AMD has also already released a fix for the big boy - the EPYC processor.
The MSR bit is potentially a large performance loss and AMD recommends their partners not use it. In my tests is was 5-15% on EPYC depending on workload. "Some performance cost" is really hiding the reality of that bit.
Yikes.
It's worth noting these are the firmware / microcode fixes.
There's already a software solution available,
AMD has also already released a fix for the big boy - the EPYC processor.
The MSR bit is potentially a large performance loss and AMD recommends their partners not use it. In my tests is was 5-15% on EPYC depending on workload. "Some performance cost" is really hiding the reality of that bit.