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authorAvi Kivity <avi@redhat.com>2010-04-25 15:51:46 +0300
committerAvi Kivity <avi@redhat.com>2010-05-17 12:19:30 +0300
commitb843f065481488fd1d1f4ff2179aaf4f300a1358 (patch)
tree87d6ca03a06388ad176e1ff60bf07a710f5bf990 /Documentation/kvm
parentdf2fb6e7106dd0b76e3576bfaecbeb6f34843709 (diff)
KVM: Document KVM_GET_MP_STATE and KVM_SET_MP_STATE
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'Documentation/kvm')
-rw-r--r--Documentation/kvm/api.txt44
1 files changed, 44 insertions, 0 deletions
diff --git a/Documentation/kvm/api.txt b/Documentation/kvm/api.txt
index baa8fde8bd16..a237518e51b9 100644
--- a/Documentation/kvm/api.txt
+++ b/Documentation/kvm/api.txt
@@ -848,6 +848,50 @@ function properly, this is the place to put them.
__u8 pad[64];
};
+4.37 KVM_GET_MP_STATE
+
+Capability: KVM_CAP_MP_STATE
+Architectures: x86, ia64
+Type: vcpu ioctl
+Parameters: struct kvm_mp_state (out)
+Returns: 0 on success; -1 on error
+
+struct kvm_mp_state {
+ __u32 mp_state;
+};
+
+Returns the vcpu's current "multiprocessing state" (though also valid on
+uniprocessor guests).
+
+Possible values are:
+
+ - KVM_MP_STATE_RUNNABLE: the vcpu is currently running
+ - KVM_MP_STATE_UNINITIALIZED: the vcpu is an application processor (AP)
+ which has not yet received an INIT signal
+ - KVM_MP_STATE_INIT_RECEIVED: the vcpu has received an INIT signal, and is
+ now ready for a SIPI
+ - KVM_MP_STATE_HALTED: the vcpu has executed a HLT instruction and
+ is waiting for an interrupt
+ - KVM_MP_STATE_SIPI_RECEIVED: the vcpu has just received a SIPI (vector
+ accesible via KVM_GET_VCPU_EVENTS)
+
+This ioctl is only useful after KVM_CREATE_IRQCHIP. Without an in-kernel
+irqchip, the multiprocessing state must be maintained by userspace.
+
+4.38 KVM_SET_MP_STATE
+
+Capability: KVM_CAP_MP_STATE
+Architectures: x86, ia64
+Type: vcpu ioctl
+Parameters: struct kvm_mp_state (in)
+Returns: 0 on success; -1 on error
+
+Sets the vcpu's current "multiprocessing state"; see KVM_GET_MP_STATE for
+arguments.
+
+This ioctl is only useful after KVM_CREATE_IRQCHIP. Without an in-kernel
+irqchip, the multiprocessing state must be maintained by userspace.
+
5. The kvm_run structure
Application code obtains a pointer to the kvm_run structure by