Re: [Xen-devel] [PATCH v16 5/9] x86: change default load address from 1 MiB to 2 MiB

[Daniel Kiper <daniel.kiper@xxxxxxxxxx>]

On Wed, Mar 01, 2017 at 02:05:39AM -0700, Jan Beulich wrote:
> >>> On 21.02.17 at 20:19, <daniel.kiper@xxxxxxxxxx> wrote:
> > Subsequent patches introducing relocatable early boot code play with
> > page tables using 2 MiB huge pages. If load address is not aligned at
> > 2 MiB then code touching such page tables must have special cases for
> > start and end of Xen image memory region. So, let's make life easier
> > and move default load address from 1 MiB to 2 MiB. This way page table
> > code will be nice and easy. Hence, there is a chance that it will be
> > less error prone too... :-)))
> >
> > Additionally, drop first 2 MiB mapping from Xen image mapping.
> > It is no longer needed.
>
> What about the memory allocated for it? Aiui at least in the xen.efi
> case there would be a 2Mb chunk left unused, but also never freed.

Memory is not allocated for it.

Daniel

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