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xen-devel
Re: [Xen-devel] [PATCH] new hvm platform vhpet enable parameter
On 7/2/08 18:29, "Dan Magenheimer" <dan.magenheimer@xxxxxxxxxx> wrote:
>> HPET is also advertised in the ACPI tables which would need
>> to be gated.
>
> Could you point me in the right direction? I see that a Linux
> hvm kernel still prints a line indicating it has discovered
> an HPET in the ACPI tables, but I couldn't find anything in
> hvm code that would turn that off, and I just want to turn off
> HPET per guest, not for Xen and all guests.
Yes, tools/firmware/hvmloader/acpi/dsdt.asl. The right way to do this will
be to gate it on a flag set up in memory by hvmloader (we already do this
e.g., for com1 and com2 -- see construct_bios_info_table() in build.c in the
same directory). That might be a bit tricky as it probably needs a bit of
ASL hacking, which has a little learning curve. I can take a look maybe next
week.
-- Keir
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