Bug 1575759
| Summary: | VIFO on intel graphics not working. | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Chris K. <kaspro> |
| Component: | qemu | Assignee: | Fedora Virtualization Maintainers <virt-maint> |
| Status: | CLOSED DEFERRED | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | medium | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 28 | CC: | amit, berrange, cfergeau, crobinso, dwmw2, itamar, pbonzini, rjones, virt-maint |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | x86_64 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2018-05-08 14:45:21 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
I suggest you report your issues to the vfio-users list, the vfio developer actively watches things there along with other users who might be able to give feedback If your thread there finds a bug we can reopen this issue to track getting the fix included in Fedora, but otherwise this bug isn't going to generate much usefulness https://www.redhat.com/archives/vfio-users/ |
Description of problem: I'm unable to forward guest graphics adapter configured in libvirtd to the host graphics adapter via vfio. Hardware: Skylake Celeron CPU G3900 on Fujitsu D3471-B11 Mainboard, integrated Intel® HD Graphics 510. Version-Release number of selected component (if applicable): Fedora 28, latest updates, libvirt 4.1.0, qemu 2.11.1-2.fc28 How reproducible / Steps to Reproduce: 1. Block i915 and other drivers from loading, force vfio drivers to load: # cat /etc/modules-load.d/vfio.conf vfio vfio_iommu_type1 vfio_pci vfio_virqfd # cat /etc/modprobe.d/vfio.conf options vfio-pci ids=8086:1902 options vfio-pci disable_vga=1 # cat /etc/modprobe.d/blacklist.conf blacklist i915 # dracut -f /boot/initramfs-4.16.5-300.fc28.x86_64.img 4.16.5-300.fc28.x86_64 # reboot # dmesg | grep -e DMAR -e IOMMU Kernel command line: BOOT_IMAGE=/vmlinuz-4.16.5-300.fc28.x86_64 root=/dev/mapper/fedora-root00 ro rd.lvm.lv=fedora/root00 rd.lvm.lv=fedora/swap rhgb quiet LANG=en_US.UTF-8 intel_iommu=on rd.driver.pre=vfio-pci bochs_drm.fbdev=off video=efifb:off,vesa:off,vesafb:off vga=normal iommu=no-igfx 0.000000] ACPI: DMAR 0x00000000A6679ED8 0000C8 (v01 INTEL SKL 00000001 INTL 00000001) [ 0.000000] DMAR: IOMMU enabled [ 0.001000] DMAR: Host address width 39 [ 0.001000] DMAR: DRHD base: 0x000000fed90000 flags: 0x0 [ 0.001000] DMAR: dmar0: reg_base_addr fed90000 ver 1:0 cap 1c0000c40660462 ecap 7e3ff0505e [ 0.001000] DMAR: DRHD base: 0x000000fed91000 flags: 0x1 [ 0.001000] DMAR: dmar1: reg_base_addr fed91000 ver 1:0 cap d2008c40660462 ecap f050da [ 0.001000] DMAR: RMRR base: 0x000000a6404000 end: 0x000000a6423fff [ 0.001000] DMAR: RMRR base: 0x000000adb9e000 end: 0x000000adde7fff [ 0.001000] DMAR: RMRR base: 0x000000af000000 end: 0x000000cf7fffff [ 0.001000] DMAR-IR: IOAPIC id 2 under DRHD base 0xfed91000 IOMMU 1 [ 0.001000] DMAR-IR: HPET id 0 under DRHD base 0xfed91000 [ 0.001000] DMAR-IR: x2apic is disabled because BIOS sets x2apic opt out bit. [ 0.001000] DMAR-IR: Use 'intremap=no_x2apic_optout' to override the BIOS setting. [ 0.002000] DMAR-IR: Enabled IRQ remapping in xapic mode [ 0.357713] DMAR: No ATSR found [ 0.357755] DMAR: dmar0: Using Queued invalidation [ 0.357757] DMAR: dmar1: Using Queued invalidation [ 0.357872] DMAR: Setting RMRR: [ 0.357901] DMAR: Setting identity map for device 0000:00:02.0 [0xaf000000 - 0xcf7fffff] [ 0.357927] DMAR: Setting identity map for device 0000:00:14.0 [0xadb9e000 - 0xadde7fff] [ 0.357936] DMAR: Setting identity map for device 0000:00:14.0 [0xa6404000 - 0xa6423fff] [ 0.357938] DMAR: Prepare 0-16MiB unity mapping for LPC [ 0.357955] DMAR: Setting identity map for device 0000:00:1f.0 [0x0 - 0xffffff] [ 0.357963] DMAR: Intel(R) Virtualization Technology for Directed I/O ... ... [ 1.113517] VFIO - User Level meta-driver version: 0.3 [ 1.140028] vfio-pci 0000:00:02.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=io+mem:owns=io+mem [ 1.152032] vfio_pci: add [8086:1902[ffff:ffff]] class 0x000000/00000000 ... 2.: Host boots with graphics adapter stalled after grub, as it should. Configuring a guest with a legacy BIOS: <domain type='kvm' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'> ... <hostdev mode='subsystem' type='pci' managed='yes'> <driver name='vfio'/> <source> <address domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </source> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </hostdev> ... </devices> <qemu:commandline> <qemu:arg value='-nographic'/> <qemu:arg value='-nodefaults'/> </qemu:commandline> ... starts up with practically no errors, but no signal output. Logs: ... ...vfio-pci 0000:00:02.0: enabling device (0400 -> 0403) ...vfio_ecap_init: 0000:00:02.0 hiding ecap 0x1b@0x100 ... 3.: Configuring a guest with UEFI BIOS, 440FX Chipset gives (and thousands of these... not just some): [ 3419.435439] DMAR: DRHD: handling fault status reg 2 [ 3419.435446] DMAR: [DMA Write] Request device [00:02.0] fault addr 0 [fault reason 02] Present bit in context entry is clear [ 3419.436683] DMAR: DRHD: handling fault status reg 3 [ 3419.436691] DMAR: [DMA Read] Request device [00:02.0] fault addr afa40000 [fault reason 06] PTE Read access is not set [ 3419.438069] DMAR: DRHD: handling fault status reg 3 [ 3419.438076] DMAR: [DMA Read] Request device [00:02.0] fault addr afa40000 [fault reason 06] PTE Read access is not set [ 3419.439473] DMAR: DRHD: handling fault status reg 3 [ 3419.439480] DMAR: [DMA Read] Request device [00:02.0] fault addr afa6e000 [fault reason 06] PTE Read access is not set [ 3419.440872] DMAR: DRHD: handling fault status reg 3 [ 3419.440879] DMAR: [DMA Read] Request device [00:02.0] fault addr afaa6000 [fault reason 06] PTE Read access is not set ... and a washed out/scrambled output on the digital output (like the actual startup of the guest, but unreadable and with lines all over the screen. Actual results: No correct signal on digital output, scrambled or blank. Expected results: Digital output to show guest graphics. Additional info: Also tried with iommu= "pt" and "on".