Hello Hal For a bit more on the PCI BAR, see this:
http://docs.sun.com/app/docs/doc/819-3196/6n5ed4hmv?a=view Every PCI device has these registers that give the base address/range of its registers. It seems these ranges don't match those in DMAR. It makes sense SINIT would/could check this. Best regards, Martin Thiim On Thu, Jul 30, 2009 at 10:07 PM, Martin Thiim<mar...@thiim.net> wrote: > Hello Hal > > I could be wrong, but I think what the "Enable VT-d" option in the > BIOS really refers to is whether the BIOS should set up the ACPI > tables related to VT-d. > > You could use acpidump to see if those tables contain anything VT-d > related (DMAR and the like) - the VT-d spec would be helpful for this. > > http://download.intel.com/technology/computing/vptech/Intel(r)_VT_for_Direct_IO.pdf > > I currently don't have access to my VT-d system so I can't give you a > table of what it looks like on my machine but perhaps others could. > > Best regards, > > Martin Thiim > > On Thu, Jul 30, 2009 at 7:28 PM, Hal Finney<hal.fin...@gmail.com> wrote: >> Hi Shane - I'm not sure what it would do to add these switches, since >> tboot doesn't get as far as launching the kernel, since it hangs in >> SENTER. However I can try doing it and then just booting into the >> kernel, in case I get any error reports about VT-d. >> >> Are there any MSRs or other registers I can patch tboot to dump out, >> to indicate whether VT-d is turned on? >> >> My HP dc7800 was one of the very first commercially released systems >> to support TXT. I bought one as soon as they became available in order >> to experiment with this technology. It has an E6550 "Conroe" processor >> with a Q35 "Bearlake" chipset. >> >> Hal >> >> On Thu, Jul 30, 2009 at 12:24 AM, Shane Wang<shane.w...@intel.com> wrote: >>> Hal, >>> >>> If you work with Xen, please try to add "iommu=1 vtd=1" in Xen command line >>> (i.e. the end of "module /boot/xen.gz ...") >>> If you work with Linux, please try to add "iommu=on" in the command >>> line (i.e. the end of "module /boot/vmlinuz-2.6.30 ..." >>> >>> PS: do you know which platform HP dc7800 is? *Field or *Dale? >>> Can you see VTd lsoc (Azalia) WA in BIOS or somewhere? >>> >>> Thanks. >>> Shane >>> >>> Hal Finney wrote: >>>> >>>> Thanks for the reply, Shane. VT-d is enabled in the BIOS; in fact, the >>>> BIOS automatically enables VT-d when TXT is enabled. >>>> >>>> I don't know of anything I would do in any grub configuration file to >>>> enable VT-d for tboot and SINIT. Do you have any suggestions? >>>> >>>> Hal >>>> >>>> On Wed, Jul 29, 2009 at 10:04 PM, Shane Wang<shane.w...@intel.com> wrote: >>>>> >>>>> Hi Hal >>>>> >>>>> The error code means VTd is disabled. >>>>> Is your VT-d enabled in your new BIOS and grub.conf? >>>>> >>>>> Thanks. >>>>> Shane >>>>> >>>>> Hal Finney wrote: >>>>>> >>>>>> I haven't run tboot in a while, but I'm trying it on my HP dc7800 and >>>>>> finding it hangs in GETSEC[SENTER]. This is even true with old >>>>>> versions of tboot that used to work. My system has no USB ports >>>>>> plugged in, and no hardware changes. >>>>>> >>>>>> The one change is I recently updated my BIOS. I suspect this has to be >>>>>> the cause. One nice thing about the new BIOS is that the tboot hang >>>>>> actually reboots the machine with the ERRORCODE register intact. Its >>>>>> value is c00020a1. This is progress code 0ah, error code 1000, >>>>>> meaning: "device scope of VT-d DMAR ACPI table is invalid". Not clear >>>>>> what this means. >>>>>> >>>>>> My log is attached, including the hang and the relaunch of tboot. This >>>>>> is version 20090330 of tboot. Thanks very much - >>>>>> >>>>>> Hal Finney >>>>> >>> >>> >> >> ------------------------------------------------------------------------------ >> Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day >> trial. Simplify your report design, integration and deployment - and focus on >> what you do best, core application coding. Discover what's new with >> Crystal Reports now. http://p.sf.net/sfu/bobj-july >> _______________________________________________ >> tboot-devel mailing list >> tboot-devel@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/tboot-devel >> > ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ tboot-devel mailing list tboot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/tboot-devel
