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Diffstat (limited to 'arch/powerpc/platforms/pseries/smp.c')
-rw-r--r--arch/powerpc/platforms/pseries/smp.c49
1 files changed, 32 insertions, 17 deletions
diff --git a/arch/powerpc/platforms/pseries/smp.c b/arch/powerpc/platforms/pseries/smp.c
index f6f83aeccaaa..52ca6b311d44 100644
--- a/arch/powerpc/platforms/pseries/smp.c
+++ b/arch/powerpc/platforms/pseries/smp.c
@@ -55,11 +55,6 @@
*/
static cpumask_var_t of_spin_mask;
-/*
- * If we multiplex IPI mechanisms, store the appropriate XICS IPI mechanism here
- */
-static void (*xics_cause_ipi)(int cpu, unsigned long data);
-
/* Query where a cpu is now. Return codes #defined in plpar_wrappers.h */
int smp_query_cpu_stopped(unsigned int pcpu)
{
@@ -143,8 +138,6 @@ static void smp_setup_cpu(int cpu)
{
if (cpu != boot_cpuid)
xics_setup_cpu();
- if (cpu_has_feature(CPU_FTR_DBELL))
- doorbell_setup_this_cpu();
if (firmware_has_feature(FW_FEATURE_SPLPAR))
vpa_init(cpu);
@@ -187,28 +180,50 @@ static int smp_pSeries_kick_cpu(int nr)
return 0;
}
-/* Only used on systems that support multiple IPI mechanisms */
-static void pSeries_cause_ipi_mux(int cpu, unsigned long data)
+static void smp_pseries_cause_ipi(int cpu)
{
- if (cpumask_test_cpu(cpu, cpu_sibling_mask(smp_processor_id())))
- doorbell_cause_ipi(cpu, data);
- else
- xics_cause_ipi(cpu, data);
+ /* POWER9 should not use this handler */
+ if (doorbell_try_core_ipi(cpu))
+ return;
+
+ icp_ops->cause_ipi(cpu);
+}
+
+static int pseries_cause_nmi_ipi(int cpu)
+{
+ int hwcpu;
+
+ if (cpu == NMI_IPI_ALL_OTHERS) {
+ hwcpu = H_SIGNAL_SYS_RESET_ALL_OTHERS;
+ } else {
+ if (cpu < 0) {
+ WARN_ONCE(true, "incorrect cpu parameter %d", cpu);
+ return 0;
+ }
+
+ hwcpu = get_hard_smp_processor_id(cpu);
+ }
+
+ if (plapr_signal_sys_reset(hwcpu) == H_SUCCESS)
+ return 1;
+
+ return 0;
}
static __init void pSeries_smp_probe(void)
{
xics_smp_probe();
- if (cpu_has_feature(CPU_FTR_DBELL)) {
- xics_cause_ipi = smp_ops->cause_ipi;
- smp_ops->cause_ipi = pSeries_cause_ipi_mux;
- }
+ if (cpu_has_feature(CPU_FTR_DBELL))
+ smp_ops->cause_ipi = smp_pseries_cause_ipi;
+ else
+ smp_ops->cause_ipi = icp_ops->cause_ipi;
}
static struct smp_ops_t pseries_smp_ops = {
.message_pass = NULL, /* Use smp_muxed_ipi_message_pass */
.cause_ipi = NULL, /* Filled at runtime by pSeries_smp_probe() */
+ .cause_nmi_ipi = pseries_cause_nmi_ipi,
.probe = pSeries_smp_probe,
.kick_cpu = smp_pSeries_kick_cpu,
.setup_cpu = smp_setup_cpu,