The presence of X0 and the use of MSR to access a system register tells me that you are on 64-bit ARM / ARMv8.
The reference manual for this architecture can be found here
Section C6 describes the instructions. You can find
MSR (register) at C6.2.131 and
MSR (immediate) at C6.2.130. These both access system control registers.
Section D7 describes the generic ARMv8 system control registers. In D7.2.34 you can find the information that your
MSR instruction is accessing the
HPFAR_EL2 register which contains the "Hypervisor IPA Fault Address." (see the table at the bottom of the section that shows the values of op0/op1/CRn/Cm/op2 that correspond to this register.)
The two instructions you show above are therefore -
MSR HPFAR_EL2, X0
MSR PSTATEField_SP, #0