Re: [PATCHv3 0/8] Linear Address Masking enabling

Edgecombe, Rick P
2022-06-16T22:52:49Z

On Fri, 2022-06-10 at 17:35 +0300, Kirill A. Shutemov wrote:
> Linear Address Masking[1] (LAM) modifies the checking that is applied
> to
> 64-bit linear addresses, allowing software to use of the untranslated
> address bits for metadata.
>
> The patchset brings support for LAM for userspace addresses.

Arm has this documentation about which memory operations support being
passed tagged pointers, and which do not:
Documentation/arm64/tagged-address-abi.rst

Is the idea that LAM would have something similar, or exactly mirror
the arm ABI? It seems like it is the same right now. Should the docs be
generalized?