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| author | James Morse <james.morse@arm.com> | 2022-09-09 18:59:38 +0200 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2022-09-16 16:23:50 +0200 |
| commit | 1bdb0fbb2e27c51a6f311867726462c983a1d9ee (patch) | |
| tree | 729c45d634d041e7e6e9a306d91c6692011664a9 /arch/arm64/tools/cpucaps | |
| parent | arm64: cpufeature: Expose get_arm64_ftr_reg() outside cpufeature.c (diff) | |
| download | linux-1bdb0fbb2e27c51a6f311867726462c983a1d9ee.tar.xz linux-1bdb0fbb2e27c51a6f311867726462c983a1d9ee.zip | |
arm64: errata: remove BF16 HWCAP due to incorrect result on Cortex-A510
Cortex-A510's erratum #2658417 causes two BF16 instructions to return the
wrong result in rare circumstances when a pair of A510 CPUs are using
shared neon hardware.
The two instructions affected are BFMMLA and VMMLA, support for these is
indicated by the BF16 HWCAP. Remove it on affected platforms.
Signed-off-by: James Morse <james.morse@arm.com>
Link: https://lore.kernel.org/r/20220909165938.3931307-4-james.morse@arm.com
[catalin.marinas@arm.com: add revision to the Kconfig help; remove .type]
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/tools/cpucaps')
| -rw-r--r-- | arch/arm64/tools/cpucaps | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm64/tools/cpucaps b/arch/arm64/tools/cpucaps index 63b2484ce6c3..f553a7cb1b07 100644 --- a/arch/arm64/tools/cpucaps +++ b/arch/arm64/tools/cpucaps @@ -68,6 +68,7 @@ WORKAROUND_2038923 WORKAROUND_2064142 WORKAROUND_2077057 WORKAROUND_2457168 +WORKAROUND_2658417 WORKAROUND_TRBE_OVERWRITE_FILL_MODE WORKAROUND_TSB_FLUSH_FAILURE WORKAROUND_TRBE_WRITE_OUT_OF_RANGE |