diff options
Diffstat (limited to 'hw/ppc/spapr_rtas.c')
| -rw-r--r-- | hw/ppc/spapr_rtas.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/hw/ppc/spapr_rtas.c b/hw/ppc/spapr_rtas.c index 394ce05ba2..eb542f218a 100644 --- a/hw/ppc/spapr_rtas.c +++ b/hw/ppc/spapr_rtas.c @@ -202,6 +202,28 @@ static void rtas_start_cpu(PowerPCCPU *cpu_, sPAPREnvironment *spapr, rtas_st(rets, 0, -3); } +static void rtas_stop_self(PowerPCCPU *cpu, sPAPREnvironment *spapr, + uint32_t token, uint32_t nargs, + target_ulong args, + uint32_t nret, target_ulong rets) +{ + CPUState *cs = CPU(cpu); + CPUPPCState *env = &cpu->env; + + cs->halted = 1; + cpu_exit(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; +} + static struct rtas_call { const char *name; spapr_rtas_fn fn; @@ -322,6 +344,7 @@ static void core_rtas_register_types(void) spapr_rtas_register("query-cpu-stopped-state", rtas_query_cpu_stopped_state); spapr_rtas_register("start-cpu", rtas_start_cpu); + spapr_rtas_register("stop-self", rtas_stop_self); } type_init(core_rtas_register_types) |