andreiw

6 ms·

1.
by andreiw 8y ago
Dumb question, but how would it fare on a ppc64le box like the (OpenPower) Power9 Talos II? https://www.raptorcs.com/TALOSII/prerelease.php
2.
by andreiw 8y ago
On a related note, another interesting CPU design - http://multiclet.com/index.php/en/support/general-technical-...
3.
by andreiw 8y ago
Also 64-bit Arm...
4.
by andreiw 8y ago
Yeah I’d say that modern OoO Arm implementations (A57, A72, ...) are worth trying to speculate into trapped VFP state. Lazy FPU is definitly a thing everywhere. My hunch says that chips affected by 4a could easily be fair game (4a is specul
5.
by andreiw 8y ago
Not numerating it? Variant 6 is as good as anything...
6.
by andreiw 8y ago
Do we have PoC code? Has anyone tried attacking FP/SIMD state on other ISAs like Power or AArch64?
7.
by andreiw 8y ago
What are we calling this Spectre variant?
8.
by andreiw 8y ago
As usual, Carl Icahn...
9.
by andreiw 8y ago
Then tell your SiP to do better. On Arm the conditional speculation barrier couldn’t be more lightweight (CSDB).
10.
by andreiw 8y ago
“break”? no, but spectre is a confidentiality attack, and not even the only confidentiality attack that can be done... yes you could, but the noise floor won’t be great
11.
by andreiw 8y ago
Depends on how you define hardware and software. There are global workarounds that amount to crippling CPU behavior, to provide guarantees for code not written to be spectre safe. I guess that’s what you mean by “hardware”. But “software” a
12.
by andreiw 8y ago
Considering the hardware mitigations aren’t some magic bullet, but are a “big hammer” that cripples CPU OoO behavior in crrtain ways for everything , software mitigations don’t seem that unreasonable. Of course, “software mitigations” use
13.
by andreiw 8y ago
Anyone else use the hex “assembler” on the TI-83+? After a while you just memorize the hex opcodes for z80 insns... TI-GCC for my TI-89 was nice...a few years back I tried to dust-off my IMSA-issued 89, and...it didn’t turn on. Sad. Replace
14.
by andreiw 8y ago
Not yet... the good news is that iPXE supports the SMSC USB NIC on the Pi. I don't know if iPXE will work out of the box, but I certainly intend on porting the iPXE NIC driver as a standalone (and GPL-licensed, of course) SNP implement
15.
by andreiw 8y ago
Maybe. I'll look.
16.
by andreiw 8y ago
There's a few problems there, but these amount to UEFI being a terrible, abominable spec. The specification doesn't say that an implementation must not change the memory map inside ExitBootServices, and in practice many runtime dr
17.
by andreiw 8y ago
Author here, feel free to AMA.
18.
by andreiw 8y ago
If you run the “mmap” command in UEFI shell, and count the memory regions marked as Runtime Code and Runtime Data, that will give you the total resident (after booting OS) memory footprint. Note that these numbers will also include Arm Trus
19.
by andreiw 8y ago
Yep, and being able to claim that U-boot can boot Windows (on x64 or Arm) would be a really strong statement around completeness. I hope someone gets to work on it soon (Alexander Graf ;-)?).
20.
by andreiw 8y ago
RaspberriPiPkg can’t boot Raspbian today, since the latter is 32-bit. Can boot stock 64-bit SUSE and Ubuntu, though.
21.
by andreiw 8y ago
A lot of it really is code quality issues, both in the core and some of the contributed I/O drivers.
22.
by andreiw 8y ago
Author here. If you wanted to run you own drivers, or had code written specifically against protocols exported by Tiano components I believe the answer is - yes. RaspberryPiPkg is the $35 64-bit Arm UEFI devkit. Of couse the U-boot implemen
23.
by andreiw 8y ago
Actually, good question to flip back to you. As a random person stumbling upon this, what value would you assign to it? What could you imagine the end goal to be?
24.
by andreiw 8y ago
Arm derived: 32-bit Cortex-A and a Cortex-M for radio. Curious what the security arch is...
25.
by andreiw 8y ago
I think the bigger news here is the custom MCU design. What is it? Is it Arm-derived, and if not - why? Anyone pay attention lately to MSFT’s activity on LKML?
26.
by andreiw 8y ago
No concrete goal beyond having a reasonably useful UEFI development environment (more so than the 96boards one). It’s been useful to be able to run the same Ubuntu and SUSE images as VMs and servers do, but that’s only really possible becau
27.
by andreiw 8y ago
I dunno dude. I just pointed out the obvious, and all I get is a passive-aggressive minusing. Most people won’t care enough to even give you “a rant”, they’ll just move on. If you don’t want feedback, don’t ask for feedback by posting publi
28.
by andreiw 8y ago
Not to invalidate all of your arguments, but it does “just install” in a VM without needing technical experience. To reach any mass of users (outside of turnkey solutions where the end users may not know or care), you need commercial suppor
29.
by andreiw 8y ago
Firefox 48 worked, but the autoupdate crashed. If you install 7Zip, you should know that 7Zip does not associate itself with file extensions by default. This is 7zip behavior. You need to run 7zip, go to options, and set associations by cli
30.
by andreiw 8y ago
AMD PCnet-PCI II as the NIC works fine for me (VBox 5.2.4 r119785 (Qt5.6.3) on the Mac, if that helps)

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