x86/CPU/AMD: Fix AMD TLBI Erratum #1718

Summary

In the Linux kernel, the following vulnerability has been resolved: x86/CPU/AMD: Fix AMD TLBI Erratum #1718 The processor may fail to invalidate a TLB entry while executing an INVLPGB/TLBSYNC instruction pair. Detect the erratum and apply a software workaround when a microcode fix is not present.

Remediation

1. Inventory every Linux Linux deployment, including staging.
2. No fixed version appears in the public sources yet. Check the references below and the vendor directly.

References

• Referencehttps://git.kernel.org/stable/c/098d80b04d0fe02889c332d061db968f070b83a6
• Referencehttps://git.kernel.org/stable/c/87db7795cbaaf636ae22ae031f4906db7bb77803
• Referencehttps://git.kernel.org/stable/c/e3e6779f77ab6f0a1aa80e24868d2d89f31053fe