PTI_USER_PCID_MASK  187 arch/x86/entry/calling.h #define PTI_USER_PGTABLE_AND_PCID_MASK  (PTI_USER_PCID_MASK | PTI_USER_PGTABLE_MASK)
PTI_USER_PCID_MASK  235 arch/x86/entry/calling.h 	orq	$(PTI_USER_PCID_MASK), \scratch_reg