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KVM: use KVM_CAP_MAX_VCPU_ID

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As stated in linux/Documentation/virtual/kvm/api.txt:

The maximum possible value for max_vcpu_id can be retrieved using the
KVM_CAP_MAX_VCPU_ID of the KVM_CHECK_EXTENSION ioctl() at run-time.

If the KVM_CAP_MAX_VCPU_ID does not exist, you should assume that
max_vcpu_id is the same as the value returned from KVM_CAP_MAX_VCPUS.

Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
Message-Id: <146424974323.5666.5471538288045048119.stgit@bahia.huguette.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Greg Kurz 2016-05-26 10:02:23 +02:00 committed by Paolo Bonzini
parent 142c21455b
commit f31e326637
1 changed files with 7 additions and 1 deletions
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8
kvm-all.c
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@ -1519,10 +1519,16 @@ static int kvm_max_vcpus(KVMState *s)
return (ret) ? ret : kvm_recommended_vcpus(s);
}
static int kvm_max_vcpu_id(KVMState *s)
{
int ret = kvm_check_extension(s, KVM_CAP_MAX_VCPU_ID);
return (ret) ? ret : kvm_max_vcpus(s);
}
bool kvm_vcpu_id_is_valid(int vcpu_id)
{
KVMState *s = KVM_STATE(current_machine->accelerator);
return vcpu_id >= 0 && vcpu_id < kvm_max_vcpus(s);
return vcpu_id >= 0 && vcpu_id < kvm_max_vcpu_id(s);
}
static int kvm_init(MachineState *ms)