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| author | Maxim Levitsky <mlevitsk@redhat.com> | 2021-11-08 11:02:45 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-11-11 10:56:20 -0500 |
| commit | cae72dcc3b219c6f85f543ab34452d7c7fe664c0 (patch) | |
| tree | 9b16f7a9608012029394ae21e5564c04461987f9 /arch/x86/kvm/vmx/vmx.c | |
| parent | e6cd31f1a8ce2f1150225ae176a08d12119e2444 (diff) | |
| download | lwn-cae72dcc3b219c6f85f543ab34452d7c7fe664c0.tar.gz lwn-cae72dcc3b219c6f85f543ab34452d7c7fe664c0.zip | |
KVM: x86: inhibit APICv when KVM_GUESTDBG_BLOCKIRQ active
KVM_GUESTDBG_BLOCKIRQ relies on interrupts being injected using
standard kvm's inject_pending_event, and not via APICv/AVIC.
Since this is a debug feature, just inhibit APICv/AVIC while
KVM_GUESTDBG_BLOCKIRQ is in use on at least one vCPU.
Fixes: 61e5f69ef0837 ("KVM: x86: implement KVM_GUESTDBG_BLOCKIRQ")
Reported-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Tested-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20211108090245.166408-1-mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/vmx/vmx.c')
| -rw-r--r-- | arch/x86/kvm/vmx/vmx.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index 71f54d85f104..e4fc9ff7cd94 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -7565,7 +7565,8 @@ static void hardware_unsetup(void) static bool vmx_check_apicv_inhibit_reasons(ulong bit) { ulong supported = BIT(APICV_INHIBIT_REASON_DISABLE) | - BIT(APICV_INHIBIT_REASON_HYPERV); + BIT(APICV_INHIBIT_REASON_HYPERV) | + BIT(APICV_INHIBIT_REASON_BLOCKIRQ); return supported & BIT(bit); } |