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| author |   Steve Capper <steve.capper@arm.com> | 2018-12-06 22:50:42 +0000 |
|---|---|---|
| committer |   Will Deacon <will.deacon@arm.com> | 2018-12-10 18:42:18 +0000 |
| commit | b9567720a1b8e739380e0241413606c056c57859 (patch) | |
| tree | 760f658f0fbb3ec46f0cbdaa0314245f6f094fb7 /arch/um | |
| parent | arm64: mm: introduce 52-bit userspace support (diff) | |
| download | linux-dev-b9567720a1b8e739380e0241413606c056c57859.tar.xz linux-dev-b9567720a1b8e739380e0241413606c056c57859.zip | |
arm64: mm: Allow forcing all userspace addresses to 52-bit
On arm64 52-bit VAs are provided to userspace when a hint is supplied to
mmap. This helps maintain compatibility with software that expects at
most 48-bit VAs to be returned.
In order to help identify software that has 48-bit VA assumptions, this
patch allows one to compile a kernel where 52-bit VAs are returned by
default on HW that supports it.
This feature is intended to be for development systems only.
Signed-off-by: Steve Capper <steve.capper@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/um')
0 files changed, 0 insertions, 0 deletions