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| author | Max Filippov <jcmvbkbc@gmail.com> | 2019-08-13 01:01:30 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-08-25 11:50:04 +0300 |
| commit | d2e9581f18c4cbc63fd0da670b532136bb27f8d3 (patch) | |
| tree | 7203ddb087962dba09d49aa55d926f28e39f05a1 /arch/xtensa | |
| parent | 4bcb4a1b81f55f8391b7c5e57a5b540af749fe2c (diff) | |
| download | linux-d2e9581f18c4cbc63fd0da670b532136bb27f8d3.tar.xz | |
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>
Diffstat (limited to 'arch/xtensa')
| -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 66eefe1919a4..92fb20777bb0 100644 --- a/arch/xtensa/kernel/setup.c +++ b/arch/xtensa/kernel/setup.c @@ -508,6 +508,7 @@ 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" |