marcan_42

8 ms·

31.
by marcan_42 5y ago
strcat is right here. Purism designs and markets their devices, effectively, to cater to a crowd that believes that devices with actual security are inherently evil, because they do not understand it. You can have better security with use
32.
by marcan_42 5y ago
It's not the secure enclave thing. These aren't SSDs. These are raw storage modules. The SSD controller is built into the M1/T2. You are upgrading the raw storage behind a single, global SSD. Of course when you change the lay
33.
by marcan_42 5y ago
My name was on the Sony lawsuit next to his, for what it's worth. I don't know him personally, but I did have to ask him to give us credit for just implementing our method when he posted the PS3 metldr keys without explanation, a
34.
by marcan_42 5y ago
Let's just say I've talked with people who have worked with him on comma.ai and... I heard his cars would be driving into everything if it were just his code running them without all the safety features the folks around him added.
35.
by marcan_42 5y ago
Reminder that geohot wasn't the first person to jailbreak an iPhone; that's an oft repeated myth. He was the first person to publicly carrier unlock an iPhone, which he did using information and methods he mostly learned from ot
36.
by marcan_42 5y ago
That's implied in how page tables work. If your pages are 16K then all your page levels are going to shift up two bits compared to 4K. Again, these aren't 16K "huge pages", that'd be nice. This is changing the basel
37.
by marcan_42 5y ago
That's the issue: 16K pages never exist alongside 4K pages in the same address space half. The CPU has two mode flags, for kernel and userspace respectively. There is no way to mix modes within the same address space half. And changing
38.
by marcan_42 5y ago
No, you can't really save/restore the hardware context to pull this off. You'd need actual virtual devices for ~everything at some level. I won't go as far as saying it's impossible a priori, but it'd be a huge
39.
by marcan_42 5y ago
It is completely different from hugepages. Hugepages exist alongside normal pages.
40.
by marcan_42 5y ago
Specifically, things on that list are things that work already, but are disabled or not merged into our release kernels yet because they aren't quite ready for end users. So they "work" already, just not in the kernel package
41.
by marcan_42 5y ago
Virtualization is working on Linux, but the macOS story is not that. We run macOS inside a custom VM hypervisor I wrote, on bar metal, passing through almost all the hardware. macOS is unlikely to run inside a VM on Linux any time soon, bec
42.
by marcan_42 5y ago
It's probably based on AWDL, same as AirDrop. So yes, that's a proprietary peer-to-peer protocol that ignores your home network.
43.
by marcan_42 5y ago
The raw image support has nothing to do with silicon bring-up. That is an option for a userspace tool running in macOS recovery mode. At that point you're well past silicon bring-up. I don't know why people keep conflating those t
44.
by marcan_42 5y ago
You realize you're linking me my own tweet, right? [1] isn't cutting corners, it's just not optimizing a use case that didn't matter for iOS devices, and not realizing it to fix it when bringing that controller to Macs.
45.
by marcan_42 5y ago
alx.sh serves you this script: https://github.com/AsahiLinux/asahi-installer/blob/main/scri... It's proxied to avoid requiring users to use curl -L, otherwise I'd just have made it redirect.
46.
by marcan_42 5y ago
That's not the same thing. Huge pages are in addition to standard pages. Being in 16K mode means no 4K pages. It's a global switch. Linux can't handle that, the baseline page size is set at compile time and affects a ton of
47.
by marcan_42 5y ago
Most of that is leaving enough space for macOS updates not to break. The minimal image requires 8GB of actual space by default, 3GB for boot stuff related to macOS and a default minimum 5GB root partition. I can actually go lower there, but
48.
by marcan_42 5y ago
> It completely rules out any hardware-accelerated applications, which is a lot of desktop use cases What does that even mean? We have a full composited desktop with shadows and transparency and everything. Software rendering doesn'
49.
by marcan_42 5y ago
I would expect the people already daily-driving ARM Linux laptops with GPUs that run slower than software rendering on M1s to be perfectly happy with the current state of affairs. This is not to say GPU support is a long way away; it isn&
50.
by marcan_42 5y ago
It's not only the "console effect" for the OS though. It's the vertical integration of the hardware to begin with. It's just better than x86 platforms because Apple control everything and can make sure it works
51.
by marcan_42 5y ago
Mac Studio isn't supported yet, but I expect bring-up to take a day or two once mine arrives! Some upstream kernel folks are already using Apple Silicon machines for development (to compile x86 kernels even) because they're faster
52.
by marcan_42 5y ago
Linux is the world's most popular OS running on mobile devices with small batteries. I'd say x86 platforms have not always been the best at that :-)
53.
by marcan_42 5y ago
Chadmed is working on the processing, and he already thinks he can get better results than macOS. The other day he measured the response with a calibration mic so we can compute good correction coefficients.
54.
by marcan_42 5y ago
Even without GPU, we're getting better battery life than many x86 laptops already.
55.
by marcan_42 5y ago
Speakers work in our kernel tree, we're just not shipping it yet because there's infrastructure work to be done because Linux as a whole has no subsystem for enforcing speaker volume safety limits, nor does it have any subsystem
56.
by marcan_42 5y ago
And yet we're getting ~8h of battery life on these machines with software rendering. Did I mention the hardware is just that good? :-)
57.
by marcan_42 5y ago
Headphone jack works on M1 models (though I discovered today it's a bit flaky on boot). The speakers technically work on all the laptops, but we need to implement safeties to make sure you don't accidentally blow your speakers, an
58.
by marcan_42 5y ago
The installer is done, you just curl|sh from macOS and follow the prompts :-)
59.
by marcan_42 5y ago
> quad-die Mac Pros I said quad- Jade Mac anythings aren't coming because that die is only designed to go in pairs (that's the M1 Max die). Everyone keeps rambling on about that idea because that Bloomberg reporter said it w
60.
by marcan_42 5y ago
Recurring meetings cannot be expressed as timestamps (unless you want all the humans to hate you). The recurrence has to be expressed in terms of local time (and date/day of week) in some (ideally per-event) timezone.

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