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Message-ID: <CABi2SkWU6orm-wBFKVt9rsSpYURHPb7fjHRzkOiPGd=Lh-DdkA@mail.gmail.com>
Date: Mon, 17 Mar 2025 11:14:36 -0700
From: Jeff Xu <jeffxu@...omium.org>
To: Geert Uytterhoeven <geert@...ux-m68k.org>
Cc: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>, akpm@...ux-foundation.org,
Liam.Howlett@...cle.com, agordeev@...ux.ibm.com, borntraeger@...ux.ibm.com,
gor@...ux.ibm.com, hca@...ux.ibm.com, kees@...nel.org,
linux-hardening@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-mm@...ck.org, svens@...ux.ibm.com, thomas.weissschuh@...utronix.de
Subject: Re: [PATCH] mseal sysmap: add arch-support txt
On Fri, Mar 14, 2025 at 3:41 AM Geert Uytterhoeven <geert@...ux-m68k.org> wrote:
>
> Hi Jeff,
>
> On Thu, 13 Mar 2025 at 23:26, Jeff Xu <jeffxu@...omium.org> wrote:
> > On Wed, Mar 12, 2025 at 10:21 PM Lorenzo Stoakes
> > <lorenzo.stoakes@...cle.com> wrote:
> > > On Thu, Mar 13, 2025 at 12:06:23AM +0000, jeffxu@...omium.org wrote:
> > > > From: Jeff Xu <jeffxu@...omium.org>
> > > > Add Documentation/features/core/mseal_sys_mappings/arch-support.txt
> > > >
> > > > Signed-off-by: Jeff Xu <jeffxu@...omium.org>
>
> Thanks for your patch!
>
> > > > --- /dev/null
> > > > +++ b/Documentation/features/core/mseal_sys_mappings/arch-support.txt
> > > > @@ -0,0 +1,30 @@
> > > > +#
> > > > +# Feature name: mseal-system-mappings
> > > > +# Kconfig: ARCH_SUPPORTS_MSEAL_SYSTEM_MAPPINGS
> > > > +# description: arch supports mseal system mappings
> > > > +#
> > > > + -----------------------
> > > > + | arch |status|
> > > > + -----------------------
> > > > + | alpha: | TODO |
> > > > + | arc: | TODO |
> > > > + | arm: | N/A |
> > > > + | arm64: | ok |
> > > > + | csky: | TODO |
> > > > + | hexagon: | TODO |
> > > > + | loongarch: | TODO |
> > > > + | m68k: | TODO |
> > > > + | microblaze: | TODO |
> > > > + | mips: | TODO |
> > > > + | nios2: | TODO |
> > > > + | openrisc: | TODO |
> > > > + | parisc: | TODO |
> > > > + | powerpc: | TODO |
> > > > + | riscv: | TODO |
> > > > + | s390: | ok |
> > > > + | sh: | TODO |
> > > > + | sparc: | TODO |
> > > > + | um: | TODO |
> > > > + | x86: | ok |
> > > > + | xtensa: | TODO |
> > > > + -----------------------
>
> > > Plus I feel this need expansion a bit 'N/A' is because of being non-64 bit
> > > right?
> > >
> > Below is the definition of N/A in Documentation/features/arch-support.txt
> > | N/A| # feature doesn't apply to the architecture
> >
> > It fits the arm case because mseal is not supported in 32 bit.
>
> IIUIC, you can already s@...O@N/A@ for all other 32-bit architectures,
> so we don't accidentally spend time on looking into adding the support?
>
Sure, my architecture knowledge is limited.
I just checked this, it seems to me that csky, m68k, nios2, sh, xtensa
doesn't have 64 bits support, the rest have 64 bits. Is this correct ?
Thanks
-Jeff
> Gr{oetje,eeting}s,
>
> Geert
>
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org
>
> In personal conversations with technical people, I call myself a hacker. But
> when I'm talking to journalists I just say "programmer" or something like that.
> -- Linus Torvalds
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