Max Filippov 19f6dcb1f0 xtensa: fix a7 clobbering in coprocessor context load/store ...

commit 839769c354 upstream.

Fast coprocessor exception handler saves a3..a6, but coprocessor context
load/store code uses a4..a7 as temporaries, potentially clobbering a7.
'Potentially' because coprocessor state load/store macros may not use
all four temporary registers (and neither FPU nor HiFi macros do).
Use a3..a6 as intended.

Cc: stable@vger.kernel.org
Fixes: c658eac628 ("[XTENSA] Add support for configurable registers and coprocessors")
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2022-04-27 13:53:55 +02:00

..

boot

xtensa: fix DTC warning unit_address_format

2022-04-13 21:01:00 +02:00

configs

xtensa: reorganize vectors placement

2020-02-04 21:57:02 -08:00

include

xtensa: fix xtensa_wsr always writing 0

2022-04-08 14:39:58 +02:00

kernel

xtensa: fix a7 clobbering in coprocessor context load/store

2022-04-27 13:53:55 +02:00

lib

xtensa: propagate the calling conventions change down into csum_partial_copy_generic()

2020-08-20 15:45:21 -04:00

mm

xtensa: use CONFIG_USE_OF instead of CONFIG_OF

2021-10-13 10:04:26 +02:00

oprofile

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

platforms

xtensa: xtfpga: Try software restart before simulating CPU reset

2021-10-27 09:56:47 +02:00

variants

xtensa: add test_kc705_be variant

2018-08-20 12:34:45 -07:00

Kconfig

xtensa: fix kconfig unmet dependency warning for HAVE_FUTEX_CMPXCHG

2021-09-08 08:49:00 +02:00

Kconfig.debug

xtensa: make stack dump size configurable

2019-11-26 11:33:39 -08:00

Makefile

xtensa: add XIP kernel support

2019-11-26 11:33:38 -08:00