The VPIDR characteristics are:
Holds the value of the Virtualization Processor ID. This is the value returned by Non-secure EL1 reads of MIDR.See Table 4.148.
- Usage constraints
This register is accessible as follows:
(SCR.NS = 1)
(SCR.NS = 0)
- - - - RW RW -
VPIDR is architecturally mapped to AArch64 register VPIDR_EL2. See Virtualization Processor ID Register.
VPIDR is a 32-bit register.
VPIDR resets to the value of MIDR.
Figure 4.96 shows the VPIDR bit assignments.
Table 4.189 shows the VPIDR bit assignments.
MIDR value returned by Non-secure PL1 reads of the MIDR. The MIDR description defines the subdivision of this value. See Table 4.148.
To access the VPIDR:
MRC p15,4,<Rt>,c0,c0,0 ; Read VPIDR into Rt MCR p15,4,<Rt>,c0,c0,0 ; Write Rt to VPIDR
Register access is encoded as follows: