Re: [Xen-devel] [RFC PATCH 01/12] libacpi: new DSDT ACPI table for Q35

["Tian, Kevin" <kevin.tian@xxxxxxxxx>]

> From: Alexey G [mailto:x1917x@xxxxxxxxx]
> Sent: Tuesday, March 13, 2018 5:20 AM
> 
> On Mon, 12 Mar 2018 16:32:27 -0400
> Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> wrote:
> 
> >On Tue, Mar 13, 2018 at 06:10:35AM +1000, Alexey G wrote:
> >> On Mon, 12 Mar 2018 15:38:03 -0400
> >> Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> wrote:
> >>
> >> >On Tue, Mar 13, 2018 at 04:33:46AM +1000, Alexey Gerasimenko
> >> >wrote:
> >> >> This patch adds the DSDT table for Q35 (new
> >> >> tools/libacpi/dsdt_q35.asl file). There are not many differences
> >> >> with dsdt.asl (for i440) at the moment, namely:
> >> >>
> >> >> - BDF location of LPC Controller
> >> >> - Minor changes related to FDC detection
> >> >> - Addition of _OSC method to inform OSPM about PCIe features
> >> >> supported
> >> >>
> >> >> As we are still using 4 PCI router links and their corresponding
> >> >> device/register addresses are same (offset 0x60), no need to
> >> >> change PCI routing descriptions.
> >> >>
> >> >> Also, ACPI hotplug is still used to control passed through device
> >> >> hot (un)plug (as it was for i440).
> >> >>
> >> >> Signed-off-by: Alexey Gerasimenko <x1917x@xxxxxxxxx>
> >> >> ---
> >> >>  tools/libacpi/dsdt_q35.asl | 551
> >> >> +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed,
> 551
> >> >> insertions(+) create mode 100644 tools/libacpi/dsdt_q35.asl
> >> >>
> >> >> diff --git a/tools/libacpi/dsdt_q35.asl
> >> >> b/tools/libacpi/dsdt_q35.asl new file mode 100644
> >> >> index 0000000000..cd02946a07
> >> >> --- /dev/null
> >> >> +++ b/tools/libacpi/dsdt_q35.asl
> >> >> @@ -0,0 +1,551 @@
> >> >>
> +/************************************************************
> ******************
> >> >> + * DSDT for Xen with Qemu device model (for Q35 machine)
> >> >> + *
> >> >> + * Copyright (c) 2004, Intel Corporation.
> >> >> + *
> >> >> + * This program is free software; you can redistribute it and/or
> >> >> modify
> >> >> + * it under the terms of the GNU Lesser General Public License as
> >> >> published
> >> >> + * by the Free Software Foundation; version 2.1 only. with the
> >> >> special
> >> >> + * exception on linking described in file LICENSE.
> >> >
> >> >I don't see the 'LICENSE' file in Xen's directory?
> >> >
> >> >Also, your email does not seem to be coming from Intel, so I have to
> >> >ask, where did this file originally come from?
> >>
> >> It's basically Xen's dsdt.asl with some modifications related to Q35.
> >> Currently only few modifications needed, but in the future dsdt.asl
> >> and dsdt_q35.asl will diverge more from each other -- that's the
> >> reason why a separate file was forked instead applying these changes
> >> to dsdt.asl directly, for example, as #ifdef-parts.
> >
> >OK, as such you should make a seperate patch that adds this file (and
> >be completly unmodified) and make sure you CC Intel folks (Kevin, et
> >all) so they can Ack it.
> 
> Kevin -- I assume you mean Kevin Tian <kevin.tian@xxxxxxxxx>? Cc'ing
> him.
> Please let me know other persons from Intel who are also responsible,
> the MAINTAINERS file doesn't tell much about Intel people
> regarding /libacpi, unfortunately.

I'm not the maintainer of libacpi (should be Jan?). But CC my
colleague (Chao Peng) here who did some study of Q35 support
before and can help review.

Thanks
Kevin

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