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PowerNV: correctly start secondary CPUs

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Fix AP startup, which was broken.

Created by:            Nathan Whitehorn <nwhitehorn@freebsd.org>
Submitted by:          Wojciech Macek <wma@freebsd.org>
Sponsored by:          FreeBSD Foundation
This commit is contained in:
wma 2018-01-11 09:34:33 +00:00
parent 999af6c5ea
commit 2c77116bf2
1 changed files with 12 additions and 9 deletions
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21
sys/powerpc/powernv/platform_powernv.c
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@ -71,6 +71,7 @@ static int powernv_smp_start_cpu(platform_t, struct pcpu *cpu);
static struct cpu_group *powernv_smp_topo(platform_t plat);
#endif
static void powernv_reset(platform_t);
static void powernv_cpu_idle(sbintime_t sbt);
static platform_method_t powernv_methods[] = {
PLATFORMMETHOD(platform_probe, powernv_probe),
@ -115,6 +116,8 @@ powernv_attach(platform_t plat)
/* Ping OPAL again just to make sure */
opal_check();
cpu_idle_hook = powernv_cpu_idle;
return (0);
}
@ -270,23 +273,19 @@ powernv_smp_get_bsp(platform_t plat, struct cpuref *cpuref)
static int
powernv_smp_start_cpu(platform_t plat, struct pcpu *pc)
{
int result, err, timeout;
int result;
ap_pcpu = pc;
powerpc_sync();
result = opal_call(OPAL_START_CPU, pc->pc_cpuid, EXC_RST);
if (result < 0 || err != 0) {
printf("OPAL error (%d/%d): unable to start AP %d\n",
result, err, pc->pc_cpuid);
if (result != OPAL_SUCCESS) {
printf("OPAL error (%d): unable to start AP %d\n",
result, pc->pc_cpuid);
return (ENXIO);
}
timeout = 10000;
while (!pc->pc_awake && timeout--)
DELAY(100);
return ((pc->pc_awake) ? 0 : EBUSY);
return (0);
}
static struct cpu_group *
@ -333,3 +332,7 @@ powernv_smp_ap_init(platform_t platform)
{
}
static void
powernv_cpu_idle(sbintime_t sbt)
{
}