hw/s390x/cpu-topology.c

3  * CPU Topology
8  * S390 topology handling can be divided in two parts:
11  *   used by KVM and TCG to create and modify the topology.
13  * - The second part, building the topology information data for the
25 #include "hw/s390x/cpu-topology.h"
30  * s390_topology is used to keep the topology information.
46  * for a topology tree entry
70  * Return: true if the topology is supported by the machine.
79  * @ms: the machine state where the machine topology is defined
81  * Keep track of the machine topology.
85  * drawer 0 up to the maximum allowed by the machine topology.
103  * Function code 2 is handling topology changes and is interpreted
153  * Generic reset for CPU topology, calls s390_topology_reset()
154  * to reset the kernel Modified Topology Change Record.
167  * Setup the default topology if no attributes are already set.
172  * topology by filling the cores starting from the first socket
179  * Returns false if it is impossible to setup a default topology
187     /* All geometry topology attributes must be set or all unset */  in s390_topology_cpu_default()
191                    "Please define all or none of the topology geometry attributes");  in s390_topology_cpu_default()
227  * The function checks if the topology
228  * attributes fits inside the system topology.
230  * Returns false if the specified topology does not match with
231  * the machine topology.
272  * A modified topology change report is needed if the topology
273  * tree or the topology attributes change.
305  * @ms: MachineState used to initialize the topology structure on
307  * @cpu: the new S390CPU to insert in the topology structure
311  * before the CPU is inserted in the topology.
320      * We do not want to initialize the topology if the CPU model  in s390_topology_setup_cpu()
321      * does not support topology, consequently, we have to wait for  in s390_topology_setup_cpu()
323      * to initialize the topology structures.  in s390_topology_setup_cpu()
351     /* topology tree is reflected in props */  in s390_topology_setup_cpu()
376     /* Get attributes not provided from cpu and verify the new topology */  in s390_change_topology()
424     /* Check if we will need to report the modified topology */  in s390_change_topology()
429     /* All checks done, report new topology into the vCPU */  in s390_change_topology()
436     /* topology tree is reflected in props */  in s390_change_topology()
439     /* Advertise the topology change */  in s390_change_topology()
454         error_setg(errp, "This machine doesn't support topology");  in qmp_set_cpu_topology()