It's MTE4. The "enhancements" mostly make it easier for Apple developers to hack XNU into continuing to operate with MTE.
replyIt's more like MTE was originally intended as a debugging tool (like ASan), and MTE4 makes it work as a security hardening measure.
replyDo you know if macos has the changes needed to make use of MIE with M5? I assume that it has with iPadOS.
replydo you have a citation for M5 having MTE?
replyI did primary research. I just bought an M5 Mac and confirmed by doing:
reply $ sysctl -a | grep MTE4
hw.optional.arm.FEAT_MTE4: 1Thank you for posting that. I was pretty sure the M5 was going to ship with MTE, but the last time I checked the documents, they still hadn't updated them (nor any mention of M5 having Apple10 in the metal feature tables). Some big features there that makes me want to upgrade!
replyIt does.
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