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authorNathan Fontenot <nfont@linux.vnet.ibm.com>2013-04-24 06:07:39 +0000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2013-04-26 16:08:26 +1000
commite04fa61214a3e586282490af7e1b023522c1472a (patch)
tree44efd1187b1b9d77341cec4b80c4355a36a73afb /arch/powerpc/kernel/rtasd.c
parent1b1218d32efdc81134eeb908935a18659cb3d9d7 (diff)
powerpc/pseries: Add /proc interface to control topology updates
There are instances in which we do not want topology updates to occur. In order to allow this a /proc interface (/proc/powerpc/topology_updates) is introduced so that topology updates can be enabled and disabled. This patch also adds a prrn_is_enabled() call so that PRRN events are handled in the kernel only if topology updating is enabled. Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/kernel/rtasd.c')
-rw-r--r--arch/powerpc/kernel/rtasd.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/powerpc/kernel/rtasd.c b/arch/powerpc/kernel/rtasd.c
index 8e52b6d8b6f2..1130c53ad652 100644
--- a/arch/powerpc/kernel/rtasd.c
+++ b/arch/powerpc/kernel/rtasd.c
@@ -29,6 +29,7 @@
#include <asm/nvram.h>
#include <linux/atomic.h>
#include <asm/machdep.h>
+#include <asm/topology.h>
static DEFINE_SPINLOCK(rtasd_log_lock);
@@ -292,11 +293,13 @@ void prrn_schedule_update(u32 scope)
static void handle_rtas_event(const struct rtas_error_log *log)
{
- if (log->type == RTAS_TYPE_PRRN)
+ if (log->type == RTAS_TYPE_PRRN) {
/* For PRRN Events the extended log length is used to denote
* the scope for calling rtas update-nodes.
*/
- prrn_schedule_update(log->extended_log_length);
+ if (prrn_is_enabled())
+ prrn_schedule_update(log->extended_log_length);
+ }
return;
}