[Xen-devel] [PATCH 49/57] ARM: new VGIC: provide system register emulation stub

[Andre Przywara <andre.przywara@xxxxxxxxxx>]

The Xen arch code traps system registers writes from the guest and will
relay anything GIC related to the VGIC.
Since this affects only GICv3 (which we don't yet emulate), provide a
stub implementation of vgic_emulate() for now.

Signed-off-by: Andre Przywara <andre.przywara@xxxxxxxxxx>
---
Changelog RFC ... v1:
- no changes

 xen/arch/arm/vgic/vgic.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/xen/arch/arm/vgic/vgic.c b/xen/arch/arm/vgic/vgic.c
index 2a2b8fd1eb..e1952c872d 100644
--- a/xen/arch/arm/vgic/vgic.c
+++ b/xen/arch/arm/vgic/vgic.c
@@ -813,6 +813,13 @@ struct irq_desc *vgic_get_hw_irq_desc(struct domain *d, 
struct vcpu *v,
     return desc;
 }
 
+bool vgic_emulate(struct cpu_user_regs *regs, union hsr hsr)
+{
+    ASSERT(current->domain->arch.vgic.version == GIC_V3);
+
+    return false;
+}
+
 /*
  * was:
  *      int kvm_vgic_map_phys_irq(struct vcpu *vcpu, u32 virt_irq, u32 
phys_irq)
-- 
2.14.1


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