Re: About arm32 address translation

[Chen Baozi <baozich@gmail.com>]

On Oct 16, 2013, at 6:24 PM, Ian Campbell <Ian.Campbell@citrix.com> wrote:

> On Wed, 2013-10-16 at 18:02 +0800, Chen Baozi wrote:
>> On Oct 16, 2013, at 5:25 PM, Ian Campbell <Ian.Campbell@citrix.com> wrote:
>> 
>>> On Wed, 2013-10-16 at 17:20 +0800, Chen Baozi wrote:
>>>> Hi Ian,
>>>> 
>>>> I am trying to add supporting dumping 32-bit guest on arm32 to see
>>>> what happened in my dom0 kernel when booting. It seems
>>>> gvirt_to_maddr() is not workable under arm32.
>>> 
>>> What makes you say that, it should work, or else it is buggy and we've
>>> not noticed, but it is used in copy to/from user routines so I doubt
>>> that.
>> 
>> Ok, I'll look into it. The output shows me "Failed to convert stack to
>> physical address". In this case, it must be gvirt_to_maddr to return
>> -EFAULT.
> 
> That suggests that the guest's SP doesn't have a mapping in the guest's
> PTs. What's the full trace?

I may have missed lots of work when trying to enable this, for this is my first time to work on tracing related work, ;-)

Cheers,

Baozi