Commit a60b3c59 authored by Vitaly Kuznetsov's avatar Vitaly Kuznetsov Committed by Paolo Bonzini
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KVM: x86: hyper-v: Honor HV_SIGNAL_EVENTS privilege bit 



Hyper-V partition must possess 'HV_SIGNAL_EVENTS' privilege to issue
HVCALL_SIGNAL_EVENT hypercalls.

Signed-off-by: default avatarVitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
Message-Id: <20210521095204.2161214-24-vkuznets@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 4f532b7f

arch/x86/kvm/hyperv.c

+2 −0
Original line number Diff line number Diff line
@@ -2101,6 +2101,8 @@ static bool hv_check_hypercall_access(struct kvm_vcpu_hv *hv_vcpu, u16 code) 
			hv_vcpu->cpuid_cache.enlightenments_ebx != U32_MAX;

	case HVCALL_POST_MESSAGE:

		return hv_vcpu->cpuid_cache.features_ebx & HV_POST_MESSAGES;

	case HVCALL_SIGNAL_EVENT:

		return hv_vcpu->cpuid_cache.features_ebx & HV_SIGNAL_EVENTS;

	default:

		break;

	}