3/6/2023 0 Comments Bochs scsiI can do additional testing / validation if required. So while there is work around of SATA and BIOS, for new VMs, I have existing VMs which need to be upgraded and this cannot be done, as network or disk subsystem fails. SCSI disk support is broken for all KVM / QEMU / OVMF networking is broken with KVM / QEMU / OVMF So in summary, in move from FreeBSD 11.2 -> 11.3 / 12.X ![]() NOTE: I also tested with custom kernel build (ie remove all bit minimal drivers but leaving MPT/MPS & VirtIO SCSI and intel em and VirtIO Networking, still does not work SCSI disk - works with lsisas1068 controller typeįreeBSD 11.3 (on KVM / QEMU Q35 with OVMF) I have tested various FreeBSD VM configuration and have found issues with SCSI and Network Device support when using: Ubuntu 19.04 / 19.10 KVM / QEMU Host with: Q35 Machine and OVMF EFI Firmware.įreeBSD 11.2 (on KVM / QEMU Q35 with OVMF)įreeBSD 11.2 (on KVM / QEMU Q35 with BIOS) Network Interface: em / qemu e1000 / Intel Pro 1G no longer works with 11.3 (it did work with 11.2) or 12.0 Pciconf with 3 Disks SATA, SCSI/lsisas1608, VirtIO + 2 NICs e1000, VirtIOġ1.3 dmesg output with custom kernel netmap removedįreeBSD VM's on Ubuntu KVM / QEMU / OVMF host have SCSI Disk and Network Issues. var/log/syslog with 3 Disks SATA, SCSI/lsisas1068, VirtIO + 2 NICs e1000, VirtIO Test against UEFI rhel 8.1 VM with above scenarios, results are similar.Dmesg with 3 disks SATA, SCSI/lsisas1068, VirtIO + 2 NICs e1000, VirtIO Memory at fea08000 (32-bit, non-prefetchable) Įxpansion ROM at fea00000 Ĭapabilities: Express Root Complex Integrated Endpoint, MSI 00ģ)Boot vm to gnome environment, desktop and mouse cursor rendered correctly, change some resolutions(1280 x 960, 1280 x 1024, 1920 x 1080), resolution can be applied successfully and no corruptions found.Ĥ)Play HD video inside VM, video can be rendered correctly Memory at fb000000 (32-bit, prefetchable) During system boot, before driver attach to bochs-vga, dmesg cannot output to remote-viewer, after driver attached, demsg can be outputed to remote-viewer.Ģ)Inside vm, can find the bochs-vga from lspci:Ġ0:01.0 Display controller: Device 1234:1111 (rev 02) device bochs-display -vnc 0.0.0.0:1ġ)Boot rhel 8.1 in multi-user.target, I can change grub setting without problem. So UEFI guests should not see any functional difference to VGA. The bochs-drm.ko linux kernel module can handle it just fine too. ![]() This (and therefore the attack surface) is an order of magnitude smallerĬompatibility wise it works with OVMF (latest git master). Just a linearįramebuffer in the pci memory bar. ![]() So there is no text mode emulation, no weird video modes (planar,Ģ56color palette), no memory window at 0xa0000. Though, neither in the legacy ioport location nor in the mmio bar.Ĭonsequently it is PCI class DISPLAY_OTHER not DISPLAY_VGA. The bochs vbe dispi interface (mbochs.ko) and seeing how simple itĪctually is I've figured that would be useful for qemu too. This changelog from this upstream commit in QEMU has more details:Ĭommit 765c94290863eef1fc4a67819d452cc13b7854a1Īfter writing up the virtual mdev device emulating a display supporting It should be used if the guest is running with UEFI. The bochs-display device is a simple display device which is similar to VGA but without legacy emulation.
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