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| author | Vitaly Kuznetsov <vkuznets@redhat.com> | 2021-05-21 11:51:36 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-06-17 13:09:38 -0400 |
| commit | 644f706719f0297bc5f65c8891de1c32f042eae5 (patch) | |
| tree | 52bc3f0c3d4dfcc9f9af9a0672fd078a5cde5bda /Documentation/virt | |
| parent | f15cdceab543059a9afd9e6277cf15d56d7dfd82 (diff) | |
| download | linux-644f706719f0297bc5f65c8891de1c32f042eae5.tar.bz2 | |
KVM: x86: hyper-v: Introduce KVM_CAP_HYPERV_ENFORCE_CPUID
Modeled after KVM_CAP_ENFORCE_PV_FEATURE_CPUID, the new capability allows
for limiting Hyper-V features to those exposed to the guest in Hyper-V
CPUIDs (0x40000003, 0x40000004, ...).
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20210521095204.2161214-3-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'Documentation/virt')
| -rw-r--r-- | Documentation/virt/kvm/api.rst | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/Documentation/virt/kvm/api.rst b/Documentation/virt/kvm/api.rst index 7fcb2fd38f42..80154d5d98a1 100644 --- a/Documentation/virt/kvm/api.rst +++ b/Documentation/virt/kvm/api.rst @@ -6891,3 +6891,14 @@ This capability is always enabled. This capability indicates that the KVM virtual PTP service is supported in the host. A VMM can check whether the service is available to the guest on migration. + +8.33 KVM_CAP_HYPERV_ENFORCE_CPUID +----------------------------- + +Architectures: x86 + +When enabled, KVM will disable emulated Hyper-V features provided to the +guest according to the bits Hyper-V CPUID feature leaves. Otherwise, all +currently implmented Hyper-V features are provided unconditionally when +Hyper-V identification is set in the HYPERV_CPUID_INTERFACE (0x40000001) +leaf. |