Re: [Xen-devel] [PATCH v1 00/20] Make ACPI builder available to components other than hvmloader

[Roger Pau Monné <roger.pau@xxxxxxxxxx>]

Hello,

Thanks for the refresh! Do you have this series in some git tree I can pull 
from?

On Tue, Jul 05, 2016 at 03:04:59PM -0400, Boris Ostrovsky wrote:
> This is V1 of the series posted earlier as an RFC
> 
> The goal here is to build ACPI tables for PVHv2/HVMlite guests while reusing 
> existing
> hvmloader's ACPI builder code. The builder is provided as a library in 
> tools/libacpi.
> 
> Main changes from RFC are:
> * Move toolstack code that loads the tables into PVHv2 guest from libxc to 
> libxl
> * Don't provide the builder to hypervisor as we didn't find a user for that 
> (at least so far)
> * Update e820 map for PVHv2 guests when ACPI tables are loaded
> * Don't set HW_REDUCED_ACPI flags: this flag is only available starting with 
> ACPI v5

Hm, I still think HW_REDUCED_ACPI should be set for the time being, 
considering that we don't provide PM timer or RTC for example. Not setting 
this would be a violation of the ACPI specification, and would mean 
introducing Xen specific hacks yet again to guest OSes, in order to disable 
those devices.

Is the fact that HW_REDUCED_ACPI was introduced in ACPI v5 a problem?

Roger.

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