Re: [Xen-devel] [PATCH v3 2/4] x86/compat: Test both PV and PVH guests for compat mode

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 11.08.15 at 19:21, <boris.ostrovsky@xxxxxxxxxx> wrote:
> On 08/11/2015 05:19 AM, Jan Beulich wrote:
>>>>> On 24.07.15 at 19:54, <boris.ostrovsky@xxxxxxxxxx> wrote:
>>> On 07/23/2015 10:07 AM, Jan Beulich wrote:
>>>> Plus - is this in line with what the tools are doing? Aren't they
>>>> assuming !PV <=> native format context? I.e. don't you need
>>>> to treat differently v->domain == current->domain and its
>>>> opposite? Roger btw. raised a similar question on IRC earlier
>>>> today...
>>> Not sure I understand this. You mean for copying 64-bit guest's info
>>> into 32-bit dom0?
>> Basically yes - tool stack and guest invocations may need to
>> behave differently.
> 
> This being PVH-"classic" it follows exactly the PV path (both in tools 
> and the hypervisor). Wouldn't PV be broken then as well?

Note that I raised a question originally (still seen above) instead
of asking for a specific change. In the end all I'm asking for is that
you make changes in the hypervisor in a way compaible with tools
expectations, or adjust the tools accordingly. And of course you
should keep in mind what "no-dm" will want (i.e. perhaps sync with
Roger), such that we don't end up with guest exposed interface
behavior not suitable for the long term targets we have.

Jan


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