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KVM: Emulate hlt in the kernel

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By sleeping in the kernel when hlt is executed, we simplify the in-kernel
guest interrupt path considerably.

Signed-off-by: Gregory Haskins <ghaskins@novell.com>
Signed-off-by: Yaozu (Eddie) Dong <eddie.dong@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Eddie Dong
2007-07-18 12:15:21 +03:00
committed by Avi Kivity
parent 1fd4f2a5ed
commit b6958ce44a
7 changed files with 57 additions and 11 deletions
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9
drivers/kvm/svm.c
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@@ -1398,9 +1398,12 @@ static void do_interrupt_requests(struct vcpu_svm *svm,
static void post_kvm_run_save(struct vcpu_svm *svm,
struct kvm_run *kvm_run)
{
kvm_run->ready_for_interrupt_injection
= (svm->vcpu.interrupt_window_open &&
svm->vcpu.irq_summary == 0);
if (irqchip_in_kernel(svm->vcpu.kvm))
kvm_run->ready_for_interrupt_injection = 1;
else
kvm_run->ready_for_interrupt_injection =
(svm->vcpu.interrupt_window_open &&
svm->vcpu.irq_summary == 0);
kvm_run->if_flag = (svm->vmcb->save.rflags & X86_EFLAGS_IF) != 0;
kvm_run->cr8 = get_cr8(&svm->vcpu);
kvm_run->apic_base = kvm_get_apic_base(&svm->vcpu);