diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
index d8655e52aa323..6bd5e0f8f196c 100644
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -135,6 +135,15 @@ Windows Support
 LoongArch Support
 ^^^^^^^^^^^^^^^^^
 
+- Patchable function entry (``-fpatchable-function-entry``) is now supported
+  on LoongArch.
+- Unaligned memory accesses can be toggled by ``-m[no-]unaligned-access`` or the
+  aliases ``-m[no-]strict-align``.
+- Non ``$``-prefixed GPR names (e.g. ``r4`` and ``a0``) are allowed in inlineasm
+  like GCC does.
+- The ``-march=native`` ``-mtune=`` options and ``__loongarch_{arch,tune}``
+  macros are now supported.
+
 RISC-V Support
 ^^^^^^^^^^^^^^
 
diff --git a/clang/lib/Basic/Targets/LoongArch.cpp b/clang/lib/Basic/Targets/LoongArch.cpp
index 6958479cd7c42..f08e5e732b035 100644
--- a/clang/lib/Basic/Targets/LoongArch.cpp
+++ b/clang/lib/Basic/Targets/LoongArch.cpp
@@ -15,7 +15,7 @@
 #include "clang/Basic/MacroBuilder.h"
 #include "clang/Basic/TargetBuiltins.h"
 #include "llvm/Support/raw_ostream.h"
-#include "llvm/TargetParser/TargetParser.h"
+#include "llvm/TargetParser/LoongArchTargetParser.h"
 
 using namespace clang;
 using namespace clang::targets;
@@ -198,7 +198,19 @@ void LoongArchTargetInfo::getTargetDefines(const LangOptions &Opts,
   else
     Builder.defineMacro("__loongarch_frlen", "0");
 
-  // TODO: define __loongarch_arch and __loongarch_tune.
+  // Define __loongarch_arch.
+  StringRef Arch = llvm::LoongArch::getArch();
+  if (Arch.empty())
+    Arch = llvm::LoongArch::getDefaultArch(GRLen == 64);
+  if (!Arch.empty())
+    Builder.defineMacro("__loongarch_arch", Arch);
+
+  // Define __loongarch_tune.
+  StringRef TuneCPU = llvm::LoongArch::getTuneCPU();
+  if (TuneCPU.empty())
+    TuneCPU = Arch;
+  if (!TuneCPU.empty())
+    Builder.defineMacro("__loongarch_tune", TuneCPU);
 
   StringRef ABI = getABI();
   if (ABI == "lp64d" || ABI == "lp64f" || ABI == "lp64s")
@@ -270,3 +282,12 @@ bool LoongArchTargetInfo::handleTargetFeatures(
   }
   return true;
 }
+
+bool LoongArchTargetInfo::isValidTuneCPUName(StringRef Name) const {
+  return llvm::LoongArch::isValidTuneCPUName(Name);
+}
+
+void LoongArchTargetInfo::fillValidTuneCPUList(
+    SmallVectorImpl<StringRef> &Values) const {
+  llvm::LoongArch::fillValidTuneCPUList(Values);
+}
diff --git a/clang/lib/Basic/Targets/LoongArch.h b/clang/lib/Basic/Targets/LoongArch.h
index 52c4ce4253689..60d545566b30f 100644
--- a/clang/lib/Basic/Targets/LoongArch.h
+++ b/clang/lib/Basic/Targets/LoongArch.h
@@ -80,6 +80,9 @@ class LLVM_LIBRARY_VISIBILITY LoongArchTargetInfo : public TargetInfo {
                  const std::vector<std::string> &FeaturesVec) const override;
 
   bool hasFeature(StringRef Feature) const override;
+
+  bool isValidTuneCPUName(StringRef Name) const override;
+  void fillValidTuneCPUList(SmallVectorImpl<StringRef> &Values) const override;
 };
 
 class LLVM_LIBRARY_VISIBILITY LoongArch32TargetInfo
diff --git a/clang/lib/Driver/ToolChains/Arch/LoongArch.cpp b/clang/lib/Driver/ToolChains/Arch/LoongArch.cpp
index 856ad58f3bd9d..6cbb06b9a91f5 100644
--- a/clang/lib/Driver/ToolChains/Arch/LoongArch.cpp
+++ b/clang/lib/Driver/ToolChains/Arch/LoongArch.cpp
@@ -12,6 +12,7 @@
 #include "clang/Driver/Driver.h"
 #include "clang/Driver/DriverDiagnostic.h"
 #include "clang/Driver/Options.h"
+#include "llvm/TargetParser/Host.h"
 #include "llvm/TargetParser/LoongArchTargetParser.h"
 
 using namespace clang::driver;
@@ -128,21 +129,29 @@ void loongarch::getLoongArchTargetFeatures(const Driver &D,
                                            std::vector<StringRef> &Features) {
   StringRef ArchName;
   if (const Arg *A = Args.getLastArg(options::OPT_march_EQ)) {
-    if (!llvm::LoongArch::isValidArchName(A->getValue())) {
+    ArchName = A->getValue();
+
+    // Handle -march=native.
+    if (ArchName == "native") {
+      ArchName = llvm::sys::getHostCPUName();
+      if (ArchName == "generic")
+        ArchName = llvm::LoongArch::getDefaultArch(Triple.isLoongArch64());
+    }
+
+    if (!llvm::LoongArch::isValidArchName(ArchName)) {
       D.Diag(clang::diag::err_drv_invalid_arch_name) << A->getAsString(Args);
       return;
     }
-    ArchName = A->getValue();
   }
 
-  // TODO: handle -march=native and -mtune=xx.
-
   // Select a default arch name.
-  if (ArchName.empty() && Triple.isLoongArch64())
-    ArchName = "loongarch64";
+  if (ArchName.empty())
+    ArchName = llvm::LoongArch::getDefaultArch(Triple.isLoongArch64());
 
-  if (!ArchName.empty())
+  if (!ArchName.empty()) {
     llvm::LoongArch::getArchFeatures(ArchName, Features);
+    llvm::LoongArch::setArch(ArchName);
+  }
 
   // Select floating-point features determined by -mdouble-float,
   // -msingle-float, -msoft-float and -mfpu.
diff --git a/clang/lib/Driver/ToolChains/Clang.cpp b/clang/lib/Driver/ToolChains/Clang.cpp
index adb550d9c5da5..e3fa315ffcb1e 100644
--- a/clang/lib/Driver/ToolChains/Clang.cpp
+++ b/clang/lib/Driver/ToolChains/Clang.cpp
@@ -56,6 +56,7 @@
 #include "llvm/Support/YAMLParser.h"
 #include "llvm/TargetParser/ARMTargetParserCommon.h"
 #include "llvm/TargetParser/Host.h"
+#include "llvm/TargetParser/LoongArchTargetParser.h"
 #include "llvm/TargetParser/RISCVTargetParser.h"
 #include <cctype>
 
@@ -1853,10 +1854,25 @@ void Clang::AddAArch64TargetArgs(const ArgList &Args,
 
 void Clang::AddLoongArchTargetArgs(const ArgList &Args,
                                    ArgStringList &CmdArgs) const {
+  const llvm::Triple &Triple = getToolChain().getTriple();
+
   CmdArgs.push_back("-target-abi");
-  CmdArgs.push_back(loongarch::getLoongArchABI(getToolChain().getDriver(), Args,
-                                               getToolChain().getTriple())
-                        .data());
+  CmdArgs.push_back(
+      loongarch::getLoongArchABI(getToolChain().getDriver(), Args, Triple)
+          .data());
+
+  // Handle -mtune.
+  if (const Arg *A = Args.getLastArg(options::OPT_mtune_EQ)) {
+    StringRef TuneCPU = A->getValue();
+    if (TuneCPU == "native") {
+      TuneCPU = llvm::sys::getHostCPUName();
+      if (TuneCPU == "generic")
+        TuneCPU = llvm::LoongArch::getDefaultArch(Triple.isLoongArch64());
+    }
+    CmdArgs.push_back("-tune-cpu");
+    CmdArgs.push_back(Args.MakeArgString(TuneCPU));
+    llvm::LoongArch::setTuneCPU(TuneCPU);
+  }
 }
 
 void Clang::AddMIPSTargetArgs(const ArgList &Args,
diff --git a/clang/test/Driver/loongarch-mtune-error.c b/clang/test/Driver/loongarch-mtune-error.c
new file mode 100644
index 0000000000000..a029c3cbf5e11
--- /dev/null
+++ b/clang/test/Driver/loongarch-mtune-error.c
@@ -0,0 +1,6 @@
+// RUN: not %clang --target=loongarch64 -mtune=invalidcpu -fsyntax-only %s 2>&1 | FileCheck %s
+// RUN: not %clang --target=loongarch64 -mtune=generic -fsyntax-only %s 2>&1 | FileCheck %s
+// RUN: not %clang --target=loongarch64 -mtune=generic-la64 -fsyntax-only %s 2>&1 | FileCheck %s
+
+// CHECK: error: unknown target CPU '{{.*}}'
+// CHECK-NEXT: note: valid target CPU values are: {{.*}}
diff --git a/clang/test/Driver/loongarch-mtune.c b/clang/test/Driver/loongarch-mtune.c
new file mode 100644
index 0000000000000..a1d17ab4161a8
--- /dev/null
+++ b/clang/test/Driver/loongarch-mtune.c
@@ -0,0 +1,16 @@
+// RUN: %clang --target=loongarch64 -mtune=loongarch64 -fsyntax-only %s -### 2>&1 | \
+// RUN:   FileCheck %s --check-prefix=CC1ARG -DCPU=loongarch64
+// RUN: %clang --target=loongarch64 -mtune=loongarch64 -S -emit-llvm %s -o - | \
+// RUN:   FileCheck %s --check-prefix=IRATTR -DCPU=loongarch64
+//
+// RUN: %clang --target=loongarch64 -mtune=la464 -fsyntax-only %s -### 2>&1 | \
+// RUN:   FileCheck %s --check-prefix=CC1ARG -DCPU=la464
+// RUN: %clang --target=loongarch64 -mtune=la464 -S -emit-llvm %s -o - | \
+// RUN:   FileCheck %s --check-prefix=IRATTR -DCPU=la464
+
+// CC1ARG: "-tune-cpu" "[[CPU]]"
+// IRATTR: "tune-cpu"="[[CPU]]"
+
+int foo(void) {
+  return 3;
+}
diff --git a/clang/test/Preprocessor/init-loongarch.c b/clang/test/Preprocessor/init-loongarch.c
index 055431479f242..c3bc4d6b58dbd 100644
--- a/clang/test/Preprocessor/init-loongarch.c
+++ b/clang/test/Preprocessor/init-loongarch.c
@@ -787,3 +787,23 @@
 // LA64-FPU0-LP64S: #define __loongarch_lp64 1
 // LA64-FPU0-LP64S-NOT: #define __loongarch_single_float
 // LA64-FPU0-LP64S: #define __loongarch_soft_float 1
+
+/// Check __loongarch_arch and __loongarch_tune.
+
+// RUN: %clang --target=loongarch64 -x c -E -dM %s -o - | \
+// RUN:   FileCheck --match-full-lines --check-prefix=ARCH-TUNE -DARCH=loongarch64 -DTUNE=loongarch64 %s
+// RUN: %clang --target=loongarch64 -x c -E -dM %s -o - -march=loongarch64 | \
+// RUN:   FileCheck --match-full-lines --check-prefix=ARCH-TUNE -DARCH=loongarch64 -DTUNE=loongarch64 %s
+// RUN: %clang --target=loongarch64 -x c -E -dM %s -o - -march=la464 | \
+// RUN:   FileCheck --match-full-lines --check-prefix=ARCH-TUNE -DARCH=la464 -DTUNE=la464 %s
+// RUN: %clang --target=loongarch64 -x c -E -dM %s -o - -mtune=loongarch64 | \
+// RUN:   FileCheck --match-full-lines --check-prefix=ARCH-TUNE -DARCH=loongarch64 -DTUNE=loongarch64 %s
+// RUN: %clang --target=loongarch64 -x c -E -dM %s -o - -mtune=la464 | \
+// RUN:   FileCheck --match-full-lines --check-prefix=ARCH-TUNE -DARCH=loongarch64 -DTUNE=la464 %s
+// RUN: %clang --target=loongarch64 -x c -E -dM %s -o - -march=loongarch64 -mtune=la464 | \
+// RUN:   FileCheck --match-full-lines --check-prefix=ARCH-TUNE -DARCH=loongarch64 -DTUNE=la464 %s
+// RUN: %clang --target=loongarch64 -x c -E -dM %s -o - -march=la464 -mtune=loongarch64 | \
+// RUN:   FileCheck --match-full-lines --check-prefix=ARCH-TUNE -DARCH=la464 -DTUNE=loongarch64 %s
+
+// ARCH-TUNE: #define __loongarch_arch [[ARCH]]
+// ARCH-TUNE: #define __loongarch_tune [[TUNE]]
diff --git a/llvm/include/llvm/TargetParser/LoongArchTargetParser.h b/llvm/include/llvm/TargetParser/LoongArchTargetParser.h
index 2aa65ec070ec3..82ab064211d76 100644
--- a/llvm/include/llvm/TargetParser/LoongArchTargetParser.h
+++ b/llvm/include/llvm/TargetParser/LoongArchTargetParser.h
@@ -66,9 +66,16 @@ struct ArchInfo {
 
 bool isValidArchName(StringRef Arch);
 bool getArchFeatures(StringRef Arch, std::vector<StringRef> &Features);
+bool isValidTuneCPUName(StringRef TuneCPU);
+void fillValidTuneCPUList(SmallVectorImpl<StringRef> &Values);
+StringRef getDefaultArch(bool Is64Bit);
+void setArch(StringRef Arch);
+StringRef getArch();
+void setTuneCPU(StringRef TuneCPU);
+StringRef getTuneCPU();
 
 } // namespace LoongArch
 
 } // namespace llvm
 
-#endif // LLVM_SUPPORT_LOONGARCHTARGETPARSER_H
+#endif // LLVM_TARGETPARSER_LOONGARCHTARGETPARSER_H
diff --git a/llvm/lib/Target/LoongArch/LoongArch.td b/llvm/lib/Target/LoongArch/LoongArch.td
index 7241a5d63526f..0675caa3b6014 100644
--- a/llvm/lib/Target/LoongArch/LoongArch.td
+++ b/llvm/lib/Target/LoongArch/LoongArch.td
@@ -117,6 +117,11 @@ include "LoongArchInstrInfo.td"
 def : ProcessorModel<"generic-la32", NoSchedModel, [Feature32Bit]>;
 def : ProcessorModel<"generic-la64", NoSchedModel, [Feature64Bit, FeatureUAL]>;
 
+// Generic 64-bit processor with double-precision floating-point support.
+def : ProcessorModel<"loongarch64", NoSchedModel, [Feature64Bit,
+                                                   FeatureUAL,
+                                                   FeatureBasicD]>;
+
 // Support generic for compatibility with other targets. The triple will be used
 // to change to the appropriate la32/la64 version.
 def : ProcessorModel<"generic", NoSchedModel, []>;
diff --git a/llvm/lib/TargetParser/LoongArchTargetParser.cpp b/llvm/lib/TargetParser/LoongArchTargetParser.cpp
index 18b04600dbc66..72781513ff120 100644
--- a/llvm/lib/TargetParser/LoongArchTargetParser.cpp
+++ b/llvm/lib/TargetParser/LoongArchTargetParser.cpp
@@ -16,6 +16,9 @@
 using namespace llvm;
 using namespace llvm::LoongArch;
 
+StringRef Arch;
+StringRef TuneCPU;
+
 const FeatureInfo AllFeatures[] = {
 #define LOONGARCH_FEATURE(NAME, KIND) {NAME, KIND},
 #include "llvm/TargetParser/LoongArchTargetParser.def"
@@ -46,3 +49,25 @@ bool LoongArch::getArchFeatures(StringRef Arch,
   }
   return false;
 }
+
+bool LoongArch::isValidTuneCPUName(StringRef TuneCPU) {
+  return isValidArchName(TuneCPU);
+}
+
+void LoongArch::fillValidTuneCPUList(SmallVectorImpl<StringRef> &Values) {
+  for (const auto A : AllArchs)
+    Values.emplace_back(A.Name);
+}
+
+StringRef LoongArch::getDefaultArch(bool Is64Bit) {
+  // TODO: use a real 32-bit arch name.
+  return Is64Bit ? "loongarch64" : "";
+}
+
+void LoongArch::setArch(StringRef Name) { Arch = Name; }
+
+StringRef LoongArch::getArch() { return Arch; }
+
+void LoongArch::setTuneCPU(StringRef Name) { TuneCPU = Name; }
+
+StringRef LoongArch::getTuneCPU() { return TuneCPU; }
diff --git a/llvm/test/CodeGen/LoongArch/cpus-invalid.ll b/llvm/test/CodeGen/LoongArch/cpus-invalid.ll
new file mode 100644
index 0000000000000..b5435fb905006
--- /dev/null
+++ b/llvm/test/CodeGen/LoongArch/cpus-invalid.ll
@@ -0,0 +1,7 @@
+; RUN: llc < %s --mtriple=loongarch64 --mattr=+64bit --mcpu=invalidcpu 2>&1 | FileCheck %s
+
+; CHECK: {{.*}} is not a recognized processor for this target
+
+define void @f() {
+  ret void
+}
diff --git a/llvm/test/CodeGen/LoongArch/cpus.ll b/llvm/test/CodeGen/LoongArch/cpus.ll
new file mode 100644
index 0000000000000..35945ae4de71f
--- /dev/null
+++ b/llvm/test/CodeGen/LoongArch/cpus.ll
@@ -0,0 +1,20 @@
+;; This tests that llc accepts all valid LoongArch CPUs.
+;; Note the 'generic' names have been tested in cpu-name-generic.ll.
+
+; RUN: llc < %s --mtriple=loongarch64 --mcpu=loongarch64 2>&1 | FileCheck %s
+; RUN: llc < %s --mtriple=loongarch64 --mcpu=la464 2>&1 | FileCheck %s
+; RUN: llc < %s --mtriple=loongarch64 2>&1 | FileCheck %s
+
+; CHECK-NOT: {{.*}} is not a recognized processor for this target
+
+define void @f() {
+  ret void
+}
+
+define void @tune_cpu_loongarch64() "tune-cpu"="loongarch64" {
+  ret void
+}
+
+define void @tune_cpu_la464() "tune-cpu"="la464" {
+  ret void
+}