[Xen-ia64-devel] Re: [GFW PATCH] HVM DSDT fixes

[tgingold@xxxxxxx]

Quoting Alex Williamson <alex.williamson@xxxxxx>:

> Hi Tristan,

> There's still a lot of
> legacy devices in the DSDT that I'd like to remove (both of the
> motherboard resource devices, the PIC, DMA0, TMR, RTC, SPKR, and FDC0).
> Do any of these need to be in the system?

PIC can be definitely removed.
TMR (8254) is used by the GFW although itm should be used instead.
RTC is also used by the GFW.
SPKR can be removed (I suppose)
FDC0+DMA0 could be removed or not.

IMHO if a device is removed from the ssdt it should also be removed from
qemu emulation.

> BTW, the README for updating dsdt.c looks rather irrelevant to the GFW
Yes, it comes from Xen.

> build.  I've been using the following steps to build it:
>         iasl -p foo -tc dsdt.asl
>         tail --lines=1 dsdt.c >> foo.hex
>         cp foo.hex dsdt.c
> The tail just pulls over DsdtLen.  Is this correct?
Yes, it is.

>  Is there an easier way?
Well, we should modify the integration: iasl should produce an .h file which
is included by a c file.  Will be easier.
I think there is a support of .asl in Tiano build but I never used it.

Tristan.

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