diff options
| author | Scott Wood <scottwood@freescale.com> | 2011-11-08 18:23:25 -0600 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2012-03-05 14:52:26 +0200 |
| commit | c59a6a3e4e5976a938e21faf3da65a2784187aa7 (patch) | |
| tree | b15779d6ac698f588762a0c42f504e178f630875 | |
| parent | 25051b5a5aff0bb71435421b4b80279b789fa0dc (diff) | |
KVM: PPC: booke: Check for MSR[WE] in prepare_to_enter
This prevents us from inappropriately blocking in a KVM_SET_REGS
ioctl -- the MSR[WE] will take effect when the guest is next entered.
It also causes SRR1[WE] to be set when we enter the guest's interrupt
handler, which is what e500 hardware is documented to do.
Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
| -rw-r--r-- | arch/powerpc/kvm/booke.c | 28 |
1 files changed, 18 insertions, 10 deletions
diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c index feaefc433276..557f028a9ad4 100644 --- a/arch/powerpc/kvm/booke.c +++ b/arch/powerpc/kvm/booke.c @@ -124,12 +124,6 @@ void kvmppc_set_msr(struct kvm_vcpu *vcpu, u32 new_msr) vcpu->arch.shared->msr = new_msr; kvmppc_mmu_msr_notify(vcpu, old_msr); - - if (vcpu->arch.shared->msr & MSR_WE) { - kvm_vcpu_block(vcpu); - kvmppc_set_exit_type(vcpu, EMULATED_MTMSRWE_EXITS); - }; - kvmppc_vcpu_sync_spe(vcpu); } @@ -288,15 +282,12 @@ static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu, return allowed; } -/* Check pending exceptions and deliver one, if possible. */ -void kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu) +static void kvmppc_core_check_exceptions(struct kvm_vcpu *vcpu) { unsigned long *pending = &vcpu->arch.pending_exceptions; unsigned long old_pending = vcpu->arch.pending_exceptions; unsigned int priority; - WARN_ON_ONCE(!irqs_disabled()); - priority = __ffs(*pending); while (priority <= BOOKE_IRQPRIO_MAX) { if (kvmppc_booke_irqprio_deliver(vcpu, priority)) @@ -314,6 +305,23 @@ void kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu) vcpu->arch.shared->int_pending = 0; } +/* Check pending exceptions and deliver one, if possible. */ +void kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu) +{ + WARN_ON_ONCE(!irqs_disabled()); + + kvmppc_core_check_exceptions(vcpu); + + if (vcpu->arch.shared->msr & MSR_WE) { + local_irq_enable(); + kvm_vcpu_block(vcpu); + local_irq_disable(); + + kvmppc_set_exit_type(vcpu, EMULATED_MTMSRWE_EXITS); + kvmppc_core_check_exceptions(vcpu); + }; +} + int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) { int ret; |