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authorMax Filippov <jcmvbkbc@gmail.com>2019-08-12 15:01:30 -0700
committerMax Filippov <jcmvbkbc@gmail.com>2019-08-12 15:05:48 -0700
commitcd8869f4cb257f22b89495ca40f5281e58ba359c (patch)
tree3b5759dd18c3adf1974e5ee191ed42f75b283673 /arch/xtensa/kernel
parentd45331b00ddb179e291766617259261c112db872 (diff)
downloadlinux-cd8869f4cb257f22b89495ca40f5281e58ba359c.tar.bz2
xtensa: add missing isync to the cpu_reset TLB code
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>
Diffstat (limited to 'arch/xtensa/kernel')
-rw-r--r--arch/xtensa/kernel/setup.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/xtensa/kernel/setup.c b/arch/xtensa/kernel/setup.c
index 5cb8a62e091c..7c3106093c75 100644
--- a/arch/xtensa/kernel/setup.c
+++ b/arch/xtensa/kernel/setup.c
@@ -511,6 +511,7 @@ 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"