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
