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ARC: [plat-eznps] disabled stall counter due to a HW bug

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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]
This commit is contained in:
Noam Camus 2017-05-28 09:52:04 +03:00 committed by Vineet Gupta
parent 30b7af252e
commit ab1e8660c1
1 changed files with 0 additions and 2 deletions
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2
arch/arc/plat-eznps/mtm.c
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@ -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);