Currently on arm64, memory section size is hard-coded to 1GB. Make this configurable if memory-hotplug is enabled, to support more finer granularity for hotplug-able memory. Signed-off-by: Sudarshan Rajagopalan <sudaraja@xxxxxxxxxxxxxx> --- arch/arm64/Kconfig | 11 +++++++++++ arch/arm64/include/asm/sparsemem.h | 4 ++++ 2 files changed, 15 insertions(+) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 6d232837cbee..34124eee65da 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -294,6 +294,17 @@ config ARCH_ENABLE_MEMORY_HOTREMOVE config SMP def_bool y +config HOTPLUG_SIZE_BITS + int "Memory hotplug block size(29 => 512MB 30 => 1GB)" + depends on SPARSEMEM + depends on MEMORY_HOTPLUG + range 28 30 + default 30 + help + Selects granularity of hotplug memory. Block size for + memory hotplug is represent as a power of 2. + If unsure, stick with default value. + config KERNEL_MODE_NEON def_bool y diff --git a/arch/arm64/include/asm/sparsemem.h b/arch/arm64/include/asm/sparsemem.h index 1f43fcc79738..3d5310f3aad5 100644 --- a/arch/arm64/include/asm/sparsemem.h +++ b/arch/arm64/include/asm/sparsemem.h @@ -7,7 +7,11 @@ #ifdef CONFIG_SPARSEMEM #define MAX_PHYSMEM_BITS CONFIG_ARM64_PA_BITS +#ifndef CONFIG_MEMORY_HOTPLUG #define SECTION_SIZE_BITS 30 +#else +#define SECTION_SIZE_BITS CONFIG_HOTPLUG_SIZE_BITS +#endif #endif #endif -- Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project
