see linux commit 3b714d24ef173f81c78af16f73dcc9b40428c803 arm64: mte: CPU feature detection and initial sysreg configuration
@@ -49,3 +49,4 @@
#define HWCAP2_DGH (1 << 15)
#define HWCAP2_RNG (1 << 16)
#define HWCAP2_BTI (1 << 17)
+#define HWCAP2_MTE (1 << 18)