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| author | Russell King <rmk+kernel@armlinux.org.uk> | 2018-04-20 10:06:27 +0100 |
|---|---|---|
| committer | Moyster <oysterized@gmail.com> | 2019-05-03 18:15:23 +0200 |
| commit | e6094df37fd993af523aa4f66c66b50fb91da468 (patch) | |
| tree | cacfb41dfc1cc08f1f382b63e4a75ac83dda4d31 /kernel/task_work.c | |
| parent | a0dfbc67490078c9375de7f85b12018a3c7151ff (diff) | |
ARM: spectre-v2: harden branch predictor on context switches
Harden the branch predictor against Spectre v2 attacks on context
switches for ARMv7 and later CPUs. We do this by:
Cortex A9, A12, A17, A73, A75: invalidating the BTB.
Cortex A15, Brahma B15: invalidating the instruction cache.
Cortex A57 and Cortex A72 are not addressed in this patch.
Cortex R7 and Cortex R8 are also not addressed as we do not enforce
memory protection on these cores.
Change-Id: Ic2fb57dd40b6f7fc22a62f267ab24441ab09cc4b
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Boot-tested-by: Tony Lindgren <tony@atomide.com>
Reviewed-by: Tony Lindgren <tony@atomide.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'kernel/task_work.c')
0 files changed, 0 insertions, 0 deletions