Re: [Xen-users] HOWTO pass apcitable parameter to qemu-system-x86_64 in Xen HVM domU

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Fri, 2014-12-26 at 23:29 +0800, John Mok wrote:
> Hello Mark,
> 
> Thank you for your prompt advice.
> 
> I tried several ways,
> 
> adding device_model_args = ['-acpitable', '/etc/xen/slic.hex' ] to
> /etc/xen/xl.conf and /etc/xen/domU.cfg,
> 
> but I checked from the Windows HVM domU and it failed to read to the
> pass-in SLIC table (as it did without adding the device_model_args)
> 
> Any idea why the domU could not receive and override the -acpitable
> parameter to /usr/bin/qemu-system-x86_64?

Under Xen qemu is not responsible for providing the ACPI tables to the
guest, these come from hvmloader, hence acpitable has no affect under
Xen.

Instead you can try using the acpi_firmware option in your guest cfg
(/etc/xen/domU.cfg, not xl.conf). Looks like this was added in Xen 4.3.
See the xl.cfg manpage for more info.

Ian.


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