diff options
| author | Alexander Graf <agraf@suse.de> | 2011-12-09 14:44:13 +0100 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2012-03-05 14:52:30 +0200 |
| commit | 468a12c2b53776721ff83517d4a195b85c5fce54 (patch) | |
| tree | ba417210997c2e3119525641764303d97db32815 /arch/powerpc/include/asm/kvm_book3s_32.h | |
| parent | d33ad328c0025c45f4688a769aeebddc342222c1 (diff) | |
KVM: PPC: Use get/set for to_svcpu to help preemption
When running the 64-bit Book3s PR code without CONFIG_PREEMPT_NONE, we were
doing a few things wrong, most notably access to PACA fields without making
sure that the pointers stay stable accross the access (preempt_disable()).
This patch moves to_svcpu towards a get/put model which allows us to disable
preemption while accessing the shadow vcpu fields in the PACA. That way we
can run preemptible and everyone's happy!
Reported-by: Jörg Sommer <joerg@alea.gnuu.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/powerpc/include/asm/kvm_book3s_32.h')
| -rw-r--r-- | arch/powerpc/include/asm/kvm_book3s_32.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/kvm_book3s_32.h b/arch/powerpc/include/asm/kvm_book3s_32.h index de604db135f5..38040ff82063 100644 --- a/arch/powerpc/include/asm/kvm_book3s_32.h +++ b/arch/powerpc/include/asm/kvm_book3s_32.h @@ -20,11 +20,15 @@ #ifndef __ASM_KVM_BOOK3S_32_H__ #define __ASM_KVM_BOOK3S_32_H__ -static inline struct kvmppc_book3s_shadow_vcpu *to_svcpu(struct kvm_vcpu *vcpu) +static inline struct kvmppc_book3s_shadow_vcpu *svcpu_get(struct kvm_vcpu *vcpu) { return to_book3s(vcpu)->shadow_vcpu; } +static inline void svcpu_put(struct kvmppc_book3s_shadow_vcpu *svcpu) +{ +} + #define PTE_SIZE 12 #define VSID_ALL 0 #define SR_INVALID 0x00000001 /* VSID 1 should always be unused */ |