arm64: Extend workaround for erratum 1024718 to all versions of Cortex-A55
authorSuzuki K Poulose <suzuki.poulose@arm.com>
Wed, 3 Feb 2021 23:00:57 +0000 (23:00 +0000)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 4 Mar 2021 10:38:35 +0000 (11:38 +0100)
commit32009c5d178e71cae7243a225c526af62d9d2aa6
tree2752eb1bf3e5949d9ab22800ca95765ad9e12daf
parentc9b33f7cbe453f1a1397b4137502bda346d92ef3
arm64: Extend workaround for erratum 1024718 to all versions of Cortex-A55

commit c0b15c25d25171db4b70cc0b7dbc1130ee94017d upstream.

The erratum 1024718 affects Cortex-A55 r0p0 to r2p0. However
we apply the work around for r0p0 - r1p0. Unfortunately this
won't be fixed for the future revisions for the CPU. Thus
extend the work around for all versions of A55, to cover
for r2p0 and any future revisions.

Cc: stable@vger.kernel.org
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: James Morse <james.morse@arm.com>
Cc: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20210203230057.3961239-1-suzuki.poulose@arm.com
[will: Update Kconfig help text]
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
arch/arm64/Kconfig
arch/arm64/kernel/cpufeature.c