Re: [Xen-devel] [PATCH v11 6/9] xen: Add ring 3 vmware_port support

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 12.06.15 at 00:10, <dslutz@xxxxxxxxxxx> wrote:
> On 06/05/15 06:54, Ian Campbell wrote:
>> It would be really useful to see a comprehensive list of exactly what
>> guest ring3 access to the vmware port actually enables i.e. a list of
>> specific features which require it.
> 
> Ok, I have done some testing.  Here is what I know:
> 
> Without ring3 support:
> 
> 1) VMware tools will not install on linux and windows.
> 2) open-vm-tools (https://github.com/vmware/open-vm-tools) will not
> install (how ever it is not hard to change it to do so, you need to add
> a call to iopl(3) need to be added in a few places) on linux
> 
> However if VMware tools did get installed on the window disk bits
> somehow, the VMware mouse support works.  Linux gets this because Xorg
> detects and uses the VMware mouse under IOPL(3).

Now that tells us that the tools may not work, but not what
implications that has on the usability of the VM once migrated
to Xen. Them not installing is a non-issue afaict, since after
having moved the VM to Xen there shouldn't be a need to
install them anymore - either they've been there, or I don't
see why they would be needed _after_ the move. And you
say that the mouse works in both cases if the tools happen
to be there.

Jan


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