[Xen-devel] [PATCH v3 35/39] ARM: new VGIC: Add vgic_v2_enable

[Andre Przywara <andre.przywara@xxxxxxxxxx>]

Enable the VGIC operation by properly initialising the registers
in the hypervisor GIC interface.

This is based on Linux commit f7b6985cc3d0, written by Eric Auger.

Signed-off-by: Andre Przywara <andre.przywara@xxxxxxxxxx>
Acked-by: Julien Grall <julien.grall@xxxxxxx>
---
Changelog v2 ... v3:
- replace "1" with "true" in boolean parameter

Changelog v1 ... v2:
- move patch from later part in the series

 xen/arch/arm/vgic/vgic-v2.c | 6 ++++++
 xen/arch/arm/vgic/vgic.h    | 1 +
 2 files changed, 7 insertions(+)

diff --git a/xen/arch/arm/vgic/vgic-v2.c b/xen/arch/arm/vgic/vgic-v2.c
index 8ab0cfe81d..ce77e58857 100644
--- a/xen/arch/arm/vgic/vgic-v2.c
+++ b/xen/arch/arm/vgic/vgic-v2.c
@@ -229,6 +229,12 @@ void vgic_v2_populate_lr(struct vcpu *vcpu, struct 
vgic_irq *irq, int lr)
     gic_hw_ops->write_lr(lr, &lr_val);
 }
 
+void vgic_v2_enable(struct vcpu *vcpu)
+{
+    /* Get the show on the road... */
+    gic_hw_ops->update_hcr_status(GICH_HCR_EN, true);
+}
+
 /*
  * Local variables:
  * mode: C
diff --git a/xen/arch/arm/vgic/vgic.h b/xen/arch/arm/vgic/vgic.h
index a3fcd4d965..112952fbf9 100644
--- a/xen/arch/arm/vgic/vgic.h
+++ b/xen/arch/arm/vgic/vgic.h
@@ -66,6 +66,7 @@ void vgic_sync_hardware_irq(struct domain *d,
 void vgic_v2_fold_lr_state(struct vcpu *vcpu);
 void vgic_v2_populate_lr(struct vcpu *vcpu, struct vgic_irq *irq, int lr);
 void vgic_v2_set_underflow(struct vcpu *vcpu);
+void vgic_v2_enable(struct vcpu *vcpu);
 int vgic_register_dist_iodev(struct domain *d, gfn_t dist_base_fn,
                              enum vgic_type);
 
-- 
2.14.1


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