2 ====================================
4 The virtual cpu "device" also accepts the ioctls KVM_SET_DEVICE_ATTR,
5 KVM_GET_DEVICE_ATTR, and KVM_HAS_DEVICE_ATTR. The interface uses the same struct
6 kvm_device_attr as other devices, but targets VCPU-wide settings and controls.
8 The groups and attributes per virtual cpu, if any, are architecture specific.
10 1. GROUP: KVM_ARM_VCPU_PMU_V3_CTRL
13 1.1. ATTRIBUTE: KVM_ARM_VCPU_PMU_V3_IRQ
14 Parameters: in kvm_device_attr.addr the address for PMU overflow interrupt is a
16 Returns: -EBUSY: The PMU overflow interrupt is already set
17 -ENXIO: The overflow interrupt not set when attempting to get it
18 -ENODEV: PMUv3 not supported
19 -EINVAL: Invalid PMU overflow interrupt number supplied
21 A value describing the PMUv3 (Performance Monitor Unit v3) overflow interrupt
22 number for this vcpu. This interrupt could be a PPI or SPI, but the interrupt
23 type must be same for each vcpu. As a PPI, the interrupt number is the same for
24 all vcpus, while as an SPI it must be a separate number per vcpu.
26 1.2 ATTRIBUTE: KVM_ARM_VCPU_PMU_V3_INIT
27 Parameters: no additional parameter in kvm_device_attr.addr
28 Returns: -ENODEV: PMUv3 not supported
29 -ENXIO: PMUv3 not properly configured as required prior to calling this
31 -EBUSY: PMUv3 already initialized
33 Request the initialization of the PMUv3. This must be done after creating the
34 in-kernel irqchip. Creating a PMU with a userspace irqchip is currently not