linux-stable/Documentation/arm64
James Morse 019aa3dd4e arm64: errata: Remove AES hwcap for COMPAT tasks
[ Upstream commit 44b3834b2e ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-08-17 15:14:00 +02:00
..
acpi_object_usage.rst Documentation: arm64/acpi : clarify arm64 support of IBFT 2021-03-22 12:43:20 +00:00
amu.rst Documentation: Chinese translation of Documentation/arm64/amu.rst 2020-09-28 15:24:24 -06:00
arm-acpi.rst arm64: Replace HTTP links with HTTPS ones 2020-07-23 14:04:37 -06:00
asymmetric-32bit.rst Documentation: arm64: describe asymmetric 32-bit support 2021-08-20 12:33:07 +02:00
booting.rst arm64: document the boot requirements for MTE 2022-04-25 17:15:04 +01:00
cpu-feature-registers.rst arm64: Add HWCAP advertising FEAT_WFXT 2022-04-20 13:24:44 +01:00
elf_hwcaps.rst Merge branch kvm-arm64/wfxt into kvmarm-master/next 2022-05-04 09:42:16 +01:00
features.rst docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
hugetlbpage.rst Documentation: Chinese translation of Documentation/arm64/hugetlbpage.rst 2020-10-21 15:15:17 -06:00
index.rst arm64/sme: Provide ABI documentation for SME 2022-04-22 18:50:39 +01:00
kasan-offsets.sh arm64: mm: extend linear region for 52-bit VA configurations 2020-11-09 17:15:37 +00:00
legacy_instructions.rst docs: arm64: convert docs to ReST and rename to .rst 2019-06-14 14:20:27 -06:00
memory-tagging-extension.rst elf: Fix the arm64 MTE ELF segment name and value 2022-04-28 11:37:06 +01:00
memory.rst ARM: 2020-12-20 10:44:05 -08:00
perf.rst Documentation: arm64: Document PMU counters access from userspace 2021-12-14 11:41:19 +00:00
pointer-authentication.rst arm64: update PAC description for kernel 2021-12-02 10:13:35 +00:00
silicon-errata.rst arm64: errata: Remove AES hwcap for COMPAT tasks 2022-08-17 15:14:00 +02:00
sme.rst arm64/sme: Fix SVE/SME typo in ABI documentation 2022-06-08 18:38:31 +01:00
sve.rst arm64/sme: Provide ABI documentation for SME 2022-04-22 18:50:39 +01:00
tagged-address-abi.rst docs/arm64: delete a space from tagged-address-abi 2021-12-14 19:01:37 +00:00
tagged-pointers.rst arm64: expose FAR_EL1 tag bits in siginfo 2020-11-23 18:17:39 +00:00