Currently, section size is fixed to 1024MB. This change adds a config that would allow it to be customized. This could be useful in reducing kernel memory usage.
Cc: [email protected] Cc: Nikunj Kela <[email protected]> Signed-off-by: Nikunj Kela <[email protected]> --- arch/arm64/Kconfig | 15 +++++++++++++++ arch/arm64/include/asm/sparsemem.h | 2 +- 2 files changed, 16 insertions(+), 1 deletion(-) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 42c090c..edf327f 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -687,6 +687,21 @@ config ARM64_PA_BITS default 48 if ARM64_PA_BITS_48 default 52 if ARM64_PA_BITS_52 +choice + prompt "Section size" + default ARM64_SEC_BITS_30 + help + Choose the maximum amount of memory in a section. + +config ARM64_SEC_BITS_30 + bool "30-bit" + +endchoice + +config ARM64_SEC_BITS + int + default 30 if ARM64_SEC_BITS_30 + config CPU_BIG_ENDIAN bool "Build big-endian kernel" help diff --git a/arch/arm64/include/asm/sparsemem.h b/arch/arm64/include/asm/sparsemem.h index b299929..dc8fb4b 100644 --- a/arch/arm64/include/asm/sparsemem.h +++ b/arch/arm64/include/asm/sparsemem.h @@ -18,7 +18,7 @@ #ifdef CONFIG_SPARSEMEM #define MAX_PHYSMEM_BITS CONFIG_ARM64_PA_BITS -#define SECTION_SIZE_BITS 30 +#define SECTION_SIZE_BITS CONFIG_ARM64_SEC_BITS #endif #endif -- 2.5.0
