Commit 445caed0 authored by Vitaly Kuznetsov's avatar Vitaly Kuznetsov Committed by Paolo Bonzini
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KVM: x86: hyper-v: Honor HV_X64_EX_PROCESSOR_MASKS_RECOMMENDED bit 



Hypercalls which use extended processor masks are only available when
HV_X64_EX_PROCESSOR_MASKS_RECOMMENDED privilege bit is exposed (and
'RECOMMENDED' is rather a misnomer).

Signed-off-by: default avatarVitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
Message-Id: <20210521095204.2161214-28-vkuznets@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent d264eb3c

arch/x86/kvm/hyperv.c

+8 −0
Original line number Diff line number Diff line
@@ -2114,11 +2114,19 @@ static bool hv_check_hypercall_access(struct kvm_vcpu_hv *hv_vcpu, u16 code) 
			hv_vcpu->cpuid_cache.features_ebx & HV_DEBUGGING;

	case HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST_EX:

	case HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX:

		if (!(hv_vcpu->cpuid_cache.enlightenments_eax &

		      HV_X64_EX_PROCESSOR_MASKS_RECOMMENDED))

			return false;

		fallthrough;

	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;

	case HVCALL_SEND_IPI_EX:

		if (!(hv_vcpu->cpuid_cache.enlightenments_eax &

		      HV_X64_EX_PROCESSOR_MASKS_RECOMMENDED))

			return false;

		fallthrough;

	case HVCALL_SEND_IPI:

		return hv_vcpu->cpuid_cache.enlightenments_eax &

			HV_X64_CLUSTER_IPI_RECOMMENDED;