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Commit 76d25402 authored by Pekka Enberg's avatar Pekka Enberg Committed by Avi Kivity
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KVM: Add documentation for KVM_CAP_NR_VCPUS 



Document KVM_CAP_NR_VCPUS that can be used by the userspace to determine
maximum number of VCPUs it can create with the KVM_CREATE_VCPU ioctl.

Cc: Avi Kivity <avi@redhat.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Jan Kiszka <jan.kiszka@web.de>
Signed-off-by: default avatarPekka Enberg <penberg@kernel.org>
Signed-off-by: default avatarAvi Kivity <avi@redhat.com>
parent 8fa22068

Documentation/kvm/api.txt

+4 −1
Original line number Diff line number Diff line
@@ -175,7 +175,10 @@ Parameters: vcpu id (apic id on x86) 
Returns: vcpu fd on success, -1 on error



This API adds a vcpu to a virtual machine.  The vcpu id is a small integer

in the range [0, max_vcpus).

in the range [0, max_vcpus).  You can use KVM_CAP_NR_VCPUS of the

KVM_CHECK_EXTENSION ioctl() to determine the value for max_vcpus at run-time.

If the KVM_CAP_NR_VCPUS does not exist, you should assume that max_vcpus is 4

cpus max.



4.8 KVM_GET_DIRTY_LOG (vm ioctl)