Re: [Xen-devel] A couple of HVMlite loose ends

[Juergen Gross <jgross@xxxxxxxx>]

On 13/01/16 17:01, Roger Pau Monné wrote:
> El 13/01/16 a les 16.56, Juergen Gross ha escrit:
>> On 13/01/16 16:49, Roger Pau Monné wrote:
>>>  b) Setting up the initial MTRR state from libxl/libxc for HVMlite DomU
>>> and from the Xen domain builder for HVMlite Dom0. This again implies
>>> some functional duplication of MTRR related code, since now we would
>>> have 3 different places where MTRR is setup. One inside hvmloader for
>>> classic HVM guests, another one inside of libxl/libxc for HVMlite DomU
>>> and yet another one in the Dom0 building for HVMlite Dom0.
> 
> Moving the code to xen/common/lib<blah> is not suitable in this case (or
> so I think), because hvmloader runs inside of the guest (just like a
> regular BIOS firmware), while we would need to do this from the outside
> for HVMlite guests (using mtrr_def_type_msr_set, mtrr_fix_range_msr_set
> and mtrr_var_range_msr_set).

Have a look how xen/common/libelf is being used from libxc and the
hypervisor. It is just code included via make instead of duplicating it
on source level.


Juergen


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