gru: collect per-context user statistics

Collect GRU statistics for each user GRU context.  Statistics are kept for
TLB misses & content resource contention.  Add user request for retrieving
the statistics.

Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/misc/sgi-gru/grufile.c b/drivers/misc/sgi-gru/grufile.c
index e22012db239e..0d1c8b8c1c12 100644
--- a/drivers/misc/sgi-gru/grufile.c
+++ b/drivers/misc/sgi-gru/grufile.c
@@ -251,6 +251,9 @@ static long gru_file_unlocked_ioctl(struct file *file, unsigned int req,
         case GRU_USER_CALL_OS:
                 err = gru_handle_user_call_os(arg);
                 break;
+        case GRU_GET_GSEG_STATISTICS:
+                err = gru_get_gseg_statistics(arg);
+                break;
         case GRU_KTEST:
                 err = gru_ktest(arg);
                 break;