Re: Asking for help to debug xen efi on Kunpeng machine

[Jiatong Shen <yshxxsjt715@xxxxxxxxx>]

Hello Julien,

   Thank you very much for your reply. Can you teach me how to find the relationship between MBI-gen and devices? 

I am not sure how to find out the mbi-gen backed devices..

Best Regards,

Jiatong Shen

On Sat, Jun 24, 2023 at 4:24 PM Julien Grall <julien@xxxxxxx> wrote:

Hi,

On 20/06/2023 08:09, Jiatong Shen wrote:
> Hello Julien,
>
>     Sorry for the delay.. I obtained the full xen log and attached it in the
> mail. Please take a look when you are available. Thank you very much

Thanks for sharing the logs. The following lines are interesting:

[    1.081905] Hisilicon MBIGEN-V2 HISI0152:00: Failed to create mbi-gen
irqdomain
[    1.082107] Hisilicon MBIGEN-V2 HISI0152:01: Failed to create mbi-gen
irqdomain
[    1.082204] Hisilicon MBIGEN-V2 HISI0152:02: Failed to create mbi-gen
irqdomain
[    1.082294] Hisilicon MBIGEN-V2 HISI0152:03: Failed to create mbi-gen
irqdomain
[    1.082381] Hisilicon MBIGEN-V2 HISI0152:04: Failed to create mbi-gen
irqdomain
[    1.082466] Hisilicon MBIGEN-V2 HISI0152:05: Failed to create mbi-gen
irqdomain

Looking at a Hisilicon Device-Tree, this is an interrupt controller
behind the GICv3 ITS. You will need to rebuild Xen with CONFIG_HAS_ITS=y.

Also, can you confirm which devices are behind the MBI-Gen? If this is
only PCI devices, then you are probably fine to give the controllers to
dom0. But for PCI passthrough, you will most likely need to implement it
a driver in Xen.

Cheers,

--
Julien Grall

--

Best Regards,

Jiatong Shen