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arm64: Implement branch predictor hardening for Falkor

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Falkor is susceptible to branch predictor aliasing and can
theoretically be attacked by malicious code. This patch
implements a mitigation for these attacks, preventing any
malicious entries from affecting other victim contexts.

Signed-off-by: Shanker Donthineni <shankerd@codeaurora.org>
[will: fix label name when !CONFIG_KVM and remove references to MIDR_FALKOR]
Signed-off-by: Will Deacon <will.deacon@arm.com>

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Shanker Donthineni 2018-01-05 14:28:59 -06:00 • committed by Catalin Marinas
commit ec82b567a7
6 changed files with 70 additions and 3 deletions
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