From mboxrd@z Thu Jan  1 00:00:00 1970
From: Paolo Bonzini <pbonzini@redhat.com>
Subject: Re: [v5][PATCH 0/5] xen: add Intel IGD passthrough
	support
Date: Wed, 25 Jun 2014 12:14:16 +0200
Message-ID: <53AAA0F8.8090007@redhat.com>
References: <20140625083121.GC32652@redhat.com> <53AA8ACF.3070101@redhat.com>
	<20140625084835.GF32652@redhat.com> <53AA8E7D.809@intel.com>
	<20140625090925.GH32652@redhat.com>
	<53AA9480.1010005@intel.com> <53AA96DF.6070501@redhat.com>
	<53AA9B58.6050803@intel.com> <20140625095533.GE6357@redhat.com>
	<53AA9D79.3080003@redhat.com> <20140625100926.GH6357@redhat.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Return-path: <qemu-devel-bounces+gceq-qemu-devel=gmane.org@nongnu.org>
In-Reply-To: <20140625100926.GH6357@redhat.com>
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>
Errors-To: qemu-devel-bounces+gceq-qemu-devel=gmane.org@nongnu.org
Sender: qemu-devel-bounces+gceq-qemu-devel=gmane.org@nongnu.org
To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: peter.maydell@linaro.org, xen-devel@lists.xensource.com, stefano.stabellini@eu.citrix.com, allen.m.kay@intel.com, Kelly.Zytaruk@amd.com, qemu-devel@nongnu.org, anthony.perard@citrix.com, anthony@codemonkey.ws, yang.z.zhang@intel.com, "Chen, Tiejun" <tiejun.chen@intel.com>
List-Id: xen-devel@lists.xenproject.org

Il 25/06/2014 12:09, Michael S. Tsirkin ha scritto:
>> > It's not just a couple of IDs, it's also random fields of the MCH
>> > configuration space.  Grep drivers/gpu/drm/i915 for bridge_dev.
>> >
>> > Paolo
> I did, it seems to look for device at 0,0:
>
> 	static int i915_get_bridge_dev(struct drm_device *dev)
> 	{
> 		struct drm_i915_private *dev_priv = dev->dev_private;
>
> 		dev_priv->bridge_dev = pci_get_bus_and_slot(0, PCI_DEVFN(0, 0));
> 		if (!dev_priv->bridge_dev) {
> 			DRM_ERROR("bridge device not found\n");
> 			return -1;
> 		}
> 		return 0;
> 	}
>
> are you sure this is the ISA bridge device? these patches put it at 1f.
>

For the PCH it's just the ids, but there are also accesses to the MCH 
config space.

Paolo