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| author | Radim Krčmář <rkrcmar@redhat.com> | 2015-02-27 16:32:38 +0100 |
|---|---|---|
| committer | Marcelo Tosatti <mtosatti@redhat.com> | 2015-03-02 19:04:40 -0300 |
| commit | f563db4bdb8ef5ea73d0f5ea2b20384c10fbd617 (patch) | |
| tree | 1536e267fe320ec62c2b6b788a88c8c831a37f3f /arch/x86/kvm/svm.c | |
| parent | 4ff6f8e61eb7f96d3ca535c6d240f863ccd6fb7d (diff) | |
| download | op-kernel-dev-f563db4bdb8ef5ea73d0f5ea2b20384c10fbd617.zip op-kernel-dev-f563db4bdb8ef5ea73d0f5ea2b20384c10fbd617.tar.gz | |
KVM: SVM: fix interrupt injection (apic->isr_count always 0)
In commit b4eef9b36db4, we started to use hwapic_isr_update() != NULL
instead of kvm_apic_vid_enabled(vcpu->kvm). This didn't work because
SVM had it defined and "apicv" path in apic_{set,clear}_isr() does not
change apic->isr_count, because it should always be 1. The initial
value of apic->isr_count was based on kvm_apic_vid_enabled(vcpu->kvm),
which is always 0 for SVM, so KVM could have injected interrupts when it
shouldn't.
Fix it by implicitly setting SVM's hwapic_isr_update to NULL and make the
initial isr_count depend on hwapic_isr_update() for good measure.
Fixes: b4eef9b36db4 ("kvm: x86: vmx: NULL out hwapic_isr_update() in case of !enable_apicv")
Reported-and-tested-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'arch/x86/kvm/svm.c')
| -rw-r--r-- | arch/x86/kvm/svm.c | 6 |
1 files changed, 0 insertions, 6 deletions
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index d319e0c..cc618c8 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -3649,11 +3649,6 @@ static void svm_load_eoi_exitmap(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap) return; } -static void svm_hwapic_isr_update(struct kvm *kvm, int isr) -{ - return; -} - static void svm_sync_pir_to_irr(struct kvm_vcpu *vcpu) { return; @@ -4403,7 +4398,6 @@ static struct kvm_x86_ops svm_x86_ops = { .set_virtual_x2apic_mode = svm_set_virtual_x2apic_mode, .vm_has_apicv = svm_vm_has_apicv, .load_eoi_exitmap = svm_load_eoi_exitmap, - .hwapic_isr_update = svm_hwapic_isr_update, .sync_pir_to_irr = svm_sync_pir_to_irr, .set_tss_addr = svm_set_tss_addr, |
