WIP: add loongarch support

meta/classes-recipe/kernel-arch.bbclass

@@ -19,6 +19,7 @@ valid_archs = "alpha cris ia64 \
                sh sh64 um h8300   \
                parisc s390  v850 \
                avr32 blackfin \
+               loongarch64 \
                microblaze \
                nios2 arc riscv xtensa"
 
@@ -34,6 +35,7 @@ def map_kernel_arch(a, d):
     elif re.match('aarch64_be$', a):            return 'arm64'
     elif re.match('aarch64_ilp32$', a):         return 'arm64'
     elif re.match('aarch64_be_ilp32$', a):      return 'arm64'
+    elif re.match('loongarch(32|64|)$', a):     return 'loongarch'
     elif re.match('mips(isa|)(32|64|)(r6|)(el|)$', a):      return 'mips'
     elif re.match('mcf', a):                    return 'm68k'
     elif re.match('riscv(32|64|)(eb|)$', a):    return 'riscv'

meta/classes-recipe/siteinfo.bbclass

@@ -39,6 +39,8 @@ def siteinfo_data_for_machine(arch, os, d):
         "i686": "endian-little bit-32 ix86-common",
         "ia64": "endian-little bit-64",
         "lm32": "endian-big bit-32",
+        "loongarch32": "endian-little bit-32 loongarch",
+        "loongarch64": "endian-little bit-64 loongarch",
         "m68k": "endian-big bit-32",
         "microblaze": "endian-big bit-32 microblaze-common",
         "microblazeel": "endian-little bit-32 microblaze-common",
@@ -97,6 +99,8 @@ def siteinfo_data_for_machine(arch, os, d):
         "arm-linux-musleabi": "arm-linux",
         "armeb-linux-gnueabi": "armeb-linux",
         "armeb-linux-musleabi": "armeb-linux",
+        "loongarch32-linux": "loongarch32-linux",
+        "loongarch64-linux": "loongarch64-linux",
         "microblazeel-linux" : "microblaze-linux",
         "microblazeel-linux-musl" : "microblaze-linux",
         "mips-linux-musl": "mips-linux",

meta/conf/distro/include/default-distrovars.inc

@@ -22,6 +22,9 @@ DISTRO_FEATURES_DEFAULT:remove:arc = "seccomp"
 # seccomp is not yet ported to microblaze
 DISTRO_FEATURES_DEFAULT:remove:microblaze = "seccomp"
 
+# seccomp is not yet ported to loongarch64
+DISTRO_FEATURES_DEFAULT:remove:loongarch64 = "seccomp"
+
 DISTRO_FEATURES_DEFAULT ?= "acl alsa bluetooth debuginfod ext2 ipv4 ipv6 pcmcia usbgadget usbhost wifi xattr nfs zeroconf pci 3g nfc x11 vfat seccomp"
 DISTRO_FEATURES ?= "${DISTRO_FEATURES_DEFAULT}"
 IMAGE_FEATURES ?= ""

meta/conf/machine-sdk/loongarch64.conf

@@ -0,0 +1,2 @@
+SDK_ARCH = "loongarch64"
+ABIEXTENSION:class-nativesdk = ""

meta/conf/machine/include/loongarch/arch-loongarch.inc

@@ -0,0 +1,7 @@
+# LoongArch Architecture definition
+
+DEFAULTTUNE ?= "loongarch64"
+
+TUNE_ARCH = "${TUNE_ARCH:tune-${DEFAULTTUNE}}"
+TUNE_PKGARCH = "${TUNE_PKGARCH:tune-${DEFAULTTUNE}}"
+TUNE_CCARGS:append = "${@bb.utils.contains('TUNE_FEATURES', 'loongarch64', ' -march=la464 -mabi=lp64d', ' ', d)}"

meta/conf/machine/include/loongarch/qemuloongarch.inc

@@ -0,0 +1,35 @@
+PREFERRED_PROVIDER_virtual/bootloader ?= "u-boot"
+
+require conf/machine/include/qemu.inc
+require conf/machine/include/loongarch/tune-loongarch.inc
+
+MACHINE_FEATURES = "screen keyboard ext2 ext3 serial"
+
+KERNEL_IMAGETYPE = "vmlinuz"
+KERNEL_IMAGETYPES += "vmlinuz"
+KEEPUIMAGE = "no"
+
+SERIAL_CONSOLES ?= "115200;ttyS0 115200;hvc0"
+
+IMAGE_FSTYPES += "ext4 wic.qcow2"
+
+WKS_FILE ?= "qemuloongarch.wks"
+
+MACHINE_EXTRA_RRECOMMENDS += " kernel-modules"
+
+#EXTRA_IMAGEDEPENDS += "opensbi"
+
+UBOOT_ENTRYPOINT_loongarch32 = "0x80400000"
+UBOOT_ENTRYPOINT_loongarch64 = "0x80200000"
+
+# qemuboot options
+QB_KERNEL_CMDLINE_APPEND = "earlycon=sbi"
+QB_MACHINE = "-machine virt"
+QB_DEFAULT_BIOS = "fw_jump.elf"
+QB_TAP_OPT = "-netdev tap,id=net0,ifname=@TAP@,script=no,downscript=no"
+QB_NETWORK_DEVICE = "-device virtio-net-device,netdev=net0,mac=@MAC@"
+QB_ROOTFS_OPT = "-drive id=disk0,file=@ROOTFS@,if=none,format=raw -device virtio-blk-device,drive=disk0"
+QB_SERIAL_OPT = "-device virtio-serial-device -chardev null,id=virtcon -device virtconsole,chardev=virtcon"
+QB_TCPSERIAL_OPT = " -device virtio-serial-device -chardev socket,id=virtcon,port=@PORT@,host=127.0.0.1 -device virtconsole,chardev=virtcon"
+# Add the 'virtio-rng-pci' device otherwise the guest may run out of entropy
+QB_OPT_APPEND = " -object rng-random,filename=/dev/urandom,id=rng0 -device virtio-rng-device,rng=rng0"

meta/conf/machine/include/loongarch/tune-loongarch.inc

@@ -0,0 +1,13 @@
+require conf/machine/include/loongarch/arch-loongarch.inc
+
+TUNEVALID[loongarch64] = "Enable 64-bit LoongArch optimizations"
+
+TUNEVALID[littleendian] = "Little endian mode"
+
+AVAILTUNES += "loongarch64"
+
+# Default
+TUNE_FEATURES:tune-loongarch64 = "loongarch64"
+TUNE_ARCH:tune-loongarch64 = "loongarch64"
+TUNE_PKGARCH:tune-loongarch64 = "loongarch64"
+PACKAGE_EXTRA_ARCHS:tune-loongarch64 = "loongarch64"

meta/conf/machine/qemuloongarch64.conf

@@ -0,0 +1,11 @@
+#@TYPE: Machine
+#@NAME: generic loongarch64 machine
+#@DESCRIPTION: Machine configuration for running a generic loongarch64
+
+require conf/machine/include/loongarch/qemuloongarch.inc
+
+XVISOR_PLAT = "loongarch/virt64"
+
+EXTRA_IMAGEDEPENDS += "u-boot"
+UBOOT_MACHINE = "qemu-loongarch64_smode_defconfig"
+UBOOT_ELF = "u-boot"

meta/conf/templates/default/local.conf.sample

@@ -21,6 +21,7 @@
 #
 #MACHINE ?= "qemuarm"
 #MACHINE ?= "qemuarm64"
+#MACHINE ?= "qemuloongarch64"
 #MACHINE ?= "qemumips"
 #MACHINE ?= "qemumips64"
 #MACHINE ?= "qemuppc"

meta/lib/oe/elf.py

@@ -21,6 +21,7 @@ def machine_dict(d):
                         "x86_64":     (62,     0,    0,          True,          64),
                         "epiphany":   (4643,   0,    0,          True,          32),
                         "lm32":       (138,    0,    0,          False,         32),
+                        "loongarch64":(258,    0,    0,          True,          64),
                         "mips":       ( 8,     0,    0,          False,         32),
                         "mipsel":     ( 8,     0,    0,          True,          32),
                         "microblaze":  (189,   0,    0,          False,         32),
@@ -45,6 +46,7 @@ def machine_dict(d):
                         "ia64":       (50,     0,    0,          True,          64),
                         "alpha":      (36902,  0,    0,          True,          64),
                         "hppa":       (15,     3,    0,          False,         32),
+                        "loongarch64":(258,    0,    0,          True,          64),
                         "m68k":       ( 4,     0,    0,          False,         32),
                         "mips":       ( 8,     0,    0,          False,         32),
                         "mipsel":     ( 8,     0,    0,          True,          32),

meta/recipes-bsp/u-boot/u-boot-tools.inc

@@ -24,6 +24,7 @@ SED_CONFIG_EFI:x86-64 = ''
 SED_CONFIG_EFI:arm = ''
 SED_CONFIG_EFI:armeb = ''
 SED_CONFIG_EFI:aarch64 = ''
+SED_CONFIG_EFI:loongarch64 = ''
 
 do_compile () {
 	# Yes, this is crazy. If you build on a system with git < 2.14 from scratch, the tree will

meta/recipes-devtools/binutils/binutils.inc

@@ -57,6 +57,7 @@ GPROFNG_ALTS:aarch64 = "${GPROFNGS}"
 LDGOLD_ALTS ?= "ld.gold dwp"
 LDGOLD_ALTS:riscv64 = ""
 LDGOLD_ALTS:riscv32 = ""
+LDGOLD_ALTS:loongarch64 = ""
 LDGOLD_ALTS:libc-glibc:mipsarch = ""
 
 USE_ALTERNATIVES_FOR = " \
@@ -198,6 +199,6 @@ ALTERNATIVE_PRIORITY = "100"
 ALTERNATIVE:${PN}:class-target = "${USE_ALTERNATIVES_FOR}"
 
 python () {
-    if bb.utils.contains('DISTRO_FEATURES', 'ld-is-gold', True, False, d) and bb.utils.contains_any('TARGET_ARCH', 'riscv32 riscv64', True, False, d):
-        bb.fatal("Gold linker does not _yet_ support RISC-V architecture please remove ld-is-gold from DISTRO_FEATURES")
+    if bb.utils.contains('DISTRO_FEATURES', 'ld-is-gold', True, False, d) and bb.utils.contains_any('TARGET_ARCH', 'riscv32 riscv64 loongarch64', True, False, d):
+        bb.fatal("Gold linker does not _yet_ support RISC-V and LoongArch architecture please remove ld-is-gold from DISTRO_FEATURES")
 }

meta/recipes-devtools/meson/meson_1.0.0.bb

@@ -66,6 +66,8 @@ def generate_native_link_template(d):
         loader = 'ld-linux-aarch64.so.1'
     elif 'ppc64le' in build_arch:
         loader = 'ld64.so.2'
+    elif 'loongarch64' in build_arch:
+        loader = 'ld-linux-loongarch-lp64d.so.1'
 
     if loader:
         val += ['-Wl,--dynamic-linker=@{OECORE_NATIVE_SYSROOT}${base_libdir_native}/' + loader]

meta/recipes-devtools/qemu/qemu.inc

@@ -86,7 +86,7 @@ do_install_ptest() {
 }
 
 # QEMU_TARGETS is overridable variable
-QEMU_TARGETS ?= "arm aarch64 i386 mips mipsel mips64 mips64el ppc ppc64 ppc64le riscv32 riscv64 sh4 x86_64"
+QEMU_TARGETS ?= "arm aarch64 i386 loongarch64 mips mipsel mips64 mips64el ppc ppc64 ppc64le riscv32 riscv64 sh4 x86_64"
 
 EXTRA_OECONF = " \
     --prefix=${prefix} \

meta/recipes-kernel/linux/linux-yocto-dev.bb

@@ -50,7 +50,7 @@ PACKAGECONFIG[dt-validation] = ",,python3-dtschema-native"
 # we need the wrappers if validation isn't in the packageconfig
 DEPENDS += "${@bb.utils.contains('PACKAGECONFIG', 'dt-validation', '', 'python3-dtschema-wrapper-native', d)}"
 
-COMPATIBLE_MACHINE = "^(qemuarmv5|qemuarm|qemuarm64|qemux86|qemuppc|qemumips|qemumips64|qemux86-64|qemuriscv32|qemuriscv64)$"
+COMPATIBLE_MACHINE = "^(qemuarmv5|qemuarm|qemuarm64|qemux86|qemuppc|qemumips|qemumips64|qemux86-64|qemuriscv32|qemuriscv64|qemuloongarch64)$"
 
 KERNEL_DEVICETREE:qemuarmv5 = "versatile-pb.dtb"
 

meta/recipes-kernel/linux/linux-yocto_6.1.bb

@@ -11,10 +11,12 @@ KBRANCH:qemuriscv64  ?= "v6.1/standard/base"
 KBRANCH:qemuriscv32  ?= "v6.1/standard/base"
 KBRANCH:qemux86  ?= "v6.1/standard/base"
 KBRANCH:qemux86-64 ?= "v6.1/standard/base"
+KBRANCH:qemuloongarch64  ?= "v6.1/standard/base"
 KBRANCH:qemumips64 ?= "v6.1/standard/mti-malta64"
 
 SRCREV_machine:qemuarm ?= "45f7cca5081d3cb4ad4fae8e158cd58ea4db6c1f"
 SRCREV_machine:qemuarm64 ?= "404168c1ce77179a34bb9959a18b594a9f7105d3"
+SRCREV_machine:qemuloongarch64 ?= "404168c1ce77179a34bb9959a18b594a9f7105d3"
 SRCREV_machine:qemumips ?= "eb204027dbb98317d002250cc594de30ecc62b90"
 SRCREV_machine:qemuppc ?= "404168c1ce77179a34bb9959a18b594a9f7105d3"
 SRCREV_machine:qemuriscv64 ?= "404168c1ce77179a34bb9959a18b594a9f7105d3"
@@ -51,7 +53,7 @@ KCONF_BSP_AUDIT_LEVEL = "1"
 
 KERNEL_DEVICETREE:qemuarmv5 = "versatile-pb.dtb"
 
-COMPATIBLE_MACHINE = "^(qemuarm|qemuarmv5|qemuarm64|qemux86|qemuppc|qemuppc64|qemumips|qemumips64|qemux86-64|qemuriscv64|qemuriscv32)$"
+COMPATIBLE_MACHINE = "^(qemuarm|qemuarmv5|qemuarm64|qemux86|qemuppc|qemuppc64|qemumips|qemumips64|qemux86-64|qemuriscv64|qemuriscv32|qemuloongarch64)$"
 
 # Functionality flags
 KERNEL_EXTRA_FEATURES ?= "features/netfilter/netfilter.scc"

meta/site/loongarch64-linux

@@ -0,0 +1,11 @@
+# general
+ac_cv_alignof_guint32=4
+ac_cv_alignof_guint64=8
+ac_cv_alignof_unsigned_long=8
+
+# glib-2.0
+glib_cv_stack_grows=${glib_cv_stack_grows=no}
+glib_cv_uscore=${glib_cv_uscore=no}
+
+# startup-notification
+lf_cv_sane_realloc=${lf_cv_sane_realloc=yes}

scripts/lib/wic/canned-wks/qemuloongarch.wks

@@ -0,0 +1,3 @@
+# short-description: Create qcow2 image for LoongArch QEMU machines
+
+part / --source rootfs --fstype=ext4 --label root --align 4096 --size 5G

scripts/runqemu

@@ -1313,7 +1313,7 @@ class BaseConfig(object):
         """attempt to determine the appropriate qemu-system binary"""
         mach = self.get('MACHINE')
         if not mach:
-            search = '.*(qemux86-64|qemux86|qemuarm64|qemuarm|qemumips64|qemumips64el|qemumipsel|qemumips|qemuppc).*'
+            search = '.*(qemux86-64|qemux86|qemuarm64|qemuarm|qemuloongarch64|qemumips64|qemumips64el|qemumipsel|qemumips|qemuppc).*'
             if self.rootfs:
                 match = re.match(search, self.rootfs)
                 if match:
@@ -1336,6 +1336,8 @@ class BaseConfig(object):
             qbsys = 'x86_64'
         elif mach == 'qemuppc':
             qbsys = 'ppc'
+        elif mach == 'qemuloongarch64':
+            qbsys = 'loongarch64'
         elif mach == 'qemumips':
             qbsys = 'mips'
         elif mach == 'qemumips64':