diff options
Diffstat (limited to 'hw/ppc/spapr_rtas.c')
| -rw-r--r-- | hw/ppc/spapr_rtas.c | 21 |
1 files changed, 11 insertions, 10 deletions
diff --git a/hw/ppc/spapr_rtas.c b/hw/ppc/spapr_rtas.c index cdf0b607a0..4bb939d3d1 100644 --- a/hw/ppc/spapr_rtas.c +++ b/hw/ppc/spapr_rtas.c @@ -162,6 +162,7 @@ static void rtas_start_cpu(PowerPCCPU *cpu_, sPAPRMachineState *spapr, if (cpu != NULL) { CPUState *cs = CPU(cpu); CPUPPCState *env = &cpu->env; + PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu); if (!cs->halted) { rtas_st(rets, 0, RTAS_OUT_HW_ERROR); @@ -174,6 +175,10 @@ static void rtas_start_cpu(PowerPCCPU *cpu_, sPAPRMachineState *spapr, kvm_cpu_synchronize_state(cs); env->msr = (1ULL << MSR_SF) | (1ULL << MSR_ME); + + /* Enable Power-saving mode Exit Cause exceptions for the new CPU */ + env->spr[SPR_LPCR] |= pcc->lpcr_pm; + env->nip = start; env->gpr[3] = r3; cs->halted = 0; @@ -197,19 +202,15 @@ static void rtas_stop_self(PowerPCCPU *cpu, sPAPRMachineState *spapr, { CPUState *cs = CPU(cpu); CPUPPCState *env = &cpu->env; + PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu); cs->halted = 1; qemu_cpu_kick(cs); - /* - * While stopping a CPU, the guest calls H_CPPR which - * effectively disables interrupts on XICS level. - * However decrementer interrupts in TCG can still - * wake the CPU up so here we disable interrupts in MSR - * as well. - * As rtas_start_cpu() resets the whole MSR anyway, there is - * no need to bother with specific bits, we just clear it. - */ - env->msr = 0; + + /* Disable Power-saving mode Exit Cause exceptions for the CPU. + * This could deliver an interrupt on a dying CPU and crash the + * guest */ + env->spr[SPR_LPCR] &= ~pcc->lpcr_pm; } static inline int sysparm_st(target_ulong addr, target_ulong len, |