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Product Errata 35

Revision Guide for AMD Athlon™ 64 and AMD Opteron™ Processors

25759 Rev. 3.79 July 2009

71 RSM from SMM with Paging Enabled May Deadlock

Description

Under a rare set of internal timing circumstances, a speculative TLB reload may incorrectly interact

with the RSM instruction such that the processor becomes deadlocked. This can only occur if the

SMM handler configures and enables its own paging environment.

Potential Effect on System

The system hangs and recovers only after a system reset is performed.

Suggested Workaround

If paging is enabled in the SMM handler, disable it (by clearing CR0.PG) before executing the RSM

instruction.

Fix Planned

Yes

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AMD Athlon 6 Spezifikationen Seite 35