Mention MTE in the HWASan design doc.

Author: pcc

clang/docs/HardwareAssistedAddressSanitizerDesign.rst

@@ -291,7 +291,7 @@ implement page aliasing.
 
 Related Work
 ============
-* `SPARC ADI`_ implements a similar tool mostly in hardware.
+* `SPARC ADI`_ and `Arm MTE`_ implement a similar tool mostly in hardware.
 * `Effective and Efficient Memory Protection Using Dynamic Tainting`_ discusses
   similar approaches ("lock & key").
 * `Watchdog`_ discussed a heavier, but still somewhat similar
@@ -302,6 +302,7 @@ Related Work
 .. _Watchdog: https://www.cis.upenn.edu/acg/papers/isca12_watchdog.pdf
 .. _Effective and Efficient Memory Protection Using Dynamic Tainting: https://www.cc.gatech.edu/~orso/papers/clause.doudalis.orso.prvulovic.pdf
 .. _SPARC ADI: https://lazytyped.blogspot.com/2017/09/getting-started-with-adi.html
+.. _Arm MTE: https://developer.arm.com/documentation/108035/0100/Introduction-to-the-Memory-Tagging-Extension
 .. _AddressSanitizer paper: https://www.usenix.org/system/files/conference/atc12/atc12-final39.pdf
 .. _Address Tagging: http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.den0024a/ch12s05s01.html
 .. _Linear Address Masking: https://software.intel.com/content/www/us/en/develop/download/intel-architecture-instruction-set-extensions-programming-reference.html