From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stefan Bauer <stefan.bauer@cubewerk.de>
Subject: Re: iommu: mapping reserved region failed - Q35 -VT-DIssue
Date: Fri, 31 Oct 2008 15:32:04 +0100
Message-ID: <490B16E4.2060604@cubewerk.de>
References: <49089D18.4030405@cubewerk.de><409D32C55C48D34DB5E31C8AB29EB15B071C6E25@FTLPEXCH05.citrite.net><4908B669.7080108@cubewerk.de><409D32C55C48D34DB5E31C8AB29EB15B071C6E74@FTLPEXCH05.citrite.net>	<4908BC3C.3070307@cubewerk.de>	<409D32C55C48D34DB5E31C8AB29EB15B071C6EA7@FTLPEXCH05.citrite.net>	<4908C6FC.9030307@cubewerk.de>	<715D42877B251141A38726ABF5CABF2C018686CF47@pdsmsx503.ccr.corp.intel.com>	<49096151.8090500@cubewerk.de>	<715D42877B251141A38726ABF5CABF2C018686D126@pdsmsx503.ccr.corp.intel.com>	<49098860.9050309@cubewerk.de>	<715D42877B251141A38726ABF5CABF2C018686D17B@pdsmsx503.ccr.corp.intel.com>	<4909C811.9070105@cubewerk.de>	<715D42877B251141A38726ABF5CABF2C018686D23C@pdsmsx503.ccr.corp.intel.com>
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Han, Weidong schrieb:
>      if ( !drhd )
> +    {
> +        printk("%s: can't find drhd for device (bus=%x dev=%x func=%x)\n",
> +                __func__, bus, PCI_SLOT(devfn), PCI_FUNC(devfn));
>          return -ENODEV;
> +    }
> 
> and you also can change XENLOG_INFO to XENLOG_ERR in domain_context_mapping(). 

Added and recompiled, output here:

www.plzk.de/CAPTURE2

> A few months ago,  in xen mailing list I remember some guys reported: when using PEG card (turning off integrated Gfx) on Q35, VT-d cannot work. It's the bios issue. I suspect it's not fixed yet. So I suggest you to use IGD instead of PEG.

I would, but if i do not select PEG in bios, lspci did not show the
PEG card.

Stefan