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Index: head/sys/powerpc/powernv/platform_powernv.c
===================================================================
--- head/sys/powerpc/powernv/platform_powernv.c
+++ head/sys/powerpc/powernv/platform_powernv.c
@@ -425,9 +425,21 @@
static void
powernv_smp_ap_init(platform_t platform)
{
+ register_t msr;
+ /* LPID must not be altered when PSL_DR or PSL_IR is set */
+ msr = mfmsr();
+ mtmsr(msr & ~(PSL_DR | PSL_IR));
+
+ isync();
/* Direct interrupts to SRR instead of HSRR and reset LPCR otherwise */
+ mtspr(SPR_LPID, 0);
+ isync();
+
+ mtmsr(msr);
+
mtspr(SPR_LPCR, LPCR_LPES);
+ isync();
}
static void
Index: head/sys/powerpc/powerpc/mp_machdep.c
===================================================================
--- head/sys/powerpc/powerpc/mp_machdep.c
+++ head/sys/powerpc/powerpc/mp_machdep.c
@@ -94,6 +94,9 @@
printf("SMP: AP CPU #%d launched\n", PCPU_GET(cpuid));
mtx_unlock_spin(&ap_boot_mtx);
+ while(smp_started == 0)
+ ;
+
/* Start per-CPU event timers. */
cpu_initclocks_ap();
@@ -197,6 +200,7 @@
{
struct pcpu *pc;
int cpus, timeout;
+ int ret;
if (mp_ncpus <= 1)
return;
@@ -215,12 +219,12 @@
printf("Waking up CPU %d (dev=%x)\n",
pc->pc_cpuid, (int)pc->pc_hwref);
- platform_smp_start_cpu(pc);
-
- timeout = 2000; /* wait 2sec for the AP */
- while (!pc->pc_awake && --timeout > 0)
- DELAY(1000);
-
+ ret = platform_smp_start_cpu(pc);
+ if (ret == 0) {
+ timeout = 2000; /* wait 2sec for the AP */
+ while (!pc->pc_awake && --timeout > 0)
+ DELAY(1000);
+ }
} else {
pc->pc_awake = 1;
}
@@ -253,11 +257,12 @@
mp_ncpus, cpus, smp_cpus);
}
+ if (smp_cpus > 1)
+ atomic_store_rel_int(&smp_started, 1);
+
/* Let the APs get into the scheduler */
DELAY(10000);
- /* XXX Atomic set operation? */
- smp_started = 1;
}
SYSINIT(start_aps, SI_SUB_SMP, SI_ORDER_FIRST, cpu_mp_unleash, NULL);

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