Re: [Xen-devel] [PATCH 0/6] iomem cacheability

[Julien Grall <Julien.Grall@xxxxxxx>]

Hi,

On 06/03/2019 22:42, Stefano Stabellini wrote:
> On Wed, 6 Mar 2019, Amit Tomer wrote:
>> Hi,
>>> Looking at the stack trace, this is very likely due to the issue I pointed 
>>> out earlier on. I.e reserved-memory region should be described in the 
>>> memory nodes.
>>
>> Do you mean, something like this(reserved-memory node is under memory node) ?
> 
> No, I think Julien meant that all the reserved-memory regions ranges
> should be "covered" by the ranges of the memory node.
> 
> If a reserved-memory node range is 0x54000000 - 0x57000000, then we need
> to make sure that the memory node includes that range. In your case, the
> first memory bank is 0x48000000 - 0x80000000 so it would clearly include
> the range 0x54000000 - 0x57000000. So, it looks like it is correct from
> that point of view.

Not really, the DT provided by Amit is for the host. The memory node 
will be rewritten by Xen for Dom0  and does not include the 
reserved-memory regions so far.

> 
> I am suspecting there is a bug in the patch "xen/arm: map
> reserved-memory regions as normal memory in dom0", specifically in the
> implementation of check_reserved_memory.

I don't think the issue is in that code (see above).

Cheers,

-- 
Julien Grall
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