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Re: [PATCH 04/10] arm/mpu: Implement virt/maddr conversion in MPU system
- To: Luca Fancellu <luca.fancellu@xxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- From: "Orzel, Michal" <michal.orzel@xxxxxxx>
- Date: Thu, 13 Mar 2025 09:55:44 +0100
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- Cc: 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: Thu, 13 Mar 2025 08:56:02 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 13/03/2025 09:48, Orzel, Michal wrote:
>
>
> On 12/03/2025 14:52, Luca Fancellu wrote:
>>
>>
>> From: Penny Zheng <Penny.Zheng@xxxxxxx>
>>
>> virt_to_maddr and maddr_to_virt are used widely in Xen code. So
>> even there is no VMSA in MPU system, we keep the interface in MPU to
>> don't change the existing common code.
>>
>> In order to do that, move the virt_to_maddr() definition to mmu/mm.h,
>> instead for maddr_to_virt() it's more difficult to isolate it under mmu/
>> so it will be protected by #ifdef CONFIG_MMU.
> I don't understand this rationale. I did a quick test and moving maddr_to_virt
> to mmu/mm.h works just fine.
Ignore this comment. I was not right.
~Michal
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