linux-kernel - [PATCH 3/4] ARCv2: smp: MCIP: remove debug aid to halt all cores when one halts

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Date:   Mon, 16 Jan 2017 12:57:56 -0800
From:   Vineet Gupta <Vineet.Gupta1@...opsys.com>
To:     <linux-snps-arc@...ts.infradead.org>, <Alexey.Brodkin@...opsys.com>
CC:     <linux-kernel@...r.kernel.org>,
        Vineet Gupta <Vineet.Gupta1@...opsys.com>
Subject: [PATCH 3/4] ARCv2: smp: MCIP: remove debug aid to halt all cores when one halts

This was really usefull when doing initial bringup and also for
occassional debug of software and hardware bugs. However in the new
smp-boot regime, non masters will "self" halt even for run-on-reset
configs. This will misinteract with the debug feature as in even master
will get halted when the non masters self halt.

Signed-off-by: Vineet Gupta <vgupta@...opsys.com>
---
 arch/arc/kernel/mcip.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/arch/arc/kernel/mcip.c b/arch/arc/kernel/mcip.c
index f39142acc89e..933382e0edd0 100644
--- a/arch/arc/kernel/mcip.c
+++ b/arch/arc/kernel/mcip.c
@@ -101,11 +101,6 @@ static void mcip_probe_n_setup(void)
 		IS_AVAIL1(mp.gfrc, "GFRC"));
 
 	cpuinfo_arc700[0].extn.gfrc = mp.gfrc;
-
-	if (mp.dbg) {
-		__mcip_cmd_data(CMD_DEBUG_SET_SELECT, 0, 0xf);
-		__mcip_cmd_data(CMD_DEBUG_SET_MASK, 0xf, 0xf);
-	}
 }
 
 struct plat_smp_ops plat_smp_ops = {
-- 
2.7.4