Re: IOMMU problem on Xen dom0 arm (Was: Re: Xen on arm Chromebook seems to cause no display on screen)

[Chuck Zmudzinski <brchuckz@xxxxxxxxxxxx>]

On 10/27/2023 9:44 AM, Julien Grall wrote:
> Hi Chuck,
> 
> On 27/10/2023 04:42, Chuck Zmudzinski wrote:
>> On 10/26/2023 5:24 PM, Julien Grall wrote:
>>> I am not quite too sure why the check implies the IOMMU is not
>>> supported. That said, I vaguely recall that Linux will update the DMA
>>> ops when running under Xen. Would you be able to print the two values
>>> returned ("%pS" should give the symbol)?
>> 
>> I got those values:
>> 
>> [    2.552094] [drm] dma_ops(priv->dma_dev): 0xc0d018c0, 
>> dma_ops(subdrv_dev): 0xc0d662dc
>> 
>> I presume you know how to interpret those. The failed test is that they are 
>> not equal.
> 
> Unfortunately the values are specific to the kernel build.
> 
>  From [1], I was expecting that %pS would print something like:
> 
>       %pS     versatile_init+0x0/0x110
> 
> Can you use 'nm', gdb or addr2line to find out the associated the symbols?