Intel Prepares "Enhanced IBRS" As Better Spectre V2 Protection For Future CPUs

[phoronix]

Phoronix: Intel Prepares "Enhanced IBRS" As Better Spectre V2 Protection For Future CPUs

An Intel engineer has today published a patch providing support for enhanced IBRS within the Linux kernel, which aims to provide better Spectre Variant Two protection by default with future generations of Intel CPUs...

http://www.phoronix.com/scan.php?page=news_item&px=Intel-Linux-Enhanced-IBRS

[My8th]

"for capble CPUs"

[tildearrow]

mitgiation

[Michael]

mitgiation

Typing from a laptop for a few days, my eyes not working out well with the screen.

[tildearrow]

Typing from a laptop for a few days, my eyes not working out well with the screen.

Try taking a rest, or increasing the font size/UI scale.

[Aeder]

I wonder if this "Enhanced IBRS" is basically just doing what AMD processors have been doing, and if it's going to lower performance.

[RealNC]

Since these are future CPUs, shouldn't they be fixing the problem instead of mitigating it?

[zxy_thf]

Since these are future CPUs, shouldn't they be fixing the problem instead of mitigating it?

I doubt there will be a complete fix for such kind of problems -- it's very likely that new side channels would be discovered after fixing the known ones.

[dwagner]

And still, new side-channel attacks are popping up faster than old ones are being "mitigated" (not fixed, mind you):

SpectreRBS

https://arxiv.org/pdf/1807.07940.pdf

ret2spec

https://christian-rossow.de/publications/ret2spec-ccs2018.pdf

[andyprough]

There's medications for irritable bowel syndrome. No need to slow down the processors.