92af2b6961
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 <will.deacon@arm.com> Cc: Szabolcs Nagy <szabolcs.nagy@arm.com> Cc: Kevin Brodsky <kevin.brodsky@arm.com> Acked-by: Andrey Konovalov <andreyknvl@google.com> Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com> Co-developed-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Will Deacon <will@kernel.org> |
||
|---|---|---|
| .. | ||
| acpi_object_usage.rst | ||
| arm-acpi.rst | ||
| booting.rst | ||
| cpu-feature-registers.rst | ||
| elf_hwcaps.rst | ||
| hugetlbpage.rst | ||
| index.rst | ||
| legacy_instructions.rst | ||
| memory.rst | ||
| perf.txt | ||
| pointer-authentication.rst | ||
| silicon-errata.rst | ||
| sve.rst | ||
| tagged-address-abi.rst | ||
| tagged-pointers.rst | ||