Messages in this thread Patch in this message | | | Date | Mon, 19 Jul 2010 16:32:26 -0500 | From | steiner@sgi ... | Subject | [Patch 08/25] GRU - flush gru tlb when driver is loaded |
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From: Jack Steiner <steiner@sgi.com>
Flush the GRU TLB when the GRU driver is loaded. There may be stale entries in the TLB if a previous GRU was unloaded since the system was last reset.
Signed-off-by: Jack Steiner <steiner@sgi.com>
--- drivers/misc/sgi-gru/grutlbpurge.c | 2 ++ 1 file changed, 2 insertions(+)
Index: linux/drivers/misc/sgi-gru/grutlbpurge.c =================================================================== --- linux.orig/drivers/misc/sgi-gru/grutlbpurge.c 2010-06-09 08:11:42.087537647 -0500 +++ linux/drivers/misc/sgi-gru/grutlbpurge.c 2010-06-09 08:11:42.891554573 -0500 @@ -380,4 +380,6 @@ void gru_tgh_flush_init(struct gru_state /* first starting TGH index to use for remote purges */ gru->gs_tgh_first_remote = (cpus + (1 << shift) - 1) >> shift; + /* flush the GRU TLB in case there are stale entries present */ + gru_flush_all_tlb(gru); }
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