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Re: [PATCH] arm/nospec: Make nospec helpers always_inline
- To: Alejandro Vallejo <alejandro.garciavallejo@xxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: "Orzel, Michal" <michal.orzel@xxxxxxx>
- Date: Wed, 7 Oct 2026 14:00:29 +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 12:00:48 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
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.
~Michal
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