Commit af130d0a authored Sep 24, 2020 by Alexandru Elisei Committed by Marc Zyngier Sep 29, 2020

KVM: arm64: Add undocumented return values for PMU device control group

KVM_ARM_VCPU_PMU_V3_IRQ returns -EFAULT if get_user() fails when reading
the interrupt number from kvm_device_attr.addr.

KVM_ARM_VCPU_PMU_V3_INIT returns the error value from kvm_vgic_set_owner().
kvm_arm_pmu_v3_init() checks that the vgic has been initialized and the
interrupt number is valid, but kvm_vgic_set_owner() can still return the
error code -EEXIST if another device has already claimed the interrupt.

Signed-off-by: Alexandru Elisei <alexandru.elisei@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Link: https://lore.kernel.org/r/20200924123731.268177-2-alexandru.elisei@arm.com

parent 8be86a5e

Documentation/virt/kvm/devices/vcpu.rst

+2 −0

Original line number	Diff line number	Diff line
		@@ -25,6 +25,7 @@ Returns:

		======= ========================================================
		-EBUSY The PMU overflow interrupt is already set
		-EFAULT Error reading interrupt number
		-ENXIO The overflow interrupt not set when attempting to get it
		-ENODEV PMUv3 not supported
		-EINVAL Invalid PMU overflow interrupt number supplied or
		@@ -45,6 +46,7 @@ all vcpus, while as an SPI it must be a separate number per vcpu.
		Returns:

		======= ======================================================
		-EEXIST Interrupt number already used
		-ENODEV PMUv3 not supported or GIC not initialized
		-ENXIO PMUv3 not properly configured or in-kernel irqchip not
		configured as required prior to calling this attribute