Re: [PATCH for-4.19? 0/2] xen/x86: support foreign mappings for HVM

[Oleksii <oleksii.kurochko@xxxxxxxxx>]

Hi Roger,

On Tue, 2024-04-30 at 18:58 +0200, Roger Pau Monne wrote:
> Hello,
> 
> The following series attempts to solve a shortcoming of HVM/PVH
> guests
> with the lack of support for foreign mappings.  Such lack of support
> prevents using PVH based guests as stubdomains for example.
> 
> Add support in a way similar to how it was done on Arm, by iterating
> over the p2m based on the maximum gfn.
> 
> Mostly untested, sending early in case it could be considered for
> 4.19.
In case of it will be properly tested I think we can consider this
patch as a candidate for 4.19

~ Oleksii

> 
> Thanks, Roger.
> 
> Roger Pau Monne (2):
>   xen/x86: account for max guest gfn and number of foreign mappings
> in
>     the p2m
>   xen/x86: remove foreign mappings from the p2m on teardown
> 
>  CHANGELOG.md                   |  1 +
>  xen/arch/x86/domain.c          |  6 +++
>  xen/arch/x86/include/asm/p2m.h | 28 ++++++++++----
>  xen/arch/x86/mm/p2m.c          | 70
> ++++++++++++++++++++++++++++++++--
>  4 files changed, 94 insertions(+), 11 deletions(-)
>