I just tested freshly compiled xen.gz file produced from patched source, as recommended by ktempkin. (Previous post xen.diff attached file got applied to disable pmr).
Same behavior was observable with iommu=no-igfx: when net-vm tray icon gets rendered (corrupted graphics) and notification are draw on screen, system hang without logging any error. I will compile xen with debugging options. If you guys have any insight or people I should talk to, please advise. It would be greatly appreciated. :) Thierry Le dim. 24 janv. 2016 18:45, Marek Marczykowski-Górecki < marma...@invisiblethingslab.com> a écrit : > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA256 > > On Sun, Jan 24, 2016 at 06:21:05PM +0000, Thierry Laurion wrote: > > Hi devs! > > > > XEN devs: > > As per short discussion with ktemkin earlier in January in #xen: > > > > "ktemkin Jan 10, 2016 16:21:50 > > This test patch did appear to make the system work, though: > > https://gist.github.com/ktemkin/0e81b93654ae800a5609 > > > > ktemkin Jan 10, 2016 16:24:55 > > Only real difference I see between that and the upstream behavior > (besides > > limiting things to dom0 so things weren't accidentally passed through) is > > the call to disable_pmr on line 117 before aborting." > > > > > > > > Makes total sense to my early understanding, since it seems that it is > said > > that vt-d engine gets disabled, but disable_pmr(iommu) function is not > > called to enforce. > > > > What do you think? > > > > QUBES devs: > > I'm still trying to understand how to apply this patch to qubes_builder > to > > actually build a test iso or xen.gz image and report. All Qubes patches > > seem to be applied from git to local directory structure. Looking inside > > the code to understand how to generate the provided patch to git can > apply > > it to local chrooted environment when building. Any documentation you > could > > point me to would be greatly appreciated, as any feedback to actually fix > > the issue stopping this laptop from being a nearly perfect candidate for > > Qubes. > > Actually for testing patched hypervisor, you can build xen the standard > way (http://wiki.xenproject.org/wiki/Compiling_Xen_From_Source). And > then copy just xen.gz. Qubes-specific patches are only for the > toolstack, not the hypervisor. > > But if you want to build full xen package, simply place patches > somewhere in qubes-builder/qubes-src/vmm-xen (patches.misc subdir?) and > add them to series.conf. Then execute "make vmm-xen" from qubes-builder > directory. > > > > > Thierry > > > > Le sam. 23 janv. 2016 à 02:37, Thierry Laurion < > thierry.laur...@gmail.com> > > a écrit : > > > > > Hey devs, > > > > > > Thinkpad x200 p8600 laptops have vt-d, vt-x and tpm. They also have > intel > > > integrated graphics 4 Series (gm45 chipset), supported through i915 > driver. > > > > > > In December, a fix got introduced to Xen 4.6 through iommu=no-igfx > switch. > > > Before that fix, it was impossible to boot xen without passing iommu=0. > > > > > > With iommu=no-igfx passed on, Qubes boots xen, kernel, dom0 and domu > until > > > some graphic rendering is done from a domu to dom0 xserver. > > > > > > I'm trying to push forward IOMMU support of gm45 chipset here. The > problem > > > is between i915 and xen iommu support for sure, but there is no crash > or > > > interesting debugging information given on a serial console. > > > > > > Any dev help is welcome since that beast and t400 would be excellent > Qubes > > > candidates once that problem is fixed. I posted in December on the list > > > just before Christmas but I guess the timing wasn't right;) > > > > > > Thanks for your help. > > > Thierry > > > > > > > > > - -- > Best Regards, > Marek Marczykowski-Górecki > Invisible Things Lab > A: Because it messes up the order in which people normally read text. > Q: Why is top-posting such a bad thing? > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v2 > > iQEcBAEBCAAGBQJWpWIjAAoJENuP0xzK19csmBcH/jAkYioso8K0POq+hIPop9Ft > E9h0b964j/jaZsgqofmnZFj8ZA4zI/qr4mQEIuNdk+dUgN69awn/Ffa+/bxTtv0B > 7AnCv65s+xMAOn8YHIc/pcwmL1/FymK1NAoVdk4wWXdWhxOW1PdGp+OCvFGFpOd1 > L0rWwuY+EAV1UnUmd4OyPBLVh4f5fFG7B4tXnd1LaZ18noeSOaJpj5/o55zuwpgC > Fx3CtxtAlMLOpu7W1S/MzC73aOajKpFwoaS4RAMD8/Wby3nvtgcBJ6jmBmmSdn/J > 9YUOxO9cflIKjKbqXmYZJFceK1CmGNYhYEjTI8m1K9e+ian3vWa3GOwEfBk1oIo= > =F+Eh > -----END PGP SIGNATURE----- >
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