From mboxrd@z Thu Jan 1 00:00:00 1970 From: Weidong Han Subject: Re: Xen 4.0 + PVOPS + Intel VTD + USB EHCI = BUG() Date: Thu, 04 Feb 2010 09:59:29 +0800 Message-ID: <4B6A2A01.1010206@intel.com> References: <20100122221231.GA32286@phenom.dumpdata.com> <20100126144212.GA10928@phenom.dumpdata.com> <1264524172.20158.82.camel@moss-terrapins.epoch.ncsc.mil> <20100126165724.GA13847@phenom.dumpdata.com> <1264527964.20158.87.camel@moss-terrapins.epoch.ncsc.mil> <20100126181949.GA14346@phenom.dumpdata.com> <1264534209.20881.5.camel@moss-terrapins.epoch.ncsc.mil> <20100126194621.GC2861@reaktio.net> <1264537282.20881.6.camel@moss-terrapins.epoch.ncsc.mil> <60E426D47DE8EA47AA104E65008A100D15B4215130@shzsmsx501.ccr.corp.intel.com> <1264618093.20881.9.camel@moss-terrapins.epoch.ncsc.mil> <60E426D47DE8EA47AA104E65008A100D15BB64342C@shzsmsx501.ccr.corp.intel.com> <1264695015.20881.17.camel@moss-terrapins.epoch.ncsc.mil> <60E426D47DE8EA47AA104E65008A100D162187B7EE@shzsmsx501.ccr.corp.intel.com> <1265060140.20881.39.camel@moss-terrapins.epoch.ncsc.mil> <4B68E8A5.6030405@intel.com> <1265215113.20881.76.camel@moss-terrapins.epoch.ncsc.mil> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: <1265215113.20881.76.camel@moss-terrapins.epoch.ncsc.mil> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: "David P. Quigley" Cc: Konrad Rzeszutek Wilk , "xen-devel@lists.xensource.com" , Daniel Stodden List-Id: xen-devel@lists.xenproject.org David P. Quigley wrote: > On Wed, 2010-02-03 at 11:08 +0800, Weidong Han wrote: > =20 >> David P. Quigley wrote: >> =20 >>> On Sat, 2010-01-30 at 21:50 +0800, Han, Weidong wrote: >>> =20 >>> =20 >>>> It's so weird pvops dom0 still detects DMAR and enables it after zap= DMAR signature in Xen. Dom0 should not detect DMAR in ACPI after the sig= nature is zapped.=20 >>>> >>>> I suspect that your USB issue is caused by this. Pls have a try with= turn off VT-d in pvops config (# CONFIG_DMAR is not set) to see if it so= lves your issue. >>>> >>>> Regards, >>>> Weidong >>>> >>>> -----Original Message----- >>>> From: David P. Quigley [mailto:dpquigl@tycho.nsa.gov]=20 >>>> Sent: Friday, January 29, 2010 12:10 AM >>>> To: Han, Weidong >>>> Cc: Pasi K=C3=A4rkk=C3=A4inen; Daniel Stodden; xen-devel@lists.xenso= urce.com; Konrad Rzeszutek Wilk >>>> Subject: RE: [Xen-devel] Xen 4.0 + PVOPS + Intel VTD + USB EHCI =3D = BUG() >>>> >>>> I've attached the output from the patched xen hypervisor. I see the = message being printed out so it appears to be clearing the signature. >>>> >>>> Dave >>>> =20 >>>> =20 >>> So I managed to sucessfully book my pvops dom0 kernel with VT-D on in= my >>> bios when I turned off DMAR from the dom0 kernel config. Is there >>> anything else you would like me to do to help hunt this bug down? >>> >>> Dave >>> >>> =20 >>> =20 >> Could you dump ACPI in native Linux and Xen dom0? Let's see what=20 >> difference between "zap" and "no zap" DMAR signature. >> >> Regards, >> Weidong >> =20 > > Sure. How do I go about doing that? > > Dave > > =20 You can search and download acpidump. After install it, you can use=20 following command to dump acpi table: acpidump >acpidump.txt Dump acpi table on both native Linux and xen dom0, and post dump files. Regards, Weidong