Add RVV support to Cheshire

.gitmodules

@@ -8,7 +8,7 @@
 	branch = master
 [submodule "buildroot"]
 	path = buildroot
-	url = git://git.buildroot.net/buildroot
+	url = https://github.com/buildroot/buildroot.git
 [submodule "vitetris"]
 	path = vitetris
 	url = https://github.com/pulp-platform/vitetris.git

Makefile

@@ -1,6 +1,7 @@
 # Makefile for RISC-V toolchain; run 'make help' for usage. set XLEN here to 32 or 64.
 
 XLEN     := 64
+RVV      ?= 0
 ROOT     := $(patsubst %/,%, $(dir $(abspath $(lastword $(MAKEFILE_LIST)))))
 RISCV    := $(ROOT)/install$(XLEN)
 DEST     := $(abspath $(RISCV))
@@ -21,7 +22,7 @@ sbi-mk = PLATFORM=$(PLATFORM) CROSS_COMPILE=$(TOOLCHAIN_PREFIX) $(if $(FW_FDT_PA
 ifeq ($(XLEN), 32)
 sbi-mk += PLATFORM_RISCV_ISA=rv32ima PLATFORM_RISCV_XLEN=32
 else
-sbi-mk += PLATFORM_RISCV_ISA=rv64imafdc PLATFORM_RISCV_XLEN=64
+sbi-mk += PLATFORM_RISCV_ISA=rv64imafdc_zifencei PLATFORM_RISCV_XLEN=64
 endif
 
 # U-Boot options
@@ -49,14 +50,19 @@ tests-mk         		= -j$(NR_CORES)
 buildroot-mk       		= -j$(NR_CORES)
 
 # linux image
-buildroot_defconfig = configs/buildroot$(XLEN)_defconfig
-linux_defconfig = configs/linux$(XLEN)_defconfig
+ifeq ($(RVV), 1)
+	buildroot_defconfig = configs/buildroot$(XLEN)_V_defconfig
+	linux_defconfig = configs/linux$(XLEN)_V_defconfig
+else
+	buildroot_defconfig = configs/buildroot$(XLEN)_defconfig
+	linux_defconfig = configs/linux$(XLEN)_defconfig
+endif
 busybox_defconfig = configs/busybox$(XLEN).config
 
 install-dir:
 	mkdir -p $(RISCV)
 
-isa-sim: install-dir $(CC) 
+isa-sim: install-dir $(CC)
 	mkdir -p riscv-isa-sim/build
 	cd riscv-isa-sim/build;\
 	../configure $(isa-sim-co);\
@@ -85,9 +91,15 @@ rootfs/cachetest.elf: $(CC)
 	cp ./cachetest/cachetest.elf $@
 
 # cool command-line tetris
+ifneq ($(RVV), 1)
 rootfs/tetris: $(CC)
 	cd ./vitetris/ && make clean && ./configure CC=$(CC) && make
 	cp ./vitetris/tetris $@
+else
+rootfs/tetris: $(CC)
+	touch rootfs/tetris
+endif
+
 
 $(RISCV)/vmlinux: $(buildroot_defconfig) $(linux_defconfig) $(busybox_defconfig) $(CC) rootfs/cachetest.elf rootfs/tetris
 	mkdir -p $(RISCV)

configs/buildroot64_V_defconfig

@@ -0,0 +1,42 @@
+BR2_riscv=y
+BR2_riscv_custom=y
+BR2_RISCV_64=y
+BR2_RISCV_ISA_CUSTOM_RVM=y
+BR2_RISCV_ISA_CUSTOM_RVF=y
+BR2_RISCV_ISA_CUSTOM_RVD=y
+BR2_RISCV_ISA_CUSTOM_RVC=y
+BR2_RISCV_ISA_CUSTOM_RVA=y
+BR2_RISCV_ISA_CUSTOM_RVV=y
+BR2_CCACHE=y
+BR2_TOOLCHAIN_BUILDROOT_GLIBC=y
+BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_6_4=y
+BR2_ROOTFS_OVERLAY="../rootfs"
+BR2_LINUX_KERNEL=y
+BR2_LINUX_KERNEL_CUSTOM_GIT=y
+BR2_LINUX_KERNEL_CUSTOM_REPO_URL="https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
+BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION="v6.5"
+#BR2_LINUX_KERNEL_PATCH="../linux_patch/"
+BR2_LINUX_KERNEL_VERSION="v6.5"
+BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y
+BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="../configs/linux64_V_defconfig"
+BR2_LINUX_KERNEL_VMLINUX=y
+BR2_PACKAGE_BUSYBOX_CONFIG="../configs/busybox64.config"
+BR2_PACKAGE_ALSA_UTILS=y
+BR2_PACKAGE_ALSA_UTILS_APLAY=y
+BR2_PACKAGE_MPG123=y
+BR2_PACKAGE_DHRYSTONE=y
+BR2_PACKAGE_MEMSTAT=y
+BR2_PACKAGE_RAMSPEED=y
+BR2_PACKAGE_NFS_UTILS=y
+BR2_PACKAGE_LIBNFS=y
+BR2_PACKAGE_ETHTOOL=y
+# BR2_PACKAGE_IFUPDOWN_SCRIPTS is not set
+BR2_PACKAGE_IPERF3=y
+BR2_PACKAGE_IPROUTE2=y
+BR2_PACKAGE_TCPDUMP=y
+BR2_TARGET_ROOTFS_CPIO_GZIP=y
+BR2_TARGET_ROOTFS_INITRAMFS=y
+# BR2_TARGET_ROOTFS_TAR is not set
+BR2_GCC_VERSION_13_X=y
+BR2_GCC_VERSION="13.2.0"
+BR2_TOOLCHAIN_BUILDROOT_CXX=y

configs/linux64_V_defconfig

@@ -0,0 +1,83 @@
+CONFIG_DEFAULT_HOSTNAME="cheshire-fpga"
+# CONFIG_CROSS_MEMORY_ATTACH is not set
+CONFIG_NAMESPACES=y
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_INITRAMFS_SOURCE="${BR_BINARIES_DIR}/rootfs.cpio"
+CONFIG_EMBEDDED=y
+CONFIG_SMP=y
+CONFIG_HZ_100=y
+CONFIG_CMDLINE="earlyprintk debug loglevel=7"
+CONFIG_MODULES=y
+# CONFIG_BLK_DEV_BSG is not set
+CONFIG_PARTITION_ADVANCED=y
+# CONFIG_COMPACTION is not set
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_INET=y
+#CONFIG_UEVENT_HELPER=y
+#CONFIG_UEVENT_HELPER_PATH="/sbin/mdev"
+CONFIG_DEVTMPFS=y
+CONFIG_DEVTMPFS_MOUNT=y
+CONFIG_VIRTIO_BLK=y
+CONFIG_EEPROM_AT24=y
+CONFIG_SCSI=m
+CONFIG_BLK_DEV_SD=m
+CONFIG_BLK_DEV_SR=m
+CONFIG_CHR_DEV_SG=m
+CONFIG_NETDEVICES=y
+# CONFIG_ETHERNET is not set
+CONFIG_USB_USBNET=m
+# CONFIG_USB_NET_AX88179_178A is not set
+CONFIG_INPUT_EVDEV=m
+# CONFIG_INPUT_MOUSE is not set
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_SERIAL_OF_PLATFORM=y
+CONFIG_SERIAL_UARTLITE=y
+CONFIG_HVC_RISCV_SBI=y
+CONFIG_VIRTIO_CONSOLE=y
+# CONFIG_HW_RANDOM is not set
+CONFIG_I2C=y
+CONFIG_I2C_OCORES=y
+CONFIG_SPI=y
+CONFIG_SPI_DEBUG=y
+CONFIG_POWER_RESET=y
+CONFIG_FB=y
+CONFIG_FB_SIMPLE=y
+CONFIG_FRAMEBUFFER_CONSOLE=y
+CONFIG_SOUND=y
+CONFIG_SND=y
+CONFIG_SND_USB_AUDIO=m
+CONFIG_HIDRAW=y
+CONFIG_UHID=m
+CONFIG_HID_ALPS=m
+CONFIG_USB=y
+CONFIG_USB_ANNOUNCE_NEW_DEVICES=y
+CONFIG_USB_OHCI_HCD=y
+CONFIG_USB_OHCI_HCD_PLATFORM=y
+CONFIG_USB_STORAGE=m
+CONFIG_MMC=y
+CONFIG_MMC_DEBUG=y
+CONFIG_MMC_SPI=y
+CONFIG_VIRTIO_MMIO=y
+# CONFIG_IOMMU_SUPPORT is not set
+CONFIG_PWM=y
+CONFIG_SIFIVE_PLIC=y
+CONFIG_EXT3_FS=y
+CONFIG_EXT4_DEBUG=y
+CONFIG_MSDOS_FS=m
+CONFIG_VFAT_FS=m
+# CONFIG_PROC_PAGE_MONITOR is not set
+CONFIG_TMPFS=y
+# CONFIG_MISC_FILESYSTEMS is not set
+CONFIG_CRYPTO_ECHAINIV=y
+# CONFIG_CRYPTO_HW is not set
+CONFIG_PRINTK_TIME=y
+CONFIG_STRIP_ASM_SYMS=y
+CONFIG_DEBUG_SECTION_MISMATCH=y
+CONFIG_DEBUG_FS=y
+CONFIG_STACKTRACE=y
+# Enable/disable RVV
+CONFIG_RISCV_ISA_V=y
+# Enable userspace Vector by default
+RISCV_ISA_V_DEFAULT_ENABLE=y