09:56 <j_ey> marcan: is there the full slides somewhere for stan's talk?

10:03 <blazra[m]> <j_ey> "marcan: is there the full slides..." <- https://i.blackhat.com/USA21/Wednesday-Handouts/us-21-Reverse-Engineering-The-M1.pdf

10:04 <j_ey> blazra[m]: thanks!

11:21 <marcan> not much there we don't already know about

14:29 <robinp> "Resolved in macOS Monterey 12 beta 4: You can now start up from macOS Recovery. (78334511)" <-- does that mean *any* recovery now or still only 1TR?

14:53 <alyssa> dougall: you got a call out ;D

14:54 <alyssa> "thanks, Apple" lol

14:54 <j_ey> robinp: not 100% sure, but markan said on stream that each boot partition is now paired with a recovery partition

15:33 <marcan> robinp: so 1TR isn't "that last partition", it means "physical presence asserted"

15:33 <marcan> AFAICT, 1TR now is the paired recovery of whatever the default boot OS is

16:43 <sven> 1 file changed, 76 insertions(+), 10 deletions(-) <-- maybe, just maybe, i should've directly taught dma-iommu how to deal with 16k pages on a 4k kernel instead of trying to hack this....

16:45 <j_ey> >_<

16:45 <j_ey> sven: git push, I wanna see!

16:45 <sven> dinner first, then cleaning it up a little bit and then git push :-)

17:35 <sven> j_ey: https://github.com/AsahiLinux/linux/tree/dart/dev

17:35 <sven> not very well tested and possibly broken

17:35 <sven> but i could boot from my usb device connected to pcie and use the pcie ethernet adapter just fine

17:35 <sven> and i kinda expect anything that breaks to be subtle

17:36 <j_ey> __ffs, I have no idea what this does, but it's amusing

17:36 <sven> Find First Set bit :-)

17:37 <j_ey> not as funny now :P

17:38 <sven> i'll be a little bit sad if this works. it's less code than either of the identity bypass hacks i tried :<

17:39 <j_ey> that's a good thing!

17:40 <sven> yes! the bad thing is that i tried hacks first which were _more_ work than doing it correctly :D

17:46 <j_ey> sven: the scatter gather bit is an optimisation right?

17:46 <sven> which bit?

17:47 <sven> my additions? they're skipping an optimization that would break

17:47 <j_ey> sorry yeah, that's what I understood.

17:48 <sven> https://lore.kernel.org/linux-iommu/0d20bd6b-d0a1-019c-6398-b12f83f4fdf7@arm.com/

17:48 <sven> it's technically an optimization but apparently there's broken code somewhere that relies on it

17:48 <sven> but well...

23:31 <dgc[m]> Earlier today I commented to a coworker that what I'd love more than any other development in computering is a hypervisor or microkernel that allowed you to run both MacOS and (say) Linux concurrently on Apple hardware. Then 5 minutes ago I saw this statement about making m1n1 a thin HV to intercept and inspect MacOS hardware interactions. This sounds really interesting and I just want to pop in and say so.