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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 09:29:21 +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 09:30:40 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
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- Thread-index: AQHcbm4YR0/90zis5Uafj3gh5AdGL7Uj/+kA
- Thread-topic: [PATCH 6/6] arm/mpu: Map domain page in AArch64 MPU systems
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.
Cheers,
Luca
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