Merge tag 'loongarch-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson

Pull LoongArch updates from Huacai Chen:

 - Allow usage of LSX/LASX in the kernel, and use them for
   SIMD-optimized RAID5/RAID6 routines

 - Add Loongson Binary Translation (LBT) extension support

 - Add basic KGDB & KDB support

 - Add building with kcov coverage

 - Add KFENCE (Kernel Electric-Fence) support

 - Add KASAN (Kernel Address Sanitizer) support

 - Some bug fixes and other small changes

 - Update the default config file

* tag 'loongarch-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson: (25 commits)
  LoongArch: Update Loongson-3 default config file
  LoongArch: Add KASAN (Kernel Address Sanitizer) support
  LoongArch: Simplify the processing of jumping new kernel for KASLR
  kasan: Add (pmd|pud)_init for LoongArch zero_(pud|p4d)_populate process
  kasan: Add __HAVE_ARCH_SHADOW_MAP to support arch specific mapping
  LoongArch: Add KFENCE (Kernel Electric-Fence) support
  LoongArch: Get partial stack information when providing regs parameter
  LoongArch: mm: Add page table mapped mode support for virt_to_page()
  kfence: Defer the assignment of the local variable addr
  LoongArch: Allow building with kcov coverage
  LoongArch: Provide kaslr_offset() to get kernel offset
  LoongArch: Add basic KGDB & KDB support
  LoongArch: Add Loongson Binary Translation (LBT) extension support
  raid6: Add LoongArch SIMD recovery implementation
  raid6: Add LoongArch SIMD syndrome calculation
  LoongArch: Add SIMD-optimized XOR routines
  LoongArch: Allow usage of LSX/LASX in the kernel
  LoongArch: Define symbol 'fault' as a local label in fpu.S
  LoongArch: Adjust {copy, clear}_user exception handler behavior
  LoongArch: Use static defined zero page rather than allocated
  ...

Author: torvalds

Documentation/dev-tools/kasan.rst

@@ -41,8 +41,8 @@ Support
 Architectures
 ~~~~~~~~~~~~~
 
-Generic KASAN is supported on x86_64, arm, arm64, powerpc, riscv, s390, and
-xtensa, and the tag-based KASAN modes are supported only on arm64.
+Generic KASAN is supported on x86_64, arm, arm64, powerpc, riscv, s390, xtensa,
+and loongarch, and the tag-based KASAN modes are supported only on arm64.
 
 Compilers
 ~~~~~~~~~

Documentation/features/debug/KASAN/arch-support.txt

@@ -13,7 +13,7 @@
     |        csky: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
-    |   loongarch: | TODO |
+    |   loongarch: |  ok  |
     |        m68k: | TODO |
     |  microblaze: | TODO |
     |        mips: | TODO |

Documentation/features/debug/kcov/arch-support.txt

@@ -13,7 +13,7 @@
     |        csky: | TODO |
     |     hexagon: | TODO |
     |        ia64: | TODO |
-    |   loongarch: | TODO |
+    |   loongarch: |  ok  |
     |        m68k: | TODO |
     |  microblaze: | TODO |
     |        mips: |  ok  |

Documentation/features/debug/kgdb/arch-support.txt

@@ -13,7 +13,7 @@
     |        csky: | TODO |
     |     hexagon: |  ok  |
     |        ia64: | TODO |
-    |   loongarch: | TODO |
+    |   loongarch: |  ok  |
     |        m68k: | TODO |
     |  microblaze: |  ok  |
     |        mips: |  ok  |

Documentation/translations/zh_CN/dev-tools/kasan.rst

@@ -42,7 +42,7 @@ KASAN有三种模式:
 体系架构
 ~~~~~~~~
 
-在x86_64、arm、arm64、powerpc、riscv、s390和xtensa上支持通用KASAN，
+在x86_64、arm、arm64、powerpc、riscv、s390、xtensa和loongarch上支持通用KASAN，
 而基于标签的KASAN模式只在arm64上支持。
 
 编译器

arch/loongarch/Kconfig

@@ -8,11 +8,13 @@ config LOONGARCH
 	select ACPI_PPTT if ACPI
 	select ACPI_SYSTEM_POWER_STATES_SUPPORT	if ACPI
 	select ARCH_BINFMT_ELF_STATE
+	select ARCH_DISABLE_KASAN_INLINE
 	select ARCH_ENABLE_MEMORY_HOTPLUG
 	select ARCH_ENABLE_MEMORY_HOTREMOVE
 	select ARCH_HAS_ACPI_TABLE_UPGRADE	if ACPI
 	select ARCH_HAS_CPU_FINALIZE_INIT
 	select ARCH_HAS_FORTIFY_SOURCE
+	select ARCH_HAS_KCOV
 	select ARCH_HAS_NMI_SAFE_THIS_CPU_OPS
 	select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE
 	select ARCH_HAS_PTE_SPECIAL
@@ -91,6 +93,9 @@ config LOONGARCH
 	select HAVE_ARCH_AUDITSYSCALL
 	select HAVE_ARCH_JUMP_LABEL
 	select HAVE_ARCH_JUMP_LABEL_RELATIVE
+	select HAVE_ARCH_KASAN
+	select HAVE_ARCH_KFENCE
+	select HAVE_ARCH_KGDB if PERF_EVENTS
 	select HAVE_ARCH_MMAP_RND_BITS if MMU
 	select HAVE_ARCH_SECCOMP_FILTER
 	select HAVE_ARCH_TRACEHOOK
@@ -115,6 +120,7 @@ config LOONGARCH
 	select HAVE_FUNCTION_GRAPH_RETVAL if HAVE_FUNCTION_GRAPH_TRACER
 	select HAVE_FUNCTION_GRAPH_TRACER
 	select HAVE_FUNCTION_TRACER
+	select HAVE_GCC_PLUGINS
 	select HAVE_GENERIC_VDSO
 	select HAVE_HW_BREAKPOINT if PERF_EVENTS
 	select HAVE_IOREMAP_PROT
@@ -254,6 +260,9 @@ config AS_HAS_LSX_EXTENSION
 config AS_HAS_LASX_EXTENSION
 	def_bool $(as-instr,xvld \$xr0$(comma)\$a0$(comma)0)
 
+config AS_HAS_LBT_EXTENSION
+	def_bool $(as-instr,movscr2gr \$a0$(comma)\$scr0)
+
 menu "Kernel type and options"
 
 source "kernel/Kconfig.hz"
@@ -534,6 +543,18 @@ config CPU_HAS_LASX
 
 	  If unsure, say Y.
 
+config CPU_HAS_LBT
+	bool "Support for the Loongson Binary Translation Extension"
+	depends on AS_HAS_LBT_EXTENSION
+	help
+	  Loongson Binary Translation (LBT) introduces 4 scratch registers (SCR0
+	  to SCR3), x86/ARM eflags (eflags) and x87 fpu stack pointer (ftop).
+	  Enabling this option allows the kernel to allocate and switch registers
+	  specific to LBT.
+
+	  If you want to use this feature, such as the Loongson Architecture
+	  Translator (LAT), say Y.
+
 config CPU_HAS_PREFETCH
 	bool
 	default y
@@ -638,6 +659,11 @@ config ARCH_MMAP_RND_BITS_MAX
 config ARCH_SUPPORTS_UPROBES
 	def_bool y
 
+config KASAN_SHADOW_OFFSET
+	hex
+	default 0x0
+	depends on KASAN
+
 menu "Power management options"
 
 config ARCH_SUSPEND_POSSIBLE

arch/loongarch/Makefile

@@ -84,7 +84,10 @@ LDFLAGS_vmlinux			+= -static -pie --no-dynamic-linker -z notext
 endif
 
 cflags-y += $(call cc-option, -mno-check-zero-division)
+
+ifndef CONFIG_KASAN
 cflags-y += -fno-builtin-memcpy -fno-builtin-memmove -fno-builtin-memset
+endif
 
 load-y		= 0x9000000000200000
 bootvars-y	= VMLINUX_LOAD_ADDRESS=$(load-y)

arch/loongarch/configs/loongson3_defconfig

@@ -30,7 +30,6 @@ CONFIG_NAMESPACES=y
 CONFIG_USER_NS=y
 CONFIG_CHECKPOINT_RESTORE=y
 CONFIG_SCHED_AUTOGROUP=y
-CONFIG_SYSFS_DEPRECATED=y
 CONFIG_RELAY=y
 CONFIG_BLK_DEV_INITRD=y
 CONFIG_EXPERT=y
@@ -47,8 +46,12 @@ CONFIG_SMP=y
 CONFIG_HOTPLUG_CPU=y
 CONFIG_NR_CPUS=64
 CONFIG_NUMA=y
+CONFIG_CPU_HAS_FPU=y
+CONFIG_CPU_HAS_LSX=y
+CONFIG_CPU_HAS_LASX=y
 CONFIG_KEXEC=y
 CONFIG_CRASH_DUMP=y
+CONFIG_RANDOMIZE_BASE=y
 CONFIG_SUSPEND=y
 CONFIG_HIBERNATION=y
 CONFIG_ACPI=y
@@ -63,6 +66,7 @@ CONFIG_EFI_ZBOOT=y
 CONFIG_EFI_GENERIC_STUB_INITRD_CMDLINE_LOADER=y
 CONFIG_EFI_CAPSULE_LOADER=m
 CONFIG_EFI_TEST=m
+CONFIG_JUMP_LABEL=y
 CONFIG_MODULES=y
 CONFIG_MODULE_FORCE_LOAD=y
 CONFIG_MODULE_UNLOAD=y
@@ -108,7 +112,12 @@ CONFIG_IP_PNP_BOOTP=y
 CONFIG_IP_PNP_RARP=y
 CONFIG_NET_IPIP=m
 CONFIG_NET_IPGRE_DEMUX=m
+CONFIG_NET_IPGRE=m
+CONFIG_NET_IPGRE_BROADCAST=y
 CONFIG_IP_MROUTE=y
+CONFIG_IP_MROUTE_MULTIPLE_TABLES=y
+CONFIG_IP_PIMSM_V1=y
+CONFIG_IP_PIMSM_V2=y
 CONFIG_INET_ESP=m
 CONFIG_INET_UDP_DIAG=y
 CONFIG_TCP_CONG_ADVANCED=y
@@ -137,7 +146,6 @@ CONFIG_NFT_MASQ=m
 CONFIG_NFT_REDIR=m
 CONFIG_NFT_NAT=m
 CONFIG_NFT_TUNNEL=m
-CONFIG_NFT_OBJREF=m
 CONFIG_NFT_QUEUE=m
 CONFIG_NFT_QUOTA=m
 CONFIG_NFT_REJECT=m
@@ -208,7 +216,11 @@ CONFIG_IP_VS=m
 CONFIG_IP_VS_IPV6=y
 CONFIG_IP_VS_PROTO_TCP=y
 CONFIG_IP_VS_PROTO_UDP=y
+CONFIG_IP_VS_PROTO_ESP=y
+CONFIG_IP_VS_PROTO_AH=y
+CONFIG_IP_VS_PROTO_SCTP=y
 CONFIG_IP_VS_RR=m
+CONFIG_IP_VS_WRR=m
 CONFIG_IP_VS_NFCT=y
 CONFIG_NF_TABLES_IPV4=y
 CONFIG_NFT_DUP_IPV4=m
@@ -227,7 +239,6 @@ CONFIG_IP_NF_TARGET_MASQUERADE=m
 CONFIG_IP_NF_TARGET_NETMAP=m
 CONFIG_IP_NF_TARGET_REDIRECT=m
 CONFIG_IP_NF_MANGLE=m
-CONFIG_IP_NF_TARGET_CLUSTERIP=m
 CONFIG_IP_NF_TARGET_ECN=m
 CONFIG_IP_NF_TARGET_TTL=m
 CONFIG_IP_NF_RAW=m
@@ -363,13 +374,16 @@ CONFIG_MTD_CFI_AMDSTD=m
 CONFIG_MTD_CFI_STAA=m
 CONFIG_MTD_RAM=m
 CONFIG_MTD_ROM=m
+CONFIG_MTD_UBI=m
+CONFIG_MTD_UBI_BLOCK=y
 CONFIG_PARPORT=y
 CONFIG_PARPORT_PC=y
 CONFIG_PARPORT_SERIAL=y
 CONFIG_PARPORT_PC_FIFO=y
 CONFIG_ZRAM=m
 CONFIG_ZRAM_DEF_COMP_ZSTD=y
 CONFIG_BLK_DEV_LOOP=y
+CONFIG_BLK_DEV_DRBD=m
 CONFIG_BLK_DEV_NBD=m
 CONFIG_BLK_DEV_RAM=y
 CONFIG_BLK_DEV_RAM_SIZE=8192
@@ -516,6 +530,8 @@ CONFIG_STMMAC_ETH=y
 # CONFIG_NET_VENDOR_TEHUTI is not set
 # CONFIG_NET_VENDOR_TI is not set
 # CONFIG_NET_VENDOR_VIA is not set
+CONFIG_NGBE=y
+CONFIG_TXGBE=y
 # CONFIG_NET_VENDOR_WIZNET is not set
 # CONFIG_NET_VENDOR_XILINX is not set
 CONFIG_PPP=m
@@ -602,9 +618,15 @@ CONFIG_HW_RANDOM_VIRTIO=m
 CONFIG_I2C_CHARDEV=y
 CONFIG_I2C_PIIX4=y
 CONFIG_I2C_GPIO=y
+CONFIG_I2C_LS2X=y
 CONFIG_SPI=y
+CONFIG_SPI_LOONGSON_PCI=m
+CONFIG_SPI_LOONGSON_PLATFORM=m
+CONFIG_PINCTRL=y
+CONFIG_PINCTRL_LOONGSON2=y
 CONFIG_GPIO_SYSFS=y
 CONFIG_GPIO_LOONGSON=y
+CONFIG_GPIO_LOONGSON_64BIT=y
 CONFIG_POWER_RESET=y
 CONFIG_POWER_RESET_RESTART=y
 CONFIG_POWER_RESET_SYSCON=y
@@ -614,6 +636,7 @@ CONFIG_SENSORS_LM75=m
 CONFIG_SENSORS_LM93=m
 CONFIG_SENSORS_W83795=m
 CONFIG_SENSORS_W83627HF=m
+CONFIG_LOONGSON2_THERMAL=m
 CONFIG_RC_CORE=m
 CONFIG_LIRC=y
 CONFIG_RC_DECODERS=y
@@ -643,6 +666,7 @@ CONFIG_DRM_AMDGPU_USERPTR=y
 CONFIG_DRM_AST=y
 CONFIG_DRM_QXL=m
 CONFIG_DRM_VIRTIO_GPU=m
+CONFIG_DRM_LOONGSON=y
 CONFIG_FB=y
 CONFIG_FB_EFI=y
 CONFIG_FB_RADEON=y
@@ -712,6 +736,7 @@ CONFIG_UCSI_ACPI=m
 CONFIG_INFINIBAND=m
 CONFIG_RTC_CLASS=y
 CONFIG_RTC_DRV_EFI=y
+CONFIG_RTC_DRV_LOONGSON=y
 CONFIG_DMADEVICES=y
 CONFIG_UIO=m
 CONFIG_UIO_PDRV_GENIRQ=m
@@ -745,7 +770,9 @@ CONFIG_COMEDI_NI_LABPC_PCI=m
 CONFIG_COMEDI_NI_PCIDIO=m
 CONFIG_COMEDI_NI_PCIMIO=m
 CONFIG_STAGING=y
-CONFIG_R8188EU=m
+CONFIG_COMMON_CLK_LOONGSON2=y
+CONFIG_LOONGSON2_GUTS=y
+CONFIG_LOONGSON2_PM=y
 CONFIG_PM_DEVFREQ=y
 CONFIG_DEVFREQ_GOV_SIMPLE_ONDEMAND=y
 CONFIG_DEVFREQ_GOV_PERFORMANCE=y
@@ -759,10 +786,17 @@ CONFIG_EXT2_FS_SECURITY=y
 CONFIG_EXT3_FS=y
 CONFIG_EXT3_FS_POSIX_ACL=y
 CONFIG_EXT3_FS_SECURITY=y
+CONFIG_JFS_FS=m
+CONFIG_JFS_POSIX_ACL=y
+CONFIG_JFS_SECURITY=y
 CONFIG_XFS_FS=y
 CONFIG_XFS_QUOTA=y
 CONFIG_XFS_POSIX_ACL=y
+CONFIG_GFS2_FS=m
+CONFIG_GFS2_FS_LOCKING_DLM=y
+CONFIG_OCFS2_FS=m
 CONFIG_BTRFS_FS=y
+CONFIG_BTRFS_FS_POSIX_ACL=y
 CONFIG_FANOTIFY=y
 CONFIG_FANOTIFY_ACCESS_PERMISSIONS=y
 CONFIG_QUOTA=y
@@ -771,11 +805,14 @@ CONFIG_QFMT_V1=m
 CONFIG_QFMT_V2=m
 CONFIG_AUTOFS_FS=y
 CONFIG_FUSE_FS=m
+CONFIG_CUSE=m
+CONFIG_VIRTIO_FS=m
 CONFIG_OVERLAY_FS=y
 CONFIG_OVERLAY_FS_INDEX=y
 CONFIG_OVERLAY_FS_XINO_AUTO=y
 CONFIG_OVERLAY_FS_METACOPY=y
 CONFIG_FSCACHE=y
+CONFIG_CACHEFILES=m
 CONFIG_ISO9660_FS=y
 CONFIG_JOLIET=y
 CONFIG_ZISOFS=y
@@ -784,19 +821,42 @@ CONFIG_MSDOS_FS=m
 CONFIG_VFAT_FS=m
 CONFIG_FAT_DEFAULT_CODEPAGE=936
 CONFIG_FAT_DEFAULT_IOCHARSET="gb2312"
+CONFIG_EXFAT_FS=m
+CONFIG_NTFS3_FS=m
+CONFIG_NTFS3_64BIT_CLUSTER=y
+CONFIG_NTFS3_LZX_XPRESS=y
 CONFIG_PROC_KCORE=y
 CONFIG_TMPFS=y
 CONFIG_TMPFS_POSIX_ACL=y
 CONFIG_HUGETLBFS=y
 CONFIG_CONFIGFS_FS=y
+CONFIG_ORANGEFS_FS=m
+CONFIG_ECRYPT_FS=m
+CONFIG_ECRYPT_FS_MESSAGING=y
 CONFIG_HFS_FS=m
 CONFIG_HFSPLUS_FS=m
+CONFIG_UBIFS_FS=m
+CONFIG_UBIFS_FS_ADVANCED_COMPR=y
 CONFIG_CRAMFS=m
 CONFIG_SQUASHFS=y
 CONFIG_SQUASHFS_XATTR=y
 CONFIG_SQUASHFS_LZ4=y
 CONFIG_SQUASHFS_LZO=y
 CONFIG_SQUASHFS_XZ=y
+CONFIG_MINIX_FS=m
+CONFIG_ROMFS_FS=m
+CONFIG_PSTORE=m
+CONFIG_PSTORE_LZO_COMPRESS=m
+CONFIG_PSTORE_LZ4_COMPRESS=m
+CONFIG_PSTORE_LZ4HC_COMPRESS=m
+CONFIG_PSTORE_842_COMPRESS=y
+CONFIG_PSTORE_ZSTD_COMPRESS=y
+CONFIG_PSTORE_ZSTD_COMPRESS_DEFAULT=y
+CONFIG_SYSV_FS=m
+CONFIG_UFS_FS=m
+CONFIG_EROFS_FS=m
+CONFIG_EROFS_FS_ZIP_LZMA=y
+CONFIG_EROFS_FS_PCPU_KTHREAD=y
 CONFIG_NFS_FS=y
 CONFIG_NFS_V3_ACL=y
 CONFIG_NFS_V4=y
@@ -807,13 +867,18 @@ CONFIG_NFSD=y
 CONFIG_NFSD_V3_ACL=y
 CONFIG_NFSD_V4=y
 CONFIG_NFSD_BLOCKLAYOUT=y
+CONFIG_CEPH_FS=m
+CONFIG_CEPH_FSCACHE=y
+CONFIG_CEPH_FS_POSIX_ACL=y
+CONFIG_CEPH_FS_SECURITY_LABEL=y
 CONFIG_CIFS=m
 # CONFIG_CIFS_DEBUG is not set
 CONFIG_9P_FS=y
 CONFIG_NLS_CODEPAGE_437=y
 CONFIG_NLS_CODEPAGE_936=y
 CONFIG_NLS_ASCII=y
 CONFIG_NLS_UTF8=y
+CONFIG_DLM=m
 CONFIG_KEY_DH_OPERATIONS=y
 CONFIG_SECURITY=y
 CONFIG_SECURITY_SELINUX=y
@@ -847,6 +912,7 @@ CONFIG_CRYPTO_USER_API_HASH=m
 CONFIG_CRYPTO_USER_API_SKCIPHER=m
 CONFIG_CRYPTO_USER_API_RNG=m
 CONFIG_CRYPTO_USER_API_AEAD=m
+CONFIG_CRYPTO_CRC32_LOONGARCH=m
 CONFIG_CRYPTO_DEV_VIRTIO=m
 CONFIG_PRINTK_TIME=y
 CONFIG_STRIP_ASM_SYMS=y

arch/loongarch/include/asm/asm-prototypes.h

@@ -1,6 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0 */
 #include <linux/uaccess.h>
 #include <asm/fpu.h>
+#include <asm/lbt.h>
 #include <asm/mmu_context.h>
 #include <asm/page.h>
 #include <asm/ftrace.h>