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| author | Max Filippov <jcmvbkbc@gmail.com> | 2019-08-12 15:01:30 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-08-25 10:51:43 +0200 |
| commit | c6a46c615274da0cfb4090140ceea0427ae13e22 (patch) | |
| tree | 0b31dbde2ec92f65f314c55c479eb61edf38f341 | |
| parent | 1922476beeeea46bebbe577215078736dd4231dc (diff) | |
| download | linux-stable-c6a46c615274da0cfb4090140ceea0427ae13e22.tar.gz linux-stable-c6a46c615274da0cfb4090140ceea0427ae13e22.tar.bz2 linux-stable-c6a46c615274da0cfb4090140ceea0427ae13e22.zip | |
xtensa: add missing isync to the cpu_reset TLB code
commit cd8869f4cb257f22b89495ca40f5281e58ba359c upstream.
ITLB entry modifications must be followed by the isync instruction
before the new entries are possibly used. cpu_reset lacks one isync
between ITLB way 6 initialization and jump to the identity mapping.
Add missing isync to xtensa cpu_reset.
Cc: stable@vger.kernel.org
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | arch/xtensa/kernel/setup.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/xtensa/kernel/setup.c b/arch/xtensa/kernel/setup.c index a45d32abea26..b9beae798d72 100644 --- a/arch/xtensa/kernel/setup.c +++ b/arch/xtensa/kernel/setup.c @@ -626,6 +626,7 @@ void cpu_reset(void) "add %2, %2, %7\n\t" "addi %0, %0, -1\n\t" "bnez %0, 1b\n\t" + "isync\n\t" /* Jump to identity mapping */ "jx %3\n" "2:\n\t" |