From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from eggs.gnu.org ([2001:4830:134:3::10]:37667)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <lersek@redhat.com>) id 1XVprL-0000vB-P7
	for qemu-devel@nongnu.org; Sun, 21 Sep 2014 18:44:05 -0400
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <lersek@redhat.com>) id 1XVprF-0003Dr-Kc
	for qemu-devel@nongnu.org; Sun, 21 Sep 2014 18:43:59 -0400
Received: from mx1.redhat.com ([209.132.183.28]:32838)
	by eggs.gnu.org with esmtp (Exim 4.71)
	(envelope-from <lersek@redhat.com>) id 1XVprF-00035a-DC
	for qemu-devel@nongnu.org; Sun, 21 Sep 2014 18:43:53 -0400
Message-ID: <541F5493.20508@redhat.com>
Date: Mon, 22 Sep 2014 00:43:31 +0200
From: Laszlo Ersek <lersek@redhat.com>
MIME-Version: 1.0
References: <20140915145005.GM1825@ERROL.INI.CMU.EDU>
	<5416FF41.7010800@redhat.com>
	<20140915150754.GO1825@ERROL.INI.CMU.EDU>
	<5417299C.7020107@redhat.com>
	<20140921221055.GB1695@ERROL.INI.CMU.EDU>
In-Reply-To: <20140921221055.GB1695@ERROL.INI.CMU.EDU>
Content-Type: text/plain; charset=windows-1252
Content-Transfer-Encoding: 7bit
Subject: Re: [Qemu-devel] OVMF, Q35 and USB keyboard/mouse
List-Id: <qemu-devel.nongnu.org>
List-Unsubscribe: <https://lists.nongnu.org/mailman/options/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>
List-Archive: <http://lists.nongnu.org/archive/html/qemu-devel>
List-Post: <mailto:qemu-devel@nongnu.org>
List-Help: <mailto:qemu-devel-request@nongnu.org?subject=help>
List-Subscribe: <https://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=subscribe>
To: "Gabriel L. Somlo" <gsomlo@gmail.com>
Cc: edk2-devel@lists.sourceforge.net, agraf@suse.de, qemu-devel@nongnu.org, Gerd Hoffmann <kraxel@redhat.com>, reza.jelveh@tuhh.de, Paolo Bonzini <pbonzini@redhat.com>

On 09/22/14 00:10, Gabriel L. Somlo wrote:

> dmsg_bios.log: ACPI: PCI Interrupt Link [LNKA] (IRQs 5 *10 11)
> dmsg_bios.log: ACPI: PCI Interrupt Link [LNKB] (IRQs 5 *10 11)
> dmsg_bios.log: ACPI: PCI Interrupt Link [LNKC] (IRQs 5 10 *11)
> dmsg_bios.log: ACPI: PCI Interrupt Link [LNKD] (IRQs 5 10 *11)
> dmsg_bios.log: ACPI: PCI Interrupt Link [LNKE] (IRQs 5 *10 11)
> dmsg_bios.log: ACPI: PCI Interrupt Link [LNKF] (IRQs 5 *10 11)
> dmsg_bios.log: ACPI: PCI Interrupt Link [LNKG] (IRQs 5 10 *11)
> dmsg_bios.log: ACPI: PCI Interrupt Link [LNKH] (IRQs 5 10 *11)
> 
> dmsg_ovmf.log: ACPI: PCI Interrupt Link [LNKA] (IRQs 5 10 11) *0, disabled.
> dmsg_ovmf.log: ACPI: PCI Interrupt Link [LNKB] (IRQs 5 10 11) *0, disabled.
> dmsg_ovmf.log: ACPI: PCI Interrupt Link [LNKC] (IRQs 5 10 11) *0, disabled.
> dmsg_ovmf.log: ACPI: PCI Interrupt Link [LNKD] (IRQs 5 10 11) *0, disabled.
> dmsg_ovmf.log: ACPI: PCI Interrupt Link [LNKE] (IRQs 5 10 11) *0, disabled.
> dmsg_ovmf.log: ACPI: PCI Interrupt Link [LNKF] (IRQs 5 10 11) *0, disabled.
> dmsg_ovmf.log: ACPI: PCI Interrupt Link [LNKG] (IRQs 5 10 11) *0, disabled.
> dmsg_ovmf.log: ACPI: PCI Interrupt Link [LNKH] (IRQs 5 10 11) *0, disabled.

I mentioned earlier that grepping OvmfPkg for PCI_LIB_ADDRESS would be
necessary. See PciInitialization() in
"OvmfPkg/Library/PlatformBdsLib/BdsPlatform.c".

  //
  // Bus 0, Device 1, Function 0 - PCI to ISA Bridge
  //
  PciWrite8 (PCI_LIB_ADDRESS (0, 1, 0, 0x3c), 0x00);
  PciWrite8 (PCI_LIB_ADDRESS (0, 1, 0, 0x60), 0x0b); // LNKA routing target
  PciWrite8 (PCI_LIB_ADDRESS (0, 1, 0, 0x61), 0x0b); // LNKB routing target
  PciWrite8 (PCI_LIB_ADDRESS (0, 1, 0, 0x62), 0x0a); // LNKC routing target
  PciWrite8 (PCI_LIB_ADDRESS (0, 1, 0, 0x63), 0x0a); // LNKD routing target

This is not appropriate for q35. See "ICH9 PCI to ISA irq remapping" in
qemu's "q35-acpi-dsdt.dsl" file, vs. "PIIX PCI to ISA irq remapping" in
"acpi-dsdt.dsl".

The above was added in 05c89c7f.

Thanks
Laszlo