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KVM: x86: hyper-v: Honor HV_X64_EX_PROCESSOR_MASKS_RECOMMENDED bit

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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: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20210521095204.2161214-28-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Vitaly Kuznetsov 2021-05-21 11:52:01 +02:00 committed by Paolo Bonzini
parent d264eb3c14
commit 445caed021
1 changed files with 8 additions and 0 deletions
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8
arch/x86/kvm/hyperv.c
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@ -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;