[Xen-devel] [RFC PATCH v3 04/18] xen/arm: gicv3: Refactor redistributor information

[vijay.kilari@xxxxxxxxx]

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

Separate redistributor information into rdist and rdist_prop
structures.

The rdist_prop holds the redistributor common information
and rdist holds the per cpu specific information.

This percpu rdist defined as global and shared with ITS
driver

Signed-off-by: Vijaya Kumar K <Vijaya.Kumar@xxxxxxxxxxxxxxxxxx>
---
 xen/arch/arm/gic-v3.c             |   15 ++++++++++-----
 xen/include/asm-arm/gic_v3_defs.h |   15 +++++++++++++++
 2 files changed, 25 insertions(+), 5 deletions(-)

diff --git a/xen/arch/arm/gic-v3.c b/xen/arch/arm/gic-v3.c
index 30682cf..b5c59f6 100644
--- a/xen/arch/arm/gic-v3.c
+++ b/xen/arch/arm/gic-v3.c
@@ -53,6 +53,7 @@ static struct {
     paddr_t dbase;            /* Address of distributor registers */
     paddr_t dbase_size;
     void __iomem *map_dbase;  /* Mapped address of distributor registers */
+    struct rdist_prop rdist_data;
     struct rdist_region *rdist_regions;
     uint32_t  rdist_stride;
     unsigned int rdist_count; /* Number of rdist regions count */
@@ -63,10 +64,10 @@ static struct {
 static struct gic_info gicv3_info;
 
 /* per-cpu re-distributor base */
-static DEFINE_PER_CPU(void __iomem*, rbase);
+DEFINE_PER_CPU(struct rdist, rdist);
 
 #define GICD                   (gicv3.map_dbase)
-#define GICD_RDIST_BASE        (this_cpu(rbase))
+#define GICD_RDIST_BASE        (per_cpu(rdist, smp_processor_id()).rbase)
 #define GICD_RDIST_SGI_BASE    (GICD_RDIST_BASE + SZ_64K)
 
 /*
@@ -613,6 +614,7 @@ static int __init gicv3_populate_rdist(void)
     uint32_t aff;
     uint32_t reg;
     uint64_t typer;
+    uint64_t offset;
     uint64_t mpidr = cpu_logical_map(smp_processor_id());
 
     /*
@@ -648,9 +650,12 @@ static int __init gicv3_populate_rdist(void)
 
             if ( (typer >> 32) == aff )
             {
-                this_cpu(rbase) = ptr;
-                printk("GICv3: CPU%d: Found redistributor in region %d @%p\n",
-                        smp_processor_id(), i, ptr);
+                offset = ptr - gicv3.rdist_regions[i].map_base;
+                per_cpu(rdist, smp_processor_id()).rbase = ptr;
+                per_cpu(rdist, smp_processor_id()).phys_base =  
gicv3.rdist_regions[i].base + offset;
+                printk("GICv3: CPU%d: Found redistributor in region %d 
@%"PRIpaddr"\n",
+                        smp_processor_id(), i,
+                        per_cpu(rdist, smp_processor_id()).phys_base);
                 return 0;
             }
             if ( gicv3.rdist_stride )
diff --git a/xen/include/asm-arm/gic_v3_defs.h 
b/xen/include/asm-arm/gic_v3_defs.h
index 556f114..acbb906 100644
--- a/xen/include/asm-arm/gic_v3_defs.h
+++ b/xen/include/asm-arm/gic_v3_defs.h
@@ -152,6 +152,21 @@
 #define ICH_SGI_IRQ_SHIFT            24
 #define ICH_SGI_IRQ_MASK             0xf
 #define ICH_SGI_TARGETLIST_MASK      0xffff
+
+struct rdist {
+    void __iomem *rbase;
+    void * pend_page;
+    paddr_t phys_base;
+};
+
+struct rdist_prop {
+    void * prop_page;
+    int    id_bits;
+    uint64_t flags;
+};
+
+DECLARE_PER_CPU(struct rdist, rdist);
+
 #endif /* __ASM_ARM_GIC_V3_DEFS_H__ */
 
 /*
-- 
1.7.9.5


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