Specifications

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