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MIPS: CPS: Set Status.KX on entry for MIPS64 kernels

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If the kernel may make use of 64 bit addresses outside of the
compatibility address space then we need to set KX such that those
accesses can succeed. Do so for MIPS64 kernels.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: Markos Chandras <markos.chandras@imgtec.com>
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/11201/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Paul Burton 2015-09-22 11:12:10 -07:00 committed by Ralf Baechle
parent b85ff24453
commit 8fe2c5478b
1 changed files with 7 additions and 1 deletions
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8
arch/mips/kernel/cps-vec.S
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@ -25,6 +25,12 @@
.set noreorder
#ifdef CONFIG_64BIT
# define STATUS_BITDEPS ST0_KX
#else
# define STATUS_BITDEPS 0
#endif
/*
* Set dest to non-zero if the core supports the MT ASE, else zero. If
* MT is not supported then branch to nomt.
@ -71,7 +77,7 @@ not_nmi:
mtc0 t0, CP0_CAUSE
/* Setup Status */
li t0, ST0_CU1 | ST0_CU0 | ST0_BEV
li t0, ST0_CU1 | ST0_CU0 | ST0_BEV | STATUS_BITDEPS
mtc0 t0, CP0_STATUS
/*