On Wed, Apr 05, 2023 at 15:19:07 -0600, Jim Fehlig wrote: > On 3/16/23 11:56, Jim Fehlig wrote: > > On 3/15/23 08:40, Ján Tomko wrote: > > > On a Monday in 2023, Jim Fehlig wrote: > > > > If an explicit machine type is not specified in the VM config, > > > > the qemu driver will select the first machine type in the list > > > > of machine types for the specified accelerator. See > > > > virQEMUCapsGetPreferredMachine > > > > > > > > https://gitlab.com/libvirt/libvirt/-/blob/master/src/qemu/qemu_capabilities.c#L6133 > > > > > > > > On my test machines, this works reasonably well for x86_64 where > > > > the first machine type is pc-i440fx-7.1. But for aarch64, the > > > > first machine is integratorcp, which is not very useful with > > > > maxCpus=1 and other limitations. > > > > > > Is it possible to run such machine with libvirt? > > > > I just did a quick check with libvirt 9.1.0 (qemu is a bit older, at 7.1.0): > > > > # cat test.xml > > <domain type='kvm'> > > <name>test</name> > > <memory unit='KiB'>2097152</memory> > > <vcpu placement='static'>1</vcpu> > > <os> > > <type>hvm</type> > > <loader readonly='yes' > > type='pflash'>/usr/share/qemu/aavmf-aarch64-code.bin</loader> > > <nvram template='/usr/share/qemu/aavmf-aarch64-vars.bin'/> > > <boot dev='hd'/> > > </os> > > <clock offset='utc'/> > > <on_poweroff>destroy</on_poweroff> > > <on_reboot>restart</on_reboot> > > <on_crash>destroy</on_crash> > > <devices> > > <emulator>/usr/bin/qemu-system-aarch64</emulator> > > <disk type='file' device='disk'> > > <driver name='qemu' type='qcow2' discard='unmap'/> > > <source file='/var/lib/libvirt/images/test.qcow2'/> > > <target dev='vda' bus='virtio'/> > > </disk> > > </devices> > > </domain> > > # virsh create test.xml > > error: Failed to create domain from test.xml > > error: internal error: Unexpected enum value 0 for virDomainDeviceAddressType > > > > I don't _think_ it's a downstream bug, nor fixed in git in the meantime. > > It appears running the old integratorcp machine with libivrt is not > > possible. > > I trimmed the config to remove things like virtio devices that are not > supported by the default machine type, but still it does not work with > libvirt: > > # cat test.xml > <domain type='kvm'> > <name>test</name> > <memory unit='KiB'>2097152</memory> > <vcpu placement='static'>1</vcpu> > <os> > <type>hvm</type> > </os> > <devices> > <emulator>/usr/bin/qemu-system-aarch64</emulator> > </devices> > </domain> > # virsh create test.xml > error: Failed to create domain from test.xml > error: internal error: process exited while connecting to monitor: > 2023-04-05T20:36:19.564896Z qemu-system-aarch64: Property > 'integratorcp-machine.acpi' not found This is a known issue which should be already fixed if you use the upcoming qemu version. Historically ACPI was controled via '-no-acpi' which is issued when you don't use the '<acpi/>' feature element in the definition. Also historically it was only used on x86. With development of the 'virt' machine type for arm which does use acpi this was un-carefully extended to aarch64 as well where it didn't work with non-virt machines. Now with the latest qemu which reports which machine type actually support ACPI we avoid use of '-no-acpi' for those which don't support it. Unfortunately the workaround of adding <acpi/> element to definition for a machine which doesn't have it doesn't work either, because a further validation check forces you to configure uefi if you want acpi.
