Commit c2cc62d8 authored Jan 09, 2019 by Marc Zyngier

arm64: Enable and document ARM errata 1319367 and 1319537



Now that everything is in place, let's get the ball rolling
by allowing the corresponding config option to be selected.
Also add the required information to silicon_errata.rst.

Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>

parent bd227553

Documentation/arm64/silicon-errata.rst

+4 −0

Original line number	Diff line number	Diff line
		@@ -70,8 +70,12 @@ stable kernels.
		+----------------+-----------------+-----------------+-----------------------------+
		\| ARM \| Cortex-A57 \| #834220 \| ARM64_ERRATUM_834220 \|
		+----------------+-----------------+-----------------+-----------------------------+
		\| ARM \| Cortex-A57 \| #1319537 \| ARM64_ERRATUM_1319367 \|
		+----------------+-----------------+-----------------+-----------------------------+
		\| ARM \| Cortex-A72 \| #853709 \| N/A \|
		+----------------+-----------------+-----------------+-----------------------------+
		\| ARM \| Cortex-A72 \| #1319367 \| ARM64_ERRATUM_1319367 \|
		+----------------+-----------------+-----------------+-----------------------------+
		\| ARM \| Cortex-A73 \| #858921 \| ARM64_ERRATUM_858921 \|
		+----------------+-----------------+-----------------+-----------------------------+
		\| ARM \| Cortex-A55 \| #1024718 \| ARM64_ERRATUM_1024718 \|

arch/arm64/Kconfig

+10 −0

Original line number	Diff line number	Diff line
		@@ -538,6 +538,16 @@ config ARM64_ERRATUM_1286807
		invalidated has been observed by other observers. The
		workaround repeats the TLBI+DSB operation.

		config ARM64_ERRATUM_1319367
		bool "Cortex-A57/A72: Speculative AT instruction using out-of-context translation regime could cause subsequent request to generate an incorrect translation"
		default y
		help
		This option adds work arounds for ARM Cortex-A57 erratum 1319537
		and A72 erratum 1319367

		Cortex-A57 and A72 cores could end-up with corrupted TLBs by
		speculating an AT instruction during a guest context switch.

		If unsure, say Y.

		config ARM64_ERRATUM_1463225