Re: [Xen-devel] [PATCH v6] altp2m: Introduce external-only and limited use-cases

[George Dunlap <george.dunlap@xxxxxxxxxx>]

On 05/04/17 18:41, Tamas K Lengyel wrote:
> On Wed, Apr 5, 2017 at 9:04 AM, George Dunlap <george.dunlap@xxxxxxxxxx> 
> wrote:
>> On Tue, Apr 4, 2017 at 4:24 PM, Tamas K Lengyel
>> <tamas.lengyel@xxxxxxxxxxxx> wrote:

>> "mixed"
>>
>> Both external domains and the guest itself have full access to altp2m
>> functionality
>>
>> "limited"
>>
>> External domains have access to full altp2m functionality; guest has
>> access only to HVMOP_altp2m_vcpu_enable_notify (ability to enable
>> VMFUNC and #VE features).
[snip]
>> Out of curiosity, what's the use case of the "mixed" mode?
> 
> It's not entirely clear but that has been the mode that it was introduced 
> with.

Actually I had some sort of a weird typo there... What I meant to ask
about was actually "limited" mode: if the guest can't modify its own p2m
tables, what's the use of a #VE?

(Again, no objections to the patch, just curious.)

 -George

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