diff --git a/lldb/source/Plugins/Disassembler/LLVMC/DisassemblerLLVMC.cpp b/lldb/source/Plugins/Disassembler/LLVMC/DisassemblerLLVMC.cpp
--- a/lldb/source/Plugins/Disassembler/LLVMC/DisassemblerLLVMC.cpp
+++ b/lldb/source/Plugins/Disassembler/LLVMC/DisassemblerLLVMC.cpp
@@ -1180,7 +1180,9 @@
   // If any AArch64 variant, enable latest ISA with any optional
   // extensions like MTE.
   if (triple.isAArch64()) {
-    features_str += "+v9.3a,+mte";
+    features_str += "+v9.3a,+mte,+sm4,+sha2,+sha3,+aes,+fp16fml,+sve2-aes,+"
+                    "sve2-sm4,+sve2-sha3,+sve2-bitperm,+f32mm,+f64mm,+tme,+"
+                    "ls64,+sme,+sme-f64,+sme-i64,+spe,+rand,+brbe";
 
     if (triple.getVendor() == llvm::Triple::Apple)
       cpu = "apple-latest";
diff --git a/lldb/test/Shell/Commands/command-disassemble-aarch64-extensions.s b/lldb/test/Shell/Commands/command-disassemble-aarch64-extensions.s
new file mode 100644
--- /dev/null
+++ b/lldb/test/Shell/Commands/command-disassemble-aarch64-extensions.s
@@ -0,0 +1,104 @@
+# REQUIRES: aarch64
+
+# This checks that lldb's disassembler enables every extension that an AArch64
+# target could have.
+
+# RUN: llvm-mc -filetype=obj -triple aarch64-linux-gnueabihf %s -o %t \
+# RUN: --mattr=+tme,+mte,+crc,+lse,+rdm,+sm4,+sha3,+aes,+dotprod,+fullfp16 \
+# RUN: --mattr=+fp16fml,+sve,+sve2,+sve2-aes,+sve2-sm4,+sve2-sha3,+sve2-bitperm \
+# RUN: --mattr=+spe,+rcpc,+ssbs,+sb,+predres,+bf16,+mops,+hbc,+sme,+sme-i64 \
+# RUN: --mattr=+sme-f64,+flagm,+pauth,+brbe,+ls64,+f64mm,+f32mm,+i8mm,+rand
+# RUN: %lldb %t -o "disassemble -n fn" -o exit 2>&1 | FileCheck %s
+
+.globl  fn
+.type   fn, @function
+fn:
+  // These are in the same order as llvm/include/llvm/Support/AArch64TargetParser.def
+  crc32b w0, w0, w0                   // CRC
+  ldaddab w0, w0, [sp]                // LSE
+  sqrdmlah v0.4h, v1.4h, v2.4h        // RDM
+  // CRYPTO enables a combination of other features
+  sm4e v0.4s, v0.4s                   // SM4
+  bcax v0.16b, v0.16b, v0.16b, v0.16b // SHA3
+  sha256h q0, q0, v0.4s               // SHA256
+  aesd v0.16b, v0.16b                 // AES
+  sdot v0.2s, v1.8b, v2.8b            // DOTPROD
+  fcvt d0, s0                         // FP
+  addp v0.4s, v0.4s, v0.4s            // SIMD (neon)
+  fabs h1, h2                         // FP16
+  fmlal v0.2s, v1.2h, v2.2h           // FP16FML
+  psb csync                           // PROFILE/SPE
+  msr erxpfgctl_el1, x0               // RAS
+  abs z31.h, p7/m, z31.h              // SVE
+  sqdmlslbt z0.d, z1.s, z31.s         // SVE2
+  aesd z0.b, z0.b, z31.b              // SVE2AES
+  sm4e z0.s, z0.s, z0.s               // SVE2SM4
+  rax1 z0.d, z0.d, z0.d               // SVE2SHA3
+  bdep z0.b, z1.b, z31.b              // SVE2BITPERM
+  ldaprb w0, [x0, #0]                 // RCPC
+  mrs x0, rndr                        // RAND
+  irg x0, x0                          // MTE
+  mrs x2, ssbs                        // SSBS
+  sb                                  // SB
+  cfp rctx, x0                        // PREDRES
+  bfdot v2.2s, v3.4h, v4.4h           // BF16
+  smmla v1.4s, v16.16b, v31.16b       // I8MM
+  fmmla z0.s, z1.s, z2.s              // F32MM
+  fmmla z0.d, z1.d, z2.d              // F64MM
+  tcommit                             // TME
+  ld64b x0, [x13]                     // LS64
+  brb iall                            // BRBE
+  pacia x0, x1                        // PAUTH
+  cfinv                               // FLAGM
+  addha za0.s, p0/m, p0/m, z0.s       // SME
+  fmopa za0.d, p0/m, p0/m, z0.d, z0.d // SMEF64
+  addha za0.d, p0/m, p0/m, z0.d       // SMEI64
+lbl:
+  bc.eq lbl                           // HBC
+  cpyfp [x0]!, [x1]!, x2!             // MOPS
+  mrs x0, pmccntr_el0                 // PERFMON
+.fn_end:
+  .size   fn, .fn_end-fn
+
+# CHECK: command-disassemble-aarch64-extensions.s.tmp`fn:
+# CHECK: crc32b w0, w0, w0
+# CHECK: ldaddab w0, w0, [sp]
+# CHECK: sqrdmlah v0.4h, v1.4h, v2.4h
+# CHECK: sm4e   v0.4s, v0.4s
+# CHECK: bcax   v0.16b, v0.16b, v0.16b, v0.16b
+# CHECK: sha256h q0, q0, v0.4s
+# CHECK: aesd   v0.16b, v0.16b
+# CHECK: sdot   v0.2s, v1.8b, v2.8b
+# CHECK: fcvt   d0, s0
+# CHECK: addp   v0.4s, v0.4s, v0.4s
+# CHECK: fabs   h1, h2
+# CHECK: fmlal  v0.2s, v1.2h, v2.2h
+# CHECK: psb    csync
+# CHECK: msr    ERXPFGCTL_EL1, x0
+# CHECK: abs    z31.h, p7/m, z31.h
+# CHECK: sqdmlslbt z0.d, z1.s, z31.s
+# CHECK: aesd   z0.b, z0.b, z31.b
+# CHECK: sm4e   z0.s, z0.s, z0.s
+# CHECK: rax1   z0.d, z0.d, z0.d
+# CHECK: bdep   z0.b, z1.b, z31.b
+# CHECK: ldaprb w0, [x0]
+# CHECK: mrs    x0, RNDR
+# CHECK: irg    x0, x0
+# CHECK: mrs    x2, SSBS
+# CHECK: sb
+# CHECK: cfp    rctx, x0
+# CHECK: bfdot  v2.2s, v3.4h, v4.4h
+# CHECK: smmla  v1.4s, v16.16b, v31.16b
+# CHECK: fmmla  z0.s, z1.s, z2.s
+# CHECK: fmmla  z0.d, z1.d, z2.d
+# CHECK: tcommit
+# CHECK: ld64b  x0, [x13]
+# CHECK: brb    iall
+# CHECK: pacia  x0, x1
+# CHECK: cfinv
+# CHECK: addha  za0.s, p0/m, p0/m, z0.s
+# CHECK: fmopa  za0.d, p0/m, p0/m, z0.d, z0.d
+# CHECK: addha  za0.d, p0/m, p0/m, z0.d
+# CHECK: bc.eq  0x98
+# CHECK: cpyfp  [x0]!, [x1]!, x2!
+# CHECK: mrs    x0, PMCCNTR_EL0