summaryrefslogtreecommitdiff
path: root/Documentation/arm64
diff options
context:
space:
mode:
authorJames Morse <james.morse@arm.com>2022-07-14 19:15:23 +0300
committerWill Deacon <will@kernel.org>2022-07-19 21:27:01 +0300
commit44b3834b2eed595af07021b1c64e6f9bc396398b (patch)
tree6edd3d5aeff720c50d407985db85f122ca3bd394 /Documentation/arm64
parent39fdb65f52e9a53d32a6ba719f96669fd300ae78 (diff)
downloadlinux-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 'Documentation/arm64')
-rw-r--r--Documentation/arm64/silicon-errata.rst4
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/arm64/silicon-errata.rst b/Documentation/arm64/silicon-errata.rst
index 250306a37a65..33b04db8408f 100644
--- a/Documentation/arm64/silicon-errata.rst
+++ b/Documentation/arm64/silicon-errata.rst
@@ -82,10 +82,14 @@ stable kernels.
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A57 | #1319537 | ARM64_ERRATUM_1319367 |
+----------------+-----------------+-----------------+-----------------------------+
+| ARM | Cortex-A57 | #1742098 | ARM64_ERRATUM_1742098 |
++----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A72 | #853709 | N/A |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A72 | #1319367 | ARM64_ERRATUM_1319367 |
+----------------+-----------------+-----------------+-----------------------------+
+| ARM | Cortex-A72 | #1655431 | ARM64_ERRATUM_1742098 |
++----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A73 | #858921 | ARM64_ERRATUM_858921 |
+----------------+-----------------+-----------------+-----------------------------+
| ARM | Cortex-A76 | #1188873,1418040| ARM64_ERRATUM_1418040 |