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Re: [PATCH] arm/nospec: Make nospec helpers always_inline
- To: "Orzel, Michal" <michal.orzel@xxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: "Alejandro Vallejo" <alejandro.garciavallejo@xxxxxxx>
- Date: Wed, 07 Oct 2026 14:40:19 +0200
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- Cc: "Stefano Stabellini" <sstabellini@xxxxxxxxxx>, "Julien Grall" <julien@xxxxxxx>, "Bertrand Marquis" <bertrand.marquis@xxxxxxx>, "Volodymyr Babchuk" <Volodymyr_Babchuk@xxxxxxxx>
- Delivery-date: Wed, 07 Oct 2026 12:40:32 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On Wed Oct 7, 2026 at 2:00 PM CEST, Orzel, Michal wrote:
>
>
> On 06-Oct-26 14:29, Alejandro Vallejo wrote:
> > On Tue Oct 6, 2026 at 12:45 PM CEST, Orzel, Michal wrote:
> >>
> >>
> >> On 06-Oct-26 12:31, Alejandro Vallejo wrote:
> >>> While today they don't implement fencing in a way that would block
> >>> speculation, once/if they do they'll absolutely need to be inlined, even
> >>> if -fno-inline or -fno-early-inlining are passed.
> >>>
> >>> Signed-off-by: Alejandro Vallejo <alejandro.garciavallejo@xxxxxxx>
> >> Reviewed-by: Michal Orzel <michal.orzel@xxxxxxx>
> >>
> >> but this should be done for Arm, RISCV and PPC at once in which case you
> >> can
> >> keep my tag for v2 # for Arm.
> >
> > Neither RISCV nor PPC implement nospec.h today. Should I considered the
> > R-by just settled for this patch?
> I'm not sure I understand. You wrote that they don't implement the header
> whereas I can see:
> arch/riscv/include/asm/nospec.h
> arch/ppc/include/asm/nospec.h
> hence my remark to fix all at once.
Bah, I was on a completely different baseline than I should've been.
Even v1 doesn't apply cleanly.
Let me prep a proper v2 then.
Cheers,
Alejandro
>
> ~Michal
|
