On 08/26/2010 12:43 AM, Glauber Costa wrote:
This guest/host common patch prepares infrastructure for
the steal time implementation. Some constants are added,
and a name change happens in pvclock vcpu structure.
Signed-off-by: Glauber Costa<glommer@xxxxxxxxxx>
---
arch/x86/include/asm/kvm_para.h | 1 +
arch/x86/include/asm/pvclock-abi.h | 4 +++-
2 files changed, 4 insertions(+), 1 deletions(-)
diff --git a/arch/x86/include/asm/kvm_para.h b/arch/x86/include/asm/kvm_para.h
index 05eba5e..1759c81 100644
--- a/arch/x86/include/asm/kvm_para.h
+++ b/arch/x86/include/asm/kvm_para.h
@@ -25,6 +25,7 @@
* in pvclock structure. If no bits are set, all flags are ignored.
*/
#define KVM_FEATURE_CLOCKSOURCE_STABLE_BIT 24
+#define KVM_FEATURE_CLOCKSOURCE_STEAL_BIT 25
#define MSR_KVM_WALL_CLOCK 0x11
#define MSR_KVM_SYSTEM_TIME 0x12
diff --git a/arch/x86/include/asm/pvclock-abi.h b/arch/x86/include/asm/pvclock-abi.h
index 35f2d19..417061b 100644
--- a/arch/x86/include/asm/pvclock-abi.h
+++ b/arch/x86/include/asm/pvclock-abi.h
@@ -24,7 +24,7 @@
struct pvclock_vcpu_time_info {
u32 version;
- u32 pad0;
+ u32 steal_time;
u64 tsc_timestamp;
u64 system_time;
u32 tsc_to_system_mul;
@@ -40,5 +40,7 @@ struct pvclock_wall_clock {
} __attribute__((__packed__));
#define PVCLOCK_TSC_STABLE_BIT (1<< 0)
+#define PVCLOCK_STEAL_BIT (2<< 0)
+
#endif /* __ASSEMBLY__ */
#endif /* _ASM_X86_PVCLOCK_ABI_H */
We could extend pvclock to 64 bytes (unfortunately we didn't reserve
bits 0-5 like we did with others) and use an nsec field.
We can declare bit 1 to be a 'the address is 64 byte aligned and bits
2-5 are now feature bits', or we can add a new msr. Pretty complicated
but it's good to have everything using the same units.
--
error compiling committee.c: too many arguments to function
--
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