[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Lenovo X200 IOMMU support through Xen 4.6 iommu=no-igfx switch
>>> On 22.12.15 at 19:04, <thierry.laurion@xxxxxxxxx> wrote: > iommu=no-igfx is a gamechanger for Qubes support through 3.1 RC1 release, > thanks to Xen 4.6 :) > > The Lenovo X200 supports vt-x, vt-d and TPM as reported and required by > Qubes in the HCL attached to this e-mail. The problem is that when Qubes > launches it's netvm which uses IOMMU to talk to it's network card, it > freezes the whole system up. Even when specifying sync_console, I don't get > much more verbosity. I ordered a PCMCIA to serial adapter which will be > shipped to my door late January... Meanwhile, booting with iommu=0 makes > things work, but a potential hardware component being compromised has > chances to compromise the whole system since compartmentalization is not > guaranteed without IOMMU (vt-d). > > A little more love is needed from xen to make that laptop line supported by > Qubes and a nice alternative to the costy Librem currently promoted by > Qubes-Purism > partnership Is all of the above and below a quite complicated way of expressing that you'd like to see commit 146341187a backported to 4.6.x? Jan > <http://arstechnica.com/gadgets/2015/12/qubes-os-will-ship-pre-installed-on-p > urisms-security-focused-librem-13-laptop/>which > suggest that the laptop will be Respect Your Freedom compliant in the > future with Intel participation in removing ME and AMT > <http://libreboot.org/faq/#intelme>, which is not guaranteed at all. > <http://www.phoronix.com/scan.php?page=news_item&px=Purism-Librem-Still-Blobbe > > d> > If Xen 4.6 can cooperate with Penryn GM45 chipset, it's all MiniFree laptops > <http://minifree.org/product-category/laptops/> (and Libreboot support of > those <http://libreboot.org/docs/hcl/x200.html>) that will be potential > candidates! > Please share the love so that the community has a cheap alternative. > > Requirements to replicate bug: > Model: X200 745434U with p8700 CPU running 1067a microcode(important), > upgrable to 8go > BIOS: Lenovo 3.22/1.07 (latest from 2013 > <http://support.lenovo.com/ca/en/downloads/ds015007>) > Network card supports FLReset+ as requested here > <http://wiki.xen.org/wiki/VTd_HowTo>. > Bios settings: vt-d and vt-x needs to be enforced. > Xen command line option required > <http://www.gossamer-threads.com/lists/xen/devel/393647> to boot: > iommu=no-igfx > > Here is the current debug trace/status on Qubes side of things > <https://groups.google.com/forum/#!topic/qubes-users/bHQHjXqinaU>. > If you have any hint, please contribute :) > > Help me say happy new years to all security conscious people out there :) > > Merry Christmas all, > Thierry Laurion > > > > > > -- > Thierry Laurion _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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