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KVM: PPC: BookE: Add support for vcpu->mode

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Generic KVM code might want to know whether we are inside guest context
or outside. It also wants to be able to push us out of guest context.

Add support to the BookE code for the generic vcpu->mode field that describes
the above states.

Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Alexander Graf 2012-08-08 20:44:20 +02:00
parent 4ffc6356ec
commit d69c643644
1 changed files with 11 additions and 0 deletions
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11
arch/powerpc/kvm/booke.c
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@ -501,6 +501,15 @@ static int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu)
continue;
}
if (vcpu->mode == EXITING_GUEST_MODE) {
r = 1;
break;
}
/* Going into guest context! Yay! */
vcpu->mode = IN_GUEST_MODE;
smp_wmb();
break;
}
@ -572,6 +581,8 @@ int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
kvm_guest_exit();
out:
vcpu->mode = OUTSIDE_GUEST_MODE;
smp_wmb();
local_irq_enable();
return ret;
}