[Xen-devel,RFC,42/49] ARM: new VGIC: provide system register emulation stub

Message ID 20180209143937.28866-43-andre.przywara@linaro.org
State New
Headers show
Series
  • New VGIC(-v2) implementation
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Commit Message

Andre Przywara Feb. 9, 2018, 2:39 p.m.
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@linaro.org>
---
 xen/arch/arm/vgic/vgic.c | 7 +++++++
 1 file changed, 7 insertions(+)

Patch

diff --git a/xen/arch/arm/vgic/vgic.c b/xen/arch/arm/vgic/vgic.c
index 97ffdba5ad..d91028bd43 100644
--- a/xen/arch/arm/vgic/vgic.c
+++ b/xen/arch/arm/vgic/vgic.c
@@ -790,6 +790,13 @@  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)