diff options
| -rw-r--r-- | Documentation/kernel-parameters.txt | 6 | ||||
| -rw-r--r-- | arch/x86/kernel/cpu/common_64.c | 51 | ||||
| -rw-r--r-- | arch/x86/kernel/entry_64.S | 4 | ||||
| -rw-r--r-- | arch/x86/kernel/paravirt.c | 1 | ||||
| -rw-r--r-- | arch/x86/kernel/setup_percpu.c | 9 | ||||
| -rw-r--r-- | arch/x86/kernel/traps_64.c | 5 | ||||
| -rw-r--r-- | include/asm-x86/msr.h | 23 | ||||
| -rw-r--r-- | include/asm-x86/paravirt.h | 12 |
8 files changed, 105 insertions, 6 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 1150444..82a079d 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -1882,6 +1882,12 @@ and is between 256 and 4096 characters. It is defined in the file shapers= [NET] Maximal number of shapers. + show_msr= [x86] show boot-time MSR settings + Format: { <integer> } + Show boot-time (BIOS-initialized) MSR settings. + The parameter means the number of CPUs to show, + for example 1 means boot CPU only. + sim710= [SCSI,HW] See header of drivers/scsi/sim710.c. diff --git a/arch/x86/kernel/cpu/common_64.c b/arch/x86/kernel/cpu/common_64.c index c3afba5..699ecbf 100644 --- a/arch/x86/kernel/cpu/common_64.c +++ b/arch/x86/kernel/cpu/common_64.c @@ -430,6 +430,49 @@ static __init int setup_noclflush(char *arg) } __setup("noclflush", setup_noclflush); +struct msr_range { + unsigned min; + unsigned max; +}; + +static struct msr_range msr_range_array[] __cpuinitdata = { + { 0x00000000, 0x00000418}, + { 0xc0000000, 0xc000040b}, + { 0xc0010000, 0xc0010142}, + { 0xc0011000, 0xc001103b}, +}; + +static void __cpuinit print_cpu_msr(void) +{ + unsigned index; + u64 val; + int i; + unsigned index_min, index_max; + + for (i = 0; i < ARRAY_SIZE(msr_range_array); i++) { + index_min = msr_range_array[i].min; + index_max = msr_range_array[i].max; + for (index = index_min; index < index_max; index++) { + if (rdmsrl_amd_safe(index, &val)) + continue; + printk(KERN_INFO " MSR%08x: %016llx\n", index, val); + } + } +} + +static int show_msr __cpuinitdata; +static __init int setup_show_msr(char *arg) +{ + int num; + + get_option(&arg, &num); + + if (num > 0) + show_msr = num; + return 1; +} +__setup("show_msr=", setup_show_msr); + void __cpuinit print_cpu_info(struct cpuinfo_x86 *c) { if (c->x86_model_id[0]) @@ -439,6 +482,14 @@ void __cpuinit print_cpu_info(struct cpuinfo_x86 *c) printk(KERN_CONT " stepping %02x\n", c->x86_mask); else printk(KERN_CONT "\n"); + +#ifdef CONFIG_SMP + if (c->cpu_index < show_msr) + print_cpu_msr(); +#else + if (show_msr) + print_cpu_msr(); +#endif } static __init int setup_disablecpuid(char *arg) diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S index 89434d4..cf3a0b2 100644 --- a/arch/x86/kernel/entry_64.S +++ b/arch/x86/kernel/entry_64.S @@ -275,9 +275,9 @@ ENTRY(native_usergs_sysret64) ENTRY(ret_from_fork) CFI_DEFAULT_STACK push kernel_eflags(%rip) - CFI_ADJUST_CFA_OFFSET 4 + CFI_ADJUST_CFA_OFFSET 8 popf # reset kernel eflags - CFI_ADJUST_CFA_OFFSET -4 + CFI_ADJUST_CFA_OFFSET -8 call schedule_tail GET_THREAD_INFO(%rcx) testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT),TI_flags(%rcx) diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c index 300da17..e2f4376 100644 --- a/arch/x86/kernel/paravirt.c +++ b/arch/x86/kernel/paravirt.c @@ -330,6 +330,7 @@ struct pv_cpu_ops pv_cpu_ops = { #endif .wbinvd = native_wbinvd, .read_msr = native_read_msr_safe, + .read_msr_amd = native_read_msr_amd_safe, .write_msr = native_write_msr_safe, .read_tsc = native_read_tsc, .read_pmc = native_read_pmc, diff --git a/arch/x86/kernel/setup_percpu.c b/arch/x86/kernel/setup_percpu.c index 76e305e..0e67f72 100644 --- a/arch/x86/kernel/setup_percpu.c +++ b/arch/x86/kernel/setup_percpu.c @@ -162,9 +162,16 @@ void __init setup_per_cpu_areas(void) printk(KERN_INFO "cpu %d has no node %d or node-local memory\n", cpu, node); + if (ptr) + printk(KERN_DEBUG "per cpu data for cpu%d at %016lx\n", + cpu, __pa(ptr)); } - else + else { ptr = alloc_bootmem_pages_node(NODE_DATA(node), size); + if (ptr) + printk(KERN_DEBUG "per cpu data for cpu%d on node%d at %016lx\n", + cpu, node, __pa(ptr)); + } #endif per_cpu_offset(cpu) = ptr - __per_cpu_start; memcpy(ptr, __per_cpu_start, __per_cpu_end - __per_cpu_start); diff --git a/arch/x86/kernel/traps_64.c b/arch/x86/kernel/traps_64.c index 513caac..7ffc8cf 100644 --- a/arch/x86/kernel/traps_64.c +++ b/arch/x86/kernel/traps_64.c @@ -339,9 +339,8 @@ static void show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs, unsigned long *stack, unsigned long bp, char *log_lvl) { - printk("\nCall Trace:\n"); + printk("Call Trace:\n"); dump_trace(task, regs, stack, bp, &print_trace_ops, log_lvl); - printk("\n"); } void show_trace(struct task_struct *task, struct pt_regs *regs, @@ -386,6 +385,7 @@ show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs, printk(" %016lx", *stack++); touch_nmi_watchdog(); } + printk("\n"); show_trace_log_lvl(task, regs, sp, bp, log_lvl); } @@ -443,7 +443,6 @@ void show_registers(struct pt_regs *regs) printk("Stack: "); show_stack_log_lvl(NULL, regs, (unsigned long *)sp, regs->bp, ""); - printk("\n"); printk(KERN_EMERG "Code: "); diff --git a/include/asm-x86/msr.h b/include/asm-x86/msr.h index 2362cfd..771bcb2 100644 --- a/include/asm-x86/msr.h +++ b/include/asm-x86/msr.h @@ -63,6 +63,22 @@ static inline unsigned long long native_read_msr_safe(unsigned int msr, return EAX_EDX_VAL(val, low, high); } +static inline unsigned long long native_read_msr_amd_safe(unsigned int msr, + int *err) +{ + DECLARE_ARGS(val, low, high); + + asm volatile("2: rdmsr ; xor %0,%0\n" + "1:\n\t" + ".section .fixup,\"ax\"\n\t" + "3: mov %3,%0 ; jmp 1b\n\t" + ".previous\n\t" + _ASM_EXTABLE(2b, 3b) + : "=r" (*err), EAX_EDX_RET(val, low, high) + : "c" (msr), "D" (0x9c5a203a), "i" (-EFAULT)); + return EAX_EDX_VAL(val, low, high); +} + static inline void native_write_msr(unsigned int msr, unsigned low, unsigned high) { @@ -158,6 +174,13 @@ static inline int rdmsrl_safe(unsigned msr, unsigned long long *p) *p = native_read_msr_safe(msr, &err); return err; } +static inline int rdmsrl_amd_safe(unsigned msr, unsigned long long *p) +{ + int err; + + *p = native_read_msr_amd_safe(msr, &err); + return err; +} #define rdtscl(low) \ ((low) = (u32)native_read_tsc()) diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h index fbbde93..d5cfc5e 100644 --- a/include/asm-x86/paravirt.h +++ b/include/asm-x86/paravirt.h @@ -137,6 +137,7 @@ struct pv_cpu_ops { /* MSR, PMC and TSR operations. err = 0/-EFAULT. wrmsr returns 0/-EFAULT. */ + u64 (*read_msr_amd)(unsigned int msr, int *err); u64 (*read_msr)(unsigned int msr, int *err); int (*write_msr)(unsigned int msr, unsigned low, unsigned high); @@ -726,6 +727,10 @@ static inline u64 paravirt_read_msr(unsigned msr, int *err) { return PVOP_CALL2(u64, pv_cpu_ops.read_msr, msr, err); } +static inline u64 paravirt_read_msr_amd(unsigned msr, int *err) +{ + return PVOP_CALL2(u64, pv_cpu_ops.read_msr_amd, msr, err); +} static inline int paravirt_write_msr(unsigned msr, unsigned low, unsigned high) { return PVOP_CALL3(int, pv_cpu_ops.write_msr, msr, low, high); @@ -771,6 +776,13 @@ static inline int rdmsrl_safe(unsigned msr, unsigned long long *p) *p = paravirt_read_msr(msr, &err); return err; } +static inline int rdmsrl_amd_safe(unsigned msr, unsigned long long *p) +{ + int err; + + *p = paravirt_read_msr_amd(msr, &err); + return err; +} static inline u64 paravirt_read_tsc(void) { |
