Using the framework provided by the recent vgic.c changes we register
a kvm_io_bus device when initializing the virtual GICv2.
Signed-off-by: Andre Przywara <andre.przyw...@arm.com>
---
include/kvm/arm_vgic.h | 1 +
virt/kvm/arm/vgic-v2-emul.c | 13 +++++++++----
virt/kvm/arm/vgic.c | 17 +++++++++++++++++
3 files changed, 27 insertions(+), 4 deletions(-)
diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h
index f90140c..4523984 100644
--- a/include/kvm/arm_vgic.h
+++ b/include/kvm/arm_vgic.h
@@ -251,6 +251,7 @@ struct vgic_dist {
unsigned long *irq_active_on_cpu;
struct vgic_vm_ops vm_ops;
+ struct vgic_io_device dist_iodev;
};
struct vgic_v2_cpu_if {
diff --git a/virt/kvm/arm/vgic-v2-emul.c b/virt/kvm/arm/vgic-v2-emul.c
index 1dd183e..69f27c8 100644
--- a/virt/kvm/arm/vgic-v2-emul.c
+++ b/virt/kvm/arm/vgic-v2-emul.c
@@ -506,6 +506,7 @@ static bool vgic_v2_queue_sgi(struct kvm_vcpu *vcpu, int
irq)
static int vgic_v2_map_resources(struct kvm *kvm,
const struct vgic_params *params)
{
+ struct vgic_dist *dist = &kvm->arch.vgic;
int ret = 0;
if (!irqchip_in_kernel(kvm))
@@ -516,13 +517,17 @@ static int vgic_v2_map_resources(struct kvm *kvm,
if (vgic_ready(kvm))
goto out;
- if (IS_VGIC_ADDR_UNDEF(kvm->arch.vgic.vgic_dist_base) ||
- IS_VGIC_ADDR_UNDEF(kvm->arch.vgic.vgic_cpu_base)) {
+ if (IS_VGIC_ADDR_UNDEF(dist->vgic_dist_base) ||
+ IS_VGIC_ADDR_UNDEF(dist->vgic_cpu_base)) {
kvm_err("Need to set vgic cpu and dist addresses first\n");
ret = -ENXIO;
goto out;
}
+ vgic_register_kvm_io_dev(kvm, dist->vgic_dist_base,
+ KVM_VGIC_V2_DIST_SIZE,
+ vgic_dist_ranges, -1, &dist->dist_iodev);
+
/*
* Initialize the vgic if this hasn't already been done on demand by
* accessing the vgic state from userspace.
@@ -533,7 +538,7 @@ static int vgic_v2_map_resources(struct kvm *kvm,
goto out;
}
- ret = kvm_phys_addr_ioremap(kvm, kvm->arch.vgic.vgic_cpu_base,
+ ret = kvm_phys_addr_ioremap(kvm, dist->vgic_cpu_base,
params->vcpu_base, KVM_VGIC_V2_CPU_SIZE,
true);
if (ret) {
@@ -541,7 +546,7 @@ static int vgic_v2_map_resources(struct kvm *kvm,
goto out;
}
- kvm->arch.vgic.ready = true;
+ dist->ready = true;
out:
if (ret)
kvm_vgic_destroy(kvm);
diff --git a/virt/kvm/arm/vgic.c b/virt/kvm/arm/vgic.c
index e968179..9a732d0 100644
--- a/virt/kvm/arm/vgic.c
+++ b/virt/kvm/arm/vgic.c
@@ -989,6 +989,21 @@ int vgic_register_kvm_io_dev(struct kvm *kvm, gpa_t base,
int len,
return ret;
}
+static void vgic_unregister_kvm_io_dev(struct kvm *kvm)
+{
+ struct vgic_dist *dist = &kvm->arch.vgic;
+
+ if (!dist || !kvm->buses[KVM_MMIO_BUS])
+ return;
+
+ mutex_lock(&kvm->slots_lock);
+ /* We could get here without ever having registered a device. */
+ if (dist->dist_iodev.dev.ops)
+ kvm_io_bus_unregister_dev(kvm, KVM_MMIO_BUS,
+ &dist->dist_iodev.dev);
+ mutex_unlock(&kvm->slots_lock);
+}
+
static int vgic_nr_shared_irqs(struct vgic_dist *dist)
{
return dist->nr_irqs - VGIC_NR_PRIVATE_IRQS;
@@ -1705,6 +1720,8 @@ void kvm_vgic_destroy(struct kvm *kvm)
struct kvm_vcpu *vcpu;
int i;
+ vgic_unregister_kvm_io_dev(kvm);
+
kvm_for_each_vcpu(i, vcpu, kvm)
kvm_vgic_vcpu_destroy(vcpu);
--
1.7.9.5
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