linux-dev/arch/arm/kernel/spectre.c, branch linus/master

ARM: fix build error when BPF_SYSCALL is disabled

2022-03-08T20:53:05Z

It was missing a semicolon. Signed-off-by: Emmanuel Gil Peyrot Reviewed-by: Nathan Chancellor Fixes: 25875aa71dfe ("ARM: include unprivileged BPF status in Spectre V2 reporting"). Signed-off-by: Linus Torvalds

ARM: include unprivileged BPF status in Spectre V2 reporting

2022-03-08T14:46:08Z

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)

ARM: Spectre-BHB workaround

2022-03-05T10:42:07Z

Workaround the Spectre BHB issues for Cortex-A15, Cortex-A57, Cortex-A72, Cortex-A73 and Cortex-A75. We also include Brahma B15 as well to be safe, which is affected by Spectre V2 in the same ways as Cortex-A15. Reviewed-by: Catalin Marinas Signed-off-by: Russell King (Oracle)

ARM: report Spectre v2 status through sysfs

2022-03-05T10:41:22Z

As per other architectures, add support for reporting the Spectre vulnerability status via sysfs CPU. Acked-by: Catalin Marinas Signed-off-by: Russell King (Oracle)