xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

KVM: Non-atomic interrupt injection

Browse Source 
Change the interrupt injection code to work from preemptible, interrupts
enabled context.  This works by adding a ->cancel_injection() operation
that undoes an injection in case we were not able to actually enter the guest
(this condition could never happen with atomic injection).

Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Avi Kivity
2010-07-20 15:06:17 +03:00
parent 83422e17c1
commit b463a6f744
4 changed files with 48 additions and 28 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
arch/x86/kvm/svm.c
View File

@@ -3261,6 +3261,17 @@ static void svm_complete_interrupts(struct vcpu_svm *svm)
}
}
static void svm_cancel_injection(struct kvm_vcpu *vcpu)
{
struct vcpu_svm *svm = to_svm(vcpu);
struct vmcb_control_area *control = &svm->vmcb->control;
control->exit_int_info = control->event_inj;
control->exit_int_info_err = control->event_inj_err;
control->event_inj = 0;
svm_complete_interrupts(svm);
}
#ifdef CONFIG_X86_64
#define R "r"
#else
@@ -3631,6 +3642,7 @@ static struct kvm_x86_ops svm_x86_ops = {
.set_irq = svm_set_irq,
.set_nmi = svm_inject_nmi,
.queue_exception = svm_queue_exception,
.cancel_injection = svm_cancel_injection,
.interrupt_allowed = svm_interrupt_allowed,
.nmi_allowed = svm_nmi_allowed,
.get_nmi_mask = svm_get_nmi_mask,