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authorMichael Neuling <mikey@neuling.org>2008-01-11 14:02:47 +1100
committerPaul Mackerras <paulus@samba.org>2008-01-11 16:33:55 +1100
commit473980a99316c0e788bca50996375a2815124ce1 (patch)
tree5fb9d5de6ee75299b32de0e0b66f5a868864c38f /arch/powerpc/platforms/pseries/hotplug-cpu.c
parent6f4347c969674ed45de7d08d4b26d6326a95b959 (diff)
downloadlinaro-lsk-473980a99316c0e788bca50996375a2815124ce1.tar.gz
[POWERPC] Fix CPU hotplug when using the SLB shadow buffer
Before we register the SLB shadow buffer, we need to invalidate the entries in the buffer, otherwise we can end up stale entries from when we previously offlined the CPU. This does this invalidate as well as unregistering the buffer with PHYP before we offline the cpu. Tested and fixes crashes seen on 970MP (thanks to tonyb) and POWER5. Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/platforms/pseries/hotplug-cpu.c')
-rw-r--r--arch/powerpc/platforms/pseries/hotplug-cpu.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/pseries/hotplug-cpu.c b/arch/powerpc/platforms/pseries/hotplug-cpu.c
index fc48b96c81b..412e6b42986 100644
--- a/arch/powerpc/platforms/pseries/hotplug-cpu.c
+++ b/arch/powerpc/platforms/pseries/hotplug-cpu.c
@@ -29,6 +29,7 @@
#include <asm/vdso_datapage.h>
#include <asm/pSeries_reconfig.h>
#include "xics.h"
+#include "plpar_wrappers.h"
/* This version can't take the spinlock, because it never returns */
static struct rtas_args rtas_stop_self_args = {
@@ -58,6 +59,7 @@ static void pseries_mach_cpu_die(void)
local_irq_disable();
idle_task_exit();
xics_teardown_cpu(0);
+ unregister_slb_shadow(hard_smp_processor_id(), __pa(get_slb_shadow()));
rtas_stop_self();
/* Should never get here... */
BUG();