Re: [Xen-devel] Kernel panic with tboot E820_UNUSABLE region

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 14.05.13 at 16:33, Aurelien Chartier <aurelien.chartier@xxxxxxxxxx> 
>>> wrote:

With

> (XEN)  0000000000100000 - 0000000000800000 (usable)
> (XEN)  0000000000800000 - 0000000000975000 (unusable)
> (XEN)  0000000000975000 - 0000000020000000 (usable)
>...
> The region 0000000000975000 - 0000000020000000 has been set to unusable
> by tboot.

... you certainly mean the range 800000-975000.

> Calls to update_va_mapping show the following error messages (with mfn
> going from 800 to 974):
> 
> (XEN) mm.c:911:d0 Error getting mfn 800 (pfn 5555555555555555) from L1
> entry 0000000000800463 for l1e_owner=0, pg_owner=0

Yes, the kernel has no business mapping that region, and the
hypervisor rightly refuses the attempt.

Jan


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