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| author | Liran Alon <liran.alon@oracle.com> | 2017-11-15 13:43:14 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2017-12-14 09:26:44 +0100 |
| commit | 52797bf9a875c4a30f846196386684e646e08a91 (patch) | |
| tree | 2343f9d68c7efc9519c7be36e8669d475b100c4f /arch/x86/include/asm/kvm_host.h | |
| parent | 431f5d4443964bcc58ac2e4c6fd8ace6dcd3a8d1 (diff) | |
| download | lwn-52797bf9a875c4a30f846196386684e646e08a91.tar.gz lwn-52797bf9a875c4a30f846196386684e646e08a91.zip | |
KVM: x86: Add emulation of MSR_SMI_COUNT
This MSR returns the number of #SMIs that occurred on CPU since
boot.
It was seen to be used frequently by ESXi guest.
Patch adds a new vcpu-arch specific var called smi_count to
save the number of #SMIs which occurred on CPU since boot.
It is exposed as a read-only MSR to guest (causing #GP
on wrmsr) in RDMSR/WRMSR emulation code.
MSR_SMI_COUNT is also added to emulated_msrs[] to make sure
user-space can save/restore it for migration purposes.
Signed-off-by: Liran Alon <liran.alon@oracle.com>
Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Nikita Leshenko <nikita.leshchenko@oracle.com>
Reviewed-by: Bhavesh Davda <bhavesh.davda@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Diffstat (limited to 'arch/x86/include/asm/kvm_host.h')
| -rw-r--r-- | arch/x86/include/asm/kvm_host.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 515db75081d1..340e3604dcc7 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -504,6 +504,7 @@ struct kvm_vcpu_arch { int mp_state; u64 ia32_misc_enable_msr; u64 smbase; + u64 smi_count; bool tpr_access_reporting; u64 ia32_xss; |