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KVM: x86: hyper-v: Honor HV_X64_CLUSTER_IPI_RECOMMENDED bit

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Hyper-V partition must possess 'HV_X64_CLUSTER_IPI_RECOMMENDED'
privilege ('recommended' is rather a misnomer) to issue
HVCALL_SEND_IPI hypercalls.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20210521095204.2161214-27-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Vitaly Kuznetsov 2021-05-21 11:52:00 +02:00 • committed by Paolo Bonzini
parent bb53ecb4d6
commit d264eb3c14
1 changed files with 4 additions and 0 deletions
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4
arch/x86/kvm/hyperv.c
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@ -2118,6 +2118,10 @@ static bool hv_check_hypercall_access(struct kvm_vcpu_hv *hv_vcpu, u16 code)
case HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE: case HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE:
return hv_vcpu->cpuid_cache.enlightenments_eax & return hv_vcpu->cpuid_cache.enlightenments_eax &
HV_X64_REMOTE_TLB_FLUSH_RECOMMENDED; HV_X64_REMOTE_TLB_FLUSH_RECOMMENDED;
case HVCALL_SEND_IPI_EX:
case HVCALL_SEND_IPI:
return hv_vcpu->cpuid_cache.enlightenments_eax &
HV_X64_CLUSTER_IPI_RECOMMENDED;
default: default:
break; break;
} }