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

[Vitaly Kuznetsov]

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 <vkuzn...@redhat.com>
---
 arch/x86/kvm/hyperv.c | 4 ++++
 1 file changed, 4 insertions(+)

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;
        }
-- 
2.30.2