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KVM: x86: set TMR when the interrupt is accepted

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Do not compute TMR in advance.  Instead, set the TMR just before the interrupt
is accepted into the IRR.  This limits the coupling between IOAPIC and LAPIC.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini
2015-07-29 15:03:06 +02:00
parent 58219c1ab3
commit bdaffe1d93
5 changed files with 14 additions and 23 deletions
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5
arch/x86/kvm/x86.c
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@@ -6144,17 +6144,14 @@ static void process_smi(struct kvm_vcpu *vcpu)
static void vcpu_scan_ioapic(struct kvm_vcpu *vcpu)
{
u64 eoi_exit_bitmap[4];
u32 tmr[8];
if (!kvm_apic_hw_enabled(vcpu->arch.apic))
return;
memset(eoi_exit_bitmap, 0, 32);
memset(tmr, 0, 32);
kvm_ioapic_scan_entry(vcpu, eoi_exit_bitmap, tmr);
kvm_ioapic_scan_entry(vcpu, eoi_exit_bitmap);
kvm_x86_ops->load_eoi_exitmap(vcpu, eoi_exit_bitmap);
kvm_apic_update_tmr(vcpu, tmr);
}
static void kvm_vcpu_flush_tlb(struct kvm_vcpu *vcpu)