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d09ee410a3
Currently our ABI documentation says that the state of the bits in the Z registers not shared with the V registers becomes undefined on syscall but our actual implementation unconditionally clears these bits. Taking advantage of the flexibility of our documented ABI would be a change in the observable ABI so there is concern around doing so, instead document the actual behaviour so that it is more discoverable for userspace programmers who might be able to take advantage of it and to record our decision about not changing the kernel ABI. This makes qemu's user mode implementation buggy since it does not clear these bits. Signed-off-by: Mark Brown <broonie@kernel.org> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Link: https://lore.kernel.org/r/20220829162502.886816-3-broonie@kernel.org Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> |
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| .. | ||
| acpi_object_usage.rst | ||
| amu.rst | ||
| arm-acpi.rst | ||
| asymmetric-32bit.rst | ||
| booting.rst | ||
| cpu-feature-registers.rst | ||
| elf_hwcaps.rst | ||
| features.rst | ||
| hugetlbpage.rst | ||
| index.rst | ||
| kasan-offsets.sh | ||
| legacy_instructions.rst | ||
| memory-tagging-extension.rst | ||
| memory.rst | ||
| perf.rst | ||
| pointer-authentication.rst | ||
| silicon-errata.rst | ||
| sme.rst | ||
| sve.rst | ||
| tagged-address-abi.rst | ||
| tagged-pointers.rst | ||