);
-
- error = -EPERM;
- if (!task &&
- (tracer->ds.context->cpu != smp_processor_id()))
- goto out;
-
- error = -EPERM;
- if (task && (task != current))
- goto out;
-
- ds_suspend_pebs_noirq(tracer);
- ds_free_pebs(tracer);
-
- error = 0;
- out:
- local_irq_restore(irq);
- return error;
-}
-
-void ds_suspend_pebs(struct pebs_tracer *tracer)
-{
-
-}
-
-int ds_suspend_pebs_noirq(struct pebs_tracer *tracer)
-{
- return 0;
-}
-
-void ds_resume_pebs(struct pebs_tracer *tracer)
-{
-
-}
-
-int ds_resume_pebs_noirq(struct pebs_tracer *tracer)
-{
- return 0;
-}
-
-const struct bts_trace *ds_read_bts(struct bts_tracer *tracer)
-{
- if (!tracer)
- return NULL;
-
- ds_read_config(tracer->ds.context, &tracer->trace.ds, ds_bts);
- return &tracer->trace;
-}
-
-const struct pebs_trace *ds_read_pebs(struct pebs_tracer *tracer)
-{
- if (!tracer)
- return NULL;
-
- ds_read_config(tracer->ds.context, &tracer->trace.ds, ds_pebs);
-
- tracer->trace.counters = ds_cfg.nr_counter_reset;
- memcpy(tracer->trace.counter_reset,
- tracer->ds.context->ds +
- (NUM_DS_PTR_FIELDS * ds_cfg.sizeof_ptr_field),
- ds_cfg.nr_counter_reset * PEBS_RESET_FIELD_SIZE);
-
- return &tracer->trace;
-}
-
-int ds_reset_bts(struct bts_tracer *tracer)
-{
- if (!tracer)
- return -EINVAL;
-
- tracer->trace.ds.top = tracer->trace.ds.begin;
-
- ds_set(tracer->ds.context->ds, ds_bts, ds_index,
- (unsigned long)tracer->trace.ds.top);
-
- return 0;
-}
-
-int ds_reset_pebs(struct pebs_tracer *tracer)
-{
- if (!tracer)
- return -EINVAL;
-
- tracer->trace.ds.top = tracer->trace.ds.begin;
-
- ds_set(tracer->ds.context->ds, ds_pebs, ds_index,
- (unsigned long)tracer->trace.ds.top);
-
- return 0;
-}
-
-int ds_set_pebs_reset(struct pebs_tracer *tracer,
- unsigned int counter, u64 value)
-{
- if (!tracer)
- return -EINVAL;
-
- if (ds_cfg.nr_counter_reset < counter)
- return -EINVAL;
-
- *(u64 *)(tracer->ds.context->ds +
- (NUM_DS_PTR_FIELDS * ds_cfg.sizeof_ptr_field) +
- (counter * PEBS_RESET_FIELD_SIZE)) = value;
-
- return 0;
-}
-
-static const struct ds_configuration ds_cfg_netburst = {
- .name = "Netburst",
- .ctl[dsf_bts] = (1 << 2) | (1 << 3),
- .ctl[dsf_bts_kernel] = (1 << 5),
- .ctl[dsf_bts_user] = (1 << 6),
- .nr_counter_reset = 1,
-};
-static const struct ds_configuration ds_cfg_pentium_m = {
- .name = "Pentium M",
- .ctl[dsf_bts] = (1 << 6) | (1 << 7),
- .nr_counter_reset = 1,
-};
-static const struct ds_configuration ds_cfg_core2_atom = {
- .name = "Core 2/Atom",
- .ctl[dsf_bts] = (1 << 6) | (1 << 7),
- .ctl[dsf_bts_kernel] = (1 << 9),
- .ctl[dsf_bts_user] = (1 << 10),
- .nr_counter_reset = 1,
-};
-static const struct ds_configuration ds_cfg_core_i7 = {
- .name = "Core i7",
- .ctl[dsf_bts] = (1 << 6) | (1 << 7),
- .ctl[dsf_bts_kernel] = (1 << 9),
- .ctl[dsf_bts_user] = (1 << 10),
- .nr_counter_reset = 4,
-};
-
-static void
-ds_configure(const struct ds_configuration *cfg,
- struct cpuinfo_x86 *cpu)
-{
- unsigned long nr_pebs_fields = 0;
-
- printk(KERN_INFO "[ds] using %s configuration\n", cfg->name);
-
-#ifdef __i386__
- nr_pebs_fields = 10;
-#else
- nr_pebs_fields = 18;
-#endif
-
- /*
- * Starting with version 2, architectural performance
- * monitoring supports a format specifier.
- */
- if ((cpuid_eax(0xa) & 0xff) > 1) {
- unsigned long perf_capabilities, format;
-
- rdmsrl(MSR_IA32_PERF_CAPABILITIES, perf_capabilities);
-
- format = (perf_capabilities >> 8) & 0xf;
-
- switch (format) {
- case 0:
- nr_pebs_fields = 18;
- break;
- case 1:
- nr_pebs_fields = 22;
- break;
- default:
- printk(KERN_INFO
- "[ds] unknown PEBS format: %lu\n", format);
- nr_pebs_fields = 0;
- break;
- }
- }
-
- memset(&ds_cfg, 0, sizeof(ds_cfg));
- ds_cfg = *cfg;
-
- ds_cfg.sizeof_ptr_field =
- (cpu_has(cpu, X86_FEATURE_DTES64) ? 8 : 4);
-
- ds_cfg.sizeof_rec[ds_bts] = ds_cfg.sizeof_ptr_field * 3;
- ds_cfg.sizeof_rec[ds_pebs] = ds_cfg.sizeof_ptr_field * nr_pebs_fields;
-
- if (!cpu_has(cpu, X86_FEATURE_BTS)) {
- ds_cfg.sizeof_rec[ds_bts] = 0;
- printk(KERN_INFO "[ds] bts not available\n");
- }
- if (!cpu_has(cpu, X86_FEATURE_PEBS)) {
- ds_cfg.sizeof_rec[ds_pebs] = 0;
- printk(KERN_INFO "[ds] pebs not available\n");
- }
-
- printk(KERN_INFO "[ds] sizes: address: %u bit, ",
- 8 * ds_cfg.sizeof_ptr_field);
- printk("bts/pebs record: %u/%u bytes\n",
- ds_cfg.sizeof_rec[ds_bts], ds_cfg.sizeof_rec[ds_pebs]);
-
- WARN_ON_ONCE(MAX_PEBS_COUNTERS < ds_cfg.nr_counter_reset);
-}
-
-void __cpuinit ds_init_intel(struct cpuinfo_x86 *c)
-{
- /* Only configure the first cpu. Others are identical. */
- if (ds_cfg.name)
- return;
-
- switch (c->x86) {
- case 0x6:
- switch (c->x86_model) {
- case 0x9:
- case 0xd: /* Pentium M */
- ds_configure(&ds_cfg_pentium_m, c);
- break;
- case 0xf:
- case 0x17: /* Core2 */
- case 0x1c: /* Atom */
- ds_configure(&ds_cfg_core2_atom, c);
- break;
- case 0x1a: /* Core i7 */
- ds_configure(&ds_cfg_core_i7, c);
- break;
- default:
- /* Sorry, don't know about them. */
- break;
- }
- break;
- case 0xf:
- switch (c->x86_model) {
- case 0x0:
- case 0x1:
- case 0x2: /* Netburst */
- ds_configure(&ds_cfg_netburst, c);
- break;
- default:
- /* Sorry, don't know about them. */
- break;
- }
- break;
- default:
- /* Sorry, don't know about them. */
- break;
- }
-}
-
-static inline void ds_take_timestamp(struct ds_context *context,
- enum bts_qualifier qualifier,
- struct task_struct *task)
-{
- struct bts_tracer *tracer = context->bts_master;
- struct bts_struct ts;
-
- /* Prevent compilers from reading the tracer pointer twice. */
- barrier();
-
- if (!tracer || !(tracer->flags & BTS_TIMESTAMPS))
- return;
-
- memset(&ts, 0, sizeof(ts));
- ts.qualifier = qualifier;
- ts.variant.event.clock = trace_clock_global();
- ts.variant.event.pid = task->pid;
-
- bts_write(tracer, &ts);
-}
-
-/*
- * Change the DS configuration from tracing prev to tracing next.
- */
-void ds_switch_to(struct task_struct *prev, struct task_struct *next)
-{
- struct ds_context *prev_ctx = prev->thread.ds_ctx;
- struct ds_context *next_ctx = next->thread.ds_ctx;
- unsigned long debugctlmsr = next->thread.debugctlmsr;
-
- /* Make sure all data is read before we start. */
- barrier();
-
- if (prev_ctx) {
- update_debugctlmsr(0);
-
- ds_take_timestamp(prev_ctx, bts_task_departs, prev);
- }
-
- if (next_ctx) {
- ds_take_timestamp(next_ctx, bts_task_arrives, next);
-
- wrmsrl(MSR_IA32_DS_AREA, (unsigned long)next_ctx->ds);
- }
-
- update_debugctlmsr(debugctlmsr);
-}
-
-static __init int ds_selftest(void)
-{
- if (ds_cfg.sizeof_rec[ds_bts]) {
- int error;
-
- error = ds_selftest_bts();
- if (error) {
- WARN(1, "[ds] selftest failed. disabling bts.\n");
- ds_cfg.sizeof_rec[ds_bts] = 0;
- }
- }
-
- if (ds_cfg.sizeof_rec[ds_pebs]) {
- int error;
-
- error = ds_selftest_pebs();
- if (error) {
- WARN(1, "[ds] selftest failed. disabling pebs.\n");
- ds_cfg.sizeof_rec[ds_pebs] = 0;
- }
- }
-
- return 0;
-}
-device_initcall(ds_selftest);
diff --git a/arch/x86/kernel/ds_selftest.c b/arch/x86/kernel/ds_selftest.c
deleted file mode 100644
index 6bc7c19..0000000
--- a/arch/x86/kernel/ds_selftest.c
+++ /dev/null
@@ -1,408 +0,0 @@
-/*
- * Debug Store support - selftest
- *
- *
- * Copyright (C) 2009 Intel Corporation.
- * Markus Metzger <markus.t.metzger@intel.com>, 2009
- */
-
-#include "ds_selftest.h"
-
-#include <linux/kernel.h>
-#include <linux/string.h>
-#include <linux/smp.h>
-#include <linux/cpu.h>
-
-#include <asm/ds.h>
-
-
-#define BUFFER_SIZE 521 /* Intentionally chose an odd size. */
-#define SMALL_BUFFER_SIZE 24 /* A single bts entry. */
-
-struct ds_selftest_bts_conf {
- struct bts_tracer *tracer;
- int error;
- int (*suspend)(struct bts_tracer *);
- int (*resume)(struct bts_tracer *);
-};
-
-static int ds_selftest_bts_consistency(const struct bts_trace *trace)
-{
- int error = 0;
-
- if (!trace) {
- printk(KERN_CONT "failed to access trace...");
- /* Bail out. Other tests are pointless. */
- return -1;
- }
-
- if (!trace->read) {
- printk(KERN_CONT "bts read not available...");
- error = -1;
- }
-
- /* Do some sanity checks on the trace configuration. */
- if (!trace->ds.n) {
- printk(KERN_CONT "empty bts buffer...");
- error = -1;
- }
- if (!trace->ds.size) {
- printk(KERN_CONT "bad bts trace setup...");
- error = -1;
- }
- if (trace->ds.end !=
- (char *)trace->ds.begin + (trace->ds.n * trace->ds.size)) {
- printk(KERN_CONT "bad bts buffer setup...");
- error = -1;
- }
- /*
- * We allow top in [begin; end], since its not clear when the
- * overflow adjustment happens: after the increment or before the
- * write.
- */
- if ((trace->ds.top < trace->ds.begin) ||
- (trace->ds.end < trace->ds.top)) {
- printk(KERN_CONT "bts top out of bounds...");
- error = -1;
- }
-
- return error;
-}
-
-static int ds_selftest_bts_read(struct bts_tracer *tracer,
- const struct bts_trace *trace,
- const void *from, const void *to)
-{
- const unsigned char *at;
-
- /*
- * Check a few things which do not belong to this test.
- * They should be covered by other tests.
- */
- if (!trace)
- return -1;
-
- if (!trace->read)
- return -1;
-
- if (to < from)
- return -1;
-
- if (from < trace->ds.begin)
- return -1;
-
- if (trace->ds.end < to)
- return -1;
-
- if (!trace->ds.size)
- return -1;
-
- /* Now to the test itself. */
- for (at = from; (void *)at < to; at += trace->ds.size) {
- struct bts_struct bts;
- unsigned long index;
- int error;
-
- if (((void *)at - trace->ds.begin) % trace->ds.size) {
- printk(KERN_CONT
- "read from non-integer index...");
- return -1;
- }
- index = ((void *)at - trace->ds.begin) / trace->ds.size;
-
- memset(&bts, 0, sizeof(bts));
- error = trace->read(tracer, at, &bts);
- if (error < 0) {
- printk(KERN_CONT
- "error reading bts trace at [%lu] (0x%p)...",
- index, at);
- return error;
- }
-
- switch (bts.qualifier) {
- case BTS_BRANCH:
- break;
- default:
- printk(KERN_CONT
- "unexpected bts entry %llu at [%lu] (0x%p)...",
- bts.qualifier, index, at);
- return -1;
- }
- }
-
- return 0;
-}
-
-static void ds_selftest_bts_cpu(void *arg)
-{
- struct ds_selftest_bts_conf *conf = arg;
- const struct bts_trace *trace;
- void *top;
-
- if (IS_ERR(conf->tracer)) {
- conf->error = PTR_ERR(conf->tracer);
- conf->tracer = NULL;
-
- printk(KERN_CONT
- "initialization failed (err: %d)...", conf->error);
- return;
- }
-
- /* We should meanwhile have enough trace. */
- conf->error = conf->suspend(conf->tracer);
- if (conf->error < 0)
- return;
-
- /* Let's see if we can access the trace. */
- trace = ds_read_bts(conf->tracer);
-
- conf->error = ds_selftest_bts_consistency(trace);
- if (conf->error < 0)
- return;
-
- /* If everything went well, we should have a few trace entries. */
- if (trace->ds.top == trace->ds.begin) {
- /*
- * It is possible but highly unlikely that we got a
- * buffer overflow and end up at exactly the same
- * position we started from.
- * Let's issue a warning, but continue.
- */
- printk(KERN_CONT "no trace/overflow...");
- }
-
- /* Let's try to read the trace we collected. */
- conf->error =
- ds_selftest_bts_read(conf->tracer, trace,
- trace->ds.begin, trace->ds.top);
- if (conf->error < 0)
- return;
-
- /*
- * Let's read the trace again.
- * Since we suspended tracing, we should get the same result.
- */
- top = trace->ds.top;
-
- trace = ds_read_bts(conf->tracer);
- conf->error = ds_selftest_bts_consistency(trace);
- if (conf->error < 0)
- return;
-
- if (top != trace->ds.top) {
- printk(KERN_CONT "suspend not working...");
- conf->error = -1;
- return;
- }
-
- /* Let's collect some more trace - see if resume is working. */
- conf->error = conf->resume(conf->tracer);
- if (conf->error < 0)
- return;
-
- conf->error = conf->suspend(conf->tracer);
- if (conf->error < 0)
- return;
-
- trace = ds_read_bts(conf->tracer);
-
- conf->error = ds_selftest_bts_consistency(trace);
- if (conf->error < 0)
- return;
-
- if (trace->ds.top == top) {
- /*
- * It is possible but highly unlikely that we got a
- * buffer overflow and end up at exactly the same
- * position we started from.
- * Let's issue a warning and check the full trace.
- */
- printk(KERN_CONT
- "no resume progress/overflow...");
-
- conf->error =
- ds_selftest_bts_read(conf->tracer, trace,
- trace->ds.begin, trace->ds.end);
- } else if (trace->ds.top < top) {
- /*
- * We had a buffer overflow - the entire buffer should
- * contain trace records.
- */
- conf->error =
- ds_selftest_bts_read(conf->tracer, trace,
- trace->ds.begin, trace->ds.end);
- } else {
- /*
- * It is quite likely that the buffer did not overflow.
- * Let's just check the delta trace.
- */
- conf->error =
- ds_selftest_bts_read(conf->tracer, trace, top,
- trace->ds.top);
- }
- if (conf->error < 0)
- return;
-
- conf->error = 0;
-}
-
-static int ds_suspend_bts_wrap(struct bts_tracer *tracer)
-{
- ds_suspend_bts(tracer);
- return 0;
-}
-
-static int ds_resume_bts_wrap(struct bts_tracer *tracer)
-{
- ds_resume_bts(tracer);
- return 0;
-}
-
-static void ds_release_bts_noirq_wrap(void *tracer)
-{
- (void)ds_release_bts_noirq(tracer);
-}
-
-static int ds_selftest_bts_bad_release_noirq(int cpu,
- struct bts_tracer *tracer)
-{
- int error = -EPERM;
-
- /* Try to release the tracer on the wrong cpu. */
- get_cpu();
- if (cpu != smp_processor_id()) {
- error = ds_release_bts_noirq(tracer);
- if (error != -EPERM)
- printk(KERN_CONT "release on wrong cpu...");
- }
- put_cpu();
-
- return error ? 0 : -1;
-}
-
-static int ds_selftest_bts_bad_request_cpu(int cpu, void *buffer)
-{
- struct bts_tracer *tracer;
- int error;
-
- /* Try to request cpu tracing while task tracing is active. */
- tracer = ds_request_bts_cpu(cpu, buffer, BUFFER_SIZE, NULL,
- (size_t)-1, BTS_KERNEL);
- error = PTR_ERR(tracer);
- if (!IS_ERR(tracer)) {
- ds_release_bts(tracer);
- error = 0;
- }
-
- if (error != -EPERM)
- printk(KERN_CONT "cpu/task tracing overlap...");
-
- return error ? 0 : -1;
-}
-
-static int ds_selftest_bts_bad_request_task(void *buffer)
-{
- struct bts_tracer *tracer;
- int error;
-
- /* Try to request cpu tracing while task tracing is active. */
- tracer = ds_request_bts_task(current, buffer, BUFFER_SIZE, NULL,
- (size_t)-1, BTS_KERNEL);
- error = PTR_ERR(tracer);
- if (!IS_ERR(tracer)) {
- error = 0;
- ds_release_bts(tracer);
- }
-
- if (error != -EPERM)
- printk(KERN_CONT "task/cpu tracing overlap...");
-
- return error ? 0 : -1;
-}
-
-int ds_selftest_bts(void)
-{
- struct ds_selftest_bts_conf conf;
- unsigned char buffer[BUFFER_SIZE], *small_buffer;
- unsigned long irq;
- int cpu;
-
- printk(KERN_INFO "[ds] bts selftest...");
- conf.error = 0;
-
- small_buffer = (unsigned char *)ALIGN((unsigned long)buffer, 8) + 8;
-
- get_online_cpus();
- for_each_online_cpu(cpu) {
- conf.suspend = ds_suspend_bts_wrap;
- conf.resume = ds_resume_bts_wrap;
- conf.tracer =
- ds_request_bts_cpu(cpu, buffer, BUFFER_SIZE,
- NULL, (size_t)-1, BTS_KERNEL);
- ds_selftest_bts_cpu(&conf);
- if (conf.error >= 0)
- conf.error = ds_selftest_bts_bad_request_task(buffer);
- ds_release_bts(conf.tracer);
- if (conf.error < 0)
- goto out;
-
- conf.suspend = ds_suspend_bts_noirq;
- conf.resume = ds_resume_bts_noirq;
- conf.tracer =
- ds_request_bts_cpu(cpu, buffer, BUFFER_SIZE,
- NULL, (size_t)-1, BTS_KERNEL);
- smp_call_function_single(cpu, ds_selftest_bts_cpu, &conf, 1);
- if (conf.error >= 0) {
- conf.error =
- ds_selftest_bts_bad_release_noirq(cpu,
- conf.tracer);
- /* We must not release the tracer twice. */
- if (conf.error < 0)
- conf.tracer = NULL;
- }
- if (conf.error >= 0)
- conf.error = ds_selftest_bts_bad_request_task(buffer);
- smp_call_function_single(cpu, ds_release_bts_noirq_wrap,
- conf.tracer, 1);
- if (conf.error < 0)
- goto out;
- }
-
- conf.suspend = ds_suspend_bts_wrap;
- conf.resume = ds_resume_bts_wrap;
- conf.tracer =
- ds_request_bts_task(current, buffer, BUFFER_SIZE,
- NULL, (size_t)-1, BTS_KERNEL);
- ds_selftest_bts_cpu(&conf);
- if (conf.error >= 0)
- conf.error = ds_selftest_bts_bad_request_cpu(0, buffer);
- ds_release_bts(conf.tracer);
- if (conf.error < 0)
- goto out;
-
- conf.suspend = ds_suspend_bts_noirq;
- conf.resume = ds_resume_bts_noirq;
- conf.tracer =
- ds_request_bts_task(current, small_buffer, SMALL_BUFFER_SIZE,
- NULL, (size_t)-1, BTS_KERNEL);
- local_irq_save(irq);
- ds_selftest_bts_cpu(&conf);
- if (conf.error >= 0)
- conf.error = ds_selftest_bts_bad_request_cpu(0, buffer);
- ds_release_bts_noirq(conf.tracer);
- local_irq_restore(irq);
- if (conf.error < 0)
- goto out;
-
- conf.error = 0;
- out:
- put_online_cpus();
- printk(KERN_CONT "%s.\n", (conf.error ? "failed" : "passed"));
-
- return conf.error;
-}
-
-int ds_selftest_pebs(void)
-{
- return 0;
-}
diff --git a/arch/x86/kernel/ds_selftest.h b/arch/x86/kernel/ds_selftest.h
deleted file mode 100644
index 2ba8745..0000000
--- a/arch/x86/kernel/ds_selftest.h
+++ /dev/null
@@ -1,15 +0,0 @@
-/*
- * Debug Store support - selftest
- *
- *
- * Copyright (C) 2009 Intel Corporation.
- * Markus Metzger <markus.t.metzger@intel.com>, 2009
- */
-
-#ifdef CONFIG_X86_DS_SELFTEST
-extern int ds_selftest_bts(void);
-extern int ds_selftest_pebs(void);
-#else
-static inline int ds_selftest_bts(void) { return 0; }
-static inline int ds_selftest_pebs(void) { return 0; }
-#endif
diff --git a/arch/x86/kernel/dumpstack.c b/arch/x86/kernel/dumpstack.c
index 6d81755..c89a386 100644
--- a/arch/x86/kernel/dumpstack.c
+++ b/arch/x86/kernel/dumpstack.c
@@ -224,11 +224,6 @@ unsigned __kprobes long oops_begin(void)
int cpu;
unsigned long flags;
- /* notify the hw-branch tracer so it may disable tracing and
- add the last trace to the trace buffer -
- the earlier this happens, the more useful the trace. */
- trace_hw_branch_oops();
-
oops_enter();
/* racy, but better than risking deadlock. */
diff --git a/arch/x86/kernel/kprobes.c b/arch/x86/kernel/kprobes.c
index b43bbae..f2f56c0 100644
--- a/arch/x86/kernel/kprobes.c
+++ b/arch/x86/kernel/kprobes.c
@@ -422,14 +422,22 @@ static void __kprobes set_current_kprobe(struct kprobe *p, struct pt_regs *regs,
static void __kprobes clear_btf(void)
{
- if (test_thread_flag(TIF_DEBUGCTLMSR))
- update_debugctlmsr(0);
+ if (test_thread_flag(TIF_BLOCKSTEP)) {
+ unsigned long debugctl = get_debugctlmsr();
+
+ debugctl &= ~DEBUGCTLMSR_BTF;
+ update_debugctlmsr(debugctl);
+ }
}
static void __kprobes restore_btf(void)
{
- if (test_thread_flag(TIF_DEBUGCTLMSR))
- update_debugctlmsr(current->thread.debugctlmsr);
+ if (test_thread_flag(TIF_BLOCKSTEP)) {
+ unsigned long debugctl = get_debugctlmsr();
+
+ debugctl |= DEBUGCTLMSR_BTF;
+ update_debugctlmsr(debugctl);
+ }
}
void __kprobes arch_prepare_kretprobe(struct kretprobe_instance *ri,
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index 28ad9f4..eccdb57 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -20,7 +20,6 @@
#include <asm/idle.h>
#include <asm/uaccess.h>
#include <asm/i387.h>
-#include <asm/ds.h>
#include <asm/debugreg.h>
unsigned long idle_halt;
@@ -50,8 +49,6 @@ void free_thread_xstate(struct task_struct *tsk)
kmem_cache_free(task_xstate_cachep, tsk->thread.xstate);
tsk->thread.xstate = NULL;
}
-
- WARN(tsk->thread.ds_ctx, "leaking DS context\n");
}
void free_thread_info(struct thread_info *ti)
@@ -198,11 +195,16 @@ void __switch_to_xtra(struct task_struct *prev_p, struct task_struct *next_p,
prev = &prev_p->thread;
next = &next_p->thread;
- if (test_tsk_thread_flag(next_p, TIF_DS_AREA_MSR) ||
- test_tsk_thread_flag(prev_p, TIF_DS_AREA_MSR))
- ds_switch_to(prev_p, next_p);
- else if (next->debugctlmsr != prev->debugctlmsr)
- update_debugctlmsr(next->debugctlmsr);
+ if (test_tsk_thread_flag(prev_p, TIF_BLOCKSTEP) ^
+ test_tsk_thread_flag(next_p, TIF_BLOCKSTEP)) {
+ unsigned long debugctl = get_debugctlmsr();
+
+ debugctl &= ~DEBUGCTLMSR_BTF;
+ if (test_tsk_thread_flag(next_p, TIF_BLOCKSTEP))
+ debugctl |= DEBUGCTLMSR_BTF;
+
+ update_debugctlmsr(debugctl);
+ }
if (test_tsk_thread_flag(prev_p, TIF_NOTSC) ^
test_tsk_thread_flag(next_p, TIF_NOTSC)) {
diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c
index f6c6266..75090c5 100644
--- a/arch/x86/kernel/process_32.c
+++ b/arch/x86/kernel/process_32.c
@@ -55,7 +55,6 @@
#include <asm/cpu.h>
#include <asm/idle.h>
#include <asm/syscalls.h>
-#include <asm/ds.h>
#include <asm/debugreg.h>
asmlinkage void ret_from_fork(void) __asm__("ret_from_fork");
@@ -238,13 +237,6 @@ int copy_thread(unsigned long clone_flags, unsigned long sp,
kfree(p->thread.io_bitmap_ptr);
p->thread.io_bitmap_max = 0;
}
-
- clear_tsk_thread_flag(p, TIF_DS_AREA_MSR);
- p->thread.ds_ctx = NULL;
-
- clear_tsk_thread_flag(p, TIF_DEBUGCTLMSR);
- p->thread.debugctlmsr = 0;
-
return err;
}
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index dc9690b..cc4258f 100644
--- a/arch/x86/kernel/process_64.c
+++ b/arch/x86/kernel/process_64.c
@@ -49,7 +49,6 @@
#include <asm/ia32.h>
#include <asm/idle.h>
#include <asm/syscalls.h>
-#include <asm/ds.h>
#include <asm/debugreg.h>
asmlinkage extern void ret_from_fork(void);
@@ -313,13 +312,6 @@ int copy_thread(unsigned long clone_flags, unsigned long sp,
if (err)
goto out;
}
-
- clear_tsk_thread_flag(p, TIF_DS_AREA_MSR);
- p->thread.ds_ctx = NULL;
-
- clear_tsk_thread_flag(p, TIF_DEBUGCTLMSR);
- p->thread.debugctlmsr = 0;
-
err = 0;
out:
if (err && p->thread.io_bitmap_ptr) {
diff --git a/arch/x86/kernel/ptrace.c b/arch/x86/kernel/ptrace.c
index 2e9b550..055be0a 100644
--- a/arch/x86/kernel/ptrace.c
+++ b/arch/x86/kernel/ptrace.c
@@ -2,9 +2,6 @@
/*
* Pentium III FXSR, SSE support
* Gareth Hughes <gareth@valinux.com>, May 2000
- *
- * BTS tracing
- * Markus Metzger <markus.t.metzger@intel.com>, Dec 2007
*/
#include <linux/kernel.h>
@@ -22,7 +19,6 @@
#include <linux/audit.h>
#include <linux/seccomp.h>
#include <linux/signal.h>
-#include <linux/workqueue.h>
#include <linux/perf_event.h>
#include <linux/hw_breakpoint.h>
@@ -36,7 +32,6 @@
#include <asm/desc.h>
#include <asm/prctl.h>
#include <asm/proto.h>
-#include <asm/ds.h>
#include <asm/hw_breakpoint.h>
#include "tls.h"
@@ -789,342 +784,6 @@ static int ioperm_get(struct task_struct *target,
0, IO_BITMAP_BYTES);
}
-#ifdef CONFIG_X86_PTRACE_BTS
-/*
- * A branch trace store context.
- *
- * Contexts may only be installed by ptrace_bts_config() and only for
- * ptraced tasks.
- *
- * Contexts are destroyed when the tracee is detached from the tracer.
- * The actual destruction work requires interrupts enabled, so the
- * work is deferred and will be scheduled during __ptrace_unlink().
- *
- * Contexts hold an additional task_struct reference on the traced
- * task, as well as a reference on the tracer's mm.
- *
- * Ptrace already holds a task_struct for the duration of ptrace operations,
- * but since destruction is deferred, it may be executed after both
- * tracer and tracee exited.
- */
-struct bts_context {
- /* The branch trace handle. */
- struct bts_tracer *tracer;
-
- /* The buffer used to store the branch trace and its size. */
- void *buffer;
- unsigned int size;
-
- /* The mm that paid for the above buffer. */
- struct mm_struct *mm;
-
- /* The task this context belongs to. */
- struct task_struct *task;
-
- /* The signal to send on a bts buffer overflow. */
- unsigned int bts_ovfl_signal;
-
- /* The work struct to destroy a context. */
- struct work_struct work;
-};
-
-static int alloc_bts_buffer(struct bts_context *context, unsigned int size)
-{
- void *buffer = NULL;
- int err = -ENOMEM;
-
- err = account_locked_memory(current->mm, current->signal->rlim, size);
- if (err < 0)
- return err;
-
- buffer = kzalloc(size, GFP_KERNEL);
- if (!buffer)
- goto out_refund;
-
- context->buffer = buffer;
- context->size = size;
- context->mm = get_task_mm(current);
-
- return 0;
-
- out_refund:
- refund_locked_memory(current->mm, size);
- return err;
-}
-
-static inline void free_bts_buffer(struct bts_context *context)
-{
- if (!context->buffer)
- return;
-
- kfree(context->buffer);
- context->buffer = NULL;
-
- refund_locked_memory(context->mm, context->size);
- context->size = 0;
-
- mmput(context->mm);
- context->mm = NULL;
-}
-
-static void free_bts_context_work(struct work_struct *w)
-{
- struct bts_context *context;
-
- context = container_of(w, struct bts_context, work);
-
- ds_release_bts(context->tracer);
- put_task_struct(context->task);
- free_bts_buffer(context);
- kfree(context);
-}
-
-static inline void free_bts_context(struct bts_context *context)
-{
- INIT_WORK(&context->work, free_bts_context_work);
- schedule_work(&context->work);
-}
-
-static inline struct bts_context *alloc_bts_context(struct task_struct *task)
-{
- struct bts_context *context = kzalloc(sizeof(*context), GFP_KERNEL);
- if (context) {
- context->task = task;
- task->bts = context;
-
- get_task_struct(task);
- }
-
- return context;
-}
-
-static int ptrace_bts_read_record(struct task_struct *child, size_t index,
- struct bts_struct __user *out)
-{
- struct bts_context *context;
- const struct bts_trace *trace;
- struct bts_struct bts;
- const unsigned char *at;
- int error;
-
- context = child->bts;
- if (!context)
- return -ESRCH;
-
- trace = ds_read_bts(context->tracer);
- if (!trace)
- return -ESRCH;
-
- at = trace->ds.top - ((index + 1) * trace->ds.size);
- if ((void *)at < trace->ds.begin)
- at += (trace->ds.n * trace->ds.size);
-
- if (!trace->read)
- return -EOPNOTSUPP;
-
- error = trace->read(context->tracer, at, &bts);
- if (error < 0)
- return error;
-
- if (copy_to_user(out, &bts, sizeof(bts)))
- return -EFAULT;
-
- return sizeof(bts);
-}
-
-static int ptrace_bts_drain(struct task_struct *child,
- long size,
- struct bts_struct __user *out)
-{
- struct bts_context *context;
- const struct bts_trace *trace;
- const unsigned char *at;
- int error, drained = 0;
-
- context = child->bts;
- if (!context)
- return -ESRCH;
-
- trace = ds_read_bts(context->tracer);
- if (!trace)
- return -ESRCH;
-
- if (!trace->read)
- return -EOPNOTSUPP;
-
- if (size < (trace->ds.top - trace->ds.begin))
- return -EIO;
-
- for (at = trace->ds.begin; (void *)at < trace->ds.top;
- out++, drained++, at += trace->ds.size) {
- struct bts_struct bts;
-
- error = trace->read(context->tracer, at, &bts);
- if (error < 0)
- return error;
-
- if (copy_to_user(out, &bts, sizeof(bts)))
- return -EFAULT;
- }
-
- memset(trace->ds.begin, 0, trace->ds.n * trace->ds.size);
-
- error = ds_reset_bts(context->tracer);
- if (error < 0)
- return error;
-
- return drained;
-}
-
-static int ptrace_bts_config(struct task_struct *child,
- long cfg_size,
- const struct ptrace_bts_config __user *ucfg)
-{
- struct bts_context *context;
- struct ptrace_bts_config cfg;
- unsigned int flags = 0;
-
- if (cfg_size < sizeof(cfg))
- return -EIO;
-
- if (copy_from_user(&cfg, ucfg, sizeof(cfg)))
- return -EFAULT;
-
- context = child->bts;
- if (!context)
- context = alloc_bts_context(child);
- if (!context)
- return -ENOMEM;
-
- if (cfg.flags & PTRACE_BTS_O_SIGNAL) {
- if (!cfg.signal)
- return -EINVAL;
-
- return -EOPNOTSUPP;
- context->bts_ovfl_signal = cfg.signal;
- }
-
- ds_release_bts(context->tracer);
- context->tracer = NULL;
-
- if ((cfg.flags & PTRACE_BTS_O_ALLOC) && (cfg.size != context->size)) {
- int err;
-
- free_bts_buffer(context);
- if (!cfg.size)
- return 0;
-
- err = alloc_bts_buffer(context, cfg.size);
- if (err < 0)
- return err;
- }
-
- if (cfg.flags & PTRACE_BTS_O_TRACE)
- flags |= BTS_USER;
-
- if (cfg.flags & PTRACE_BTS_O_SCHED)
- flags |= BTS_TIMESTAMPS;
-
- context->tracer =
- ds_request_bts_task(child, context->buffer, context->size,
- NULL, (size_t)-1, flags);
- if (unlikely(IS_ERR(context->tracer))) {
- int error = PTR_ERR(context->tracer);
-
- free_bts_buffer(context);
- context->tracer = NULL;
- return error;
- }
-
- return sizeof(cfg);
-}
-
-static int ptrace_bts_status(struct task_struct *child,
- long cfg_size,
- struct ptrace_bts_config __user *ucfg)
-{
- struct bts_context *context;
- const struct bts_trace *trace;
- struct ptrace_bts_config cfg;
-
- context = child->bts;
- if (!context)
- return -ESRCH;
-
- if (cfg_size < sizeof(cfg))
- return -EIO;
-
- trace = ds_read_bts(context->tracer);
- if (!trace)
- return -ESRCH;
-
- memset(&cfg, 0, sizeof(cfg));
- cfg.size = trace->ds.end - trace->ds.begin;
- cfg.signal = context->bts_ovfl_signal;
- cfg.bts_size = sizeof(struct bts_struct);
-
- if (cfg.signal)
- cfg.flags |= PTRACE_BTS_O_SIGNAL;
-
- if (trace->ds.flags & BTS_USER)
- cfg.flags |= PTRACE_BTS_O_TRACE;
-
- if (trace->ds.flags & BTS_TIMESTAMPS)
- cfg.flags |= PTRACE_BTS_O_SCHED;
-
- if (copy_to_user(ucfg, &cfg, sizeof(cfg)))
- return -EFAULT;
-
- return sizeof(cfg);
-}
-
-static int ptrace_bts_clear(struct task_struct *child)
-{
- struct bts_context *context;
- const struct bts_trace *trace;
-
- context = child->bts;
- if (!context)
- return -ESRCH;
-
- trace = ds_read_bts(context->tracer);
- if (!trace)
- return -ESRCH;
-
- memset(trace->ds.begin, 0, trace->ds.n * trace->ds.size);
-
- return ds_reset_bts(context->tracer);
-}
-
-static int ptrace_bts_size(struct task_struct *child)
-{
- struct bts_context *context;
- const struct bts_trace *trace;
-
- context = child->bts;
- if (!context)
- return -ESRCH;
-
- trace = ds_read_bts(context->tracer);
- if (!trace)
- return -ESRCH;
-
- return (trace->ds.top - trace->ds.begin) / trace->ds.size;
-}
-
-/*
- * Called from __ptrace_unlink() after the child has been moved back
- * to its original parent.
- */
-void ptrace_bts_untrace(struct task_struct *child)
-{
- if (unlikely(child->bts)) {
- free_bts_context(child->bts);
- child->bts = NULL;
- }
-}
-#endif /* CONFIG_X86_PTRACE_BTS */
-
/*
* Called by kernel/ptrace.c when detaching..
*
@@ -1252,39 +911,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
break;
#endif
- /*
- * These bits need more cooking - not enabled yet:
- */
-#ifdef CONFIG_X86_PTRACE_BTS
- case PTRACE_BTS_CONFIG:
- ret = ptrace_bts_config
- (child, data, (struct ptrace_bts_config __user *)addr);
- break;
-
- case PTRACE_BTS_STATUS:
- ret = ptrace_bts_status
- (child, data, (struct ptrace_bts_config __user *)addr);
- break;
-
- case PTRACE_BTS_SIZE:
- ret = ptrace_bts_size(child);
- break;
-
- case PTRACE_BTS_GET:
- ret = ptrace_bts_read_record
- (child, data, (struct bts_struct __user *) addr);
- break;
-
- case PTRACE_BTS_CLEAR:
- ret = ptrace_bts_clear(child);
- break;
-
- case PTRACE_BTS_DRAIN:
- ret = ptrace_bts_drain
- (child, data, (struct bts_struct __user *) addr);
- break;
-#endif /* CONFIG_X86_PTRACE_BTS */
-
default:
ret = ptrace_request(child, request, addr, data);
break;
@@ -1544,14 +1170,6 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
case PTRACE_GET_THREAD_AREA:
case PTRACE_SET_THREAD_AREA:
-#ifdef CONFIG_X86_PTRACE_BTS
- case PTRACE_BTS_CONFIG:
- case PTRACE_BTS_STATUS:
- case PTRACE_BTS_SIZE:
- case PTRACE_BTS_GET:
- case PTRACE_BTS_CLEAR:
- case PTRACE_BTS_DRAIN:
-#endif /* CONFIG_X86_PTRACE_BTS */
return arch_ptrace(child, request, addr, data);
default:
diff --git a/arch/x86/kernel/step.c b/arch/x86/kernel/step.c
index 3149032..58de45e 100644
--- a/arch/x86/kernel/step.c
+++ b/arch/x86/kernel/step.c
@@ -158,22 +158,6 @@ static int enable_single_step(struct task_struct *child)
}
/*
- * Install this value in MSR_IA32_DEBUGCTLMSR whenever child is running.
- */
-static void write_debugctlmsr(struct task_struct *child, unsigned long val)
-{
- if (child->thread.debugctlmsr == val)
- return;
-
- child->thread.debugctlmsr = val;
-
- if (child != current)
- return;
-
- update_debugctlmsr(val);
-}
-
-/*
* Enable single or block step.
*/
static void enable_step(struct task_struct *child, bool block)
@@ -186,15 +170,17 @@ static void enable_step(struct task_struct *child, bool block)
* that uses user-mode single stepping itself.
*/
if (enable_single_step(child) && block) {
- set_tsk_thread_flag(child, TIF_DEBUGCTLMSR);
- write_debugctlmsr(child,
- child->thread.debugctlmsr | DEBUGCTLMSR_BTF);
- } else {
- write_debugctlmsr(child,
- child->thread.debugctlmsr & ~DEBUGCTLMSR_BTF);
-
- if (!child->thread.debugctlmsr)
- clear_tsk_thread_flag(child, TIF_DEBUGCTLMSR);
+ unsigned long debugctl = get_debugctlmsr();
+
+ debugctl |= DEBUGCTLMSR_BTF;
+ update_debugctlmsr(debugctl);
+ set_tsk_thread_flag(child, TIF_BLOCKSTEP);
+ } else if (test_tsk_thread_flag(child, TIF_BLOCKSTEP)) {
+ unsigned long debugctl = get_debugctlmsr();
+
+ debugctl &= ~DEBUGCTLMSR_BTF;
+ update_debugctlmsr(debugctl);
+ clear_tsk_thread_flag(child, TIF_BLOCKSTEP);
}
}
@@ -213,11 +199,13 @@ void user_disable_single_step(struct task_struct *child)
/*
* Make sure block stepping (BTF) is disabled.
*/
- write_debugctlmsr(child,
- child->thread.debugctlmsr & ~DEBUGCTLMSR_BTF);
+ if (test_tsk_thread_flag(child, TIF_BLOCKSTEP)) {
+ unsigned long debugctl = get_debugctlmsr();
- if (!child->thread.debugctlmsr)
- clear_tsk_thread_flag(child, TIF_DEBUGCTLMSR);
+ debugctl &= ~DEBUGCTLMSR_BTF;
+ update_debugctlmsr(debugctl);
+ clear_tsk_thread_flag(child, TIF_BLOCKSTEP);
+ }
/* Always clear TIF_SINGLESTEP... */
clear_tsk_thread_flag(child, TIF_SINGLESTEP);
diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c
index 1168e44..36f1bd9 100644
--- a/arch/x86/kernel/traps.c
+++ b/arch/x86/kernel/traps.c
@@ -543,11 +543,11 @@ dotraplinkage void __kprobes do_debug(struct pt_regs *regs, long error_code)
/* DR6 may or may not be cleared by the CPU */
set_debugreg(0, 6);
+
/*
* The processor cleared BTF, so don't mark that we need it set.
*/
- clear_tsk_thread_flag(tsk, TIF_DEBUGCTLMSR);
- tsk->thread.debugctlmsr = 0;
+ clear_tsk_thread_flag(tsk, TIF_BLOCKSTEP);
/* Store the virtualized DR6 value */
tsk->thread.debugreg6 = dr6;
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 6e5e75e..0b896ac 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -3652,8 +3652,11 @@ static void vmx_complete_interrupts(struct vcpu_vmx *vmx)
/* We need to handle NMIs before interrupts are enabled */
if ((exit_intr_info & INTR_INFO_INTR_TYPE_MASK) == INTR_TYPE_NMI_INTR &&
- (exit_intr_info & INTR_INFO_VALID_MASK))
+ (exit_intr_info & INTR_INFO_VALID_MASK)) {
+ kvm_before_handle_nmi(&vmx->vcpu);
asm("int $2");
+ kvm_after_handle_nmi(&vmx->vcpu);
+ }
idtv_info_valid = idt_vectoring_info & VECTORING_INFO_VALID_MASK;
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 30efeea..58a96e6 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -40,6 +40,7 @@
#include <linux/user-return-notifier.h>
#include <linux/srcu.h>
#include <linux/slab.h>
+#include <linux/perf_event.h>
#include <trace/events/kvm.h>
#define CREATE_TRACE_POINTS
@@ -3955,6 +3956,47 @@ static void kvm_timer_init(void)
}
}
+static DEFINE_PER_CPU(struct kvm_vcpu *, current_vcpu);
+
+static int kvm_is_in_guest(void)
+{
+ return percpu_read(current_vcpu) != NULL;
+}
+
+static int kvm_is_user_mode(void)
+{
+ int user_mode = 3;
+ if (percpu_read(current_vcpu))
+ user_mode = kvm_x86_ops->get_cpl(percpu_read(current_vcpu));
+ return user_mode != 0;
+}
+
+static unsigned long kvm_get_guest_ip(void)
+{
+ unsigned long ip = 0;
+ if (percpu_read(current_vcpu))
+ ip = kvm_rip_read(percpu_read(current_vcpu));
+ return ip;
+}
+
+static struct perf_guest_info_callbacks kvm_guest_cbs = {
+ .is_in_guest = kvm_is_in_guest,
+ .is_user_mode = kvm_is_user_mode,
+ .get_guest_ip = kvm_get_guest_ip,
+};
+
+void kvm_before_handle_nmi(struct kvm_vcpu *vcpu)
+{
+ percpu_write(current_vcpu, vcpu);
+}
+EXPORT_SYMBOL_GPL(kvm_before_handle_nmi);
+
+void kvm_after_handle_nmi(struct kvm_vcpu *vcpu)
+{
+ percpu_write(current_vcpu, NULL);
+}
+EXPORT_SYMBOL_GPL(kvm_after_handle_nmi);
+
int kvm_arch_init(void *opaque)
{
int r;
@@ -3991,6 +4033,8 @@ int kvm_arch_init(void *opaque)
kvm_timer_init();
+ perf_register_guest_info_callbacks(&kvm_guest_cbs);
+
return 0;
out:
@@ -3999,6 +4043,8 @@ out:
void kvm_arch_exit(void)
{
+ perf_unregister_guest_info_callbacks(&kvm_guest_cbs);
+
if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC))
cpufreq_unregister_notifier(&kvmclock_cpufreq_notifier_block,
CPUFREQ_TRANSITION_NOTIFIER);
diff --git a/arch/x86/kvm/x86.h b/arch/x86/kvm/x86.h
index 2d101639..b7a4047 100644
--- a/arch/x86/kvm/x86.h
+++ b/arch/x86/kvm/x86.h
@@ -65,4 +65,7 @@ static inline int is_paging(struct kvm_vcpu *vcpu)
return kvm_read_cr0_bits(vcpu, X86_CR0_PG);
}
+void kvm_before_handle_nmi(struct kvm_vcpu *vcpu);
+void kvm_after_handle_nmi(struct kvm_vcpu *vcpu);
+
#endif
diff --git a/arch/x86/lib/Makefile b/arch/x86/lib/Makefile
index 419386c..cbaf8f2 100644
--- a/arch/x86/lib/Makefile
+++ b/arch/x86/lib/Makefile
@@ -20,7 +20,7 @@ lib-y := delay.o
lib-y += thunk_$(BITS).o
lib-y += usercopy_$(BITS).o getuser.o putuser.o
lib-y += memcpy_$(BITS).o
-lib-$(CONFIG_KPROBES) += insn.o inat.o
+lib-$(CONFIG_INSTRUCTION_DECODER) += insn.o inat.o
obj-y += msr.o msr-reg.o msr-reg-export.o
diff --git a/arch/x86/oprofile/op_model_ppro.c b/arch/x86/oprofile/op_model_ppro.c
index 2bf90fa..c8abc4d 100644
--- a/arch/x86/oprofile/op_model_ppro.c
+++ b/arch/x86/oprofile/op_model_ppro.c
@@ -239,11 +239,11 @@ static void arch_perfmon_setup_counters(void)
if (eax.split.version_id == 0 && current_cpu_data.x86 == 6 &&
current_cpu_data.x86_model == 15) {
eax.split.version_id = 2;
- eax.split.num_events = 2;
+ eax.split.num_counters = 2;
eax.split.bit_width = 40;
}
- num_counters = eax.split.num_events;
+ num_counters = eax.split.num_counters;
op_arch_perfmon_spec.num_counters = num_counters;
op_arch_perfmon_spec.num_controls = num_counters;
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