MP All Models Mitigations for Load Value Injection CPU Vulnerability reduces performance up to 77%

[MisterAndrew]

According to this article mitigations for the recently discovered Load Value Injection vulnerability in Intel CPUs can significantly reduce performance. All Mac Pro 7,1 and 6,1 processors are affected. Mac Pro 5,1 and older processors are most likely affected, but Intel doesn't specifically list them. Probably because Intel no longer releases microcode updates for them.

Intel LVI Vulnerability Mitigations Reduce Some Xeon's Performance up to 77 Percent

Load Value Injection could be punishing

www.tomshardware.com

List of affected processors:

Affected Processors: Transient Execution Attacks & Related Security...

Review the impact of transient execution attacks and select security issues on currently supported Intel products.

software.intel.com

 

[tsialex]

According to this article mitigations for the recently discovered Load Value Injection vulnerability in Intel CPUs can significantly reduce performance. All Mac Pro 7,1 and 6,1 processors are affected. Mac Pro 5,1 and older processors are most likely affected, but Intel doesn't specifically list them. Probably because Intel no longer releases microcode updates for them.

Intel LVI Vulnerability Mitigations Reduce Some Xeon's Performance up to 77 Percent

Load Value Injection could be punishing

www.tomshardware.com

List of affected processors:

Affected Processors: Transient Execution Attacks & Related Security...

Review the impact of transient execution attacks and select security issues on currently supported Intel products.

software.intel.com

MP5,1 are affected too, equivalent and still supported SandyBridge iX processors with CPUID 206A7 are listed - Westmere Xeons are 206C0.

The question is how macOS is affected by the SGX vulnerability.