Re: [RFC PATCH] xen/dm: arm: Introudce arm_inject_msi DM op

[Julien Grall <julien@xxxxxxx>]

Hi,

On 19/12/2023 14:18, Mykyta Poturai wrote:
> Following up with relevant QEMU patch link.
>
> https://patchwork.kernel.org/project/qemu-devel/patch/c7a180a5874f036c246fc39f921eefafecbc8c76.1702994649.git.mykyta_poturai@xxxxxxxx/
I don't seem to have the patch in my inbox. I guess you didn't CC xen-devel?

Anyway, I will reply here. I think this is a mistake for QEMU to assume 
that Xen will expose a GICv3 ITS to the guest (we may decide to 
implement another MSI controller).
But QEMU should really not need to implement a full ITS. What it needs 
is a way to forward the MSI to Xen. That's it.
Stefano, do you have any suggestion how to do this in QEMU?

Cheers,

--
Julien Grall