diff options
| author | Vincenzo Frascino <[email protected]> | 2019-08-23 17:37:17 +0100 |
|---|---|---|
| committer | Will Deacon <[email protected]> | 2019-08-27 18:16:20 +0100 |
| commit | 92af2b696119e491a95d77acdd8832b582d300d4 (patch) | |
| tree | fccf2394ba5784c978d80758bef60bab04f8ca5f /scripts/patch-kernel | |
| parent | 1243cb6a676ffcfa72dd25859edddf66cde0b638 (diff) | |
arm64: Relax Documentation/arm64/tagged-pointers.rst
On AArch64 the TCR_EL1.TBI0 bit is set by default, allowing userspace
(EL0) to perform memory accesses through 64-bit pointers with a non-zero
top byte. However, such pointers were not allowed at the user-kernel
syscall ABI boundary.
With the Tagged Address ABI patchset, it is now possible to pass tagged
pointers to the syscalls. Relax the requirements described in
tagged-pointers.rst to be compliant with the behaviours guaranteed by
the AArch64 Tagged Address ABI.
Cc: Will Deacon <[email protected]>
Cc: Szabolcs Nagy <[email protected]>
Cc: Kevin Brodsky <[email protected]>
Acked-by: Andrey Konovalov <[email protected]>
Signed-off-by: Vincenzo Frascino <[email protected]>
Co-developed-by: Catalin Marinas <[email protected]>
Signed-off-by: Catalin Marinas <[email protected]>
Signed-off-by: Will Deacon <[email protected]>
Diffstat (limited to 'scripts/patch-kernel')
0 files changed, 0 insertions, 0 deletions