[higherhalf]

Yes. Kind of.

AMD processors have Upper Address Ignore (UAI) with 7 bits of ancillary data, for Intel there is Linear Address Masking (LAM) with 6 or 15 bits [1]. The latter has made it into Linux after some initial resistance [2].

[1]: https://lwn.net/Articles/888914

[2]: https://www.phoronix.com/news/Intel-LAM-Merged-Linux-6.4

[Liquid_Fire]

Those sound analogous to the TBI feature in Arm, rather than MTE itself (which uses TBI).