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57b5981cd3
The handling of MVPG, PFMF and Test Block is fixed to better follow the architecture. None of these fixes is critical for any current Linux guests, but let's play safe. 2. Optimization for single CPU guests We can enable the IBS facility if only one VCPU is running (!STOPPED state). We also enable this optimization for guest > 1 VCPU as soon as all but one VCPU is in stopped state. Thus will help guests that have tools like cpuplugd (from s390-utils) that do dynamic offline/ online of CPUs. 3. NOTES There is one non-s390 change in include/linux/kvm_host.h that introduces 2 defines for VCPU requests: define KVM_REQ_ENABLE_IBS 23 define KVM_REQ_DISABLE_IBS 24 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iQIcBAABAgAGBQJTX6eTAAoJEBF7vIC1phx8S8YQAKRQ1Oe75qLS+F1yipNHi905 7byi0K2nuGF/K4NSkQeWyv8mqjlWIEE+a8PR69mrgx6biae/Sn6l2ZZiV3Ml0flH 9FEIlu0PU/RvyPfERT9MxUsbY2Dbec4r3Q3U+RLftlAht6oA/AaiLaY6cKSzwXqa vTqm7VORgTsM7JUkdoC/BdwNH6+94I7IM6CGaWMmWqELAhKq6SUCmc8g26bvEjBd 94bkUEBYgHuceEPYAmDA1r7QSStpnU+cgj0haHRI12g4y1PhuBuFkmAGPv/E60wT iGOkhQ5XchR6dmZBLC/zRbjObi5NqqRojRYcI8RZfbdfvxtD8+xKg7G++KXw+VkK lR2CyJfrXms9r90mo7Oi3oCEuy0gC5ToOtRbOb/Xo8CYjCd6pS8DJraaQQfUhsoX koWiPVu87Gk6GMALZdJYCAdHgOhwC/dglKVGHThsFFVwLgsC7ZKsluWYA/Y0FRtA B2A7DBIC5O1NNXs3CYIv+v0M3jNF+4tt7wxV4omNPiSZTb4IAhG+0ucvU+hIZFbm i07a1sULAOSAX7qeizmHamomrC5NeEOUQeQ2ciQbSH9L+GEZQj10YaOXXKQh79C+ 7LXTtXWzESzx+EXBuCPcFsNt84GH294YoFTitHzN0hAburkVqwQzIAEAby7ylgX2 WUC6UjhyheZr0rBqO2g9 =Lxxg -----END PGP SIGNATURE----- Merge tag 'kvm-s390-20140429' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into kvm-next 1. Guest handling fixes The handling of MVPG, PFMF and Test Block is fixed to better follow the architecture. None of these fixes is critical for any current Linux guests, but let's play safe. 2. Optimization for single CPU guests We can enable the IBS facility if only one VCPU is running (!STOPPED state). We also enable this optimization for guest > 1 VCPU as soon as all but one VCPU is in stopped state. Thus will help guests that have tools like cpuplugd (from s390-utils) that do dynamic offline/ online of CPUs. 3. NOTES There is one non-s390 change in include/linux/kvm_host.h that introduces 2 defines for VCPU requests: define KVM_REQ_ENABLE_IBS 23 define KVM_REQ_DISABLE_IBS 24 |
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