arm64: KVM: Add workaround for Cortex-A57 erratum 834220

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Cortex-A57 parts up to r1p2 can misreport Stage 2 translation faults
when a Stage 1 permission fault or device alignment fault should
have been reported.

This patch implements the workaround (which is to validate that the
Stage-1 translation actually succeeds) by using code patching.

Cc: stable@vger.kernel.org
Reviewed-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>

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Marc Zyngier 2015-11-16 10:28:18 +00:00 • committed by Christoffer Dall

parent c0f0963464

commit 498cd5c32b

4 changed files with 38 additions and 1 deletions

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21

arch/arm64/Kconfig

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3

arch/arm64/include/asm/cpufeature.h

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9

arch/arm64/kernel/cpu_errata.c

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6

arch/arm64/kvm/hyp.S

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