Re: [Xen-devel] PVH Dom0 ACPI tables

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

On Thu, Feb 15, 2018 at 10:23:32AM -0700, Jan Beulich wrote:
> >>> On 15.02.18 at 17:59, <roger.pau@xxxxxxxxxx> wrote:
> > On Thu, Feb 15, 2018 at 03:05:03AM -0700, Jan Beulich wrote:
> >> >>> On 14.02.18 at 11:30, <roger.pau@xxxxxxxxxx> wrote:
> >> > Tables related to devices in use by Xen (or not available to Dom0)
> >> > 
> >> > HPET, DMAR, IVRS, WAET, CSRT, BOOT, MADT,
> >> 
> >> Why WAET, CSRT, and BOOT? I can't find Xen using any of these.
> > 
> > WAET contains information about devices not available to Dom0 (RTC and
> > ACPI PM timer).
> > 
> > CSRT is more of a grey area, it contains information about interrupt
> > controllers and timers, and those devices are likely not available to
> > Dom0.
> > 
> > BOOT contains an offset into the CMOS, which is not available to Dom0.
> 
> CMOS and RTC are usable by Dom0, aren't they?

Sure, I was confused with DomU which of course doesn't have RTC/CMOS.
Dom0 should be able to access the RTC/CMOS from the IO space.

BOOT should be fine to pass through to Dom0.

Roger.

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