Does CPU set the Referenced bit Memory Management

Hi, I want to understand the mechanism by which linux marks a page as referenced. According to the documentation in "Understanding The Linux Virtual Memory Manager" Figure 11.6 and Table 3.1, there is a bit PG_referenced that can be queried to test if the page was accessed. I want to ask if the CPU can/does set that bit. Also, is this bit set on a LLC miss or on a TLB access? Thanks a lot. Please tell me if there are some manuals/other forums I could refer to for this question. -- Rakhi Hemani Phd Scholar Roll Number PhD1207