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authorPaolo Bonzini <pbonzini@redhat.com>2017-11-02 18:21:26 +0100
committerPaolo Bonzini <pbonzini@redhat.com>2017-11-02 18:21:26 +0100
commit6d6ab940dc8b1c84fc86195c0f15a82ef282c8a3 (patch)
tree90127d4682f3e728a3516994e7696488f1db6385 /arch/arm64
parent9ffd986c6e4e59c11857cbc78e4217e9569f3725 (diff)
parentc01015091a77035de1939ef106bfbcaf9a21395f (diff)
Merge branch 'kvm-ppc-next' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc into HEAD
Apart from various bugfixes and code cleanups, the major new feature is the ability to run guests using the hashed page table (HPT) MMU mode on a host that is using the radix MMU mode. Because of limitations in the current POWER9 chip (all SMT threads in each core must use the same MMU mode, HPT or radix), this requires the host to be configured to run similar to POWER8: the host runs in single-threaded mode (only thread 0 of each core online), and have KVM be able to wake up the other threads when a KVM guest is to be run, and use the other threads for running guest VCPUs. A new module parameter, called "indep_threads_mode", is normally Y on POWER9 but must be set to N before any HPT guests can be run on a radix host: # echo N >/sys/module/kvm_hv/parameters/indep_threads_mode # ppc64_cpu --smt=off Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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