diff options
| author | James Morse <james.morse@arm.com> | 2022-07-14 19:15:23 +0300 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2022-07-19 21:27:01 +0300 |
| commit | 44b3834b2eed595af07021b1c64e6f9bc396398b (patch) | |
| tree | 6edd3d5aeff720c50d407985db85f122ca3bd394 /arch/arm64/tools | |
| parent | 39fdb65f52e9a53d32a6ba719f96669fd300ae78 (diff) | |
| download | linux-44b3834b2eed595af07021b1c64e6f9bc396398b.tar.xz | |
arm64: errata: Remove AES hwcap for COMPAT tasks
Cortex-A57 and Cortex-A72 have an erratum where an interrupt that
occurs between a pair of AES instructions in aarch32 mode may corrupt
the ELR. The task will subsequently produce the wrong AES result.
The AES instructions are part of the cryptographic extensions, which are
optional. User-space software will detect the support for these
instructions from the hwcaps. If the platform doesn't support these
instructions a software implementation should be used.
Remove the hwcap bits on affected parts to indicate user-space should
not use the AES instructions.
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: James Morse <james.morse@arm.com>
Link: https://lore.kernel.org/r/20220714161523.279570-3-james.morse@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/arm64/tools')
| -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 507b20373953..8809e14cf86a 100644 --- a/arch/arm64/tools/cpucaps +++ b/arch/arm64/tools/cpucaps @@ -61,6 +61,7 @@ WORKAROUND_1418040 WORKAROUND_1463225 WORKAROUND_1508412 WORKAROUND_1542419 +WORKAROUND_1742098 WORKAROUND_1902691 WORKAROUND_2038923 WORKAROUND_2064142 |