Commit b7685cfd authored by Vitaly Kuznetsov's avatar Vitaly Kuznetsov Committed by Paolo Bonzini

KVM: nVMX: Force enlightened VMCS sync from nested_vmx_failValid()

'need_vmcs12_to_shadow_sync' is used for both shadow and enlightened
VMCS sync when we exit to L1. The comment in nested_vmx_failValid()
validly states why shadow vmcs sync can be omitted but this doesn't
apply to enlightened VMCS as it 'shadows' all VMCS12 fields.
Reviewed-by: default avatarMaxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: default avatarVitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
Message-Id: <20210526132026.270394-9-vkuznets@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent d6bf71a1
......@@ -173,9 +173,13 @@ static int nested_vmx_failValid(struct kvm_vcpu *vcpu,
| X86_EFLAGS_ZF);
get_vmcs12(vcpu)->vm_instruction_error = vm_instruction_error;
/*
* We don't need to force a shadow sync because
* VM_INSTRUCTION_ERROR is not shadowed
* We don't need to force sync to shadow VMCS because
* VM_INSTRUCTION_ERROR is not shadowed. Enlightened VMCS 'shadows' all
* fields and thus must be synced.
*/
if (to_vmx(vcpu)->nested.hv_evmcs_vmptr != EVMPTR_INVALID)
to_vmx(vcpu)->nested.need_vmcs12_to_shadow_sync = true;
return kvm_skip_emulated_instruction(vcpu);
}
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment