diff options
Diffstat (limited to 'arch/powerpc/kvm/booke_interrupts.S')
| -rw-r--r-- | arch/powerpc/kvm/booke_interrupts.S | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/arch/powerpc/kvm/booke_interrupts.S b/arch/powerpc/kvm/booke_interrupts.S index 42f2fb1f66e9..10d8ef602e5c 100644 --- a/arch/powerpc/kvm/booke_interrupts.S +++ b/arch/powerpc/kvm/booke_interrupts.S @@ -402,19 +402,25 @@ lightweight_exit: /* Save vcpu pointer for the exception handlers. */ mtspr SPRN_SPRG_WVCPU, r4 + lwz r5, VCPU_SHARED(r4) + /* Can't switch the stack pointer until after IVPR is switched, * because host interrupt handlers would get confused. */ lwz r1, VCPU_GPR(r1)(r4) - /* Host interrupt handlers may have clobbered these guest-readable - * SPRGs, so we need to reload them here with the guest's values. */ - lwz r3, VCPU_SPRG4(r4) + /* + * Host interrupt handlers may have clobbered these + * guest-readable SPRGs, or the guest kernel may have + * written directly to the shared area, so we + * need to reload them here with the guest's values. + */ + lwz r3, VCPU_SHARED_SPRG4(r5) mtspr SPRN_SPRG4W, r3 - lwz r3, VCPU_SPRG5(r4) + lwz r3, VCPU_SHARED_SPRG5(r5) mtspr SPRN_SPRG5W, r3 - lwz r3, VCPU_SPRG6(r4) + lwz r3, VCPU_SHARED_SPRG6(r5) mtspr SPRN_SPRG6W, r3 - lwz r3, VCPU_SPRG7(r4) + lwz r3, VCPU_SHARED_SPRG7(r5) mtspr SPRN_SPRG7W, r3 #ifdef CONFIG_KVM_EXIT_TIMING |