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Re: [PATCH v2 2/2] make ioremap_wc() x86 only (for the time being)
- To: Luca Fancellu <Luca.Fancellu@xxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Thu, 9 Apr 2026 10:01:24 +0200
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- Cc: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Alistair Francis <alistair.francis@xxxxxxx>, Connor Davis <connojdavis@xxxxxxxxx>, Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>, Bertrand Marquis <Bertrand.Marquis@xxxxxxx>, Volodymyr Babchuk <volodymyr_babchuk@xxxxxxxx>
- Delivery-date: Thu, 09 Apr 2026 08:01:31 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 09.04.2026 09:52, Luca Fancellu wrote:
>> On 8 Apr 2026, at 13:09, Jan Beulich <jbeulich@xxxxxxxx> wrote:
>>
>> Its use in domain building is questionable: Already at the point both uses
>> were introduced, ioremap_cache() existed. I can't see why kernel and
>> initrd would need mapping WC, when at the same time other similar mappings
>> (in common/device-tree/) are done WB.
>>
>> With those uses replaced, neither Arm nor RISC-V have a need for the
>> function anymore.
>>
>> Amends: d8972aa9645f ("xen/arm: kernel: Rework kernel_zimage_load to use the
>> generic copy helper")
>> Amends: bb7e6d565d92 ("xen/arm: domain_build: Rework initrd_load to use the
>> generic copy helper")
>> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
>> Reviewed-by: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>
>
>
> Reviewed the arm and common part, tested on arm64 mmu, arm32 mmu, arm64 mpu:
>
> Reviewed-by: Luca Fancellu <luca.fancellu@xxxxxxx>
> Tested-by: Luca Fancellu <luca.fancellu@xxxxxxx>
Thanks, but I guess I'll use the form you sent earlier, with the restricted tags
(matching what you say separately).
Jan
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