[Xen-devel] [RFC PATCH v3 01/24] NUMA: Make number of NUMA nodes configurable

[vijay.kilari@xxxxxxxxx]

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

Introduce NR_NODES config option to specify number
of NUMA nodes supported. By default value is set at
64 for x86 and 8 for arm. Dropped NODES_SHIFT macro.

Also move NR_NODE_MEMBLKS from asm-x86/acpi.h to xen/numa.h

Signed-off-by: Vijaya Kumar K <Vijaya.Kumar@xxxxxxxxxx>
---
 xen/arch/Kconfig           | 7 +++++++
 xen/include/asm-x86/acpi.h | 1 -
 xen/include/asm-x86/numa.h | 2 --
 xen/include/xen/config.h   | 1 +
 xen/include/xen/numa.h     | 7 ++-----
 5 files changed, 10 insertions(+), 8 deletions(-)

diff --git a/xen/arch/Kconfig b/xen/arch/Kconfig
index cf0acb7..9c2a4e2 100644
--- a/xen/arch/Kconfig
+++ b/xen/arch/Kconfig
@@ -6,3 +6,10 @@ config NR_CPUS
        default "128" if ARM
        ---help---
          Specifies the maximum number of physical CPUs which Xen will support.
+
+config NR_NODES
+       int "Maximum number of NUMA nodes"
+       default "64" if X86
+       default "8" if ARM
+       ---help---
+         Specifies the maximum number of NUMA nodes which Xen will support.
diff --git a/xen/include/asm-x86/acpi.h b/xen/include/asm-x86/acpi.h
index 27ecc65..15be784 100644
--- a/xen/include/asm-x86/acpi.h
+++ b/xen/include/asm-x86/acpi.h
@@ -105,7 +105,6 @@ extern void acpi_reserve_bootmem(void);
 
 extern s8 acpi_numa;
 extern int acpi_scan_nodes(u64 start, u64 end);
-#define NR_NODE_MEMBLKS (MAX_NUMNODES*2)
 
 #ifdef CONFIG_ACPI_SLEEP
 
diff --git a/xen/include/asm-x86/numa.h b/xen/include/asm-x86/numa.h
index bada2c0..3cf26c2 100644
--- a/xen/include/asm-x86/numa.h
+++ b/xen/include/asm-x86/numa.h
@@ -3,8 +3,6 @@
 
 #include <xen/cpumask.h>
 
-#define NODES_SHIFT 6
-
 typedef u8 nodeid_t;
 
 extern int srat_rev;
diff --git a/xen/include/xen/config.h b/xen/include/xen/config.h
index a1d0f97..0f1a029 100644
--- a/xen/include/xen/config.h
+++ b/xen/include/xen/config.h
@@ -81,6 +81,7 @@
 
 /* allow existing code to work with Kconfig variable */
 #define NR_CPUS CONFIG_NR_CPUS
+#define NR_NODES CONFIG_NR_NODES
 
 #ifndef CONFIG_DEBUG
 #define NDEBUG
diff --git a/xen/include/xen/numa.h b/xen/include/xen/numa.h
index 7aef1a8..6bba29e 100644
--- a/xen/include/xen/numa.h
+++ b/xen/include/xen/numa.h
@@ -3,14 +3,11 @@
 
 #include <asm/numa.h>
 
-#ifndef NODES_SHIFT
-#define NODES_SHIFT     0
-#endif
-
 #define NUMA_NO_NODE     0xFF
 #define NUMA_NO_DISTANCE 0xFF
 
-#define MAX_NUMNODES    (1 << NODES_SHIFT)
+#define MAX_NUMNODES    NR_NODES
+#define NR_NODE_MEMBLKS (MAX_NUMNODES * 2)
 
 #define vcpu_to_node(v) (cpu_to_node((v)->processor))
 
-- 
2.7.4


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