RE: [Xen-devel] [PATCH] Intel(R) Trusted Execution Technology support

["Cihula, Joseph" <joseph.cihula@xxxxxxxxx>]

On Monday, October 29, 2007 10:52 AM, Keir Fraser wrote:
> On 29/10/07 17:41, "Cihula, Joseph" <joseph.cihula@xxxxxxxxx> wrote:
> 
>>> Why is the memory region not marked as E820_UNUSABLE by tboot?
And/or extend
>>> the multiboot info structure and transmit the address of the shared
page
>>> that way.
>> 
>> I didn't mark it as UNUSABLE because dom0 doesn't like low memory
that
>> it can't probe and I didn't realize that there would be a problem
with
>> marking it RESERVED.  However, I can mark it as UNUSABLE and then
when I
>> find it, change it to RESERVED.  I'll send a patch for this as well.
> 
> By low memory, do you mean the signature is in the bottom megabyte of
> memory? If that's guaranteed then can we just scan the whole lot
> 0x00000-0xfffff (excluding VGA hole)?

Yes, it's in the lower 1MB and that is where dom0 has problems with
gaps.  But I think that the UNUSABLE->RESERVED approach will be just as
effective and reduce the amount of memory to scan as well.

Joe

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