3.19 changes for KVM: - spring cleaning: removed support for IA64, and for hardware-assisted virtualization on the PPC970 - ARM, PPC, s390 all had only small fixes For x86: - small performance improvements (though only on weird guests) - usual round of hardware-compliancy fixes from Nadav - APICv fixes - XSAVES support for hosts and guests. XSAVES hosts were broken because the (non-KVM) XSAVES patches inadvertently changed the KVM userspace ABI whenever XSAVES was enabled; hence, this part is going to stable. Guest support is just a matter of exposing the feature and CPUID leaves support. Right now KVM is broken for PPC BookE in your tree (doesn't compile). I'll reply to the pull request with a patch, please apply it either before the pull request or in the merge commit, in order to preserve bisectability somewhat.