arm64: Enable ARM64_HARDEN_EL2_VECTORS on Cortex-A57 and A72

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Cortex-A57 and A72 are vulnerable to the so-called "variant 3a" of
Meltdown, where an attacker can speculatively obtain the value
of a privileged system register.

By enabling ARM64_HARDEN_EL2_VECTORS on these CPUs, obtaining
VBAR_EL2 is not disclosing the hypervisor mappings anymore.

Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>

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Marc Zyngier 2018-02-15 11:49:20 +00:00

parent dee39247dc

commit 4b472ffd15

1 changed files with 12 additions and 0 deletions

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arch/arm64/kernel/cpu_errata.c

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