thanks, I have not the document about ID_AA64PFR0_EL1
armv8.1 and above has SVE.
i.MX8MM is A53 armv8
Arm® Architecture Reference Manual
Armv8, for A-profile architecture
please get from arm web site.
It is question for arm, more details get from arm.
you have no such document, download from arm.
dump from i.MX8MM ID_AA64PFR0_EL1 : 0x0000000000000011