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arm64: mte: remove an ISB on kernel exit

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This ISB is unnecessary because we will soon do an ERET.

Signed-off-by: Peter Collingbourne <pcc@google.com>
Link: https://linux-review.googlesource.com/id/I69f1ee6bb09b1372dd744a0e01cedaf090c8d448
Link: https://lore.kernel.org/r/20201203073458.2675400-1-pcc@google.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Peter Collingbourne 2020-12-02 23:34:58 -08:00 • committed by Catalin Marinas
parent 42e85f9017
commit b614231dec
1 changed files with 1 additions and 1 deletions
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2
arch/arm64/kernel/entry.S
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@ -182,7 +182,6 @@ alternative_else_nop_endif
mrs_s \tmp2, SYS_GCR_EL1 mrs_s \tmp2, SYS_GCR_EL1
bfi \tmp2, \tmp, #0, #16 bfi \tmp2, \tmp, #0, #16
msr_s SYS_GCR_EL1, \tmp2 msr_s SYS_GCR_EL1, \tmp2
isb
#endif #endif
.endm .endm
@ -194,6 +193,7 @@ alternative_else_nop_endif
ldr_l \tmp, gcr_kernel_excl ldr_l \tmp, gcr_kernel_excl
mte_set_gcr \tmp, \tmp2 mte_set_gcr \tmp, \tmp2
isb
1: 1:
#endif #endif
.endm .endm