[PATCH] xen/arm: Add Kconfig parameter for memory banks number

[Luca Fancellu <luca.fancellu@xxxxxxx>]

Currently the maximum number of memory banks is fixed to
128, but on some new platforms that have a large amount
of memory, this value is not enough and prevents Xen
from booting.

Create a Kconfig parameter to set the value, by default
128.

Signed-off-by: Luca Fancellu <luca.fancellu@xxxxxxx>
---
 xen/arch/arm/Kconfig        | 8 ++++++++
 xen/include/asm-arm/setup.h | 2 +-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/xen/arch/arm/Kconfig b/xen/arch/arm/Kconfig
index ecfa6822e4d3..805e3c417e89 100644
--- a/xen/arch/arm/Kconfig
+++ b/xen/arch/arm/Kconfig
@@ -25,6 +25,14 @@ menu "Architecture Features"
 
 source "arch/Kconfig"
 
+config MEM_BANKS
+       int "Maximum number of memory banks."
+       default "128"
+       help
+         Controls the build-time size memory bank array.
+         It is the upper bound of the number of logical entities describing
+         the memory.
+
 config ACPI
        bool "ACPI (Advanced Configuration and Power Interface) Support 
(UNSUPPORTED)" if UNSUPPORTED
        depends on ARM_64
diff --git a/xen/include/asm-arm/setup.h b/xen/include/asm-arm/setup.h
index 95da0b7ab9cd..785a8fe81450 100644
--- a/xen/include/asm-arm/setup.h
+++ b/xen/include/asm-arm/setup.h
@@ -6,7 +6,7 @@
 #define MIN_FDT_ALIGN 8
 #define MAX_FDT_SIZE SZ_2M
 
-#define NR_MEM_BANKS 128
+#define NR_MEM_BANKS CONFIG_MEM_BANKS
 
 #define MAX_MODULES 32 /* Current maximum useful modules */
 
-- 
2.17.1