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| author |   Steve Capper <steve.capper@arm.com> | 2019-08-07 16:55:17 +0100 |
|---|---|---|
| committer |   Will Deacon <will@kernel.org> | 2019-08-09 11:17:16 +0100 |
| commit | 90ec95cda91a021d82351c976896a63aa364ebf1 (patch) | |
| tree | 6f5295463a65f0cda5e79bd47998ab10df11c0f6 /arch/arm64/include/asm/kasan.h | |
| parent | arm64: dump: De-constify VA_START and KASAN_SHADOW_START (diff) | |
| download | linux-dev-90ec95cda91a021d82351c976896a63aa364ebf1.tar.xz linux-dev-90ec95cda91a021d82351c976896a63aa364ebf1.zip | |
arm64: mm: Introduce VA_BITS_MIN
In order to support 52-bit kernel addresses detectable at boot time, the
kernel needs to know the most conservative VA_BITS possible should it
need to fall back to this quantity due to lack of hardware support.
A new compile time constant VA_BITS_MIN is introduced in this patch and
it is employed in the KASAN end address, KASLR, and EFI stub.
For Arm, if 52-bit VA support is unavailable the fallback is to 48-bits.
In other words: VA_BITS_MIN = min (48, VA_BITS)
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Steve Capper <steve.capper@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/arm64/include/asm/kasan.h')
0 files changed, 0 insertions, 0 deletions