Viewing profile — NablaSquaredG

By finding a bug in the PSP. Heck, bugs like Meltdown and Spectre were found. And exploits on the PSP have already been demonstrated, see here https://github.com/PSPReverse/amd-sp-…

> BIOS flashing from the OS has been a thing for a long, long time now. Heck my XPS 13 running Linux even gets BIOS updates from apt-get. Yes, I forgot to add that point. It's also…

As far as I know, Intel does exactly that (or at least allows vendors to do that, I think HP does that) IIRC, in Intel's case, the chipset has the vendor keys burned into it. This …

There are a couple of issues I see with this. First, the security argument is nonsense in my opinion. This "feature" only prevents an attacker from flashing a modified, malicious B…

locking: At least some AMD CPUs (EPYC, TR PRO, Ryzen Pro) can have cryptographic keys burned into the silicon by the BIOS (Dell and Lenovo do that) Once a CPU has those keys burned…

This is not correct. The locks does happen on the CPU level. If the board cannot provide a BIOS with a valid signature from the key that was burned into the CPU, the CPU will refus…

Well, if it's optimised out at "-O3", I usually don't care. If you have some numerical code you can optimise further (even though you're using "-O3" or "-ffast-math"), things becom…