Hi all,
On Sat, 13 Apr 2024 19:38:47 +1000 Michael Ellerman <mpe@xxxxxxxxxxxxxx> wrote:
>
> Michael Ellerman <mpe@xxxxxxxxxxxxxx> writes:
> > Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> writes:
> ...
> >> On Tue, 9 Apr 2024 10:51:05 -0700 Sean Christopherson <seanjc@xxxxxxxxxx> wrote:
> ...
> >>> diff --git a/kernel/cpu.c b/kernel/cpu.c
> >>> index 8f6affd051f7..07ad53b7f119 100644
> >>> --- a/kernel/cpu.c
> >>> +++ b/kernel/cpu.c
> >>> @@ -3207,7 +3207,8 @@ enum cpu_mitigations {
> >>> };
> >>>
> >>> static enum cpu_mitigations cpu_mitigations __ro_after_init =
> >>> - CPU_MITIGATIONS_AUTO;
> >>> + IS_ENABLED(CONFIG_SPECULATION_MITIGATIONS) ? CPU_MITIGATIONS_AUTO :
> >>> + CPU_MITIGATIONS_OFF;
> >>>
> >>> static int __init mitigations_parse_cmdline(char *arg)
> >>> {
>
> I think a minimal workaround/fix would be:
>
> diff --git a/drivers/base/Kconfig b/drivers/base/Kconfig
> index 2b8fd6bb7da0..290be2f9e909 100644
> --- a/drivers/base/Kconfig
> +++ b/drivers/base/Kconfig
> @@ -191,6 +191,10 @@ config GENERIC_CPU_AUTOPROBE
> config GENERIC_CPU_VULNERABILITIES
> bool
>
> +config SPECULATION_MITIGATIONS
> + def_bool y
> + depends on !X86
> +
> config SOC_BUS
> bool
> select GLOB
The original commit is now in Linus' tree.
--
Cheers,
Stephen Rothwell
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