Merge tag 'loongarch-6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson

Pull LoongArch updates from Huacai Chen:

 - Switch to relative exception tables

 - Add unaligned access support

 - Add alternative runtime patching mechanism

 - Add FDT booting support from efi system table

 - Add suspend/hibernation (ACPI S3/S4) support

 - Add basic STACKPROTECTOR support

 - Add ftrace (function tracer) support

 - Update the default config file

* tag 'loongarch-6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson: (24 commits)
  LoongArch: Update Loongson-3 default config file
  LoongArch: modules/ftrace: Initialize PLT at load time
  LoongArch/ftrace: Add HAVE_FUNCTION_GRAPH_RET_ADDR_PTR support
  LoongArch/ftrace: Add HAVE_DYNAMIC_FTRACE_WITH_ARGS support
  LoongArch/ftrace: Add HAVE_DYNAMIC_FTRACE_WITH_REGS support
  LoongArch/ftrace: Add dynamic function graph tracer support
  LoongArch/ftrace: Add dynamic function tracer support
  LoongArch/ftrace: Add recordmcount support
  LoongArch/ftrace: Add basic support
  LoongArch: module: Use got/plt section indices for relocations
  LoongArch: Add basic STACKPROTECTOR support
  LoongArch: Add hibernation (ACPI S4) support
  LoongArch: Add suspend (ACPI S3) support
  LoongArch: Add processing ISA Node in DeviceTree
  LoongArch: Add FDT booting support from efi system table
  LoongArch: Use alternative to optimize libraries
  LoongArch: Add alternative runtime patching mechanism
  LoongArch: Add unaligned access support
  LoongArch: BPF: Add BPF exception tables
  LoongArch: Remove the .fixup section usage
  ...

scripts/mod/modpost.c

@@ -1523,6 +1523,14 @@ static int addend_mips_rel(struct elf_info *elf, Elf_Shdr *sechdr, Elf_Rela *r)
 #define R_RISCV_SUB32		39
 #endif
 
+#ifndef EM_LOONGARCH
+#define EM_LOONGARCH		258
+#endif
+
+#ifndef R_LARCH_SUB32
+#define R_LARCH_SUB32		55
+#endif
+
 static void section_rela(const char *modname, struct elf_info *elf,
 			 Elf_Shdr *sechdr)
 {
@@ -1564,6 +1572,11 @@ static void section_rela(const char *modname, struct elf_info *elf,
 			    ELF_R_TYPE(r.r_info) == R_RISCV_SUB32)
 				continue;
 			break;
+		case EM_LOONGARCH:
+			if (!strcmp("__ex_table", fromsec) &&
+			    ELF_R_TYPE(r.r_info) == R_LARCH_SUB32)
+				continue;
+			break;
 		}
 		sym = elf->symtab_start + r_sym;
 		/* Skip special sections */

scripts/recordmcount.c

@@ -38,6 +38,14 @@
 #define R_AARCH64_ABS64	257
 #endif
 
+#ifndef EM_LOONGARCH
+#define EM_LOONGARCH		258
+#define R_LARCH_32			1
+#define R_LARCH_64			2
+#define R_LARCH_MARK_LA			20
+#define R_LARCH_SOP_PUSH_PLT_PCREL	29
+#endif
+
 #define R_ARM_PC24		1
 #define R_ARM_THM_CALL		10
 #define R_ARM_CALL		28
@@ -441,6 +449,28 @@ static int arm64_is_fake_mcount(Elf64_Rel const *rp)
 	return ELF64_R_TYPE(w8(rp->r_info)) != R_AARCH64_CALL26;
 }
 
+static int LARCH32_is_fake_mcount(Elf32_Rel const *rp)
+{
+	switch (ELF64_R_TYPE(w(rp->r_info))) {
+	case R_LARCH_MARK_LA:
+	case R_LARCH_SOP_PUSH_PLT_PCREL:
+		return 0;
+	}
+
+	return 1;
+}
+
+static int LARCH64_is_fake_mcount(Elf64_Rel const *rp)
+{
+	switch (ELF64_R_TYPE(w(rp->r_info))) {
+	case R_LARCH_MARK_LA:
+	case R_LARCH_SOP_PUSH_PLT_PCREL:
+		return 0;
+	}
+
+	return 1;
+}
+
 /* 64-bit EM_MIPS has weird ELF64_Rela.r_info.
  * http://techpubs.sgi.com/library/manuals/4000/007-4658-001/pdf/007-4658-001.pdf
  * We interpret Table 29 Relocation Operation (Elf64_Rel, Elf64_Rela) [p.40]
@@ -558,6 +588,7 @@ static int do_file(char const *const fname)
 		break;
 	case EM_IA_64:	reltype = R_IA64_IMM64; break;
 	case EM_MIPS:	/* reltype: e_class    */ break;
+	case EM_LOONGARCH:	/* reltype: e_class    */ break;
 	case EM_PPC:	reltype = R_PPC_ADDR32; break;
 	case EM_PPC64:	reltype = R_PPC64_ADDR64; break;
 	case EM_S390:	/* reltype: e_class    */ break;
@@ -589,6 +620,10 @@ static int do_file(char const *const fname)
 			reltype = R_MIPS_32;
 			is_fake_mcount32 = MIPS32_is_fake_mcount;
 		}
+		if (w2(ehdr->e_machine) == EM_LOONGARCH) {
+			reltype = R_LARCH_32;
+			is_fake_mcount32 = LARCH32_is_fake_mcount;
+		}
 		if (do32(ehdr, fname, reltype) < 0)
 			goto out;
 		break;
@@ -610,6 +645,10 @@ static int do_file(char const *const fname)
 			Elf64_r_info = MIPS64_r_info;
 			is_fake_mcount64 = MIPS64_is_fake_mcount;
 		}
+		if (w2(ghdr->e_machine) == EM_LOONGARCH) {
+			reltype = R_LARCH_64;
+			is_fake_mcount64 = LARCH64_is_fake_mcount;
+		}
 		if (do64(ghdr, fname, reltype) < 0)
 			goto out;
 		break;

scripts/sorttable.c

@@ -304,6 +304,7 @@ static int do_file(char const *const fname, void *addr)
 	switch (r2(&ehdr->e_machine)) {
 	case EM_386:
 	case EM_AARCH64:
+	case EM_LOONGARCH:
 	case EM_RISCV:
 	case EM_S390:
 	case EM_X86_64:
@@ -317,7 +318,6 @@ static int do_file(char const *const fname, void *addr)
 	case EM_ARCOMPACT:
 	case EM_ARCV2:
 	case EM_ARM:
-	case EM_LOONGARCH:
 	case EM_MICROBLAZE:
 	case EM_MIPS:
 	case EM_XTENSA: