Index: llvm/lib/Target/AArch64/AArch64SystemOperands.td
===================================================================
--- llvm/lib/Target/AArch64/AArch64SystemOperands.td
+++ llvm/lib/Target/AArch64/AArch64SystemOperands.td
@@ -1452,11 +1452,11 @@
 def : RWSysReg<"TCO",              0b11, 0b011, 0b0100, 0b0010, 0b111>;
 def : RWSysReg<"GCR_EL1",          0b11, 0b000, 0b0001, 0b0000, 0b110>;
 def : RWSysReg<"RGSR_EL1",         0b11, 0b000, 0b0001, 0b0000, 0b101>;
-def : RWSysReg<"TFSR_EL1",         0b11, 0b000, 0b0110, 0b0101, 0b000>;
-def : RWSysReg<"TFSR_EL2",         0b11, 0b100, 0b0110, 0b0101, 0b000>;
-def : RWSysReg<"TFSR_EL3",         0b11, 0b110, 0b0110, 0b0110, 0b000>;
-def : RWSysReg<"TFSR_EL12",        0b11, 0b101, 0b0110, 0b0110, 0b000>;
-def : RWSysReg<"TFSRE0_EL1",       0b11, 0b000, 0b0110, 0b0110, 0b001>;
+def : RWSysReg<"TFSR_EL1",         0b11, 0b000, 0b0101, 0b0110, 0b000>;
+def : RWSysReg<"TFSR_EL2",         0b11, 0b100, 0b0101, 0b0110, 0b000>;
+def : RWSysReg<"TFSR_EL3",         0b11, 0b110, 0b0101, 0b0110, 0b000>;
+def : RWSysReg<"TFSR_EL12",        0b11, 0b101, 0b0101, 0b0110, 0b000>;
+def : RWSysReg<"TFSRE0_EL1",       0b11, 0b000, 0b0101, 0b0110, 0b001>;
 def : ROSysReg<"GMID_EL1",         0b11, 0b001, 0b0000, 0b0000, 0b100>;
 } // HasMTE
 
Index: llvm/test/MC/AArch64/armv8.5a-mte.s
===================================================================
--- llvm/test/MC/AArch64/armv8.5a-mte.s
+++ llvm/test/MC/AArch64/armv8.5a-mte.s
@@ -473,11 +473,11 @@
 // CHECK: mrs x0, TCO           // encoding: [0xe0,0x42,0x3b,0xd5]
 // CHECK: mrs x1, GCR_EL1       // encoding: [0xc1,0x10,0x38,0xd5]
 // CHECK: mrs x2, RGSR_EL1      // encoding: [0xa2,0x10,0x38,0xd5]
-// CHECK: mrs x3, TFSR_EL1      // encoding: [0x03,0x65,0x38,0xd5]
-// CHECK: mrs x4, TFSR_EL2      // encoding: [0x04,0x65,0x3c,0xd5]
-// CHECK: mrs x5, TFSR_EL3      // encoding: [0x05,0x66,0x3e,0xd5]
-// CHECK: mrs x6, TFSR_EL12     // encoding: [0x06,0x66,0x3d,0xd5]
-// CHECK: mrs x7, TFSRE0_EL1    // encoding: [0x27,0x66,0x38,0xd5]
+// CHECK: mrs x3, TFSR_EL1      // encoding: [0x03,0x56,0x38,0xd5]
+// CHECK: mrs x4, TFSR_EL2      // encoding: [0x04,0x56,0x3c,0xd5]
+// CHECK: mrs x5, TFSR_EL3      // encoding: [0x05,0x56,0x3e,0xd5]
+// CHECK: mrs x6, TFSR_EL12     // encoding: [0x06,0x56,0x3d,0xd5]
+// CHECK: mrs x7, TFSRE0_EL1    // encoding: [0x27,0x56,0x38,0xd5]
 // CHECK: mrs x7, GMID_EL1      // encoding: [0x87,0x00,0x39,0xd5]
 
 // NOMTE: expected readable system register
@@ -518,11 +518,11 @@
 // CHECK: msr TCO, x0           // encoding: [0xe0,0x42,0x1b,0xd5]
 // CHECK: msr GCR_EL1, x1       // encoding: [0xc1,0x10,0x18,0xd5]
 // CHECK: msr RGSR_EL1, x2      // encoding: [0xa2,0x10,0x18,0xd5]
-// CHECK: msr TFSR_EL1, x3      // encoding: [0x03,0x65,0x18,0xd5]
-// CHECK: msr TFSR_EL2, x4      // encoding: [0x04,0x65,0x1c,0xd5]
-// CHECK: msr TFSR_EL3, x5      // encoding: [0x05,0x66,0x1e,0xd5]
-// CHECK: msr TFSR_EL12, x6     // encoding: [0x06,0x66,0x1d,0xd5]
-// CHECK: msr TFSRE0_EL1, x7    // encoding: [0x27,0x66,0x18,0xd5]
+// CHECK: msr TFSR_EL1, x3      // encoding: [0x03,0x56,0x18,0xd5]
+// CHECK: msr TFSR_EL2, x4      // encoding: [0x04,0x56,0x1c,0xd5]
+// CHECK: msr TFSR_EL3, x5      // encoding: [0x05,0x56,0x1e,0xd5]
+// CHECK: msr TFSR_EL12, x6     // encoding: [0x06,0x56,0x1d,0xd5]
+// CHECK: msr TFSRE0_EL1, x7    // encoding: [0x27,0x56,0x18,0xd5]
 
 // NOMTE: expected writable system register or pstate
 // NOMTE-NEXT: tco
Index: llvm/test/MC/Disassembler/AArch64/armv8.5a-mte.txt
===================================================================
--- llvm/test/MC/Disassembler/AArch64/armv8.5a-mte.txt
+++ llvm/test/MC/Disassembler/AArch64/armv8.5a-mte.txt
@@ -549,11 +549,11 @@
 [0xe0,0x42,0x3b,0xd5]
 [0xc1,0x10,0x38,0xd5]
 [0xa2,0x10,0x38,0xd5]
-[0x03,0x65,0x38,0xd5]
-[0x04,0x65,0x3c,0xd5]
-[0x05,0x66,0x3e,0xd5]
-[0x06,0x66,0x3d,0xd5]
-[0x27,0x66,0x38,0xd5]
+[0x03,0x56,0x38,0xd5]
+[0x04,0x56,0x3c,0xd5]
+[0x05,0x56,0x3e,0xd5]
+[0x06,0x56,0x3d,0xd5]
+[0x27,0x56,0x38,0xd5]
 [0x88,0x00,0x39,0xd5]
 
 # CHECK: mrs x0, TCO
@@ -569,11 +569,11 @@
 # NOMTE: mrs x0, S3_3_C4_C2_7
 # NOMTE: mrs x1, S3_0_C1_C0_6
 # NOMTE: mrs x2, S3_0_C1_C0_5
-# NOMTE: mrs x3, S3_0_C6_C5_0
-# NOMTE: mrs x4, S3_4_C6_C5_0
-# NOMTE: mrs x5, S3_6_C6_C6_0
-# NOMTE: mrs x6, S3_5_C6_C6_0
-# NOMTE: mrs x7, S3_0_C6_C6_1
+# NOMTE: mrs x3, S3_0_C5_C6_0
+# NOMTE: mrs x4, S3_4_C5_C6_0
+# NOMTE: mrs x5, S3_6_C5_C6_0
+# NOMTE: mrs x6, S3_5_C5_C6_0
+# NOMTE: mrs x7, S3_0_C5_C6_1
 # NOMTE: mrs x8, S3_1_C0_C0_4
 
 [0x9f,0x40,0x03,0xd5]
@@ -584,11 +584,11 @@
 [0xe0,0x42,0x1b,0xd5]
 [0xc1,0x10,0x18,0xd5]
 [0xa2,0x10,0x18,0xd5]
-[0x03,0x65,0x18,0xd5]
-[0x04,0x65,0x1c,0xd5]
-[0x05,0x66,0x1e,0xd5]
-[0x06,0x66,0x1d,0xd5]
-[0x27,0x66,0x18,0xd5]
+[0x03,0x56,0x18,0xd5]
+[0x04,0x56,0x1c,0xd5]
+[0x05,0x56,0x1e,0xd5]
+[0x06,0x56,0x1d,0xd5]
+[0x27,0x56,0x18,0xd5]
 [0x88,0x00,0x19,0xd5]
 
 # CHECK: msr TCO, x0
@@ -605,9 +605,9 @@
 # NOMTE: msr S3_3_C4_C2_7, x0
 # NOMTE: msr S3_0_C1_C0_6, x1
 # NOMTE: msr S3_0_C1_C0_5, x2
-# NOMTE: msr S3_0_C6_C5_0, x3
-# NOMTE: msr S3_4_C6_C5_0, x4
-# NOMTE: msr S3_6_C6_C6_0, x5
-# NOMTE: msr S3_5_C6_C6_0, x6
-# NOMTE: msr S3_0_C6_C6_1, x7
+# NOMTE: msr S3_0_C5_C6_0, x3
+# NOMTE: msr S3_4_C5_C6_0, x4
+# NOMTE: msr S3_6_C5_C6_0, x5
+# NOMTE: msr S3_5_C5_C6_0, x6
+# NOMTE: msr S3_0_C5_C6_1, x7
 # NOMTE: msr S3_1_C0_C0_4, x8