[libvirt] [PATCH v3 0/6] BaselineHypervisorCPU using QEMU QMP exchanges

Some architectures (S390) depend on QEMU to compute baseline CPU model and expand a models feature set. Interacting with QEMU requires starting the QEMU process and completing one or more query-cpu-model-baseline QMP exchanges with QEMU in addition to a query-cpu-model-expansion QMP exchange to expand all features in the model. See "s390x CPU models: exposing features" patch set on Qemu-devel for discussion of QEMU aspects. This is part of resolution of: https://bugzilla.redhat.com/show_bug.cgi?id=1511999 Version 3 attempts to address all issues from V1 and V2 including making the QEMU process activation for QMP Queries generic (not specific to capabilities) and moving that code from qemu_capabilities to qemu_process. I attempted to make the new qemu_process functions consistent with the functions but mostly ended up reusing the guts of the previous functions from qemu_capabilities. Of interest may be the choice to reuse a domain structure to hold the Qmp Query process state and connection information. Also, pay attention to the use of a large random number to uniquely identify decoupled processes in terms of sockets and file system footprint. If you believe it's worth the effort I think there are some pre-existing library functions to establish files with unique identifiers in a thread safe way. The last patch may also be interesting and is based on past discussion of QEMU cpu expansion only returning migratable features except for one x86 case where non-migratable features are explicitly requested. The patch records that features are migratable based on QEMU only returning migratable features. The main result is the CPU xml for S390 CPU's contains the same migratability info the X86 currently does. The testcases were updated to reflect the change. Is this ok? Unlike the previous versions every patch should compile independently if applied in sequence. Thanks, Chris Chris Venteicher (6): qemu_monitor: Introduce qemuMonitorCPUModelInfoNew qemu_monitor: Introduce qemuMonitorCPUModelInfo / JSON conversion qemu_monitor: qemuMonitorGetCPUModelExpansion inputs and outputs CPUModelInfo qemu_process: Use common processes mgmt funcs for all QMP query types qemu_driver: BaselineHypervisorCPU support for S390 qemu_monitor: Default props to migratable when expanding cpu model src/qemu/qemu_capabilities.c | 559 ++++++++---------- src/qemu/qemu_capabilities.h | 4 + src/qemu/qemu_driver.c | 143 ++++- src/qemu/qemu_monitor.c | 199 ++++++- src/qemu/qemu_monitor.h | 29 +- src/qemu/qemu_monitor_json.c | 210 +++++-- src/qemu/qemu_monitor_json.h | 13 +- src/qemu/qemu_process.c | 398 +++++++++++++ src/qemu/qemu_process.h | 35 ++ tests/cputest.c | 11 +- .../caps_2.10.0.s390x.xml | 60 +- .../caps_2.11.0.s390x.xml | 58 +- .../caps_2.12.0.s390x.xml | 56 +- .../qemucapabilitiesdata/caps_2.8.0.s390x.xml | 32 +- .../qemucapabilitiesdata/caps_2.9.0.s390x.xml | 34 +- .../qemucapabilitiesdata/caps_3.0.0.s390x.xml | 64 +- tests/qemucapabilitiestest.c | 7 + 17 files changed, 1375 insertions(+), 537 deletions(-) -- 2.17.1