04:46 <sven> very nice :-)

10:05 <roxfan> gdb stub is from qemu?

10:05 <roxfan> does it boot to desktop?

13:53 <marcan> c1truz[m]: nice! I assume that one doesn't need GXF/SPRR? I can't imagine Linux playing nicely with that :)

14:01 <c1truz[m]> roxfan: gdbstub yes. no, just booting from ramdisk in serial mode atm. There is some paravirt gpu driver in that kernel, but I need to figure out how it works.

14:02 <roxfan> cool

14:02 <c1truz[m]> marcan: exactly. no proprietary registers and even support for GICv3 :)

14:10 <bloom> eh?

14:17 <_jannau_> so it might run directly on non-apple arm64 HW?

15:17 <marcan> that's surprising, I imagined they would at least still want AMX/Apple PAC and things like that

15:17 <marcan> the ones that don't need massive HV changes but do require Apple hardware (and the right bits flipped by the HV)

17:37 <c1truz[m]> it does a hvc to get the default rop and jop pids, for which I currently just return 0

17:37 <c1truz[m]> marcan: what is different with apple's PAC implementation?

17:38 <marcan> they support extra kernel keys, per-boot diversification, and they also did the whole EL1/EL2/EL12 VHE thing with the entire register set (standard ones and their add-ons)

17:38 <marcan> probably more things

17:39 <bloom> marcan: nini

17:40 <marcan> c1truz[m]: https://opensource.apple.com/source/xnu/xnu-7195.50.7.100.1/doc/pac.md

17:40 <marcan> "Key generation on Apple CPUs"

17:40 <marcan> apple documented this, then deleted the file in 11.2+, because of course they didn't *mean* to document it...

17:40 <c1truz[m]> hehe thx

17:40 <bloom> incredible

17:42 <marcan> see also https://github.com/AsahiLinux/m1n1/blob/main/tools/apple_regs.json everything that mentions "pointer authentication"

17:42 <marcan> bloom: nn :p

19:15 <sven> marcan: did you see any special flags or bits in the PTE when the DART mapped device memory?

19:59 <jannau> sven: complete trace_dart.py output of booting to the login screen and shutting the system down: https://gist.github.com/jannau/a9fcee3038517e985fc6c456c9da738c

19:59 <jannau> still no booting mac os kernel under HV?

20:33 <sven> i'm pretty sure it's because my mac os version is old

20:33 <sven> i never updated it since january or so

20:33 <sven> and i've been too lazy to fix that

20:33 <sven> :(

21:20 <bloom> sven: ...yep, that'd do it probably :p

21:20 <bloom> start the update and go for a walk? :)

21:39 <sven> you underestimate my procrastination!

21:46 <jannau> mac os seems to make extra sure that that the i2c pins are configured correctly on each i2c transfer. it reads the config first, writes the same same config back and reads it again

23:22 <roxfan> toctou is no joke