From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from [140.186.70.92] (port=60729 helo=eggs.gnu.org)
	by lists.gnu.org with esmtp (Exim 4.43) id 1PV3ha-0001xM-Od
	for qemu-devel@nongnu.org; Tue, 21 Dec 2010 10:00:37 -0500
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <avi@redhat.com>) id 1PV3Xd-00084B-Ha
	for qemu-devel@nongnu.org; Tue, 21 Dec 2010 09:50:18 -0500
Received: from mx1.redhat.com ([209.132.183.28]:34695)
	by eggs.gnu.org with esmtp (Exim 4.71)
	(envelope-from <avi@redhat.com>) id 1PV3Xd-000847-Ab
	for qemu-devel@nongnu.org; Tue, 21 Dec 2010 09:50:17 -0500
Message-ID: <4D10BEA3.4010404@redhat.com>
Date: Tue, 21 Dec 2010 16:50:11 +0200
From: Avi Kivity <avi@redhat.com>
MIME-Version: 1.0
References: <20101208171136.GA10213@amt.cnet> <20101220170917.GA30684@amt.cnet>
	<20101221144145.GB7315@amt.cnet>
In-Reply-To: <20101221144145.GB7315@amt.cnet>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Subject: [Qemu-devel] Re: PATCH: document QEMU<->ACPIBIOS PCI hotplug
	interface (v2)
List-Id: qemu-devel.nongnu.org
List-Unsubscribe: <http://lists.nongnu.org/mailman/listinfo/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: <http://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=subscribe>
To: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Blue Swirl <blauwirbel@gmail.com>, qemu-devel@nongnu.org, Gleb Natapov <gleb@redhat.com>

On 12/21/2010 04:41 PM, Marcelo Tosatti wrote:
> Document how QEMU communicates with ACPI BIOS
> for PCI hotplug.
>
> Signed-off-by: Marcelo Tosatti<mtosatti@redhat.com>
>
> --- /dev/null	2010-12-14 09:23:48.414180082 -0200
> +++ qemu/docs/specs/acpi_pci_hotplug.txt	2010-12-20 15:00:26.000000000 -0200
> @@ -0,0 +1,39 @@
> +QEMU<->ACPI BIOS PCI hotplug interface
> +--------------------------------------
> +
> +QEMU supports PCI hotplug via ACPI, for PCI bus 0. This document
> +describes the interface between QEMU and the ACPI BIOS.
> +
> +ACPI GPE block (IO ports 0xafe0-0xafe3):
> +-----------------------------------------
> +
> +Generic ACPI GPE block. Bit 1 (GPE.1) used to notify PCI hotplug/eject
> +event to ACPI BIOS, via SCI interrupt.
> +
> +PCI slot injection notification pending (IO port 0xae00-0xae03):
> +---------------------------------------------------------------
> +Slot injection notification pending. One bit per slot.
> +
> +Read by ACPI BIOS GPE.1 handler to notify OS of injection
> +events.
> +
> +PCI slot removal notification (IO port 0xae04-0xae07):
> +-----------------------------------------------------
> +Slot removal notification pending. One bit per slot.
> +
> +Read by ACPI BIOS GPE.1 handler to notify OS of removal
> +events.
> +
> +PCI device eject (IO port 0xae08-0xae0b):
> +----------------------------------------
> +
> +Used by ACPI BIOS _EJ0 method to request device removal. One bit per slot.
> +Reads return 0.
> +
> +PCI removability status (IO port 0xae0c-0xae0f):
> +-----------------------------------------------
> +
> +Used by ACPI BIOS _RMV method to indicate removability status to OS. One
> +bit per slot.
> +
> +

Do we support byte and word access to those ports, or just dword access?

With this documentation, I'm fine with the _RMV DSDT patch.

-- 
error compiling committee.c: too many arguments to function