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| author | Alexander Graf <agraf@suse.de> | 2010-08-30 14:03:24 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2010-10-24 10:52:20 +0200 |
| commit | c5335f17651de5075313524ccc3881527268966f (patch) | |
| tree | d81c88bb7ab6af6940d116d0fc31189f2576e21e /arch/powerpc | |
| parent | 7b4203e8cb5c5d9bc49da62b7a6fa4ba876a1b3f (diff) | |
| download | linux-c5335f17651de5075313524ccc3881527268966f.tar.gz linux-c5335f17651de5075313524ccc3881527268966f.tar.xz | |
KVM: PPC: Implement level interrupts for BookE
BookE also wants to support level based interrupts, so let's implement
all the necessary logic there. We need to trick a bit here because the
irqprios are 1:1 assigned to architecture defined values. But since there
is some space left there, we can just pick a random one and move it later
on - it's internal anyways.
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/kvm/booke.c | 17 | ||||
| -rw-r--r-- | arch/powerpc/kvm/booke.h | 4 |
2 files changed, 18 insertions, 3 deletions
diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c index 835f6d0e4f20..77575d08c818 100644 --- a/arch/powerpc/kvm/booke.c +++ b/arch/powerpc/kvm/booke.c @@ -131,13 +131,19 @@ void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu) void kvmppc_core_queue_external(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq) { - kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_EXTERNAL); + unsigned int prio = BOOKE_IRQPRIO_EXTERNAL; + + if (irq->irq == KVM_INTERRUPT_SET_LEVEL) + prio = BOOKE_IRQPRIO_EXTERNAL_LEVEL; + + kvmppc_booke_queue_irqprio(vcpu, prio); } void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq) { clear_bit(BOOKE_IRQPRIO_EXTERNAL, &vcpu->arch.pending_exceptions); + clear_bit(BOOKE_IRQPRIO_EXTERNAL_LEVEL, &vcpu->arch.pending_exceptions); } /* Deliver the interrupt of the corresponding priority, if possible. */ @@ -150,6 +156,7 @@ static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu, ulong crit_raw = vcpu->arch.shared->critical; ulong crit_r1 = kvmppc_get_gpr(vcpu, 1); bool crit; + bool keep_irq = false; /* Truncate crit indicators in 32 bit mode */ if (!(vcpu->arch.shared->msr & MSR_SF)) { @@ -162,6 +169,11 @@ static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu, /* ... and we're in supervisor mode */ crit = crit && !(vcpu->arch.shared->msr & MSR_PR); + if (priority == BOOKE_IRQPRIO_EXTERNAL_LEVEL) { + priority = BOOKE_IRQPRIO_EXTERNAL; + keep_irq = true; + } + switch (priority) { case BOOKE_IRQPRIO_DTLB_MISS: case BOOKE_IRQPRIO_DATA_STORAGE: @@ -214,7 +226,8 @@ static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu, vcpu->arch.shared->dar = vcpu->arch.queued_dear; kvmppc_set_msr(vcpu, vcpu->arch.shared->msr & msr_mask); - clear_bit(priority, &vcpu->arch.pending_exceptions); + if (!keep_irq) + clear_bit(priority, &vcpu->arch.pending_exceptions); } return allowed; diff --git a/arch/powerpc/kvm/booke.h b/arch/powerpc/kvm/booke.h index 88258acc98fa..492bb7030358 100644 --- a/arch/powerpc/kvm/booke.h +++ b/arch/powerpc/kvm/booke.h @@ -46,7 +46,9 @@ #define BOOKE_IRQPRIO_FIT 17 #define BOOKE_IRQPRIO_DECREMENTER 18 #define BOOKE_IRQPRIO_PERFORMANCE_MONITOR 19 -#define BOOKE_IRQPRIO_MAX 19 +/* Internal pseudo-irqprio for level triggered externals */ +#define BOOKE_IRQPRIO_EXTERNAL_LEVEL 20 +#define BOOKE_IRQPRIO_MAX 20 extern unsigned long kvmppc_booke_handlers; |