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| author | Kristina Martsenko | 2017-12-13 18:07:16 +0100 |
|---|---|---|
| committer | Catalin Marinas | 2017-12-22 18:30:33 +0100 |
| commit | 982aa7c5f0861bf56b2412ca341a13f44c238ba4 (patch) | |
| tree | 16d52052e59d5651cdb2f93b2e1cb6ecdba1ee5f /arch/arm64/Kconfig | |
| parent | Linux 4.15-rc3 (diff) | |
| download | kernel-qcow2-linux-982aa7c5f0861bf56b2412ca341a13f44c238ba4.tar.gz kernel-qcow2-linux-982aa7c5f0861bf56b2412ca341a13f44c238ba4.tar.xz kernel-qcow2-linux-982aa7c5f0861bf56b2412ca341a13f44c238ba4.zip | |
arm64: add kconfig symbol to configure physical address size
ARMv8.2 introduces support for 52-bit physical addresses. To prepare for
supporting this, add a new kconfig symbol to configure the physical
address space size. The symbols will be used in subsequent patches.
Currently the only choice is 48, a later patch will add the option of 52
once the required code is in place.
Tested-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Tested-by: Bob Picco <bob.picco@oracle.com>
Reviewed-by: Bob Picco <bob.picco@oracle.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Kristina Martsenko <kristina.martsenko@arm.com>
[catalin.marinas@arm.com: folded minor patches into this one]
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/Kconfig')
| -rw-r--r-- | arch/arm64/Kconfig | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index a93339f5178f..8dc937823eeb 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -646,6 +646,22 @@ config ARM64_VA_BITS default 47 if ARM64_VA_BITS_47 default 48 if ARM64_VA_BITS_48 +choice + prompt "Physical address space size" + default ARM64_PA_BITS_48 + help + Choose the maximum physical address range that the kernel will + support. + +config ARM64_PA_BITS_48 + bool "48-bit" + +endchoice + +config ARM64_PA_BITS + int + default 48 if ARM64_PA_BITS_48 + config CPU_BIG_ENDIAN bool "Build big-endian kernel" help |