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KVM: arm64: vgic-its: Introduce new KVM ITS device

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Introduce a new KVM device that represents an ARM Interrupt Translation
Service (ITS) controller. Since there can be multiple of this per guest,
we can't piggy back on the existing GICv3 distributor device, but create
a new type of KVM device.
On the KVM_CREATE_DEVICE ioctl we allocate and initialize the ITS data
structure and store the pointer in the kvm_device data.
Upon an explicit init ioctl from userland (after having setup the MMIO
address) we register the handlers with the kvm_io_bus framework.
Any reference to an ITS thus has to go via this interface.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Tested-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Andre Przywara
2016-07-15 12:43:31 +01:00
committed by Marc Zyngier
parent 59c5ab4098
commit 1085fdc68c
9 changed files with 168 additions and 9 deletions
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3
include/kvm/arm_vgic.h
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@@ -134,6 +134,7 @@ struct vgic_its {
gpa_t vgic_its_base;
bool enabled;
bool initialized;
struct vgic_io_device iodev;
};
@@ -167,6 +168,8 @@ struct vgic_dist {
struct vgic_io_device dist_iodev;
bool has_its;
/*
* Contains the attributes and gpa of the LPI configuration table.
* Since we report GICR_TYPER.CommonLPIAff as 0b00, we can share