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Re: [PATCH v3 6/6] xen/arm: mpu: Implement a dummy enable_secondary_cpu_mm
- To: Ayan Kumar Halder <ayan.kumar.halder@xxxxxxx>
- From: Luca Fancellu <Luca.Fancellu@xxxxxxx>
- Date: Mon, 14 Oct 2024 19:13:29 +0000
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- Cc: Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, Julien Grall <julien@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Bertrand Marquis <Bertrand.Marquis@xxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>
- Delivery-date: Mon, 14 Oct 2024 19:13:51 +0000
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- Thread-topic: [PATCH v3 6/6] xen/arm: mpu: Implement a dummy enable_secondary_cpu_mm
Hi Ayan,
> On 10 Oct 2024, at 15:03, Ayan Kumar Halder <ayan.kumar.halder@xxxxxxx> wrote:
>
> Secondary cpus initialization is not yet supported. Thus, we print an
> appropriate message and put the secondary cpus in WFE state.
> And we introduce to BUILD_BUG_ON to prevent users using from building Xen
> on multiprocessor based MPU systems.
>
> In Arm, there is no clean way to disable SMP. As of now, we wish to support
> MPU on UNP only. So, we have defined the default range of NR_CPUs to be 1 for
> MPU.
>
> Signed-off-by: Ayan Kumar Halder <ayan.kumar.halder@xxxxxxx>
Apart from Jan’s comment, the rest of the changes to the arch/arm part looks ok
to me:
Reviewed-by: Luca Fancellu <luca.fancellu@xxxxxxx>
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