Commit bb53ecb4 authored by Vitaly Kuznetsov's avatar Vitaly Kuznetsov Committed by Paolo Bonzini
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KVM: x86: hyper-v: Honor HV_X64_REMOTE_TLB_FLUSH_RECOMMENDED bit 



Hyper-V partition must possess 'HV_X64_REMOTE_TLB_FLUSH_RECOMMENDED'
privilege ('recommended' is rather a misnomer) to issue
HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST/SPACE hypercalls.

Signed-off-by: default avatarVitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
Message-Id: <20210521095204.2161214-26-vkuznets@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent a921cf83

arch/x86/kvm/hyperv.c

+6 −0
Original line number Diff line number Diff line
@@ -2112,6 +2112,12 @@ static bool hv_check_hypercall_access(struct kvm_vcpu_hv *hv_vcpu, u16 code) 
		 */

		return !kvm_hv_is_syndbg_enabled(hv_vcpu->vcpu) ||

			hv_vcpu->cpuid_cache.features_ebx & HV_DEBUGGING;

	case HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST_EX:

	case HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX:

	case HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST:

	case HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE:

		return hv_vcpu->cpuid_cache.enlightenments_eax &

			HV_X64_REMOTE_TLB_FLUSH_RECOMMENDED;

	default:

		break;

	}