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authorWill Deacon <will.deacon@arm.com>2018-01-03 11:17:58 +0000
committerCatalin Marinas <catalin.marinas@arm.com>2018-01-08 18:45:25 +0000
commit0f15adbb2861ce6f75ccfc5a92b19eae0ef327d0 (patch)
tree918eadd8cc51a5c04e2c9d4e657a4fec8f4b29d4 /virt
parent95e3de3590e3f2358bb13f013911bc1bfa5d3f53 (diff)
downloadlinux-stericsson-0f15adbb2861ce6f75ccfc5a92b19eae0ef327d0.tar.gz
arm64: Add skeleton to harden the branch predictor against aliasing attacks
Aliasing attacks against CPU branch predictors can allow an attacker to redirect speculative control flow on some CPUs and potentially divulge information from one context to another. This patch adds initial skeleton code behind a new Kconfig option to enable implementation-specific mitigations against these attacks for CPUs that are affected. Co-developed-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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