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[v2,26/30] KVM: x86: hyper-v: Honor HV_X64_CLUSTER_IPI_RECOMMENDED bit

Message ID 20210521095204.2161214-27-vkuznets@redhat.com (mailing list archive)
State New, archived
Headers show
Series KVM: x86: hyper-v: Fine-grained access check to Hyper-V hypercalls and MSRs | expand

Commit Message

Vitaly Kuznetsov May 21, 2021, 9:52 a.m. UTC 
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>
---
 arch/x86/kvm/hyperv.c | 4 ++++
 1 file changed, 4 insertions(+)
diff mbox series

Patch

diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c
index f99072e092d0..ba5af4d27ccf 100644
--- a/arch/x86/kvm/hyperv.c
+++ b/arch/x86/kvm/hyperv.c
@@ -2050,6 +2050,10 @@  static bool hv_check_hypercall_access(struct kvm_vcpu_hv *hv_vcpu, u16 code)
 	case HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE:
 		return hv_vcpu->cpuid_cache.enlightenments_eax &
 			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:
 		break;
 	}