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Re: [PATCH 6/6] arm/mpu: Map domain page in AArch64 MPU systems
- To: "Orzel, Michal" <Michal.Orzel@xxxxxxx>
- From: Luca Fancellu <Luca.Fancellu@xxxxxxx>
- Date: Tue, 16 Dec 2025 09:57:25 +0000
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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 09:58:44 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
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- Thread-topic: [PATCH 6/6] arm/mpu: Map domain page in AArch64 MPU systems
> On 16 Dec 2025, at 09:32, Orzel, Michal <Michal.Orzel@xxxxxxx> wrote:
>
>
>
> 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.
yeah but we don’t have the confidence it works because we can’t test
Cheers,
Luca
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