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Re: [PATCH v2] docs: fusa: Add dom0less domain configuration requirements


  • To: Bertrand Marquis <Bertrand.Marquis@xxxxxxx>, Ayan Kumar Halder <ayankuma@xxxxxxx>
  • From: Michal Orzel <michal.orzel@xxxxxxx>
  • Date: Wed, 18 Dec 2024 14:56:36 +0100
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  • Cc: Ayan Kumar Halder <ayan.kumar.halder@xxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>, "Stefano Stabellini" <sstabellini@xxxxxxxxxx>, Artem Mygaiev <artem_mygaiev@xxxxxxxx>
  • Delivery-date: Wed, 18 Dec 2024 13:57:16 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>


On 18/12/2024 14:08, Bertrand Marquis wrote:
> 
> 
> Hi Ayan,
> 
>> On 18 Dec 2024, at 12:34, Ayan Kumar Halder <ayankuma@xxxxxxx> wrote:
>>
>>
>> On 18/12/2024 08:27, Bertrand Marquis wrote:
>>> Hi Ayan,
>> Hi Bertrand,
>>>
>>>> On 12 Dec 2024, at 20:03, Ayan Kumar Halder <ayan.kumar.halder@xxxxxxx> 
>>>> wrote:
>>>>
>>>> From: Michal Orzel <michal.orzel@xxxxxxx>
>>>>
>>>> Add requirements for dom0less domain creation.
>>>>
>>>> Signed-off-by: Michal Orzel <michal.orzel@xxxxxxx>
>>>> Signed-off-by: Ayan Kumar Halder <ayan.kumar.halder@xxxxxxx>
>>>> ---
[...]

>>>> +SPIs
>>>> +----
>>>> +
>>>> +`XenSwdgn~spis~1`
>>>> +
>>>> +Description:
>>>> +Xen shall allocate a specified number of shared peripheral interrupts for 
>>>> a
>>>> +domain.
>>> This is very ambiguous. What do you mean here ?
>> Xen shall provide a way to specify the number of shared peripheral 
>> interrupts for a domain via the device tree .
> 
> I am lost in how you achieve such a thing in the configuration.
> All you can do is assigned an interrupt to a domain, but the sharing part I 
> do not see what Xen has to do with it.
This req is about Arm's SPIs (Shared Peripheral Interrupts) and the max number 
you can allocate to a domU.
You can see more here:
https://xenbits.xenproject.org/gitweb/?p=xen.git;a=blob;f=docs/misc/arm/device-tree/booting.txt;hb=HEAD#l172

~Michal




 


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