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authorScott Wood <scottwood@freescale.com>2011-06-14 18:34:31 -0500
committerAvi Kivity <avi@redhat.com>2011-07-12 13:16:32 +0300
commit4cd35f675ba41a99a477e28a6add4a66833325f2 (patch)
treed4b26dadccbad63b63ce90b358efa5903c4e075e /arch/powerpc/kvm/e500.c
parentecee273fc48f7f48f0c2f074335c43aaa790c308 (diff)
KVM: PPC: e500: Save/restore SPE state
This is done lazily. The SPE save will be done only if the guest has used SPE since the last preemption or heavyweight exit. Restore will be done only on demand, when enabling MSR_SPE in the shadow MSR, in response to an SPE fault or mtmsr emulation. For SPEFSCR, Linux already switches it on context switch (non-lazily), so the only remaining bit is to save it between qemu and the guest. Signed-off-by: Liu Yu <yu.liu@freescale.com> Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'arch/powerpc/kvm/e500.c')
-rw-r--r--arch/powerpc/kvm/e500.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/powerpc/kvm/e500.c b/arch/powerpc/kvm/e500.c
index 318dbc61ba44..797a7447c268 100644
--- a/arch/powerpc/kvm/e500.c
+++ b/arch/powerpc/kvm/e500.c
@@ -1,5 +1,5 @@
/*
- * Copyright (C) 2008 Freescale Semiconductor, Inc. All rights reserved.
+ * Copyright (C) 2008-2011 Freescale Semiconductor, Inc. All rights reserved.
*
* Author: Yu Liu, <yu.liu@freescale.com>
*
@@ -41,6 +41,11 @@ void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
{
kvmppc_e500_tlb_put(vcpu);
+
+#ifdef CONFIG_SPE
+ if (vcpu->arch.shadow_msr & MSR_SPE)
+ kvmppc_vcpu_disable_spe(vcpu);
+#endif
}
int kvmppc_core_check_processor_compat(void)

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