diff options
Diffstat (limited to 'arch/powerpc/kvm/book3s_interrupts.S')
| -rw-r--r-- | arch/powerpc/kvm/book3s_interrupts.S | 50 |
1 files changed, 38 insertions, 12 deletions
diff --git a/arch/powerpc/kvm/book3s_interrupts.S b/arch/powerpc/kvm/book3s_interrupts.S index f4dd041c14e..d044b8b7c69 100644 --- a/arch/powerpc/kvm/book3s_interrupts.S +++ b/arch/powerpc/kvm/book3s_interrupts.S @@ -25,7 +25,11 @@ #include <asm/exception-64s.h> #if defined(CONFIG_PPC_BOOK3S_64) +#if defined(_CALL_ELF) && _CALL_ELF == 2 +#define FUNC(name) name +#else #define FUNC(name) GLUE(.,name) +#endif #define GET_SHADOW_VCPU(reg) addi reg, r13, PACA_SVCPU #elif defined(CONFIG_PPC_BOOK3S_32) @@ -104,8 +108,27 @@ kvm_start_lightweight: stb r3, HSTATE_RESTORE_HID5(r13) /* Load up guest SPRG3 value, since it's user readable */ - ld r3, VCPU_SHARED(r4) - ld r3, VCPU_SHARED_SPRG3(r3) + lwz r3, VCPU_SHAREDBE(r4) + cmpwi r3, 0 + ld r5, VCPU_SHARED(r4) + beq sprg3_little_endian +sprg3_big_endian: +#ifdef __BIG_ENDIAN__ + ld r3, VCPU_SHARED_SPRG3(r5) +#else + addi r5, r5, VCPU_SHARED_SPRG3 + ldbrx r3, 0, r5 +#endif + b after_sprg3_load +sprg3_little_endian: +#ifdef __LITTLE_ENDIAN__ + ld r3, VCPU_SHARED_SPRG3(r5) +#else + addi r5, r5, VCPU_SHARED_SPRG3 + ldbrx r3, 0, r5 +#endif + +after_sprg3_load: mtspr SPRN_SPRG3, r3 #endif /* CONFIG_PPC_BOOK3S_64 */ @@ -129,29 +152,32 @@ 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 - + ld r3, PACA_SPRG_VDSO(r13) + mtspr SPRN_SPRG_VDSO_WRITE, r3 #endif /* CONFIG_PPC_BOOK3S_64 */ /* R7 = vcpu */ @@ -177,7 +203,7 @@ 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) |