initial buildroot for linux 5.15

board/qemu/aarch64-sbsa/assemble-flash-images

@@ -0,0 +1,11 @@
+#!/bin/bash
+
+set -e
+
+BOARD_DIR="$(dirname $0)"
+
+cp -f ${BOARD_DIR}/grub.cfg ${BINARIES_DIR}/efi-part/EFI/BOOT/grub.cfg
+
+# The QEMU sbsa machine expects flash devices to be 256M.
+truncate -s 256M ${BINARIES_DIR}/SBSA_FLASH0.fd
+truncate -s 256M ${BINARIES_DIR}/SBSA_FLASH1.fd

board/qemu/aarch64-sbsa/genimage.cfg

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+image efi-part.vfat {
+	vfat {
+		file EFI {
+			image = "efi-part/EFI"
+		}
+
+		file Image {
+			image = "Image"
+		}
+	}
+
+	size = 64M
+}
+
+image disk.img {
+	hdimage {
+		gpt = true
+	}
+
+	partition boot {
+		partition-type = 0xEF
+		image = "efi-part.vfat"
+	}
+
+	partition root {
+		partition-type = 0x83
+		image = "rootfs.ext2"
+	}
+}

board/qemu/aarch64-sbsa/grub.cfg

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+set default="0"
+set timeout="5"
+
+menuentry "Buildroot" {
+	linux /Image root=/dev/sda2 rootwait console=ttyAMA0
+}

board/qemu/aarch64-sbsa/linux.config

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+CONFIG_SYSVIPC=y
+CONFIG_POSIX_MQUEUE=y
+CONFIG_NO_HZ_IDLE=y
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_TASKSTATS=y
+CONFIG_SCHED_AUTOGROUP=y
+CONFIG_PROFILING=y
+CONFIG_ARCH_VEXPRESS=y
+CONFIG_COMPAT=y
+CONFIG_FW_CFG_SYSFS=y
+CONFIG_FW_CFG_SYSFS_CMDLINE=y
+CONFIG_ACPI=y
+CONFIG_MODULES=y
+CONFIG_MODULE_UNLOAD=y
+CONFIG_BLK_DEV_BSGLIB=y
+CONFIG_BINFMT_MISC=y
+CONFIG_TRANSPARENT_HUGEPAGE=y
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_PACKET_DIAG=y
+CONFIG_UNIX=y
+CONFIG_NET_KEY=y
+CONFIG_INET=y
+CONFIG_IP_MULTICAST=y
+CONFIG_IP_ADVANCED_ROUTER=y
+CONFIG_BRIDGE=m
+CONFIG_NET_SCHED=y
+CONFIG_VSOCKETS=y
+CONFIG_PCI=y
+CONFIG_PCI_HOST_GENERIC=y
+CONFIG_DEVTMPFS=y
+CONFIG_DEVTMPFS_MOUNT=y
+CONFIG_VIRTIO_BLK=y
+CONFIG_BLK_DEV_SD=y
+CONFIG_CHR_DEV_SG=y
+CONFIG_SCSI_CONSTANTS=y
+CONFIG_SCSI_LOGGING=y
+CONFIG_SCSI_SCAN_ASYNC=y
+CONFIG_SCSI_VIRTIO=y
+CONFIG_ATA=y
+CONFIG_SATA_AHCI_PLATFORM=y
+CONFIG_NETDEVICES=y
+CONFIG_DUMMY=y
+CONFIG_MACVLAN=y
+CONFIG_VIRTIO_NET=y
+CONFIG_NLMON=y
+CONFIG_SERIAL_AMBA_PL011=y
+CONFIG_SERIAL_AMBA_PL011_CONSOLE=y
+CONFIG_VIRTIO_CONSOLE=y
+CONFIG_HW_RANDOM=y
+CONFIG_HW_RANDOM_VIRTIO=y
+CONFIG_TCG_TPM=y
+CONFIG_TCG_TIS=y
+CONFIG_DRM=y
+CONFIG_DRM_VIRTIO_GPU=y
+CONFIG_RTC_CLASS=y
+CONFIG_RTC_DRV_PL031=y
+CONFIG_VIRTIO_PCI=y
+CONFIG_VIRTIO_MMIO=y
+CONFIG_VIRTIO_MMIO_CMDLINE_DEVICES=y
+CONFIG_MAILBOX=y
+CONFIG_PL320_MBOX=y
+CONFIG_ARM_SMMU_V3=y
+CONFIG_EXT4_FS=y
+CONFIG_FUSE_FS=y
+CONFIG_VIRTIO_FS=y
+CONFIG_TMPFS=y
+CONFIG_TMPFS_POSIX_ACL=y

board/qemu/aarch64-sbsa/readme.txt

@@ -0,0 +1,32 @@
+Intro
+=====
+
+The QEMU sbsa-ref machine is primarily meant for firmware development
+and testing according to ARM's SBSA and SBBR standards.
+
+Build
+=====
+
+  $ make qemu_aarch64_sbsa_defconfig
+  $ make
+
+Emulation
+=========
+
+Run the emulation with:
+
+  qemu-system-aarch64 \
+    -M sbsa-ref \
+    -cpu cortex-a57 \
+    -smp 4 \
+    -m 1024 \
+    -nographic \
+    -pflash output/images/SBSA_FLASH0.fd \
+    -pflash output/images/SBSA_FLASH1.fd \
+    -hda output/images/disk.img # qemu_aarch64_sbsa_defconfig
+
+Note that if you want to run sbsa-ref emulation with QEMU provided by
+your distro (i.e., not host-qemu by Buildroot) then you may need to
+install the SeaBIOS package for some required drivers. On Debian:
+
+  # apt install seabios