[Qemu-ppc] [RFC PATCH 04/17] KVM: PPC64: booke: Add guest computation mode for irq delivery

[Mihai Caraman]

When delivering guest IRQs, update MSR computaion mode according to guest
interrupt computation mode found in EPCR.

Signed-off-by: Mihai Caraman <address@hidden>
---
 arch/powerpc/kvm/booke.c |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c
index d15c4b5..93b48e0 100644
--- a/arch/powerpc/kvm/booke.c
+++ b/arch/powerpc/kvm/booke.c
@@ -287,6 +287,7 @@ static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu 
*vcpu,
        bool crit;
        bool keep_irq = false;
        enum int_class int_class;
+       ulong msr_cm = 0;
 
        /* Truncate crit indicators in 32 bit mode */
        if (!(vcpu->arch.shared->msr & MSR_SF)) {
@@ -299,6 +300,10 @@ static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu 
*vcpu,
        /* ... and we're in supervisor mode */
        crit = crit && !(vcpu->arch.shared->msr & MSR_PR);
 
+#ifdef CONFIG_64BIT
+       msr_cm = vcpu->arch.epcr & SPRN_EPCR_ICM ? MSR_CM : 0;
+#endif
+
        if (priority == BOOKE_IRQPRIO_EXTERNAL_LEVEL) {
                priority = BOOKE_IRQPRIO_EXTERNAL;
                keep_irq = true;
@@ -381,7 +386,8 @@ static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu 
*vcpu,
                        set_guest_esr(vcpu, vcpu->arch.queued_esr);
                if (update_dear == true)
                        set_guest_dear(vcpu, vcpu->arch.queued_dear);
-               kvmppc_set_msr(vcpu, vcpu->arch.shared->msr & msr_mask);
+               kvmppc_set_msr(vcpu, (vcpu->arch.shared->msr & msr_mask)
+                               | msr_cm);
 
                if (!keep_irq)
                        clear_bit(priority, &vcpu->arch.pending_exceptions);
-- 
1.7.4.1