A recurring task in libvirt is synchronizing the list of (x86) cpu features with qemu. This is an error-prone and manual task as it relies on parsing qemu c source code and therefore neccessarily lags behind qemu development. The better solution would be if qemu and libvirt both got the cpu feature information from a common source. libcpuinfo [1] wants to be that source, a comprehensive, architecture agnostic database of cpu information, together with some handy tooling, e.g. a library to access this database at run-time, quering the host for capabilities, calculate baselines for different sets of capabilities. libcpuinfo comes with c headers and contains python bindings. This patch series prepares libvirt's x86 feature list to be automatically generated from libcpuinfo data, but introduces no dependency on libcpuinfo yet. Introducing that dependency to generate the feature list on compile time or making use of libcpuinfo's more advanced features would be up to discussion at a later date. Note that libcpuinfo's feature database is not on par with libvirt yet and to generate an identical version of x86_features.xml the data from libcpuinfo's "wip" branch is required. [1] https://gitlab.com/twiederh/libcpuinfo Tim Wiederhake (5): cpu_map: Sort cpu features cpu_map: Format register values uniformly cpu_map: Format comments cpu_map: Remove unused alias information cpu_map: Generate x86 feature map from libcpuinfo src/cpu_map/x86_features.py | 119 +++++++ src/cpu_map/x86_features.xml | 594 +++++++++++++++++------------------ 2 files changed, 407 insertions(+), 306 deletions(-) create mode 100755 src/cpu_map/x86_features.py -- 2.39.2
