From af130d0adc8e48c73030c0d71a59ce1f7809a8fa Mon Sep 17 00:00:00 2001 From: Alexandru Elisei Date: Thu, 24 Sep 2020 13:37:30 +0100 Subject: [PATCH] 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 Signed-off-by: Marc Zyngier Reviewed-by: Andrew Jones Link: https://lore.kernel.org/r/20200924123731.268177-2-alexandru.elisei@arm.com --- Documentation/virt/kvm/devices/vcpu.rst | 2 ++ 1 file changed, 2 insertions(+) diff --git a/Documentation/virt/kvm/devices/vcpu.rst b/Documentation/virt/kvm/devices/vcpu.rst index c8b707afca6e..1da576a4b767 100644 --- a/Documentation/virt/kvm/devices/vcpu.rst +++ b/Documentation/virt/kvm/devices/vcpu.rst @@ -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 -- 2.11.0