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GICv5 systems will likely not support the full set of PPIs. The presence of any virtual PPI is tied to the presence of the physical PPI. Therefore, the available PPIs will be limited by the physical host. Userspace cannot drive any PPIs that are not implemented. Moreover, it is not desirable to expose all PPIs to the guest in the first place, even if they are supported in hardware. Some devices, such as the arch timer, are implemented in KVM, and hence those PPIs shouldn't be driven by userspace, either. Provided a new UAPI: KVM_DEV_ARM_VGIC_GRP_CTRL => KVM_DEV_ARM_VGIC_USERPSPACE_PPIs This allows userspace to query which PPIs it is able to drive via KVM_IRQ_LINE. Additionally, introduce a check in kvm_vm_ioctl_irq_line() to reject any PPIs not in the userspace mask. Signed-off-by: Sascha Bischoff <sascha.bischoff@arm.com> Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com> Link: https://patch.msgid.link/20260319154937.3619520-40-sascha.bischoff@arm.com Signed-off-by: Marc Zyngier <maz@kernel.org>
This directory contains specific device bindings for KVM_CAP_DEVICE_CTRL.