summaryrefslogtreecommitdiffstats
path: root/include/asm-x86
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2008-06-24 18:09:06 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-06-24 18:09:06 -0700
commit919c0d14ae93073a3957c018a6d86ceb1e2e454b (patch)
treeb654cfcee21adaf4842447e4fe21f74aa956bcca /include/asm-x86
parentde08341a0ef747d607542af3ae441b286f503e35 (diff)
parent6b1ed9086592fd4b066daae222751bb6757ca5eb (diff)
downloadop-kernel-dev-919c0d14ae93073a3957c018a6d86ceb1e2e454b.zip
op-kernel-dev-919c0d14ae93073a3957c018a6d86ceb1e2e454b.tar.gz
Merge branch 'kvm-updates-2.6.26' of git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm
* 'kvm-updates-2.6.26' of git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm: KVM: Remove now unused structs from kvm_para.h x86: KVM guest: Use the paravirt clocksource structs and functions KVM: Make kvm host use the paravirt clocksource structs x86: Make xen use the paravirt clocksource structs and functions x86: Add structs and functions for paravirt clocksource KVM: VMX: Fix host msr corruption with preemption enabled KVM: ioapic: fix lost interrupt when changing a device's irq KVM: MMU: Fix oops on guest userspace access to guest pagetable KVM: MMU: large page update_pte issue with non-PAE 32-bit guests (resend) KVM: MMU: Fix rmap_write_protect() hugepage iteration bug KVM: close timer injection race window in __vcpu_run KVM: Fix race between timer migration and vcpu migration
Diffstat (limited to 'include/asm-x86')
-rw-r--r--include/asm-x86/kvm_host.h4
-rw-r--r--include/asm-x86/kvm_para.h18
-rw-r--r--include/asm-x86/pvclock-abi.h42
-rw-r--r--include/asm-x86/pvclock.h13
4 files changed, 58 insertions, 19 deletions
diff --git a/include/asm-x86/kvm_host.h b/include/asm-x86/kvm_host.h
index 1d8cd01..844f2a8 100644
--- a/include/asm-x86/kvm_host.h
+++ b/include/asm-x86/kvm_host.h
@@ -18,6 +18,7 @@
#include <linux/kvm_para.h>
#include <linux/kvm_types.h>
+#include <asm/pvclock-abi.h>
#include <asm/desc.h>
#define KVM_MAX_VCPUS 16
@@ -282,7 +283,8 @@ struct kvm_vcpu_arch {
struct x86_emulate_ctxt emulate_ctxt;
gpa_t time;
- struct kvm_vcpu_time_info hv_clock;
+ struct pvclock_vcpu_time_info hv_clock;
+ unsigned int hv_clock_tsc_khz;
unsigned int time_offset;
struct page *time_page;
};
diff --git a/include/asm-x86/kvm_para.h b/include/asm-x86/kvm_para.h
index 5098459..bfd9900 100644
--- a/include/asm-x86/kvm_para.h
+++ b/include/asm-x86/kvm_para.h
@@ -48,24 +48,6 @@ struct kvm_mmu_op_release_pt {
#ifdef __KERNEL__
#include <asm/processor.h>
-/* xen binary-compatible interface. See xen headers for details */
-struct kvm_vcpu_time_info {
- uint32_t version;
- uint32_t pad0;
- uint64_t tsc_timestamp;
- uint64_t system_time;
- uint32_t tsc_to_system_mul;
- int8_t tsc_shift;
- int8_t pad[3];
-} __attribute__((__packed__)); /* 32 bytes */
-
-struct kvm_wall_clock {
- uint32_t wc_version;
- uint32_t wc_sec;
- uint32_t wc_nsec;
-} __attribute__((__packed__));
-
-
extern void kvmclock_init(void);
diff --git a/include/asm-x86/pvclock-abi.h b/include/asm-x86/pvclock-abi.h
new file mode 100644
index 0000000..6857f84
--- /dev/null
+++ b/include/asm-x86/pvclock-abi.h
@@ -0,0 +1,42 @@
+#ifndef _ASM_X86_PVCLOCK_ABI_H_
+#define _ASM_X86_PVCLOCK_ABI_H_
+#ifndef __ASSEMBLY__
+
+/*
+ * These structs MUST NOT be changed.
+ * They are the ABI between hypervisor and guest OS.
+ * Both Xen and KVM are using this.
+ *
+ * pvclock_vcpu_time_info holds the system time and the tsc timestamp
+ * of the last update. So the guest can use the tsc delta to get a
+ * more precise system time. There is one per virtual cpu.
+ *
+ * pvclock_wall_clock references the point in time when the system
+ * time was zero (usually boot time), thus the guest calculates the
+ * current wall clock by adding the system time.
+ *
+ * Protocol for the "version" fields is: hypervisor raises it (making
+ * it uneven) before it starts updating the fields and raises it again
+ * (making it even) when it is done. Thus the guest can make sure the
+ * time values it got are consistent by checking the version before
+ * and after reading them.
+ */
+
+struct pvclock_vcpu_time_info {
+ u32 version;
+ u32 pad0;
+ u64 tsc_timestamp;
+ u64 system_time;
+ u32 tsc_to_system_mul;
+ s8 tsc_shift;
+ u8 pad[3];
+} __attribute__((__packed__)); /* 32 bytes */
+
+struct pvclock_wall_clock {
+ u32 version;
+ u32 sec;
+ u32 nsec;
+} __attribute__((__packed__));
+
+#endif /* __ASSEMBLY__ */
+#endif /* _ASM_X86_PVCLOCK_ABI_H_ */
diff --git a/include/asm-x86/pvclock.h b/include/asm-x86/pvclock.h
new file mode 100644
index 0000000..85b1bba
--- /dev/null
+++ b/include/asm-x86/pvclock.h
@@ -0,0 +1,13 @@
+#ifndef _ASM_X86_PVCLOCK_H_
+#define _ASM_X86_PVCLOCK_H_
+
+#include <linux/clocksource.h>
+#include <asm/pvclock-abi.h>
+
+/* some helper functions for xen and kvm pv clock sources */
+cycle_t pvclock_clocksource_read(struct pvclock_vcpu_time_info *src);
+void pvclock_read_wallclock(struct pvclock_wall_clock *wall,
+ struct pvclock_vcpu_time_info *vcpu,
+ struct timespec *ts);
+
+#endif /* _ASM_X86_PVCLOCK_H_ */
OpenPOWER on IntegriCloud