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ARM: include unprivileged BPF status in Spectre V2 reporting
authorRussell King (Oracle) <rmk+kernel@armlinux.org.uk>
Mon, 7 Mar 2022 19:28:32 +0000 (19:28 +0000)
committerRussell King (Oracle) <rmk+kernel@armlinux.org.uk>
Tue, 8 Mar 2022 14:46:08 +0000 (14:46 +0000)
commitf59cb16d36d0f11612432ce48e4ac0661f42bcc2
tree85333d5e2e4f143773dc9e455c156a8ad73c3afatree | snapshot
parent366da5875e4655a65bbb20f7abe780aa03371706commit | diff
ARM: include unprivileged BPF status in Spectre V2 reporting

The mitigations for Spectre-BHB are only applied when an exception
is taken, but when unprivileged BPF is enabled, userspace can
load BPF programs that can be used to exploit the problem.

When unprivileged BPF is enabled, report the vulnerable status via
the spectre_v2 sysfs file.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
arch/arm/kernel/spectre.c diff | blob | history
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