On Tue, Oct 16, 2018 at 8:37 AM Lu Baolu <baolu...@linux.intel.com> wrote: > > Hi Sedat, > > Sorry for late reply. > > Do you still have this issue with newer rc's (like 4.19-rc8)? > > I checked the dmesg log you attached there, it seems that the vt-d was > not on actually. >
Hi Lu, Thanks for asking. I am running a Clang-7 compiled Linux 4.19-rc6 and VirtualBox is reporting "IOMMU found". root@iniza:~# dmesg | grep -i iommu [ 0.000000] Command line: initrd=\initrd.img-4.19.0-rc6-1-amd64-cbl root=UUID=4c2aa544-6e86-44d2-9329-572623867b3d ro intel_iommu=on [ 0.145385] Kernel command line: initrd=\initrd.img-4.19.0-rc6-1-amd64-cbl root=UUID=4c2aa544-6e86-44d2-9329-572623867b3d ro intel_iommu=on [ 0.145411] DMAR: IOMMU enabled [ 0.243068] DMAR-IR: IOAPIC id 2 under DRHD base 0xfed91000 IOMMU 1 [ 0.893466] iommu: Adding device 0000:00:00.0 to group 0 [ 0.893475] iommu: Adding device 0000:00:02.0 to group 1 [ 0.893490] iommu: Adding device 0000:00:14.0 to group 2 [ 0.893498] iommu: Adding device 0000:00:14.2 to group 2 [ 0.893508] iommu: Adding device 0000:00:15.0 to group 3 [ 0.893519] iommu: Adding device 0000:00:16.0 to group 4 [ 0.893545] iommu: Adding device 0000:00:1c.0 to group 5 [ 0.893564] iommu: Adding device 0000:00:1c.6 to group 6 [ 0.893580] iommu: Adding device 0000:00:1d.0 to group 7 [ 0.893598] iommu: Adding device 0000:00:1d.2 to group 8 [ 0.893624] iommu: Adding device 0000:00:1f.0 to group 9 [ 0.893632] iommu: Adding device 0000:00:1f.2 to group 9 [ 0.893640] iommu: Adding device 0000:00:1f.3 to group 9 [ 0.893648] iommu: Adding device 0000:00:1f.4 to group 9 [ 0.893656] iommu: Adding device 0000:00:1f.6 to group 9 [ 0.893676] iommu: Adding device 0000:04:00.0 to group 10 [ 0.893693] iommu: Adding device 0000:3e:00.0 to group 11 [ 1.116440] AMD IOMMUv2 driver by Joerg Roedel <jroe...@suse.de> [ 1.116463] AMD IOMMUv2 functionality not available on this system [ 42.117773] vboxpci: IOMMU found How can I be sure Intel-IOMMU is working correctly beyond checking dmesg logs? [1] recommends to check... root@iniza:~# find /sys | grep dmar Shall I re-check with Linux v4.19-rc8? Thanks in advance. Regards, - Sedat - [1] https://stackoverflow.com/questions/44286683/check-for-iommu-support-on-linux [2] https://www.kernel.org/doc/Documentation/Intel-IOMMU.txt > Best regards, > Lu Baolu > > On 9/5/18 8:04 PM, Sedat Dilek wrote: > > Hi Joerg, > > > > "intel_ioomu=on" was working fine here on my ThinkPad T470 with > > debian/testing AMD64 with Linux v4.17.y and v4.18.y. > > > > With testing Linux v4.19-rc1 and v4.19-rc2 my machine is not booting - > > black screen. > > These kernels are built with LLVM/Clang v7.0.0rc2 (v4.18.y too). > > > > Furthermore, I switched from GRUB to systemd-boot v239. > > > > [ /boot/efi/loader/entries/debian.conf ] > > > > title Debian GNU/Linux buster/sid [ debian kernel ] > > linux /vmlinuz-4.17.0-3-amd64 > > initrd /initrd.img-4.17.0-3-amd64 > > options root=UUID=4c2aa544-6e86-44d2-9329-572623867b3d ro intel_iommu=on > > > > [ /boot/efi/loader/entries/debian-llvmlinux.conf ] > > > > title Debian GNU/Linux buster/sid [ llvmlinux kernel (EXPERIMENTAL) ] > > linux /vmlinuz-4.19.0-rc2-3-iniza-llvmlinux > > initrd /initrd.img-4.19.0-rc2-3-iniza-llvmlinux > > options root=UUID=4c2aa544-6e86-44d2-9329-572623867b3d ro > > > > Any hints or hints to debug this? > > Any other kernel boot cheats [1] I can try? > > > > My kernel-config and dmesg output is attached. > > > > Thanks in advance. > > > > Regards, > > - Sedat - > > > > > > Documentation/intel_txt.txt > > Documentation/admin-guide/kernel-parameters.txt > > Documentation/Intel-IOMMU.txt > > > > [1] > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/admin-guide/kernel-parameters.txt#n1645 > > [2] > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/Intel-IOMMU.txt > > [3] > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/intel_txt.txt > > > > > > _______________________________________________ > > iommu mailing list > > iommu@lists.linux-foundation.org > > https://lists.linuxfoundation.org/mailman/listinfo/iommu > > _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
