Re: [Xen-devel] [PATCH] support HVM guests with more than 3.75G memory

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

Hi Xin,

This patch seems to mess with the e820 logic quite a bit, in particular
adding some extra entries. What's going on there -- is it all just a 'clean
up' or are there real changes going on in that section of the patch?

 -- Keir

On 10/8/06 10:51 am, "Li, Xin B" <xin.b.li@xxxxxxxxx> wrote:

> support HVM guests with more than 3.75G memory.
> Changes are:
> 1) M2P table and e820 table are changed to skip address space from
> HVM_RAM_LIMIT_BELOW_4G to 4G.
> 2) shared io page location, when less than HVM_RAM_LIMIT_BELOW_4G
> memory, it's the last page of RAM as today, or it's the last page of
> HVM_RAM_LIMIT_BELOW_4G RAM.
> 3) in qemu-dm address space from HVM_RAM_LIMIT_BELOW_4G to 4G are
> stuffed with mfns starting from 4G, so the 1:1 mapping can still works.
> This is ugly, but another limit check patch as changeset 10757 will
> prevent qemu-dm to access this range.  This ugly stuffing will be
> removed when the patch to remove 1:1 mapping from qemu-dm gets accepted
> in the future.



_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel