Re: problem running on rcar gen3 board (iommu?)

[Julien Grall <julien@xxxxxxx>]

(+Oleksandr)

On 29/09/2022 18:06, stsp wrote:
> Hi!
>
> I am trying to run xen on an rcar H3
> StarterKit (r8a77951 ES2.0).
> First I created a working linux setup.
> It uses latest linux git code and is
> working well. >
> Then I built xen, also from git,
> at rev 211d8419ef.
> Now when runnign xen, I get this:
>
> ---
>
> (XEN) ipmmu: /soc/iommu@e6740000: Failed to init IPMMU (-11)
> (XEN) ipmmu: /soc/iommu@e7740000: Failed to init IPMMU (-11)
> (XEN) ipmmu: /soc/iommu@e6570000: Failed to init IPMMU (-11)
> (XEN) ipmmu: /soc/iommu@ff8b0000: Failed to init IPMMU (-11)
> (XEN) ipmmu: P2M sharing is not supported in current SoC revision
> (XEN) ipmmu: /soc/iommu@e67b0000: Failed to init IPMMU (-19)
> (XEN) ipmmu: /soc/iommu@ec670000: Failed to init IPMMU (-11)
> (XEN) ipmmu: /soc/iommu@fd800000: Failed to init IPMMU (-11)
> (XEN) ipmmu: /soc/iommu@ffc80000: Failed to init IPMMU (-11)
> (XEN) ipmmu: /soc/iommu@fe6b0000: Failed to init IPMMU (-11)
> (XEN) ipmmu: /soc/iommu@fe6f0000: Failed to init IPMMU (-11)
> (XEN) ipmmu: /soc/iommu@febd0000: Failed to init IPMMU (-11)
> (XEN) ipmmu: /soc/iommu@fe990000: Failed to init IPMMU (-11)
> (XEN) ipmmu: /soc/iommu@ec680000: Failed to init IPMMU (-11)
> (XEN) ipmmu: /soc/iommu@e7730000: Failed to init IPMMU (-11)
> (XEN) I/O virtualisation disabled
> (XEN)
> (XEN) ****************************************
> (XEN) Panic on CPU 0:
> (XEN) Couldn't configure correctly all the IOMMUs.
> (XEN) ****************************************
Adding Oleksandr who wrote the driver and also worked with the Renesas SOCs.

Cheers,

> ---
>
> So I added the "iommu=0" option.
> Now linux kernel starts but hangs
> the entire system somewhere
> around the first sdcard transfer.
> I see xen is saying this on load:
>
> ---
>
> (XEN) Loading d0 kernel from boot module @ 000000007c936000
> (XEN) Allocating 1:1 mappings totalling 512MB for dom0:
> (XEN) BANK[0] 0x00000050000000-0x00000070000000 (512MB)
>
> ---
>
> If it does 1:1 mappings then perhaps
> it is supposed to work w/o IOMMU?
> But why would it then insist on me
> adding "iommu=0"?
> And there is a hang and I don't know
> if it is related to IOMMU or not...
>
> Any suggestions?
> Is rcar H3 board known to work well
> with xen?
--
Julien Grall