svn commit: r327813 - head/sys/powerpc/powernv

[Wojciech Macek]

Author: wma
Date: Thu Jan 11 09:34:33 2018
New Revision: 327813
URL: https://svnweb.freebsd.org/changeset/base/327813

Log:
  PowerNV: correctly start secondary CPUs
  
  Fix AP startup, which was broken.
  
  Created by:            Nathan Whitehorn <nwhiteh...@freebsd.org>
  Submitted by:          Wojciech Macek <w...@freebsd.org>
  Sponsored by:          FreeBSD Foundation

Modified:
  head/sys/powerpc/powernv/platform_powernv.c

Modified: head/sys/powerpc/powernv/platform_powernv.c
==============================================================================
--- head/sys/powerpc/powernv/platform_powernv.c Thu Jan 11 09:26:28 2018        
(r327812)
+++ head/sys/powerpc/powernv/platform_powernv.c Thu Jan 11 09:34:33 2018        
(r327813)
@@ -71,6 +71,7 @@ static int powernv_smp_start_cpu(platform_t, struct pc
 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 *cp
 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)
+{
+}
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