Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit d6e41525 authored by David Daney's avatar David Daney Committed by Ralf Baechle
Browse files

MIPS: OCTEON: Fix FP context save. 



It wasn't being saved on task switch.

Signed-off-by: default avatarDavid Daney <david.daney@cavium.com>
Signed-off-by: default avatarAleksey Makarov <aleksey.makarov@auriga.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/8934/


Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent ac655fb7

arch/mips/kernel/octeon_switch.S

+7 −12
Original line number Diff line number Diff line
@@ -31,15 +31,11 @@ 
	/*

	 * check if we need to save FPU registers

	 */

	.set push

	.set noreorder

	beqz	a3, 1f

	 PTR_L	t3, TASK_THREAD_INFO(a0)

	LONG_L	t0, TI_FLAGS(t3)

	li	t1, _TIF_USEDFPU

	and	t2, t0, t1

	beqz	t2, 1f

	nor	t1, zero, t1



	and	t0, t0, t1

	LONG_S	t0, TI_FLAGS(t3)

	.set pop



	/*

	 * clear saved user stack CU1 bit
@@ -57,14 +53,13 @@ 
1:



	/* check if we need to save COP2 registers */

	PTR_L	t2, TASK_THREAD_INFO(a0)

	LONG_L	t0, ST_OFF(t2)

	LONG_L	t0, ST_OFF(t3)

	bbit0	t0, 30, 1f



	/* Disable COP2 in the stored process state */

	li	t1, ST0_CU2

	xor	t0, t1

	LONG_S	t0, ST_OFF(t2)

	LONG_S	t0, ST_OFF(t3)



	/* Enable COP2 so we can save it */

	mfc0	t0, CP0_STATUS