Author: jhibbits
Date: Mon Jun 8 02:28:00 2020
New Revision: 361901
URL: https://svnweb.freebsd.org/changeset/base/361901
Log:
powerpc/powernv: Don't configure disabled CPUs
If the POWER firmware detects a bad CPU core, it will "GUARD" it out,
marking it disabled. Any attempt to spin up a bad CPU will trigger a panic
later on when waiting for threads on said core to wake up. Support limping
along on fewer cores instead.
Modified:
head/sys/powerpc/powernv/platform_powernv.c
Modified: head/sys/powerpc/powernv/platform_powernv.c
==============================================================================
--- head/sys/powerpc/powernv/platform_powernv.c Mon Jun 8 00:46:19 2020
(r361900)
+++ head/sys/powerpc/powernv/platform_powernv.c Mon Jun 8 02:28:00 2020
(r361901)
@@ -49,6 +49,8 @@ __FBSDID("$FreeBSD$");
#include <machine/trap.h>
#include <dev/ofw/openfirm.h>
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
#include <machine/ofw_machdep.h>
#include <powerpc/aim/mmu_oea64.h>
@@ -332,6 +334,8 @@ powernv_cpuref_init(void)
for (cpu = OF_child(dev); cpu != 0; cpu = OF_peer(cpu)) {
res = OF_getprop(cpu, "device_type", buf, sizeof(buf));
if (res > 0 && strcmp(buf, "cpu") == 0) {
+ if (!ofw_bus_node_status_okay(cpu))
+ continue;
res = OF_getproplen(cpu, "ibm,ppc-interrupt-server#s");
if (res > 0) {
OF_getencprop(cpu, "ibm,ppc-interrupt-server#s",
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