Re: [Xen-devel] [RFC PATCH 00/84] Remove direct map from Xen

[Julien Grall <julien.grall@xxxxxxx>]

Hi,

Thank you for posting the series.

On 9/26/19 10:45 AM, hongyax@xxxxxxxxxx wrote:
> From: Hongyan Xia <hongyax@xxxxxxxxxx>
>
> Previously, Wei Liu has created the patch series to switch to
> alloc/map/unmap/free APIs for Xen page tables so that Xen page tables
> are mapped with map_domain_page(). This is the first step towards
> removing the direct map. I implemented patches on top of Wei's to remove
> the direct map completely.
>
> In addition to Wei's, my patches:
> - (Wei) implement a proper PMAP infrastructure for bootstrapping
> - remove direct map code in map_domain_page() and use mapcache, use PMAP
>   when mapcache not ready
> - map/unmap xenheap allocations to the direct map region so that va<->pa
>   macros still work
> - install dummy mappings (no permissions, INVALID_MFN) instead of actual
>   1:1 mappings during boot, so the direct map no longer exists
> - fix many places where code incorrectly assumes a direct map
I am a bit confused. Are your patches fixing bug from Wei's series?

> I have moderately tested the patches. I am able to boot into dom0,
> create/destroy PV/HVM guests and run XTF tests. Personally, I find it
> difficult to discover all places where it incorrectly assumes a direct
> map, so reviews and further testing are more than welcome.
Do you have a branch with this series applied?

Cheers,

--
Julien Grall

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxxx
https://lists.xenproject.org/mailman/listinfo/xen-devel