diff --git a/src/cmd/compile/internal/ssa/config.go b/src/cmd/compile/internal/ssa/config.go
index c36ac4cd5d..debcf1a0f4 100644
--- a/src/cmd/compile/internal/ssa/config.go
+++ b/src/cmd/compile/internal/ssa/config.go
@@ -283,8 +283,8 @@ func NewConfig(arch string, types Types, ctxt *obj.Link, optimize, softfloat boo
 		c.registers = registersLOONG64[:]
 		c.gpRegMask = gpRegMaskLOONG64
 		c.fpRegMask = fpRegMaskLOONG64
-		// c.intParamRegs = paramIntRegLOONG64
-		// c.floatParamRegs = paramFloatRegLOONG64
+		c.intParamRegs = paramIntRegLOONG64
+		c.floatParamRegs = paramFloatRegLOONG64
 		c.FPReg = framepointerRegLOONG64
 		c.LinkReg = linkRegLOONG64
 		c.hasGReg = true
diff --git a/src/cmd/compile/internal/ssa/debug_lines_test.go b/src/cmd/compile/internal/ssa/debug_lines_test.go
index cf115107a1..af9e2a34cf 100644
--- a/src/cmd/compile/internal/ssa/debug_lines_test.go
+++ b/src/cmd/compile/internal/ssa/debug_lines_test.go
@@ -44,7 +44,7 @@ func testGoArch() string {
 
 func hasRegisterABI() bool {
 	switch testGoArch() {
-	case "amd64", "arm64", "ppc64", "ppc64le", "riscv":
+	case "amd64", "arm64", "loong64", "ppc64", "ppc64le", "riscv":
 		return true
 	}
 	return false
diff --git a/src/internal/buildcfg/exp.go b/src/internal/buildcfg/exp.go
index c6a6c84f3c..75ed7b2459 100644
--- a/src/internal/buildcfg/exp.go
+++ b/src/internal/buildcfg/exp.go
@@ -65,6 +65,8 @@ func ParseGOEXPERIMENT(goos, goarch, goexp string) (*ExperimentFlags, error) {
 	case "amd64", "arm64", "ppc64le", "ppc64", "riscv64":
 		regabiAlwaysOn = true
 		regabiSupported = true
+	case "loong64":
+		regabiSupported = true
 	}
 
 	baseline := goexperiment.Flags{
@@ -130,7 +132,7 @@ func ParseGOEXPERIMENT(goos, goarch, goexp string) (*ExperimentFlags, error) {
 		flags.RegabiWrappers = true
 		flags.RegabiArgs = true
 	}
-	// regabi is only supported on amd64, arm64, riscv64, ppc64 and ppc64le.
+	// regabi is only supported on amd64, arm64, loong64, riscv64, ppc64 and ppc64le.
 	if !regabiSupported {
 		flags.RegabiWrappers = false
 		flags.RegabiArgs = false