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| author | Peter Collingbourne <pcc@google.com> | 2020-12-02 23:34:58 -0800 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2021-01-04 11:04:02 +0000 |
| commit | b614231dec7864a338ce85032aa3d2d7ea2bc46d (patch) | |
| tree | 3b1fc83ab9207a50a38cd78c815f81cfcc29a1f6 /arch | |
| parent | 42e85f90171a4ba59a1e1cedbbc30ce3f68f2317 (diff) | |
| download | linux-b614231dec7864a338ce85032aa3d2d7ea2bc46d.tar.bz2 | |
arm64: mte: remove an ISB on kernel exit
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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm64/kernel/entry.S | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S index 2a93fa5f4e49..a8c3e7aaca74 100644 --- a/arch/arm64/kernel/entry.S +++ b/arch/arm64/kernel/entry.S @@ -182,7 +182,6 @@ alternative_else_nop_endif mrs_s \tmp2, SYS_GCR_EL1 bfi \tmp2, \tmp, #0, #16 msr_s SYS_GCR_EL1, \tmp2 - isb #endif .endm @@ -194,6 +193,7 @@ alternative_else_nop_endif ldr_l \tmp, gcr_kernel_excl mte_set_gcr \tmp, \tmp2 + isb 1: #endif .endm |