configs/qemu_aarch64_sbsa_defconfig: new config for QEMU sbsa-ref

This introduces a configuration for the SBSA reference machine under
QEMU that is intended for developing and testing firmware. It consists
of ATF that load EDK2 as BL33 which in turn will load GRUB2.

Included with the board files is a minimal kernel configuration, almost
identical to that of board/qemu/aarch64-virt/linux.config. The main
difference is the addition of ACPI which is preferred over DTB for
booting an UEFI system.

Signed-off-by: Dick Olsson <hi@senzilla.io>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

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

@@ -0,0 +1,30 @@
+image efi-part.vfat {
+  vfat {
+    file startup.nsh {
+      image = "efi-part/startup.nsh"
+    }
+    file EFI {
+      image = "efi-part/EFI"
+    }
+    file Image {
+      image = "Image"
+    }
+  }
+  size = 32M
+}
+
+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

@@ -0,0 +1,6 @@
+set default="0"
+set timeout="5"
+
+menuentry "Buildroot" {
+	linux /Image root=/dev/sda2 rootwait console=ttyAMA0
+}

board/qemu/aarch64-sbsa/linux.config

@@ -0,0 +1,68 @@
+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-a53 \
+    -smp 4 \
+    -m 1024 \
+    -nographic \
+    -pflash output/images/SBSA_FLASH0.fd \
+    -pflash output/images/SBSA_FLASH1.fd \
+    -hda output/images/disk.img
+
+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

configs/qemu_aarch64_sbsa_defconfig

@@ -0,0 +1,49 @@
+# Architecture
+BR2_aarch64=y
+BR2_cortex_a53=y
+
+# Toolchain
+BR2_TOOLCHAIN_BUILDROOT_WCHAR=y
+
+# System
+BR2_SYSTEM_DHCP="eth0"
+BR2_TARGET_GENERIC_GETTY_PORT="ttyAMA0"
+
+# Filesystem
+BR2_TARGET_ROOTFS_EXT2=y
+BR2_TARGET_ROOTFS_EXT2_4=y
+# BR2_TARGET_ROOTFS_TAR is not set
+
+# Image
+BR2_ROOTFS_POST_IMAGE_SCRIPT="board/qemu/aarch64-sbsa/assemble-flash-images support/scripts/genimage.sh"
+BR2_ROOTFS_POST_SCRIPT_ARGS="-c board/qemu/aarch64-sbsa/genimage.cfg"
+
+# Linux headers same as kernel, a 5.10 series
+BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_5_10=y
+
+# Kernel
+BR2_LINUX_KERNEL=y
+BR2_LINUX_KERNEL_CUSTOM_VERSION=y
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="5.10.34"
+BR2_LINUX_KERNEL_USE_ARCH_DEFAULT_CONFIG=y
+BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y
+
+# UEFI firmware
+BR2_TARGET_EDK2=y
+BR2_TARGET_EDK2_PLATFORM_QEMU_SBSA=y
+BR2_TARGET_GRUB2=y
+BR2_TARGET_GRUB2_ARM64_EFI=y
+
+# ARM Trusted Firmware
+BR2_TARGET_ARM_TRUSTED_FIRMWARE=y
+BR2_TARGET_ARM_TRUSTED_FIRMWARE_PLATFORM="qemu_sbsa"
+BR2_TARGET_ARM_TRUSTED_FIRMWARE_FIP=y
+
+# Host tools for genimage
+BR2_PACKAGE_HOST_GENIMAGE=y
+BR2_PACKAGE_HOST_DOSFSTOOLS=y
+BR2_PACKAGE_HOST_MTOOLS=y
+
+# host-qemu for gitlab testing
+BR2_PACKAGE_HOST_QEMU=y
+BR2_PACKAGE_HOST_QEMU_SYSTEM_MODE=y