diff options
| author |  Gleb Natapov <gleb@redhat.com>
| 2010-10-14 11:22:50 +0200 |
|---|---|---|
| committer |  Avi Kivity <avi@redhat.com>
| 2011-01-12 11:23:12 +0200 |
| commit | 344d9588a9df06182684168be4f1408b55c7da3e (patch) | |
| tree | 16890e3f0f10ac767265e650a1d6d38b78780040 /arch/x86/include | |
| parent | KVM paravirt: Move kvm_smp_prepare_boot_cpu() from kvmclock.c to kvm.c. (diff) | |
| download | linux-344d9588a9df.tar.gz linux-344d9588a9df.tar.bz2 linux-344d9588a9df.zip | |
KVM: Add PV MSR to enable asynchronous page faults delivery.
Guest enables async PF vcpu functionality using this MSR.
Reviewed-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'arch/x86/include')
| -rw-r--r-- | arch/x86/include/asm/kvm_host.h | 2 | ||||
| -rw-r--r-- | arch/x86/include/asm/kvm_para.h | 4 |
2 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index c3076bcf5ef7..0d7039804b4c 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -419,6 +419,8 @@ struct kvm_vcpu_arch { struct { bool halted; gfn_t gfns[roundup_pow_of_two(ASYNC_PF_PER_VCPU)]; + struct gfn_to_hva_cache data; + u64 msr_val; } apf; }; 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 |