diff --git a/lib/std/Target.zig b/lib/std/Target.zig
index b8d6fc7ec8496de4fd5c25590cc69e2a28f1a0c3..20273264deedfcb0b9d61bcb5a3fb67b8bc54eb5 100644
--- a/lib/std/Target.zig
+++ b/lib/std/Target.zig
@@ -1952,9 +1952,11 @@ pub const Cpu = struct {
                 => &.{.lanai},
 
                 .loongarch64_lp64,
+                .loongarch64_preserve_none,
                 => &.{.loongarch64},
 
                 .loongarch32_ilp32,
+                .loongarch32_preserve_none,
                 => &.{.loongarch32},
 
                 .m68k_sysv,
diff --git a/lib/std/lang.zig b/lib/std/lang.zig
index 7af113b525fa997b2f82b336ffaafa3bc4737f50..3a00eac5bdae46871f616a6b54aa3d1560da8ce1 100644
--- a/lib/std/lang.zig
+++ b/lib/std/lang.zig
@@ -324,9 +324,11 @@ pub const CallingConvention = union(enum(u8)) {
 
     /// The standard `loongarch64` calling convention.
     loongarch64_lp64: CommonOptions,
+    loongarch64_preserve_none: CommonOptions,
 
     /// The standard `loongarch32` calling convention.
     loongarch32_ilp32: CommonOptions,
+    loongarch32_preserve_none: CommonOptions,
 
     // Calling conventions for the `m68k` architecture.
     m68k_sysv: CommonOptions,
diff --git a/src/Zcu.zig b/src/Zcu.zig
index 1d309e0d599476fec9b3a5780b6ca1fe5615f5b0..aa3b7f8e66a02a5bd39ef5686fcb9c3f0adaad29 100644
--- a/src/Zcu.zig
+++ b/src/Zcu.zig
@@ -4621,6 +4621,8 @@ pub fn callconvSupported(zcu: *Zcu, cc: std.lang.CallingConvention) union(enum)
                 .avr_interrupt,
                 .avr_signal,
                 .ez80_tiflags,
+                .loongarch32_preserve_none,
+                .loongarch64_preserve_none,
                 .naked,
                 => true, // incoming stack alignment supported
 
diff --git a/src/codegen/c/type.zig b/src/codegen/c/type.zig
index 01b474dc9c7cfa2c995cae0f3e75b238b8447619..d7e68012a6b81cf6b3c0518974b18d67102e09de 100644
--- a/src/codegen/c/type.zig
+++ b/src/codegen/c/type.zig
@@ -142,6 +142,8 @@ pub const CType = union(enum) {
 
                 .x86_64_preserve_none,
                 .aarch64_preserve_none,
+                .loongarch32_preserve_none,
+                .loongarch64_preserve_none,
                 => .preserve_none,
 
                 .aarch64_vfabi => .aarch64_vector_pcs,
diff --git a/src/codegen/llvm.zig b/src/codegen/llvm.zig
index 8cf3b976ce487e65bf11a1c711cab6b6ce255284..50e014e4c6db8e7b3385c8f9451ed029de1cfbd4 100644
--- a/src/codegen/llvm.zig
+++ b/src/codegen/llvm.zig
@@ -4307,6 +4307,8 @@ pub fn toLlvmCallConvTag(cc_tag: std.lang.CallingConvention.Tag, target: *const
         .amdgcn_cs => .amdgpu_cs,
         .nvptx_device => .ptx_device,
         .nvptx_kernel => .ptx_kernel,
+        .loongarch32_preserve_none => .preserve_nonecc,
+        .loongarch64_preserve_none => .preserve_nonecc,
 
         // Calling conventions which LLVM uses function attributes for.
         .riscv64_interrupt,
diff --git a/src/link/Dwarf.zig b/src/link/Dwarf.zig
index a73874ea0259b566444233452028d36ec99479e3..c74c07eddec79c75f45996d128104bcc1570ca8f 100644
--- a/src/link/Dwarf.zig
+++ b/src/link/Dwarf.zig
@@ -4175,6 +4175,9 @@ fn updateConstInner(dwarf: *Dwarf, pt: Zcu.PerThread, debug_const_index: link.Co
                     .riscv32_ilp32_v,
                     => .LLVM_RISCVVectorCall,
 
+                    .loongarch32_preserve_none => .LLVM_PreserveNone,
+                    .loongarch64_preserve_none => .LLVM_PreserveNone,
+
                     .m68k_rtd => .LLVM_M68kRTD,
 
                     .sh_renesas => .GNU_renesas_sh,
diff --git a/test/c_abi/cfuncs.c b/test/c_abi/cfuncs.c
index 327bc04ceb34148541b994bb894f04bea85bf210..cce4f0d77497f2c6579fcd25eb0a6028dc2b1064 100644
--- a/test/c_abi/cfuncs.c
+++ b/test/c_abi/cfuncs.c
@@ -16624,7 +16624,7 @@ struct ByRef __attribute__((sysv_abi)) c_explict_sys_v(struct ByRef in) {
 }
 #endif
 
-#if defined __x86_64__ || defined __aarch64__
+#if defined __x86_64__ || defined __aarch64__ || defined __loongarch__
 int __attribute__((preserve_none)) c_preserve_none(int x) {
     return x + 1;
 }
diff --git a/test/c_abi/main.zig b/test/c_abi/main.zig
index a481a015117276e8abf7c4393f6d85cf60dd20fb..e7b98a181148e9aecfe3aeb775e8e3f62c15f036 100644
--- a/test/c_abi/main.zig
+++ b/test/c_abi/main.zig
@@ -18045,6 +18045,9 @@ const preserve_none_cc: ?std.lang.CallingConvention = if (builtin.zig_backend !=
 else switch (builtin.cpu.arch) {
     .x86_64 => .{ .x86_64_preserve_none = .{} },
     .aarch64, .aarch64_be => .{ .aarch64_preserve_none = .{} },
+    // Supported in LLVM but not yet wired up in Clang.
+    // .loongarch32 => .{ .loongarch32_preserve_none = .{} },
+    // .loongarch64 => .{ .loongarch64_preserve_none = .{} },
     else => null,
 };