We have wrappers to do for example gpr read/write accesses with,
because the contents of registers could be either in the PACA
or in the VCPU struct.
There's nothing that says we have to have the guest vcpu loaded
when using these wrappers though, so let's introduce a flag that
tells us whether we're inside a vcpu_load context.
Signed-off-by: Alexander Graf <agraf@xxxxxxx>
---
arch/powerpc/include/asm/kvm_book3s.h | 1 +
arch/powerpc/include/asm/kvm_ppc.h | 19 ++++++++++++++-----
arch/powerpc/kvm/book3s.c | 2 ++
3 files changed, 17 insertions(+), 5 deletions(-)
diff --git a/arch/powerpc/include/asm/kvm_book3s.h b/arch/powerpc/include/asm/kvm_book3s.h
index e6ea974..3c7b335 100644
--- a/arch/powerpc/include/asm/kvm_book3s.h
+++ b/arch/powerpc/include/asm/kvm_book3s.h
@@ -78,6 +78,7 @@ struct kvmppc_vcpu_book3s {
u64 vsid;
} slb_shadow[64];
u8 slb_shadow_max;
+ u8 shadow_vcpu_paca;
struct kvmppc_sr sr[16];
struct kvmppc_bat ibat[8];
struct kvmppc_bat dbat[8];
diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h
index c7fcdd7..c3912e9 100644
--- a/arch/powerpc/include/asm/kvm_ppc.h
+++ b/arch/powerpc/include/asm/kvm_ppc.h
@@ -151,9 +151,12 @@ static inline void kvmppc_set_gpr(struct kvm_vcpu *vcpu, int num, ulong val)
static inline ulong kvmppc_get_gpr(struct kvm_vcpu *vcpu, int num)
{
- if ( num < 14 )
- return get_paca()->shadow_vcpu.gpr[num];
- else
+ if ( num < 14 ) {
+ if (to_book3s(vcpu)->shadow_vcpu_paca)
+ return get_paca()->shadow_vcpu.gpr[num];
+ else
+ return to_book3s(vcpu)->shadow_vcpu.gpr[num];
+ } else
return vcpu->arch.gpr[num];
}
@@ -165,7 +168,10 @@ static inline void kvmppc_set_cr(struct kvm_vcpu *vcpu, u32 val)
static inline u32 kvmppc_get_cr(struct kvm_vcpu *vcpu)
{
- return get_paca()->shadow_vcpu.cr;
+ if (to_book3s(vcpu)->shadow_vcpu_paca)
+ return get_paca()->shadow_vcpu.cr;
+ else
+ return to_book3s(vcpu)->shadow_vcpu.cr;
}
static inline void kvmppc_set_xer(struct kvm_vcpu *vcpu, u32 val)
@@ -176,7 +182,10 @@ static inline void kvmppc_set_xer(struct kvm_vcpu *vcpu, u32 val)
static inline u32 kvmppc_get_xer(struct kvm_vcpu *vcpu)
{
- return get_paca()->shadow_vcpu.xer;
+ if (to_book3s(vcpu)->shadow_vcpu_paca)
+ return get_paca()->shadow_vcpu.xer;
+ else
+ return to_book3s(vcpu)->shadow_vcpu.xer;
}
#else
diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c
index 94c229d..8a04ec6 100644
--- a/arch/powerpc/kvm/book3s.c
+++ b/arch/powerpc/kvm/book3s.c
@@ -73,10 +73,12 @@ void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
memcpy(&get_paca()->shadow_vcpu, &to_book3s(vcpu)->shadow_vcpu,
sizeof(get_paca()->shadow_vcpu));
get_paca()->kvm_slb_max = to_book3s(vcpu)->slb_shadow_max;
+ to_book3s(vcpu)->shadow_vcpu_paca = true;
}
void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
{
+ to_book3s(vcpu)->shadow_vcpu_paca = false;
memcpy(to_book3s(vcpu)->slb_shadow, get_paca()->kvm_slb, sizeof(get_paca()->kvm_slb));
memcpy(&to_book3s(vcpu)->shadow_vcpu, &get_paca()->shadow_vcpu,
sizeof(get_paca()->shadow_vcpu));
--
1.6.0.2
--
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