Think this may be the right forum where people may have some insight in this.
Reading "Intel® 64 and IA-32 Architectures Software Developer’s Manual Combined Volumes: 1, 2A, 2B, 2C, 3A, 3B and 3C" from June 2013 I got confused in section 19-2 "PERFORMANCE MONITORING EVENTS FOR THE 4TH GENERATION INTEL® CORE™ PROCESSORS". On p 2530 event num D0H (MEM_UOPS_RETIRED) is described. However, umask values 02H and 20H are not described even though they are referenced as values possible to combine with the umask values included in the docs. A not too far-fetched guess is that 02H may be STORES, 20H is harder to guess.
Anyone on the forum who knows what should have been written in the docs?