[PATCH 10/21] X86_64, UV: Create per cpu info structs to replace per hub info structs

[Mike Travis]

The major portion of the hub info is common to all cpus on that hub.
This is step one of moving the per cpu hub info to a per node hub info
struct.  This patch creates the small per cpu info struct that will
contain only information specific to each CPU.

Signed-off-by: Mike Travis <travis@xxxxxxx>
Reviewed-by: Dimitri Sivanich <sivanich@xxxxxxx>
Tested-by: John Estabrook <estabrook@xxxxxxx>
Tested-by: Gary Kroening <gfk@xxxxxxx>
Tested-by: Nathan Zimmer <nzimmer@xxxxxxx>
---
 arch/x86/include/asm/uv/uv_hub.h   |   19 +++++++++++++++----
 arch/x86/kernel/apic/x2apic_uv_x.c |   15 ++++++++++-----
 2 files changed, 25 insertions(+), 9 deletions(-)

--- linux.orig/arch/x86/include/asm/uv/uv_hub.h
+++ linux/arch/x86/include/asm/uv/uv_hub.h
@@ -139,8 +139,9 @@ struct uv_scir_s {
 
 /*
  * The following defines attributes of the HUB chip. These attributes are
- * frequently referenced and are kept in the per-cpu data areas of each cpu.
- * They are kept together in a struct to minimize cache misses.
+ * frequently referenced and are kept in a common per hub struct.
+ * After setup, the struct is read only, so it should be readily
+ * available in the L3 cache on the cpu socket for the node.
  */
 struct uv_hub_info_s {
 	unsigned long		global_mmr_base;
@@ -167,9 +168,19 @@ DECLARE_PER_CPU(struct uv_hub_info_s, __
 #define uv_hub_info		this_cpu_ptr(&__uv_hub_info)
 #define uv_cpu_hub_info(cpu)	(&per_cpu(__uv_hub_info, cpu))
 
+/* CPU specific info with a pointer to the hub common info struct */
+struct uv_cpu_info_s {
+	void			*p_uv_hub_info;
+	unsigned char		blade_cpu_id;
+	struct uv_scir_s	scir;
+};
+DECLARE_PER_CPU(struct uv_cpu_info_s, __uv_cpu_info);
+
+#define uv_cpu_info		this_cpu_ptr(&__uv_cpu_info)
+#define uv_cpu_info_per(cpu)	(&per_cpu(__uv_cpu_info, cpu))
+
 /*
- * Hub revisions less than UV2_HUB_REVISION_BASE are UV1 hubs. All UV2
- * hubs have revision numbers greater than or equal to UV2_HUB_REVISION_BASE.
+ * HUB revision ranges for each UV HUB architecture.
  * This is a software convention - NOT the hardware revision numbers in
  * the hub chip.
  */
--- linux.orig/arch/x86/kernel/apic/x2apic_uv_x.c
+++ linux/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -238,6 +238,9 @@ EXPORT_SYMBOL_GPL(is_uv_system);
 DEFINE_PER_CPU(struct uv_hub_info_s, __uv_hub_info);
 EXPORT_PER_CPU_SYMBOL_GPL(__uv_hub_info);
 
+DEFINE_PER_CPU(struct uv_cpu_info_s, __uv_cpu_info);
+EXPORT_PER_CPU_SYMBOL_GPL(__uv_cpu_info);
+
 struct uv_blade_info *uv_blade_info;
 EXPORT_SYMBOL_GPL(uv_blade_info);
 
@@ -1010,11 +1013,10 @@ void __init uv_system_init(void)
 		  hweight64(uv_read_local_mmr( UVH_NODE_PRESENT_TABLE + i * 8));
 
 	/* uv_num_possible_blades() is really the hub count */
-	pr_info("UV: Found %d blades, %d hubs\n",
-			is_uv1_hub() ?
-				uv_num_possible_blades() :
-				(uv_num_possible_blades() + 1) / 2,
-			uv_num_possible_blades());
+	pr_info("UV: Found %d hubs, %d nodes, %d cpus\n",
+			uv_num_possible_blades(),
+			num_possible_nodes(),
+			num_possible_cpus());
 
 	bytes = sizeof(struct uv_blade_info) * uv_num_possible_blades();
 	uv_blade_info = kzalloc(bytes, GFP_KERNEL);
@@ -1077,6 +1079,9 @@ void __init uv_system_init(void)
 		uv_cpu_hub_info(cpu)->blade_processor_id = lcpu;
 		uv_node_to_blade[nodeid] = blade;
 		uv_cpu_to_blade[cpu] = blade;
+
+		/* Initialize per cpu info list */
+		uv_cpu_info_per(cpu)->p_uv_hub_info = uv_cpu_hub_info(cpu);
 	}
 
 	/* Add blade/pnode info for nodes without cpus */

--