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A comment on MIT researchers uncover ‘unpatchable’ flaw in Apple M1 chips. Parent comment

Re:MIT researchers uncover ‘unpatchable’ flaw in Apple M1 chips by jprx on Friday June 10, 2022 @11:01AM (#31695146)
You hit the nail right on the head! That's exactly what we did :)
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Re:MIT researchers uncover ‘unpatchable’ flaw in Apple M1 chips by twoodfin on Friday June 10, 2022 @02:24PM (#31697671)
Apparently they haven’t fixed it yet, so a hardware solution may in fact not be possible, but is there any reason to believe it couldn’t be patched in “microcode”?

Who can guess at the performance impact, but one could imagine a configurable mechanism capable of disabling speculation past a PAC authentication.

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Re:MIT researchers uncover ‘unpatchable’ flaw in Apple M1 chips by ungamed on Saturday June 11, 2022 @07:38AM (#31703747)
Does the m1 even have microcode ?
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Re:MIT researchers uncover ‘unpatchable’ flaw in Apple M1 chips by twoodfin on Saturday June 11, 2022 @10:03AM (#31704491)
I’d be shocked if a modern CPU didn’t have some kind of “firmware” to respond to errata.
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