Messages in this thread | | | Subject | [PATCH v5 0/2] let archs decide for vCPU ids | From | Greg Kurz <> | Date | Mon, 02 May 2016 19:42:05 +0200 |
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Architectures can freely choose vCPU ids as long as they stay below KVM_MAX_VCPUS, which is the maximum number of vCPUS. This is a problem for PowerPC where the ids have to be multiples of the number of threads per core in the host: when the host is POWER8 with 8 threads per core, we can only have KVM_MAX_VCPUS / 8 in the guest.
This series decouplates the vCPU id limit from the number of vCPUs.
The first patch is a cleanup I kept from v4.
The second patch adds KVM_MAX_VCPU_ID as suggested by Radim.
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Greg Kurz (2): KVM: remove NULL return path for vcpu ids >= KVM_MAX_VCPUS kvm: introduce KVM_MAX_VCPU_ID
Documentation/virtual/kvm/api.txt | 10 ++++++++-- arch/powerpc/include/asm/kvm_host.h | 2 ++ arch/powerpc/kvm/powerpc.c | 3 +++ include/linux/kvm_host.h | 11 ++++++++--- include/uapi/linux/kvm.h | 1 + virt/kvm/kvm_main.c | 2 +- 6 files changed, 23 insertions(+), 6 deletions(-)
-- Greg
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