]> git.baikalelectronics.ru Git - kernel.git/commit
arm64: Add skeleton to harden the branch predictor against aliasing attacks
authorWill Deacon <will.deacon@arm.com>
Wed, 3 Jan 2018 11:17:58 +0000 (11:17 +0000)
committerCatalin Marinas <catalin.marinas@arm.com>
Mon, 8 Jan 2018 18:45:25 +0000 (18:45 +0000)
commit70c1d2d5fa43cd0bcc745ffa6c32428b17bf47e9
tree918eadd8cc51a5c04e2c9d4e657a4fec8f4b29d4
parent3d7b21ecc1546ea6612cfc65ef9dd721da8de16f
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>
arch/arm64/Kconfig
arch/arm64/include/asm/cpucaps.h
arch/arm64/include/asm/mmu.h
arch/arm64/include/asm/sysreg.h
arch/arm64/kernel/Makefile
arch/arm64/kernel/bpi.S [new file with mode: 0644]
arch/arm64/kernel/cpu_errata.c
arch/arm64/kernel/cpufeature.c
arch/arm64/kernel/entry.S
arch/arm64/mm/context.c
arch/arm64/mm/fault.c