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arm64: Unify WORKAROUND_SPECULATIVE_AT_{NVHE,VHE}

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Errata 1165522, 1319367 and 1530923 each allow TLB entries to be
allocated as a result of a speculative AT instruction. In order to
avoid mandating VHE on certain affected CPUs, apply the workaround to
both the nVHE and the VHE case for all affected CPUs.

Signed-off-by: Andrew Scull <ascull@google.com>
Acked-by: Will Deacon <will@kernel.org>
CC: Marc Zyngier <maz@kernel.org>
CC: James Morse <james.morse@arm.com>
CC: Suzuki K Poulose <suzuki.poulose@arm.com>
CC: Will Deacon <will@kernel.org>
CC: Steven Price <steven.price@arm.com>
Link: https://lore.kernel.org/r/20200504094858.108917-1-ascull@google.com
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Andrew Scull
2020-05-04 10:48:58 +01:00
committed by Will Deacon
parent 6a8b55ed40
commit 02ab1f5018
8 changed files with 51 additions and 59 deletions
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4
arch/arm64/include/asm/kvm_host.h
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@@ -573,10 +573,6 @@ static inline bool kvm_arch_requires_vhe(void)
if (system_supports_sve())
return true;
/* Some implementations have defects that confine them to VHE */
if (cpus_have_cap(ARM64_WORKAROUND_SPECULATIVE_AT_VHE))
return true;
return false;
}