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-rw-r--r--arch/powerpc/kvm/book3s_interrupts.S19
1 files changed, 11 insertions, 8 deletions
diff --git a/arch/powerpc/kvm/book3s_interrupts.S b/arch/powerpc/kvm/book3s_interrupts.S
index f4dd041c14ea..f779450cb07c 100644
--- a/arch/powerpc/kvm/book3s_interrupts.S
+++ b/arch/powerpc/kvm/book3s_interrupts.S
@@ -129,29 +129,32 @@ kvm_start_lightweight:
* R12 = exit handler id
* R13 = PACA
* SVCPU.* = guest *
+ * MSR.EE = 1
*
*/
+ PPC_LL r3, GPR4(r1) /* vcpu pointer */
+
+ /*
+ * kvmppc_copy_from_svcpu can clobber volatile registers, save
+ * the exit handler id to the vcpu and restore it from there later.
+ */
+ stw r12, VCPU_TRAP(r3)
+
/* Transfer reg values from shadow vcpu back to vcpu struct */
/* On 64-bit, interrupts are still off at this point */
- PPC_LL r3, GPR4(r1) /* vcpu pointer */
+
GET_SHADOW_VCPU(r4)
bl FUNC(kvmppc_copy_from_svcpu)
nop
#ifdef CONFIG_PPC_BOOK3S_64
- /* Re-enable interrupts */
- ld r3, HSTATE_HOST_MSR(r13)
- ori r3, r3, MSR_EE
- MTMSR_EERI(r3)
-
/*
* Reload kernel SPRG3 value.
* No need to save guest value as usermode can't modify SPRG3.
*/
ld r3, PACA_SPRG3(r13)
mtspr SPRN_SPRG3, r3
-
#endif /* CONFIG_PPC_BOOK3S_64 */
/* R7 = vcpu */
@@ -177,7 +180,7 @@ kvm_start_lightweight:
PPC_STL r31, VCPU_GPR(R31)(r7)
/* Pass the exit number as 3rd argument to kvmppc_handle_exit */
- mr r5, r12
+ lwz r5, VCPU_TRAP(r7)
/* Restore r3 (kvm_run) and r4 (vcpu) */
REST_2GPRS(3, r1)