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kvm hypervisor: Simplify kvm_for_each_vcpu with kvm_irq_delivery_to_apic

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Note that we are using APIC_DM_REMRD which has reserved usage.
In future if APIC_DM_REMRD usage is standardized, then we should
find some other way or go back to old method.

Suggested-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
Acked-by: Gleb Natapov <gleb@redhat.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
This commit is contained in:
Raghavendra K T 2013-08-26 14:18:35 +05:30 committed by Gleb Natapov
parent 6aef266c6e
commit 24d2166beb
2 changed files with 10 additions and 20 deletions
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5
arch/x86/kvm/lapic.c
View File

@ -689,7 +689,10 @@ static int __apic_accept_irq(struct kvm_lapic *apic, int delivery_mode,
break;
case APIC_DM_REMRD:
apic_debug("Ignoring delivery mode 3\n");
result = 1;
vcpu->arch.pv.pv_unhalted = 1;
kvm_make_request(KVM_REQ_EVENT, vcpu);
kvm_vcpu_kick(vcpu);
break;
case APIC_DM_SMI:

25
arch/x86/kvm/x86.c
View File

@ -5595,27 +5595,14 @@ int kvm_hv_hypercall(struct kvm_vcpu *vcpu)
*/
static void kvm_pv_kick_cpu_op(struct kvm *kvm, unsigned long flags, int apicid)
{
struct kvm_vcpu *vcpu = NULL;
int i;
struct kvm_lapic_irq lapic_irq;
kvm_for_each_vcpu(i, vcpu, kvm) {
if (!kvm_apic_present(vcpu))
continue;
lapic_irq.shorthand = 0;
lapic_irq.dest_mode = 0;
lapic_irq.dest_id = apicid;
if (kvm_apic_match_dest(vcpu, 0, 0, apicid, 0))
break;
}
if (vcpu) {
/*
* Setting unhalt flag here can result in spurious runnable
* state when unhalt reset does not happen in vcpu_block.
* But that is harmless since that should soon result in halt.
*/
vcpu->arch.pv.pv_unhalted = true;
/* We need everybody see unhalt before vcpu unblocks */
smp_wmb();
kvm_vcpu_kick(vcpu);
}
lapic_irq.delivery_mode = APIC_DM_REMRD;
kvm_irq_delivery_to_apic(kvm, 0, &lapic_irq, NULL);
}
int kvm_emulate_hypercall(struct kvm_vcpu *vcpu)