AMD "Smart Trace Buffer" Feature Being Wired Up For Linux

[phoronix]

Phoronix: AMD "Smart Trace Buffer" Feature Being Wired Up For Linux

AMD patches this month have begun preparing support for a new CPU feature called Smart Trace Buffer (STB)...

https://www.phoronix.com/scan.php?page=news_item&px=AMD-Smart-Trace-Buffer-Linux

[FireBurn]

The big issue with this this new feature is it isn't persistent, if your machine locks up there's no way to see what that trace is

For the suspend issues, there's a chance it might have been captured before it suspended - I've submitted the trace, it's all gibberish however so I'm guessing AMD know how to decode it into something more useful

https://gitlab.freedesktop.org/drm/amd/-/issues/1720

[kylew77]

Not to be the conspiracy theorist, but doesn't this reak of back doors? Having the microcontroller, the psp, know about the return value of every function call at worst and state of the registers at best seems iffy.

[jaxa]

Not to be the conspiracy theorist, but doesn't this reak of back doors? Having the microcontroller, the psp, know about the return value of every function call at worst and state of the registers at best seems iffy.

A true conspiracy theorist already believed every x86 and ARM chip reeks of backdoors.

[Vistaus]

Not to be the conspiracy theorist, but doesn't this reak of back doors? Having the microcontroller, the psp, know about the return value of every function call at worst and state of the registers at best seems iffy.

No, no. AMD is holy within the tech community, Intel is the only one doing bad things.

[CochainComplex]

That's why the true path is PowerPC but afaik next gen is also slightly closed source. So next holy grail risc-v ?

kylew77 not conspiracy. But if this thing is flawed an exploit could be quite powerful.

[onlyLinuxLuvUBack]

Not to be the conspiracy theorist, but doesn't this reak of back doors? Having the microcontroller, the psp, know about the return value of every function call at worst and state of the registers at best seems iffy.

I hope you are a fellow templeOS user ?

[skeevy420]

No, no. AMD is holy within the tech community, Intel is the only one doing bad things.

Loongson has entered the chatroom.

[piorunz]

New hardware caches and buffers, new exciting security vulnerabilities to explore.

[Vistaus]

Loongson has entered the chatroom.

RISC-V also joins.