[libvirt] [PATCH 0/3] qemu: support disabling/enabling kvmclock with <timer> elements

QEMU supports a bunch of CPUID features that are tied to the kvm CPUID nodes rather than the processor's. They are "kvmclock", "kvm_nopiodelay", "kvm_mmu", "kvm_asyncpf". These are not known to libvirt and their CPUID leaf might move if (for example) the Hyper-V extensions are enabled. Hence their handling would anyway require some special-casing. However, among these the most useful is kvmclock; an additional "property" of this feature is that a <timer> element is a better model than a CPUID feature. This is what this series does. Patch 1 tweaks the -cpu parsing code so that it detects the "default" CPU names and (instead of creating a <cpu> element) sets the guest arch to either i686 or x86_64; this is useful and helped writing testcases. The next two patches add the new feature. Finally, patch 4 tweaks the default CPU model to be more precise when KVM is enabled. Paolo Bonzini (4): qemu: get arch name from <cpu> element conf: add kvmclock timer qemu: parse and create -cpu ...,-kvmclock qemu: default to kvm32/kvm64 when KVM is enabled docs/formatdomain.html.in | 4 +- docs/schemas/domaincommon.rng | 3 +- src/conf/domain_conf.c | 3 +- src/conf/domain_conf.h | 1 + src/qemu/qemu_command.c | 138 ++++++++++++++++---- tests/qemuargv2xmltest.c | 4 + tests/qemuxml2argvdata/qemu-lib.sh | 1 + .../qemuxml2argv-cpu-host-kvmclock.args | 4 + .../qemuxml2argv-cpu-host-kvmclock.xml | 23 ++++ .../qemuxml2argv-cpu-kvmclock.args | 4 + .../qemuxml2argvdata/qemuxml2argv-cpu-kvmclock.xml | 24 ++++ tests/qemuxml2argvdata/qemuxml2argv-kvmclock.args | 4 + tests/qemuxml2argvdata/qemuxml2argv-kvmclock.xml | 21 +++ tests/qemuxml2argvtest.c | 3 + tests/qemuxml2xmltest.c | 3 + 15 files changed, 209 insertions(+), 31 deletions(-) create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-cpu-host-kvmclock.args create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-cpu-host-kvmclock.xml create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-cpu-kvmclock.args create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-cpu-kvmclock.xml create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-kvmclock.args create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-kvmclock.xml -- 1.7.7.1