minstret

Machine Instructions Retired Counter

Counts the number of instructions retired by this hart from some arbitrary start point in the past.

Instructions that cause synchronous exceptions, including ecall and ebreak, are not considered to retire and hence do not increment the minstret CSR.

Attributes

Requirement

Defining extensions

Sm	Machine mode

CSR Address

0xb02

Length

64-bit

Privilege Mode

Figure 1. minstret format

Name	Location	Type	Reset Value
minstret.COUNT	63:0	RW-H	UNDEFINED_LEGAL

Name

Location

Type

Reset Value

63:0

RW-H

UNDEFINED_LEGAL

<%- if ext?(:Zicntr) -%> Aliased as instret.COUNT. <%- end -%>

Increments every time an instruction retires unless:

mcountinhibit.IR <%- if ext?(:Smcdeleg) -%>or its alias scountinhibit.IR<%- end -%> is set <%- if ext?(:Smcntrpmf) -%>
minstretcfg.MINH is set and the current privilege level is M <%- if ext?(:S) -%>
minstretcfg.SINH <%- if ext?(:Ssccfg) -%>or its alias instretcfg.SINH<%- end -%> is set and the current privilege level is (H)S <%- end -%> <%- if ext?(:U) -%>
minstretcfg.UINH <%- if ext?(:Ssccfg) -%>or its alias instretcfg.SINH<%- end -%> is set and the current privilege level is U <%- end -%> <%- if ext?(:H) -%>
minstretcfg.VSINH <%- if ext?(:Ssccfg) -%>or its alias instretcfg.SINH<%- end -%> is set and the current privilege level is VS
minstretcfg.VUINH <%- if ext?(:Ssccfg) -%>or its alias instretcfg.SINH<%- end -%> is set and the current privilege level is VU <%- end -%> <%- end -%>

An instruction that causes an exception, notably including MRET/SRET, does not retire and does not cause minstret.COUNT to increment.