From 344d9588a9df06182684168be4f1408b55c7da3e Mon Sep 17 00:00:00 2001 From: Gleb Natapov Date: Thu, 14 Oct 2010 11:22:50 +0200 Subject: KVM: Add PV MSR to enable asynchronous page faults delivery. Guest enables async PF vcpu functionality using this MSR. Reviewed-by: Rik van Riel Signed-off-by: Gleb Natapov Signed-off-by: Marcelo Tosatti --- arch/x86/include/asm/kvm_para.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'arch/x86/include/asm/kvm_para.h') diff --git a/arch/x86/include/asm/kvm_para.h b/arch/x86/include/asm/kvm_para.h index e3faaaf4301e..8662ae0a035c 100644 --- a/arch/x86/include/asm/kvm_para.h +++ b/arch/x86/include/asm/kvm_para.h @@ -20,6 +20,7 @@ * are available. The use of 0x11 and 0x12 is deprecated */ #define KVM_FEATURE_CLOCKSOURCE2 3 +#define KVM_FEATURE_ASYNC_PF 4 /* The last 8 bits are used to indicate how to interpret the flags field * in pvclock structure. If no bits are set, all flags are ignored. @@ -32,9 +33,12 @@ /* Custom MSRs falls in the range 0x4b564d00-0x4b564dff */ #define MSR_KVM_WALL_CLOCK_NEW 0x4b564d00 #define MSR_KVM_SYSTEM_TIME_NEW 0x4b564d01 +#define MSR_KVM_ASYNC_PF_EN 0x4b564d02 #define KVM_MAX_MMU_OP_BATCH 32 +#define KVM_ASYNC_PF_ENABLED (1 << 0) + /* Operations for KVM_HC_MMU_OP */ #define KVM_MMU_OP_WRITE_PTE 1 #define KVM_MMU_OP_FLUSH_TLB 2 -- cgit v1.2.3