From bb53ecb4d6ea453e55a971295e55dbf76adc0f8c Mon Sep 17 00:00:00 2001 From: Vitaly Kuznetsov Date: Fri, 21 May 2021 11:51:59 +0200 Subject: [PATCH] KVM: x86: hyper-v: Honor HV_X64_REMOTE_TLB_FLUSH_RECOMMENDED bit Hyper-V partition must possess 'HV_X64_REMOTE_TLB_FLUSH_RECOMMENDED' privilege ('recommended' is rather a misnomer) to issue HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST/SPACE hypercalls. Signed-off-by: Vitaly Kuznetsov Signed-off-by: Paolo Bonzini Message-Id: <20210521095204.2161214-26-vkuznets@redhat.com> Signed-off-by: Paolo Bonzini --- arch/x86/kvm/hyperv.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c index 3d6b448ab18f6..831279976d9f1 100644 --- a/arch/x86/kvm/hyperv.c +++ b/arch/x86/kvm/hyperv.c @@ -2112,6 +2112,12 @@ static bool hv_check_hypercall_access(struct kvm_vcpu_hv *hv_vcpu, u16 code) */ return !kvm_hv_is_syndbg_enabled(hv_vcpu->vcpu) || hv_vcpu->cpuid_cache.features_ebx & HV_DEBUGGING; + case HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST_EX: + case HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX: + 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; default: break; } -- 2.30.2