[Xen-devel] Xen/ARM: Xen queries

[Vijay Kilari <vijay.kilari@xxxxxxxxx>]

On Tue, Jul 15, 2014 at 2:16 PM, Ian Campbell <Ian.Campbell@xxxxxxxxxx> wrote:
> On Tue, 2014-07-15 at 14:14 +0530, Vijay Kilari wrote:
>> > BTW, is there any reason to not use copy_{from,to}_guest helpers?
>>
>>   What Xen has is IPA address of Command Queue. Can copy_{from,to}_guest()
>> work with guest IPA address?
>
> No, they use guest VAs.
>
> That's not to say that some helpers for copying from guest IPA wouldn't
> be a useful addition to Xen though.

   I understand that this helper uses map_domain_page() to do so.

Query: Is there any existing helpers to convert guest IPA to PA?. I want
to access the physical address for a given IPA and program the device with PA.

Regards,
Vijay

Note: Subject changed

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel