提交 8fe54654 编写于 作者: J Joerg Roedel 提交者: Avi Kivity

KVM: SVM: Fix wrong interrupt injection in enable_irq_windows

The nested_svm_intr() function does not execute the vmexit
anymore. Therefore we may still be in the nested state after
that function ran. This patch changes the nested_svm_intr()
function to return wether the irq window could be enabled.

Cc: stable@kernel.org
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>
上级 112592da
......@@ -1432,16 +1432,17 @@ static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr,
return vmexit;
}
static inline int nested_svm_intr(struct vcpu_svm *svm)
/* This function returns true if it is save to enable the irq window */
static inline bool nested_svm_intr(struct vcpu_svm *svm)
{
if (!is_nested(svm))
return 0;
return true;
if (!(svm->vcpu.arch.hflags & HF_VINTR_MASK))
return 0;
return true;
if (!(svm->vcpu.arch.hflags & HF_HIF_MASK))
return 0;
return false;
svm->vmcb->control.exit_code = SVM_EXIT_INTR;
......@@ -1454,10 +1455,10 @@ static inline int nested_svm_intr(struct vcpu_svm *svm)
*/
svm->nested.exit_required = true;
trace_kvm_nested_intr_vmexit(svm->vmcb->save.rip);
return 1;
return false;
}
return 0;
return true;
}
static void *nested_svm_map(struct vcpu_svm *svm, u64 gpa, struct page **_page)
......@@ -2629,13 +2630,11 @@ static void enable_irq_window(struct kvm_vcpu *vcpu)
{
struct vcpu_svm *svm = to_svm(vcpu);
nested_svm_intr(svm);
/* In case GIF=0 we can't rely on the CPU to tell us when
* GIF becomes 1, because that's a separate STGI/VMRUN intercept.
* The next time we get that intercept, this function will be
* called again though and we'll get the vintr intercept. */
if (gif_set(svm)) {
if (gif_set(svm) && nested_svm_intr(svm)) {
svm_set_vintr(svm);
svm_inject_irq(svm, 0x0);
}
......
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