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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2017-03-27 16:36:20 +0300 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2017-03-28 17:55:10 +0300 |
| commit | b8402b957d6792f80282fa76e9932ff77a6f0554 (patch) | |
| tree | 7bdc6eafe4dec913bf842165b8ea760bf7a27c80 | |
| parent | fd15a1f333ff5c55be8d3d94ac4c609afe2fd79f (diff) | |
| download | linux-b8402b957d6792f80282fa76e9932ff77a6f0554.tar.xz | |
s390: make MAX_PHYSMEM_BITS configurable
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| -rw-r--r-- | arch/s390/Kconfig | 10 | ||||
| -rw-r--r-- | arch/s390/include/asm/sparsemem.h | 2 |
2 files changed, 11 insertions, 1 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index fc842c4bd720..afac5d89ad1f 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -537,6 +537,16 @@ config FORCE_MAX_ZONEORDER source "mm/Kconfig" +config MAX_PHYSMEM_BITS + int "Maximum size of supported physical memory in bits (42-53)" + range 42 53 + default "46" + help + This option specifies the maximum supported size of physical memory + in bits. Supported is any size between 2^42 (4TB) and 2^53 (8PB). + Increasing the number of bits also increases the kernel image size. + By default 46 bits (64TB) are supported. + config PACK_STACK def_bool y prompt "Pack kernel stack" diff --git a/arch/s390/include/asm/sparsemem.h b/arch/s390/include/asm/sparsemem.h index 487428b6d099..334e279f1bce 100644 --- a/arch/s390/include/asm/sparsemem.h +++ b/arch/s390/include/asm/sparsemem.h @@ -2,6 +2,6 @@ #define _ASM_S390_SPARSEMEM_H #define SECTION_SIZE_BITS 28 -#define MAX_PHYSMEM_BITS 46 +#define MAX_PHYSMEM_BITS CONFIG_MAX_PHYSMEM_BITS #endif /* _ASM_S390_SPARSEMEM_H */ |