From: Vitaly Kuznetsov Date: Fri, 21 May 2021 09:51:56 +0000 (+0200) Subject: KVM: x86: hyper-v: Honor HV_POST_MESSAGES privilege bit X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=4f532b7f969fcba010703fe21e0a85f662373041;p=linux.git KVM: x86: hyper-v: Honor HV_POST_MESSAGES privilege bit Hyper-V partition must possess 'HV_POST_MESSAGES' privilege to issue HVCALL_POST_MESSAGE hypercalls. Signed-off-by: Vitaly Kuznetsov Signed-off-by: Paolo Bonzini Message-Id: <20210521095204.2161214-23-vkuznets@redhat.com> Signed-off-by: Paolo Bonzini --- diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c index 13bfa4e0b93db..293619998c385 100644 --- a/arch/x86/kvm/hyperv.c +++ b/arch/x86/kvm/hyperv.c @@ -2099,6 +2099,8 @@ static bool hv_check_hypercall_access(struct kvm_vcpu_hv *hv_vcpu, u16 code) case HVCALL_NOTIFY_LONG_SPIN_WAIT: return hv_vcpu->cpuid_cache.enlightenments_ebx && hv_vcpu->cpuid_cache.enlightenments_ebx != U32_MAX; + case HVCALL_POST_MESSAGE: + return hv_vcpu->cpuid_cache.features_ebx & HV_POST_MESSAGES; default: break; }