Re: [Xen-devel] [PATCH] [HVM] [RFC] Moving the e820 table creation into hvmloader

[Stefan Berger <stefanb@xxxxxxxxxx>]

Keir Fraser <keir@xxxxxxxxxxxxx> wrote on 11/08/2006
06:08:03 PM:

> 
> 
> 
> On 8/11/06 10:35 pm, "Stefan Berger" <stefanb@xxxxxxxxxx>
wrote:

> > Is that to be marked as ACPI too? So we
can just tack it on the end 
> > of a big ACPI region at, say, 0xE0000? Frankly, for now, we can
just 
> 
> Yes, it has to be marked such that it's not claimed by an OS. 
> Probably it's the best to mark it as ACPI and put it into the same
> memory chunk as the rest of ACPI. 
> 
> I believe regions marked ACPI are allowed to be reclaimed by the OS
> after it has parsed the ACPI tables. So perhaps the log memory needs
> to be marked reserved, or not covered by an e820 region at all. 

Probably then 'reserved', although when I put it into
the ACPI area it worked. The driver that accesses that log will try to
map it every time one opens a sysfs file.

http://www.linux-m32r.org/lxr/http/source/drivers/char/tpm/tpm_bios.c?v=2.6.18#L386

  Stefan
> 
>  -- Keir
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