[libvirt] [RFC PATCH v2 0/4] Libvirt for PowerPC

Hi, Recent development in KVM for 64-bit Power ISA Book3S machines, allows users to run multiple KVM guest instances on POWER7 and PPC970 processor based systems. Also qemu-system-ppc64 has been enhanced to support a new machine type "pseries" suitable for Power Book3S machines. This addition effectively brings the KVM+qemu combination to run multiple guest instances on a Power Book3S machine. Libvirt continues to be the key interface to configure and manage the KVM guest instances on x86. This patch set is an effort to enable libvirt to support KVM guest configuration and management on Power Book3S machines. Based on community discussion around the earlier version, this patch series augments the present 'kvm' driver to support PowerPC-KVM based guests. Since some of the supported devices vary between architectures, the code is now reworked to dynamically choose the correct handler function based on guest domain architecture at runtime (def->os.arch). This patch series consists of 4 patches : Patch 1/4 : Use sysfs to gather host topology. Presently libvirt depends on /proc/cpuinfo gather CPU, cores, threads, etc This is highly architecture dependent. A alternative is to use sysfs, which provides a platform-neutral interface to parse CPU topology. Patch 2/4 : Add PowerPC CPU Driver Patch 3/4 : Add support for qemu-system-ppc64 Patch 4/4 : Refactor qemu commmand-line generation to separate out arch- specific options from generic command line. Changelog from v1: * Patches 1,2,3 unchanged ; The hacks in Patch 4 of v1 have been replaced by a new patch to neatly select arch-specific features. Awaiting comments and feedback, -- Prerna Saxena Linux Technology Centre, IBM Systems and Technology Lab, Bangalore, India