boards/risc-v: Add lvgl64_vector configuration for RISC-V QEMU

Add new RISC-V 64-bit QEMU configuration with:
- 64-bit RISC-V (RV64) architecture support
- RISC-V Vector Extension (RVV/V-extension) enabled
- LVGL graphics framework integration
- VirtIO GPU and input device support
- NSH shell with built-in applications

This configuration enables developers to build and test LVGL graphical
applications on 64-bit RISC-V targets with Vector extension support,
providing a foundation for future SIMD optimization work.

Includes:
- defconfig: Complete configuration file with all necessary options
- Updated index.rst: Build and run instructions with QEMU launch command

Signed-off-by: rongyichang <rongyichang@xiaomi.com>

Documentation/platforms/risc-v/qemu-rv/boards/rv-virt/index.rst

@@ -143,6 +143,44 @@ To run it with QEMU, use the following command::
       -mon chardev=con,mode=readline \
       -bios none -kernel nuttx
 
+lvgl64_vector
+-------------
+
+This configuration uses the LVGL graphics framework with RISC-V 64-bit support
+and Vector Extension (V-extension) enabled. It allows developers to create
+graphical applications with LVGL on RISC-V QEMU while leveraging the Vector
+extension for potential SIMD optimization.
+
+Features:
+
+- 64-bit RISC-V architecture (RV64)
+- RISC-V Vector Extension (RVV/V-extension) support
+- LVGL graphics framework with 32-bit color depth
+- VirtIO GPU device for framebuffer access
+- NSH shell with built-in applications
+
+To build it::
+
+    $ ./tools/configure.sh rv-virt:lvgl64_vector
+    $ make -j$(nproc)
+
+To run it with QEMU with graphics output::
+
+    $ qemu-system-riscv64 -semihosting -M virt,aclint=on -cpu rv64,v=true -smp 1 \
+      -chardev stdio,id=con,mux=on \
+      -serial chardev:con \
+      -device virtio-gpu-device,xres=640,yres=480,bus=virtio-mmio-bus.0 \
+      -device virtio-mouse-device,bus=virtio-mmio-bus.1 \
+      -mon chardev=con,mode=readline \
+      -bios none -kernel nuttx
+
+After booting into the NSH shell, you can run the LVGL demo with::
+
+    nsh> lvgldemo
+
+This configuration is suitable for developing and testing LVGL applications
+on 64-bit RISC-V targets with Vector extension support.
+
 knetnsh64
 ---------
 

boards/risc-v/qemu-rv/rv-virt/configs/lvgl64_vector/defconfig

@@ -0,0 +1,106 @@
+#
+# This file is autogenerated: PLEASE DO NOT EDIT IT.
+#
+# You can use "make menuconfig" to make any modifications to the installed .config file.
+# You can then do "make savedefconfig" to generate a new defconfig file that includes your
+# modifications.
+#
+# CONFIG_LV_BUILD_EXAMPLES is not set
+CONFIG_16550_ADDRWIDTH=0
+CONFIG_16550_UART0=y
+CONFIG_16550_UART0_BASE=0x10000000
+CONFIG_16550_UART0_CLOCK=3686400
+CONFIG_16550_UART0_IRQ=37
+CONFIG_16550_UART0_SERIAL_CONSOLE=y
+CONFIG_16550_UART=y
+CONFIG_ALLOW_BSD_COMPONENTS=y
+CONFIG_ARCH="risc-v"
+CONFIG_ARCH_BOARD="rv-virt"
+CONFIG_ARCH_BOARD_QEMU_RV_VIRT=y
+CONFIG_ARCH_CHIP="qemu-rv"
+CONFIG_ARCH_CHIP_QEMU_RV64=y
+CONFIG_ARCH_CHIP_QEMU_RV=y
+CONFIG_ARCH_CHIP_QEMU_RV_ISA_A=y
+CONFIG_ARCH_CHIP_QEMU_RV_ISA_C=y
+CONFIG_ARCH_CHIP_QEMU_RV_ISA_M=y
+CONFIG_ARCH_CHIP_QEMU_RV_ISA_V=y
+CONFIG_ARCH_FLOAT_H=y
+CONFIG_ARCH_INTERRUPTSTACK=2048
+CONFIG_ARCH_RISCV=y
+CONFIG_ARCH_STACKDUMP=y
+CONFIG_BOARD_LOOPSPERMSEC=6366
+CONFIG_BUILTIN=y
+CONFIG_DEBUG_FULLOPT=y
+CONFIG_DEBUG_SYMBOLS=y
+CONFIG_DEV_SIMPLE_ADDRENV=y
+CONFIG_DRIVERS_VIDEO=y
+CONFIG_DRIVERS_VIRTIO=y
+CONFIG_DRIVERS_VIRTIO_GPU=y
+CONFIG_DRIVERS_VIRTIO_MMIO=y
+CONFIG_DRIVERS_VIRTIO_SERIAL=y
+CONFIG_ELF=y
+CONFIG_EXAMPLES_FB=y
+CONFIG_EXAMPLES_HELLO=m
+CONFIG_EXAMPLES_LVGLDEMO=y
+CONFIG_EXAMPLES_LVGLDEMO_STACKSIZE=32768
+CONFIG_FAT_LCNAMES=y
+CONFIG_FAT_LFN=y
+CONFIG_FS_FAT=y
+CONFIG_FS_FATTIME=y
+CONFIG_FS_HOSTFS=y
+CONFIG_FS_LARGEFILE=y
+CONFIG_FS_PROCFS=y
+CONFIG_GRAPHICS_LVGL=y
+CONFIG_IDLETHREAD_STACKSIZE=2048
+CONFIG_INIT_ENTRYPOINT="nsh_main"
+CONFIG_INIT_STACKSIZE=4096
+CONFIG_INPUT=y
+CONFIG_INTELHEX_BINARY=y
+CONFIG_IOB_BUFSIZE=1534
+CONFIG_IOB_NBUFFERS=24
+CONFIG_IOB_NCHAINS=24
+CONFIG_IOB_THROTTLE=2
+CONFIG_LIBC_ENVPATH=y
+CONFIG_LIBC_EXECFUNCS=y
+CONFIG_LIBC_PERROR_STDOUT=y
+CONFIG_LIBC_STRERROR=y
+CONFIG_LV_COLOR_DEPTH_32=y
+CONFIG_LV_USE_CLIB_MALLOC=y
+CONFIG_LV_USE_CLIB_SPRINTF=y
+CONFIG_LV_USE_CLIB_STRING=y
+CONFIG_LV_USE_DEMO_WIDGETS=y
+CONFIG_LV_USE_LOG=y
+CONFIG_LV_USE_NUTTX=y
+CONFIG_LV_USE_NUTTX_TOUCHSCREEN=y
+CONFIG_MM_IOB=y
+CONFIG_MQ_MAXMSGSIZE=64
+CONFIG_NSH_ARCHINIT=y
+CONFIG_NSH_BUILTIN_APPS=y
+CONFIG_NSH_FILEIOSIZE=512
+CONFIG_NSH_FILE_APPS=y
+CONFIG_NSH_READLINE=y
+CONFIG_NSH_SYMTAB=y
+CONFIG_NSH_SYMTAB_ARRAYNAME="g_symtab"
+CONFIG_NSH_SYMTAB_COUNTNAME="g_nsymbols"
+CONFIG_PATH_INITIAL="/system/bin"
+CONFIG_RAM_SIZE=33554432
+CONFIG_RAM_START=0x80000000
+CONFIG_READLINE_CMD_HISTORY=y
+CONFIG_RISCV_SEMIHOSTING_HOSTFS=y
+CONFIG_RR_INTERVAL=200
+CONFIG_SCHED_HAVE_PARENT=y
+CONFIG_SCHED_HPWORK=y
+CONFIG_SCHED_LPWORK=y
+CONFIG_SCHED_WAITPID=y
+CONFIG_SERIAL_UART_ARCH_MMIO=y
+CONFIG_STACK_COLORATION=y
+CONFIG_START_DAY=17
+CONFIG_START_MONTH=12
+CONFIG_START_YEAR=2025
+CONFIG_SYMTAB_ORDEREDBYNAME=y
+CONFIG_SYSLOG_TIMESTAMP=y
+CONFIG_SYSTEM_NSH=y
+CONFIG_SYSTEM_NSH_STACKSIZE=3072
+CONFIG_TESTING_GETPRIME=y
+CONFIG_TESTING_OSTEST=y
+CONFIG_VIDEO_FB=y