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KVM: PPC: BookE: Add check_requests helper function

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We need a central place to check for pending requests in. Add one that
only does the timer check we already do in a different place.

Later, this central function can be extended by more checks.

Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Alexander Graf 2012-08-08 20:31:13 +02:00
parent 8043e494da
commit 4ffc6356ec
1 changed files with 17 additions and 7 deletions
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24
arch/powerpc/kvm/booke.c
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@ -419,13 +419,6 @@ static void kvmppc_core_check_exceptions(struct kvm_vcpu *vcpu)
unsigned long *pending = &vcpu->arch.pending_exceptions;
unsigned int priority;
if (vcpu->requests) {
if (kvm_check_request(KVM_REQ_PENDING_TIMER, vcpu)) {
smp_mb();
update_timer_ints(vcpu);
}
}
priority = __ffs(*pending);
while (priority < BOOKE_IRQPRIO_MAX) {
if (kvmppc_booke_irqprio_deliver(vcpu, priority))
@ -461,6 +454,14 @@ int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu)
return r;
}
static void kvmppc_check_requests(struct kvm_vcpu *vcpu)
{
if (vcpu->requests) {
if (kvm_check_request(KVM_REQ_PENDING_TIMER, vcpu))
update_timer_ints(vcpu);
}
}
/*
* Common checks before entering the guest world. Call with interrupts
* disabled.
@ -485,6 +486,15 @@ static int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu)
break;
}
smp_mb();
if (vcpu->requests) {
/* Make sure we process requests preemptable */
local_irq_enable();
kvmppc_check_requests(vcpu);
local_irq_disable();
continue;
}
if (kvmppc_core_prepare_to_enter(vcpu)) {
/* interrupts got enabled in between, so we
are back at square 1 */