[Xen-devel] [PATCH v5 13/22] xen/arm: ITS: Implement gic_is_lpi helper function

[vijay.kilari@xxxxxxxxx]

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

Helper function gic_is_lpi() is used to find
if irq is lpi or not. For GICv2 platforms this function
returns 0.

Signed-off-by: Vijaya Kumar K <Vijaya.Kumar@xxxxxxxxxxxxxxxxxx>
---
 xen/arch/arm/gic-hip04.c  |    6 ++++++
 xen/arch/arm/gic-v2.c     |    6 ++++++
 xen/arch/arm/gic-v3.c     |    6 ++++++
 xen/arch/arm/gic.c        |    5 +++++
 xen/include/asm-arm/gic.h |    2 ++
 5 files changed, 25 insertions(+)

diff --git a/xen/arch/arm/gic-hip04.c b/xen/arch/arm/gic-hip04.c
index c5ed545..fdd428a 100644
--- a/xen/arch/arm/gic-hip04.c
+++ b/xen/arch/arm/gic-hip04.c
@@ -87,6 +87,11 @@ static DEFINE_PER_CPU(u16, gic_cpu_id);
 #define HIP04_GICH_APR   0x70
 #define HIP04_GICH_LR    0x80
 
+static bool_t hip04gic_is_lpi(unsigned int irq)
+{
+    return 0;
+}
+
 static inline void writeb_gicd(uint8_t val, unsigned int offset)
 {
     writeb_relaxed(val, gicv2.map_dbase + offset);
@@ -727,6 +732,7 @@ const static struct gic_hw_operations hip04gic_ops = {
     .read_vmcr_priority  = hip04gic_read_vmcr_priority,
     .read_apr            = hip04gic_read_apr,
     .make_hwdom_dt_node  = hip04gic_make_hwdom_dt_node,
+    .is_lpi              = hip04gic_is_lpi,
 };
 
 /* Set up the GIC */
diff --git a/xen/arch/arm/gic-v2.c b/xen/arch/arm/gic-v2.c
index 596126d..5cc2bca 100644
--- a/xen/arch/arm/gic-v2.c
+++ b/xen/arch/arm/gic-v2.c
@@ -81,6 +81,11 @@ static DEFINE_PER_CPU(u8, gic_cpu_id);
 /* Maximum cpu interface per GIC */
 #define NR_GIC_CPU_IF 8
 
+static bool_t gicv2_is_lpi(unsigned int irq)
+{
+    return 0;
+}
+
 static inline void writeb_gicd(uint8_t val, unsigned int offset)
 {
     writeb_relaxed(val, gicv2.map_dbase + offset);
@@ -713,6 +718,7 @@ const static struct gic_hw_operations gicv2_ops = {
     .read_vmcr_priority  = gicv2_read_vmcr_priority,
     .read_apr            = gicv2_read_apr,
     .make_hwdom_dt_node  = gicv2_make_hwdom_dt_node,
+    .is_lpi              = gicv2_is_lpi,
 };
 
 /* Set up the GIC */
diff --git a/xen/arch/arm/gic-v3.c b/xen/arch/arm/gic-v3.c
index 91c1b74..3b4dea3 100644
--- a/xen/arch/arm/gic-v3.c
+++ b/xen/arch/arm/gic-v3.c
@@ -62,6 +62,11 @@ DEFINE_PER_CPU(struct rdist, rdist);
 #define GICD_RDIST_BASE        (this_cpu(rdist).rbase)
 #define GICD_RDIST_SGI_BASE    (GICD_RDIST_BASE + SZ_64K)
 
+static bool_t gicv3_is_lpi(u32 irq)
+{
+    return (irq >= FIRST_GIC_LPI && irq < (1 << gicv3_info.nr_id_bits));
+}
+
 /*
  * Saves all 16(Max) LR registers. Though number of LRs implemented
  * is implementation specific.
@@ -1316,6 +1321,7 @@ static const struct gic_hw_operations gicv3_ops = {
     .read_apr            = gicv3_read_apr,
     .secondary_init      = gicv3_secondary_cpu_init,
     .make_hwdom_dt_node  = gicv3_make_hwdom_dt_node,
+    .is_lpi              = gicv3_is_lpi,
 };
 
 static int __init gicv3_preinit(struct dt_device_node *node, const void *data)
diff --git a/xen/arch/arm/gic.c b/xen/arch/arm/gic.c
index af8a34b..cb4cdc8 100644
--- a/xen/arch/arm/gic.c
+++ b/xen/arch/arm/gic.c
@@ -62,6 +62,11 @@ enum gic_version gic_hw_version(void)
    return gic_hw_ops->info->hw_version;
 }
 
+bool_t gic_is_lpi(unsigned int irq)
+{
+    return gic_hw_ops->is_lpi(irq);
+}
+
 unsigned int gic_number_lines(void)
 {
     return gic_hw_ops->info->nr_lines;
diff --git a/xen/include/asm-arm/gic.h b/xen/include/asm-arm/gic.h
index a9a5874..f80f291 100644
--- a/xen/include/asm-arm/gic.h
+++ b/xen/include/asm-arm/gic.h
@@ -359,12 +359,14 @@ struct gic_hw_operations {
     int (*secondary_init)(void);
     int (*make_hwdom_dt_node)(const struct domain *d,
                               const struct dt_device_node *node, void *fdt);
+    bool_t (*is_lpi)(unsigned int irq);
 };
 
 void register_gic_ops(const struct gic_hw_operations *ops);
 int gic_make_hwdom_dt_node(const struct domain *d,
                            const struct dt_device_node *node,
                            void *fdt);
+bool_t gic_is_lpi(unsigned int irq);
 
 #endif /* __ASSEMBLY__ */
 #endif
-- 
1.7.9.5


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