[PATCH v1 0/5] Allow Guest CPU Model with Deprecated Features Disabled

Add support for libvirt to query and cache an array of deprecated CPU features (aka CPU properties) for the host-model. This data is queried via a full query-cpu-model-expansion and cached in the QEMU capabilities file. This model expansion will depend on the availability of the "deprecated-props" field resulting from a query-cpu-model-expansion command. Currently, only s390x supports this field. The purpose of these patches is to make it easy for users to create guests with a CPU model that will be compatible & migratable with future hardware. An updated host CPU model with deprecated features paired with the policy "disable" may be visable via an update to the virsh domcapabilities command with the --disable-deprecated-features flag. An example is shown below. Note: other CPU model queries (e.g. baseline and comparison) currently do not consider deprecated features, as their outputs do not consider feature policy. If implementation is desired, it will require a discussion on how these commands should report policies. Examples: virsh domcapabilities --disable-deprecated-features e.g. output (trimmed): <mode name='host-model' supported='yes'> <model fallback='forbid'>z14.2-base</model> <feature policy='require' name='aen'/> <feature policy='require' name='cmmnt'/> <feature policy='require' name='aefsi'/> <feature policy='require' name='diag318'/> <feature policy='require' name='mepoch'/> <feature policy='require' name='msa8'/> <feature policy='require' name='msa7'/> <feature policy='require' name='msa6'/> <feature policy='require' name='msa5'/> <feature policy='require' name='msa4'/> <feature policy='require' name='msa3'/> <feature policy='require' name='msa2'/> <feature policy='require' name='msa1'/> <feature policy='require' name='sthyi'/> <feature policy='require' name='edat'/> <feature policy='require' name='ri'/> <feature policy='require' name='edat2'/> <feature policy='require' name='etoken'/> <feature policy='require' name='vx'/> <feature policy='require' name='ipter'/> <feature policy='require' name='mepochptff'/> <feature policy='require' name='ap'/> <feature policy='require' name='vxeh'/> <feature policy='require' name='vxpd'/> <feature policy='require' name='esop'/> <feature policy='require' name='apqi'/> <feature policy='require' name='apft'/> <feature policy='require' name='els'/> <feature policy='require' name='iep'/> <feature policy='require' name='apqci'/> <feature policy='disable' name='cte'/> <feature policy='require' name='ais'/> <feature policy='disable' name='bpb'/> <feature policy='require' name='ctop'/> <feature policy='require' name='gs'/> <feature policy='require' name='ppa15'/> <feature policy='require' name='zpci'/> <feature policy='require' name='sea_esop2'/> <feature policy='disable' name='te'/> <feature policy='require' name='cmm'/> <feature policy='disable' name='csske'/> </mode> A domain may be defined with a new <cpu> XML attribute, deprecated_features='on|off': <cpu mode='host-model' check='partial' deprecated_features='off'/> e.g. after guest has started (trimmed): <cpu mode='custom' match='exact' check='partial' deprecated_features='off'> <model fallback='forbid'>z14.2-base</model> <feature policy='require' name='aen'/> <feature policy='require' name='cmmnt'/> <feature policy='require' name='aefsi'/> <feature policy='require' name='diag318'/> <feature policy='require' name='mepoch'/> <feature policy='require' name='msa8'/> <feature policy='require' name='msa7'/> <feature policy='require' name='msa6'/> <feature policy='require' name='msa5'/> <feature policy='require' name='msa4'/> <feature policy='require' name='msa3'/> <feature policy='require' name='msa2'/> <feature policy='require' name='msa1'/> <feature policy='require' name='sthyi'/> <feature policy='require' name='edat'/> <feature policy='require' name='ri'/> <feature policy='require' name='edat2'/> <feature policy='require' name='etoken'/> <feature policy='require' name='vx'/> <feature policy='require' name='ipter'/> <feature policy='require' name='mepochptff'/> <feature policy='require' name='ap'/> <feature policy='require' name='vxeh'/> <feature policy='require' name='vxpd'/> <feature policy='require' name='esop'/> <feature policy='require' name='apqi'/> <feature policy='require' name='apft'/> <feature policy='require' name='els'/> <feature policy='require' name='iep'/> <feature policy='require' name='apqci'/> <feature policy='disable' name='cte'/> <feature policy='require' name='ais'/> <feature policy='disable' name='bpb'/> <feature policy='require' name='ctop'/> <feature policy='require' name='gs'/> <feature policy='require' name='ppa15'/> <feature policy='require' name='zpci'/> <feature policy='require' name='sea_esop2'/> <feature policy='disable' name='te'/> <feature policy='require' name='cmm'/> <feature policy='disable' name='csske'/> </cpu> Collin Walling (5): qemuMonitorJSONGetCPUModelExpansion: refactor parsing functions qemu: parse deprecated-props from query-cpu-model-expansion response qemu_capabilities: query deprecated features for host-model virsh: add --disable-deprecated-features flag to domcapabilities conf: add deprecated_features attribute docs/manpages/virsh.rst | 6 + include/libvirt/libvirt-domain.h | 12 + src/conf/cpu_conf.c | 10 + src/conf/cpu_conf.h | 1 + src/conf/schemas/cputypes.rng | 12 + src/libvirt-domain.c | 2 +- src/qemu/qemu_capabilities.c | 89 +++++ src/qemu/qemu_capabilities.h | 4 + src/qemu/qemu_driver.c | 8 +- src/qemu/qemu_monitor.c | 10 + src/qemu/qemu_monitor.h | 1 + src/qemu/qemu_monitor_json.c | 64 +++- src/qemu/qemu_process.c | 4 + .../caps_9.1.0_s390x.replies | 348 +++++++++++++++++- .../qemucapabilitiesdata/caps_9.1.0_s390x.xml | 13 + .../caps_9.2.0_s390x.replies | 348 +++++++++++++++++- .../qemucapabilitiesdata/caps_9.2.0_s390x.xml | 13 + tools/virsh-host.c | 9 +- 18 files changed, 940 insertions(+), 14 deletions(-) -- 2.45.1