From 4493b1c4866a03963a35be7d157c911a617a3694 Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Tue, 26 Apr 2016 11:06:12 +0100 Subject: KVM: arm/arm64: vgic-new: Add MMIO handling framework Add an MMIO handling framework to the VGIC emulation: Each register is described by its offset, size (or number of bits per IRQ, if applicable) and the read/write handler functions. We provide initialization macros to describe each GIC register later easily. Separate dispatch functions for read and write accesses are connected to the kvm_io_bus framework and binary-search for the responsible register handler based on the offset address within the region. We convert the incoming data (referenced by a pointer) to the host's endianess and use pass-by-value to hand the data over to the actual handler functions. The register handler prototype and the endianess conversion are courtesy of Christoffer Dall. Signed-off-by: Marc Zyngier Signed-off-by: Christoffer Dall Signed-off-by: Andre Przywara Reviewed-by: Christoffer Dall --- include/kvm/vgic/vgic.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'include') diff --git a/include/kvm/vgic/vgic.h b/include/kvm/vgic/vgic.h index f663288..ff3f9c2 100644 --- a/include/kvm/vgic/vgic.h +++ b/include/kvm/vgic/vgic.h @@ -106,6 +106,16 @@ struct vgic_irq { enum vgic_irq_config config; /* Level or edge */ }; +struct vgic_register_region; + +struct vgic_io_device { + gpa_t base_addr; + struct kvm_vcpu *redist_vcpu; + const struct vgic_register_region *regions; + int nr_regions; + struct kvm_io_device dev; +}; + struct vgic_dist { bool in_kernel; bool ready; @@ -132,6 +142,9 @@ struct vgic_dist { bool enabled; struct vgic_irq *spis; + + struct vgic_io_device dist_iodev; + struct vgic_io_device *redist_iodevs; }; struct vgic_v2_cpu_if { -- cgit v1.1