Messages in this thread Patch in this message | | | From | Vitaly Kuznetsov <> | Subject | [PATCH v2 25/30] KVM: x86: hyper-v: Honor HV_X64_REMOTE_TLB_FLUSH_RECOMMENDED bit | Date | Fri, 21 May 2021 11:51:59 +0200 |
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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 <vkuznets@redhat.com> --- 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 36ec688cda4e..f99072e092d0 100644 --- a/arch/x86/kvm/hyperv.c +++ b/arch/x86/kvm/hyperv.c @@ -2044,6 +2044,12 @@ 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; } -- 2.31.1
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