diff -Naur qtquick3dphysics-everywhere-src-6.5.2/src/3rdparty/PhysX/pxshared/include/foundation/PxPreprocessor.h qtquick3dphysics-everywhere-src-6.5.2-change/src/3rdparty/PhysX/pxshared/include/foundation/PxPreprocessor.h
--- qtquick3dphysics-everywhere-src-6.5.2/src/3rdparty/PhysX/pxshared/include/foundation/PxPreprocessor.h	2024-06-27 16:11:54.523604123 +0800
+++ qtquick3dphysics-everywhere-src-6.5.2-change/src/3rdparty/PhysX/pxshared/include/foundation/PxPreprocessor.h	2024-06-27 16:07:34.811096872 +0800
@@ -129,6 +129,8 @@
 #define PX_X64 1
 #elif defined(__riscv) && __riscv_xlen == 64
 #define PX_RV64 1
+#elif defined(__loongarch__) && __loongarch_grlen == 64
+#define PX_LN64 1
 #else
 #error "Unknown architecture"
 #endif
@@ -149,7 +151,7 @@
 #endif
 
 /** Disable SIMD for webassembly, mips and arm64 */
-#if defined(__EMSCRIPTEN__) || defined(__mips__) || defined(_M_ARM64) || defined(_M_ARM) || defined(__riscv)
+#if defined(__EMSCRIPTEN__) || defined(__mips__) || defined(_M_ARM64) || defined(_M_ARM) || defined(__riscv) || defined(__loongarch__)
 #define PX_SIMD_DISABLED 1
 #endif
 
@@ -264,7 +266,7 @@
 // architecture
 #define PX_INTEL_FAMILY (PX_X64 || PX_X86)
 #define PX_ARM_FAMILY (PX_ARM || PX_A64)
-#define PX_P64_FAMILY (PX_X64 || PX_A64 || PX_RV64) // shortcut for 64-bit architectures
+#define PX_P64_FAMILY (PX_X64 || PX_A64 || PX_RV64 || PX_LN64) // shortcut for 64-bit architectures
 
 /**
 C++ standard library defines
diff -Naur qtquick3dphysics-everywhere-src-6.5.2/src/3rdparty/PhysX/source/physxextensions/src/serialization/SnSerialUtils.cpp qtquick3dphysics-everywhere-src-6.5.2-change/src/3rdparty/PhysX/source/physxextensions/src/serialization/SnSerialUtils.cpp
--- qtquick3dphysics-everywhere-src-6.5.2/src/3rdparty/PhysX/source/physxextensions/src/serialization/SnSerialUtils.cpp	2024-06-27 16:11:54.523604123 +0800
+++ qtquick3dphysics-everywhere-src-6.5.2-change/src/3rdparty/PhysX/source/physxextensions/src/serialization/SnSerialUtils.cpp	2024-06-27 16:11:09.539516263 +0800
@@ -39,7 +39,7 @@
 namespace
 {
 
-#define SN_NUM_BINARY_PLATFORMS 20
+#define SN_NUM_BINARY_PLATFORMS 21
 const PxU32 sBinaryPlatformTags[SN_NUM_BINARY_PLATFORMS] =
 {
 	PX_MAKE_FOURCC('W','_','3','2'),
@@ -60,6 +60,7 @@
 	PX_MAKE_FOURCC('W','A','6','4'),
 	PX_MAKE_FOURCC('L','A','3','2'),
 	PX_MAKE_FOURCC('L','V','6','4'),
+	PX_MAKE_FOURCC('L','N','6','4'),
 	PX_MAKE_FOURCC('U','N','K','_'),
 };
 
@@ -84,6 +85,7 @@
 	"macarm",
 	"linuxarm",
 	"linuxrv64",
+	"linuxln64",
 	"unknown",
 };
 
@@ -131,8 +133,10 @@
 	return sBinaryPlatformTags[17];
 #elif PX_LINUX && PX_RV64
 	return sBinaryPlatformTags[18];
-#else
+#elif PX_LINUX && PX_LN64
 	return sBinaryPlatformTags[19];
+#else
+	return sBinaryPlatformTags[20];
 #endif
 }