[Xen-devel] [PATCH WIP v1 03/10] xen: arm: add platform hook for routing IRQ to guests

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

Tegra contains a secondary set of IRQ registers which dom0 wants to poke at, we
will use this for that.

Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
---
 xen/arch/arm/irq.c             | 4 ++++
 xen/arch/arm/platform.c        | 6 ++++++
 xen/include/asm-arm/platform.h | 5 +++++
 3 files changed, 15 insertions(+)

diff --git a/xen/arch/arm/irq.c b/xen/arch/arm/irq.c
index cb9c99b..c574b92 100644
--- a/xen/arch/arm/irq.c
+++ b/xen/arch/arm/irq.c
@@ -27,6 +27,7 @@
 
 #include <asm/gic.h>
 #include <asm/vgic.h>
+#include <asm/platform.h>
 
 static unsigned int local_irqs_type[NR_LOCAL_IRQS];
 static DEFINE_SPINLOCK(local_irqs_type_lock);
@@ -423,6 +424,9 @@ int route_irq_to_guest(struct domain *d, unsigned int irq,
 
     gic_route_irq_to_guest(d, desc, cpumask_of(smp_processor_id()),
                            GIC_PRI_IRQ);
+
+    platform_route_irq_to_guest(d, desc);
+
     spin_unlock_irqrestore(&desc->lock, flags);
     return 0;
 
diff --git a/xen/arch/arm/platform.c b/xen/arch/arm/platform.c
index 86daf2b..c58e251 100644
--- a/xen/arch/arm/platform.c
+++ b/xen/arch/arm/platform.c
@@ -160,6 +160,12 @@ bool_t platform_device_is_blacklisted(const struct 
dt_device_node *node)
     return (dt_match_node(blacklist, node) != NULL);
 }
 
+void platform_route_irq_to_guest(struct domain *d, struct irq_desc *desc)
+{
+    if ( platform && platform->route_irq_to_guest )
+        platform->route_irq_to_guest(d, desc);
+}
+
 void platform_dom0_gnttab(paddr_t *start, paddr_t *size)
 {
     if ( platform && platform->dom0_gnttab_size )
diff --git a/xen/include/asm-arm/platform.h b/xen/include/asm-arm/platform.h
index 4eba37b..22d1f8b 100644
--- a/xen/include/asm-arm/platform.h
+++ b/xen/include/asm-arm/platform.h
@@ -26,6 +26,9 @@ struct platform_desc {
     void (*reset)(void);
     /* Platform power-off */
     void (*poweroff)(void);
+
+    void (*route_irq_to_guest)(struct domain *d, struct irq_desc *);
+
     /*
      * Platform quirks
      * Defined has a function because a platform can support multiple
@@ -70,6 +73,8 @@ bool_t platform_device_is_blacklisted(const struct 
dt_device_node *node);
 unsigned int platform_dom0_evtchn_ppi(void);
 void platform_dom0_gnttab(paddr_t *start, paddr_t *size);
 
+void platform_route_irq_to_guest(struct domain *, struct irq_desc *);
+
 #define PLATFORM_START(_name, _namestr)                         \
 static const struct platform_desc  __plat_desc_##_name __used   \
 __attribute__((__section__(".arch.info"))) = {                  \
-- 
2.1.4


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