Specification Update

Errata
62 Specification Update
W68. Hardware Prefetch Performance Monitoring Events May
Be Counted Inaccurately
Problem: Hardware prefetch activity is not accurately reflected in the hardware
prefetch performance monitoring.
Implication: This erratum may cause inaccurate counting for all hardware prefetch
performance monitoring events.
Workaround: None identified.
Status: For the steppings affected, see the Summary Tables of Changes.
W69. Programming the Digital Thermal Sensor (DTS) Threshold
May Cause Unexpected Thermal Interrupts
Problem: Software can enable DTS thermal interrupts by programming the
thermal threshold and setting the respective thermal interrupt enable
bit. When programming DTS value, the previous DTS threshold may be
crossed. This will generate an unexpected thermal interrupt.
Implication: Software may observe an unexpected thermal interrupt occur after
reprogramming the thermal threshold.
Workaround: In the ACPI/OS implement a workaround by temporarily disabling the DTS threshold
interrupt before updating the DTS threshold value.
Status: For the steppings affected, see the Summary Tables of Changes.
W70. Removed – See Erratum W51
W71. Removed – See Erratum W50
W72. Removed – See Erratum W53