[RFC PATCH 20/45] KVM: arm/arm64: vgic-new: Add TARGET registers handlers

[Andre Przywara]

Signed-off-by: Andre Przywara <andre.przywara at arm.com>
---
 virt/kvm/arm/vgic/vgic_mmio.c | 43 ++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 42 insertions(+), 1 deletion(-)

diff --git a/virt/kvm/arm/vgic/vgic_mmio.c b/virt/kvm/arm/vgic/vgic_mmio.c
index 76657ce..cde153f 100644
--- a/virt/kvm/arm/vgic/vgic_mmio.c
+++ b/virt/kvm/arm/vgic/vgic_mmio.c
@@ -471,6 +471,47 @@ static int vgic_mmio_write_config(struct kvm_vcpu *vcpu,
 	return 0;
 }
 
+static int vgic_mmio_read_target(struct kvm_vcpu *vcpu,
+				 struct kvm_io_device *this,
+				 gpa_t addr, int len, void *val)
+{
+	struct vgic_io_device *iodev = container_of(this,
+						    struct vgic_io_device, dev);
+	u32 intid = (addr - iodev->base_addr);
+	int i;
+
+	if (iodev->redist_vcpu)
+		vcpu = iodev->redist_vcpu;
+
+	for (i = 0; i < len; i++) {
+		struct vgic_irq *irq = vgic_get_irq(vcpu->kvm, vcpu, intid + i);
+
+		((u8 *)val)[i] = irq->targets;
+	}
+
+	return 0;
+}
+
+static int vgic_mmio_write_target(struct kvm_vcpu *vcpu,
+				  struct kvm_io_device *this,
+				  gpa_t addr, int len, const void *val)
+{
+	struct vgic_io_device *iodev = container_of(this,
+						    struct vgic_io_device, dev);
+	u32 intid = (addr - iodev->base_addr);
+	int i;
+
+	/* GICD_ITARGETSR[0-7] are read-only */
+	if (intid < VGIC_NR_PRIVATE_IRQS)
+		return 0;
+
+	for (i = 0; i < len; i++)
+		vgic_v2_irq_change_affinity(vcpu->kvm, intid + i,
+					    ((u8 *)val)[i]);
+
+	return 0;
+}
+
 struct vgic_register_region vgic_v2_dist_registers[] = {
 	REGISTER_DESC_WITH_LENGTH(GIC_DIST_CTRL,
 		vgic_mmio_read_v2_misc, vgic_mmio_write_v2_misc, 12),
@@ -491,7 +532,7 @@ struct vgic_register_region vgic_v2_dist_registers[] = {
 	REGISTER_DESC_WITH_BITS_PER_IRQ(GIC_DIST_PRI,
 		vgic_mmio_read_priority, vgic_mmio_write_priority, 8),
 	REGISTER_DESC_WITH_BITS_PER_IRQ(GIC_DIST_TARGET,
-		vgic_mmio_read_nyi, vgic_mmio_write_nyi, 8),
+		vgic_mmio_read_target, vgic_mmio_write_target, 8),
 	REGISTER_DESC_WITH_BITS_PER_IRQ(GIC_DIST_CONFIG,
 		vgic_mmio_read_config, vgic_mmio_write_config, 2),
 	REGISTER_DESC_WITH_LENGTH(GIC_DIST_SOFTINT,
-- 
2.7.3