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| author | Vitaly Kuznetsov <vkuznets@redhat.com> | 2018-10-16 18:50:01 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2018-10-17 00:30:14 +0200 |
| commit | 57b119da3594f5145a64fdebe0ac9ee0cc65f371 (patch) | |
| tree | eda660f821fba5b44f0c18057ab98646ac6b3fa0 /arch/x86/kvm/svm.c | |
| parent | 5d7a6443368e48ca041fea086e345420c027a8cd (diff) | |
| download | lwn-57b119da3594f5145a64fdebe0ac9ee0cc65f371.tar.gz lwn-57b119da3594f5145a64fdebe0ac9ee0cc65f371.zip | |
KVM: nVMX: add KVM_CAP_HYPERV_ENLIGHTENED_VMCS capability
Enlightened VMCS is opt-in. The current version does not contain all
fields supported by nested VMX so we must not advertise the
corresponding VMX features if enlightened VMCS is enabled.
Userspace is given the enlightened VMCS version supported by KVM as
part of enabling KVM_CAP_HYPERV_ENLIGHTENED_VMCS. The version is to
be advertised to the nested hypervisor, currently done via a cpuid
leaf for Hyper-V.
Suggested-by: Ladi Prosek <lprosek@redhat.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Liran Alon <liran.alon@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/svm.c')
| -rw-r--r-- | arch/x86/kvm/svm.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 2936c63bcc2f..47b07211c5b1 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -7036,6 +7036,13 @@ failed: return ret; } +static int nested_enable_evmcs(struct kvm_vcpu *vcpu, + uint16_t *vmcs_version) +{ + /* Intel-only feature */ + return -ENODEV; +} + static struct kvm_x86_ops svm_x86_ops __ro_after_init = { .cpu_has_kvm_support = has_svm, .disabled_by_bios = is_disabled, @@ -7165,6 +7172,8 @@ static struct kvm_x86_ops svm_x86_ops __ro_after_init = { .mem_enc_op = svm_mem_enc_op, .mem_enc_reg_region = svm_register_enc_region, .mem_enc_unreg_region = svm_unregister_enc_region, + + .nested_enable_evmcs = nested_enable_evmcs, }; static int __init svm_init(void) |