diff options
Diffstat (limited to 'arch/arm64/Kconfig')
| -rw-r--r-- | arch/arm64/Kconfig | 45 |
1 files changed, 44 insertions, 1 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 95cda2b..94ba45b 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -157,14 +157,57 @@ endmenu menu "Kernel Features" +choice + prompt "Page size" + default ARM64_4K_PAGES + help + Page size (translation granule) configuration. + +config ARM64_4K_PAGES + bool "4KB" + help + This feature enables 4KB pages support. + config ARM64_64K_PAGES - bool "Enable 64KB pages support" + bool "64KB" help This feature enables 64KB pages support (4KB by default) allowing only two levels of page tables and faster TLB look-up. AArch32 emulation is not available when this feature is enabled. +endchoice + +choice + prompt "Virtual address space size" + default ARM64_VA_BITS_39 if ARM64_4K_PAGES + default ARM64_VA_BITS_42 if ARM64_64K_PAGES + help + Allows choosing one of multiple possible virtual address + space sizes. The level of translation table is determined by + a combination of page size and virtual address space size. + +config ARM64_VA_BITS_39 + bool "39-bit" + depends on ARM64_4K_PAGES + +config ARM64_VA_BITS_42 + bool "42-bit" + depends on ARM64_64K_PAGES + +endchoice + +config ARM64_VA_BITS + int + default 39 if ARM64_VA_BITS_39 + default 42 if ARM64_VA_BITS_42 + +config ARM64_2_LEVELS + def_bool y if ARM64_64K_PAGES && ARM64_VA_BITS_42 + +config ARM64_3_LEVELS + def_bool y if ARM64_4K_PAGES && ARM64_VA_BITS_39 + config CPU_BIG_ENDIAN bool "Build big-endian kernel" help |