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arm64: defconfig: Enable LPA2 support

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We typically enable support in defconfig for all architectural features
for which we can detect at runtime if the hardware actually supports
them.

Now that we have implemented support for LPA2 based 52-bit virtual
addressing in a way that should not impact 48-bit operation on non-LPA2
CPU, we can do the same, and enable 52-bit virtual addressing by
default.

Catalin adds:

  Currently the "Virtual address space size" arch/arm64/Kconfig menu
  entry sets different defaults for each page size. However, all are
  overridden by the defconfig to 48 bits. Set the new default in
  Kconfig and remove the defconfig line.

[ardb: squash follow-up fix from Catalin]

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20240214122845.2033971-86-ardb+git@google.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Ard Biesheuvel 2024-02-14 13:29:27 +01:00 committed by Catalin Marinas
parent 352b0395b5
commit 5d10165422
2 changed files with 1 additions and 4 deletions
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4
arch/arm64/Kconfig
View File

@ -1283,9 +1283,7 @@ endchoice
choice
prompt "Virtual address space size"
default ARM64_VA_BITS_39 if ARM64_4K_PAGES
default ARM64_VA_BITS_47 if ARM64_16K_PAGES
default ARM64_VA_BITS_42 if ARM64_64K_PAGES
default ARM64_VA_BITS_52
help
Allows choosing one of multiple possible virtual address
space sizes. The level of translation table is determined by

1
arch/arm64/configs/defconfig
View File

@ -76,7 +76,6 @@ CONFIG_ARCH_VEXPRESS=y
CONFIG_ARCH_VISCONTI=y
CONFIG_ARCH_XGENE=y
CONFIG_ARCH_ZYNQMP=y
CONFIG_ARM64_VA_BITS_48=y
CONFIG_SCHED_MC=y
CONFIG_SCHED_SMT=y
CONFIG_NUMA=y