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KVM: PPC: booke: use shadow_msr

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Keep the guest MSR and the guest-mode true MSR separate, rather than
modifying the guest MSR on each guest entry to produce a true MSR.

Any bits which should be modified based on guest MSR must be explicitly
propagated from vcpu->arch.shared->msr to vcpu->arch.shadow_msr in
kvmppc_set_msr().

While we're modifying the guest entry code, reorder a few instructions
to bury some load latencies.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Scott Wood
2011-06-14 18:34:29 -05:00
committed by Avi Kivity
parent c51584d52e
commit ecee273fc4
4 changed files with 9 additions and 13 deletions
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arch/powerpc/kvm/booke.c
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@ -514,6 +514,7 @@ int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
vcpu->arch.pc = 0;
vcpu->arch.shared->msr = 0;
vcpu->arch.shadow_msr = MSR_USER | MSR_DE | MSR_IS | MSR_DS;
kvmppc_set_gpr(vcpu, 1, (16<<20) - 8); /* -8 for the callee-save LR slot */
vcpu->arch.shadow_pid = 1;