Xen devel - Apr 2005 - Hardcoded PAGE_OFFSET in head.S

hi,

in kernel/head.S, I see the following:

.section __xen_guest
    .ascii
"GUEST_OS=linux,GUEST_VER=2.6,XEN_VER=3.0,VIRT_BASE=0xC0000000"
                                           ^^^^^^^^^^^^^^^^^^^^
I wonder why setting VIRT_BASE here is necessary, as the ELF header 
should contain this information already?

thanks,
Jacob

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On 5 Apr 2005, at 00:25, Jacob Gorm Hansen wrote:
> in kernel/head.S, I see the following:
>
> .section __xen_guest
>    .ascii
> "GUEST_OS=linux,GUEST_VER=2.6,XEN_VER=3.0,VIRT_BASE=0xC0000000"
>                                           ^^^^^^^^^^^^^^^^^^^^
> I wonder why setting VIRT_BASE here is necessary, as the ELF header 
> should contain this information already?
The load and entry address is c0100000, but we want to map memory from 
c0000000 to better match the layout of native Linux (where the kernel 
appears at phys address 1MB).

  -- Keir


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