[Xen-devel] [RFC PATCH 09/19] xen/arm: Update irq descriptor for LPIs support

[vijay.kilari@xxxxxxxxx]

From: Vijaya Kumar K <Vijaya.Kumar@xxxxxxxxxxxxxxxxxx>

Introduce new fields in irq descriptors for
LPI support. data field to hold irq related data
and virq to hold virtual lpi number for the corresponding
irq

Signed-off-by: Vijaya Kumar K <Vijaya.Kumar@xxxxxxxxxxxxxxxxxx>
---
 xen/arch/arm/irq.c        |   18 ++++++++++++++++++
 xen/include/asm-arm/irq.h |    3 ++-
 xen/include/xen/irq.h     |    2 ++
 3 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/xen/arch/arm/irq.c b/xen/arch/arm/irq.c
index cb9c99b..d52ee0c 100644
--- a/xen/arch/arm/irq.c
+++ b/xen/arch/arm/irq.c
@@ -89,6 +89,7 @@ static int __cpuinit init_local_irq_data(void)
         init_one_irq_desc(desc);
         desc->irq = irq;
         desc->action  = NULL;
+        desc->data = NULL;
 
         /* PPIs are included in local_irqs, we copy the IRQ type from
          * local_irqs_type when bringing up local IRQ for this CPU in
@@ -104,6 +105,23 @@ static int __cpuinit init_local_irq_data(void)
     return 0;
 }
 
+int irq_set_desc_data(unsigned int irq, void *d)
+{
+    unsigned long flags;
+    struct irq_desc *desc = irq_to_desc(irq);
+
+    spin_lock_irqsave(&desc->lock, flags);
+    desc->data = d;
+    spin_unlock_irqrestore(&desc->lock, flags);
+
+    return 0;
+}
+
+void *irq_get_desc_data(struct irq_desc *d)
+{
+    return d->data;
+}
+
 void __init init_IRQ(void)
 {
     int irq;
diff --git a/xen/include/asm-arm/irq.h b/xen/include/asm-arm/irq.h
index 435dfcd..de029e4 100644
--- a/xen/include/asm-arm/irq.h
+++ b/xen/include/asm-arm/irq.h
@@ -46,7 +46,8 @@ void arch_move_irqs(struct vcpu *v);
 
 /* Set IRQ type for an SPI */
 int irq_set_spi_type(unsigned int spi, unsigned int type);
-
+int irq_set_desc_data(unsigned int irq, void *d);
+void *irq_get_desc_data(struct irq_desc *d);
 int platform_get_irq(const struct dt_device_node *device, int index);
 
 void irq_set_affinity(struct irq_desc *desc, const cpumask_t *cpu_mask);
diff --git a/xen/include/xen/irq.h b/xen/include/xen/irq.h
index 9e0155c..f12afac 100644
--- a/xen/include/xen/irq.h
+++ b/xen/include/xen/irq.h
@@ -91,6 +91,8 @@ typedef struct irq_desc {
     spinlock_t lock;
     struct arch_irq_desc arch;
     cpumask_var_t affinity;
+    void *data;   /* IRQ specific data */
+    int virq;     /* Used to store vlpi */
 
     /* irq ratelimit */
     s_time_t rl_quantum_start;
-- 
1.7.9.5


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