Re: [Xen-devel] About booting Xen with UEFI on FastModel

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Fri, 2013-12-20 at 19:01 +0800, Chen Baozi wrote:
> On Dec 20, 2013, at 18:40, Ian Campbell <Ian.Campbell@xxxxxxxxxx> wrote:
> 
> > On Fri, 2013-12-20 at 16:50 +0800, Chen Baozi wrote:
> >> 2. This patch still cannot deal with the situation where [paddr, paddr+2M)
> >> and [vaddr, vaddr+2M) are overlapped but not aligned with the same size
> >> (e.g., paddr = 0x80000 & vaddr = 0x200000).
> > 
> > I think it ought to be possible in principal to make this work?
> 
> Iâm afraid not. Unless we donât have the identical 1:1 physical address
> mappings when booting, I think.

Ugh, yes.

> 
> Baozi
> 
> > 
> >> So I guess a 2MB aligned load address is required in boot protocol?
> > 
> > That would certainly be easiest from the Xen side, as it involves no
> > changes at all!
> > 
> > Ian
> > 
> 



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