linux-kernel - [PATCH 06/10] microblaze: Add sync to tlb operations

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Message-Id: <c3d70f467907944e2680678f8aacb6d04def3f20.1581497860.git.michal.simek@xilinx.com>
Date:   Wed, 12 Feb 2020 09:58:03 +0100
From:   Michal Simek <michal.simek@...inx.com>
To:     linux-kernel@...r.kernel.org, monstr@...str.eu,
        michal.simek@...inx.com, git@...inx.com, arnd@...db.de
Cc:     Stefan Asserhall <stefan.asserhall@...inx.com>
Subject: [PATCH 06/10] microblaze: Add sync to tlb operations

From: Stefan Asserhall <stefan.asserhall@...inx.com>

Do the real sync by using mbar instruction.

Signed-off-by: Stefan Asserhall <stefan.asserhall@...inx.com>
Signed-off-by: Michal Simek <michal.simek@...inx.com>
---

 arch/microblaze/kernel/misc.S | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/microblaze/kernel/misc.S b/arch/microblaze/kernel/misc.S
index 6759af688451..1228a09d8109 100644
--- a/arch/microblaze/kernel/misc.S
+++ b/arch/microblaze/kernel/misc.S
@@ -39,7 +39,7 @@ _tlbia_1:
 	rsubi	r11, r12, MICROBLAZE_TLB_SIZE - 1
 	bneid	r11, _tlbia_1 /* loop for all entries */
 	addik	r12, r12, 1
-	/* sync */
+	mbar	1 /* sync */
 	rtsd	r15, 8
 	nop
 	.size  _tlbia, . - _tlbia
@@ -58,6 +58,7 @@ _tlbie:
 	blti	r12, _tlbie_1 /* Check if found */
 	mts	rtlbhi, r0 /* flush: ensure V is clear */
 	nop
+	mbar	1 /* sync */
 _tlbie_1:
 	rtsd	r15, 8
 	nop
-- 
2.25.0