diff options
| author | Vitaly Kuznetsov <vkuznets@redhat.com> | 2021-05-21 11:51:37 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-06-17 19:09:38 +0200 |
| commit | 10d7bf1e46dc19d964f0f67d2a6d20df907742d1 (patch) | |
| tree | 206e1f232352ee6aff49bdb5e72c4a4e52342cb5 /arch/x86/include/asm | |
| parent | KVM: x86: hyper-v: Introduce KVM_CAP_HYPERV_ENFORCE_CPUID (diff) | |
| download | linux-10d7bf1e46dc19d964f0f67d2a6d20df907742d1.tar.xz linux-10d7bf1e46dc19d964f0f67d2a6d20df907742d1.zip | |
KVM: x86: hyper-v: Cache guest CPUID leaves determining features availability
Limiting exposed Hyper-V features requires a fast way to check if the
particular feature is exposed in guest visible CPUIDs or not. To aboid
looping through all CPUID entries on every hypercall/MSR access cache
the required leaves on CPUID update.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20210521095204.2161214-4-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/include/asm')
| -rw-r--r-- | arch/x86/include/asm/kvm_host.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 556a8ec89451..95b254b5a523 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -544,6 +544,14 @@ struct kvm_vcpu_hv { DECLARE_BITMAP(stimer_pending_bitmap, HV_SYNIC_STIMER_COUNT); cpumask_t tlb_flush; bool enforce_cpuid; + struct { + u32 features_eax; /* HYPERV_CPUID_FEATURES.EAX */ + u32 features_ebx; /* HYPERV_CPUID_FEATURES.EBX */ + u32 features_edx; /* HYPERV_CPUID_FEATURES.EDX */ + u32 enlightenments_eax; /* HYPERV_CPUID_ENLIGHTMENT_INFO.EAX */ + u32 enlightenments_ebx; /* HYPERV_CPUID_ENLIGHTMENT_INFO.EBX */ + u32 syndbg_cap_eax; /* HYPERV_CPUID_SYNDBG_PLATFORM_CAPABILITIES.EAX */ + } cpuid_cache; }; /* Xen HVM per vcpu emulation context */ |