summaryrefslogtreecommitdiffstats
path: root/arch/powerpc/platforms/pseries/smp.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/powerpc/platforms/pseries/smp.c')
-rw-r--r--arch/powerpc/platforms/pseries/smp.c42
1 files changed, 36 insertions, 6 deletions
diff --git a/arch/powerpc/platforms/pseries/smp.c b/arch/powerpc/platforms/pseries/smp.c
index 4e7f89a8456..3b1bf61c45b 100644
--- a/arch/powerpc/platforms/pseries/smp.c
+++ b/arch/powerpc/platforms/pseries/smp.c
@@ -55,7 +55,29 @@
* The Primary thread of each non-boot processor was started from the OF client
* interface by prom_hold_cpus and is spinning on secondary_hold_spinloop.
*/
-static cpumask_t of_spin_map;
+static cpumask_var_t of_spin_mask;
+
+/* Query where a cpu is now. Return codes #defined in plpar_wrappers.h */
+int smp_query_cpu_stopped(unsigned int pcpu)
+{
+ int cpu_status, status;
+ int qcss_tok = rtas_token("query-cpu-stopped-state");
+
+ if (qcss_tok == RTAS_UNKNOWN_SERVICE) {
+ printk(KERN_INFO "Firmware doesn't support "
+ "query-cpu-stopped-state\n");
+ return QCSS_HARDWARE_ERROR;
+ }
+
+ status = rtas_call(qcss_tok, 1, 2, &cpu_status, pcpu);
+ if (status != 0) {
+ printk(KERN_ERR
+ "RTAS query-cpu-stopped-state failed: %i\n", status);
+ return status;
+ }
+
+ return cpu_status;
+}
/**
* smp_startup_cpu() - start the given cpu
@@ -76,12 +98,18 @@ static inline int __devinit smp_startup_cpu(unsigned int lcpu)
unsigned int pcpu;
int start_cpu;
- if (cpu_isset(lcpu, of_spin_map))
+ if (cpumask_test_cpu(lcpu, of_spin_mask))
/* Already started by OF and sitting in spin loop */
return 1;
pcpu = get_hard_smp_processor_id(lcpu);
+ /* Check to see if the CPU out of FW already for kexec */
+ if (smp_query_cpu_stopped(pcpu) == QCSS_NOT_STOPPED){
+ cpumask_set_cpu(lcpu, of_spin_mask);
+ return 1;
+ }
+
/* Fixup atomic count: it exited inside IRQ handler. */
task_thread_info(paca[lcpu].__current)->preempt_count = 0;
@@ -115,7 +143,7 @@ static void __devinit smp_xics_setup_cpu(int cpu)
if (firmware_has_feature(FW_FEATURE_SPLPAR))
vpa_init(cpu);
- cpu_clear(cpu, of_spin_map);
+ cpumask_clear_cpu(cpu, of_spin_mask);
set_cpu_current_state(cpu, CPU_STATE_ONLINE);
set_default_offline_state(cpu);
@@ -186,17 +214,19 @@ static void __init smp_init_pseries(void)
pr_debug(" -> smp_init_pSeries()\n");
+ alloc_bootmem_cpumask_var(&of_spin_mask);
+
/* Mark threads which are still spinning in hold loops. */
if (cpu_has_feature(CPU_FTR_SMT)) {
for_each_present_cpu(i) {
if (cpu_thread_in_core(i) == 0)
- cpu_set(i, of_spin_map);
+ cpumask_set_cpu(i, of_spin_mask);
}
} else {
- of_spin_map = cpu_present_map;
+ cpumask_copy(of_spin_mask, cpu_present_mask);
}
- cpu_clear(boot_cpuid, of_spin_map);
+ cpumask_clear_cpu(boot_cpuid, of_spin_mask);
/* Non-lpar has additional take/give timebase */
if (rtas_token("freeze-time-base") != RTAS_UNKNOWN_SERVICE) {