Re: [PATCH RFC RFT v2 1/5] mm: Introduce ARCH_HAS_USER_SHADOW_STACK

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On Tue, 2023-11-14 at 20:05 +0000, Mark Brown wrote:
> +config ARCH_HAS_USER_SHADOW_STACK
> +       bool
> +       help
> +         The architecture has hardware support for userspace shadow
> call
> +          stacks (eg, x86 CET, arm64 GCS, RISC-V Zisslpcfi).

I feel like normally a patch like this should come with the second
feature that gets enabled. (i.e. arm or riscv). Especially since the
comment lists currently unsupported features. I think something like
this got nixed by an x86 maintainer earlier, but that was before these
other features were getting pushed.

I don't have a strong objection to having it ahead of the other
features though and it is nice to remove X86 defines out of core code.




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