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Re: [PATCH 6/6] arm/mpu: Map domain page in AArch64 MPU systems
- To: Luca Fancellu <Luca.Fancellu@xxxxxxx>
- From: "Orzel, Michal" <michal.orzel@xxxxxxx>
- Date: Tue, 16 Dec 2025 10:32:16 +0100
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- Cc: Harry Ramsey <Harry.Ramsey@xxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Penny Zheng <Penny.Zheng@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Bertrand Marquis <Bertrand.Marquis@xxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>, Wei Chen <Wei.Chen@xxxxxxx>
- Delivery-date: Tue, 16 Dec 2025 09:32:29 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 16/12/2025 10:29, Luca Fancellu wrote:
> Hi Michael,
>
>> On 16 Dec 2025, at 09:26, Orzel, Michal <Michal.Orzel@xxxxxxx> wrote:
>>
>>
>>
>> On 28/11/2025 10:58, Harry Ramsey wrote:
>>> From: Penny Zheng <Penny.Zheng@xxxxxxx>
>>>
>>> In MPU systems, we implement map_domain_page()/unmap_domain_page()
>>> through mapping the domain page with a MPU region on demand.
>> What prevents you from implementing the remaining few helpers?
>
> Only the fact that they are not used at this stage, otherwise we would have
> seen
> a panic while running Linux.
Sure but it looks like that they would also be a few-liners hence there is a
feeling that they could all be done in one go for completeness sake.
~Michal
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