linux-kernel - Re: [PATCH RFT v6 3/9] mm: Introduce ARCH_HAS_USER_SHADOW

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Message-ID: <87ttgqt0hx.fsf@linaro.org>
Date: Tue, 16 Jul 2024 01:38:18 -0300
From: Thiago Jung Bauermann <thiago.bauermann@...aro.org>
To: broonie@...nel.org
Cc: Szabolcs.Nagy@....com,bp@...en8.de,brauner@...nel.org,bristot@...hat.com,bsegall@...gle.com,catalin.marinas@....com,dave.hansen@...ux.intel.com,david@...hat.com,debug@...osinc.com,dietmar.eggemann@....com,fweimer@...hat.com,hjl.tools@...il.com,hpa@...or.com,jannh@...gle.com,juri.lelli@...hat.com,kees@...nel.org,linux-api@...r.kernel.org,linux-kernel@...r.kernel.org,linux-kselftest@...r.kernel.org,mgorman@...e.de,mingo@...hat.com,peterz@...radead.org,rick.p.edgecombe@...el.com,rostedt@...dmis.org,shuah@...nel.org,tglx@...utronix.de,vincent.guittot@...aro.org,vschneid@...hat.com,will@...nel.org,x86@...nel.org
Subject: Re: [PATCH RFT v6 3/9] mm: Introduce ARCH_HAS_USER_SHADOW_STACK


Hello,

> diff --git a/mm/Kconfig b/mm/Kconfig
> index b4cb45255a54..45416916dec1 100644
> --- a/mm/Kconfig
> +++ b/mm/Kconfig
> @@ -1249,6 +1249,12 @@ config IOMMU_MM_DATA
>  config EXECMEM
>  	bool
>  
> +config ARCH_HAS_USER_SHADOW_STACK
> +	bool
> +	help
> +	  The architecture has hardware support for userspace shadow call
> +          stacks (eg, x87 CET, arm64 GCS or RISC-V Zicfiss).

s/x87/x86/ ?

-- 
Thiago