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authorNoam Camus <noamca@mellanox.com>2017-05-28 09:52:04 +0300
committerVineet Gupta <vgupta@synopsys.com>2017-08-28 15:17:36 -0700
commitab1e8660c1bb2aa6ca3fbbc7e97cc2a5ffe1599b (patch)
treee8a1ec354ca949fb23a6643df410f605899c0688 /arch/arc
parentARC: [plat-eznps] Fix TLB Errata (diff)
downloadlinux-dev-ab1e8660c1bb2aa6ca3fbbc7e97cc2a5ffe1599b.tar.xz
linux-dev-ab1e8660c1bb2aa6ca3fbbc7e97cc2a5ffe1599b.zip
ARC: [plat-eznps] disabled stall counter due to a HW bug
This counter represents threshold for consecutive stall which would trigger HW threads scheduling. However when enabled, low threshhold values cause performance degradation and in the worst case even livelock. So disable it by resorting to HW reset value Signed-off-by: Noam Camus <noamca@mellanox.com> Reviewed-by: Alexey Brodkin <abrodkin@synopsys.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com> [vgupta: fixed changelog]
Diffstat (limited to '')
-rw-r--r--arch/arc/plat-eznps/mtm.c2
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/arc/plat-eznps/mtm.c b/arch/arc/plat-eznps/mtm.c
index aaaaffd3d940..e0cb36b03d2e 100644
--- a/arch/arc/plat-eznps/mtm.c
+++ b/arch/arc/plat-eznps/mtm.c
@@ -119,8 +119,6 @@ void mtm_enable_core(unsigned int cpu)
mt_ctrl.value = 0;
mt_ctrl.hsen = 1;
mt_ctrl.hs_cnt = MT_CTRL_HS_CNT;
- mt_ctrl.sten = 1;
- mt_ctrl.st_cnt = MT_CTRL_ST_CNT;
mt_ctrl.mten = 1;
write_aux_reg(CTOP_AUX_MT_CTRL, mt_ctrl.value);