diff --git a/arch/riscv/boot/dts/microchip/mpfs.dtsi b/arch/riscv/boot/dts/microchip/mpfs.dtsi
index 104504352e99..a6faf24f1dba 100644
--- a/arch/riscv/boot/dts/microchip/mpfs.dtsi
+++ b/arch/riscv/boot/dts/microchip/mpfs.dtsi
@@ -22,6 +22,9 @@
 			i-cache-size = <16384>;
 			reg = <0>;
 			riscv,isa = "rv64imac";
+			riscv,isa-base = "rv64i";
+			riscv,isa-extensions = "i", "m", "a", "c", "zicntr", "zicsr", "zifencei",
+					       "zihpm";
 			clocks = <&clkcfg CLK_CPU>;
 			status = "disabled";
 
@@ -48,6 +51,9 @@
 			mmu-type = "riscv,sv39";
 			reg = <1>;
 			riscv,isa = "rv64imafdc";
+			riscv,isa-base = "rv64i";
+			riscv,isa-extensions = "i", "m", "a", "f", "d", "c", "zicntr", "zicsr",
+					       "zifencei", "zihpm";
 			clocks = <&clkcfg CLK_CPU>;
 			tlb-split;
 			next-level-cache = <&cctrllr>;
@@ -76,6 +82,9 @@
 			mmu-type = "riscv,sv39";
 			reg = <2>;
 			riscv,isa = "rv64imafdc";
+			riscv,isa-base = "rv64i";
+			riscv,isa-extensions = "i", "m", "a", "f", "d", "c", "zicntr", "zicsr",
+					       "zifencei", "zihpm";
 			clocks = <&clkcfg CLK_CPU>;
 			tlb-split;
 			next-level-cache = <&cctrllr>;
@@ -104,6 +113,9 @@
 			mmu-type = "riscv,sv39";
 			reg = <3>;
 			riscv,isa = "rv64imafdc";
+			riscv,isa-base = "rv64i";
+			riscv,isa-extensions = "i", "m", "a", "f", "d", "c", "zicntr", "zicsr",
+					       "zifencei", "zihpm";
 			clocks = <&clkcfg CLK_CPU>;
 			tlb-split;
 			next-level-cache = <&cctrllr>;
@@ -132,6 +144,9 @@
 			mmu-type = "riscv,sv39";
 			reg = <4>;
 			riscv,isa = "rv64imafdc";
+			riscv,isa-base = "rv64i";
+			riscv,isa-extensions = "i", "m", "a", "f", "d", "c", "zicntr", "zicsr",
+					       "zifencei", "zihpm";
 			clocks = <&clkcfg CLK_CPU>;
 			tlb-split;
 			next-level-cache = <&cctrllr>;