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222dc0ad91
openwrt/target/linux/armvirt
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Josef Schlehofer 222dc0ad91 armvirt/64: change it to cortex-a53 instead of generic 
Package architecture aarch64_generic [1] can be used just with three
devices. One is NanoPI R2S and then there are two development boards
from NXP. Let's change armvirt/64 to Cortex A53 (aarch64_cortex-a53)
[2]. It has wider support by multiple devices like NanoPI Neo Plus2/Core2,
ESPRESSObin, Pine64, and Raspberry Pi 2&3.

While looking at ARMvirt/32 it has set CPU_TYPE and CPU_SUBTYPE to be
arm_cortex-a15_neon-vfpv4 [3]. It has support to devices like
Linksys EA8500 v1, Linksys EA7500 v1, Netgear D7800, Netgear R7500 and so on.

Tested with:
qemu-system-aarch64 -m 1024 -smp 2 -cpu cortex-a57 -M virt -nographic \
-kernel openwrt-armvirt-64-Image-initramfs

Successfully compiled and booted.
Here goes the output:
root@OpenWrt:/# uname -a
Linux OpenWrt 5.4.82 #0 SMP Sun Dec 13 12:52:10 2020 aarch64 GNU/Linux
root@OpenWrt:/# cat /etc/openwrt_release
DISTRIB_ID='OpenWrt'
DISTRIB_RELEASE='SNAPSHOT'
DISTRIB_REVISION='r15207-96fca0f807'
DISTRIB_TARGET='armvirt/64'
DISTRIB_ARCH='aarch64_cortex-a53'
DISTRIB_DESCRIPTION='OpenWrt SNAPSHOT r15207-96fca0f807'
DISTRIB_TAINTS='no-all'

Also, change BOARDNAME to be the same as it is in armvirt/32.

[1] https://openwrt.org/docs/techref/instructionset/aarch64_generic
[2] https://openwrt.org/docs/techref/instructionset/aarch64_cortex-a53
[3] https://openwrt.org/docs/techref/instructionset/arm_cortex-a15_neon-vfpv4

Signed-off-by: Josef Schlehofer <pepe.schlehofer@gmail.com>
2020-12-14 21:38:10 +00:00
..
32 kernel: remove support for kernel 4.19 2020-10-30 19:29:59 +01:00
64 armvirt/64: change it to cortex-a53 instead of generic 2020-12-14 21:38:10 +00:00
base-files/etc armvirt: new target 2016-12-16 07:56:35 +01:00
image armvirt: fix overlay support by updating to f2fs/ext4 based overlays 2019-06-25 14:12:22 +00:00
config-5.4 kernel: move CONFIG_F2FS_CHECK_FS to generic kernel config 2020-10-11 16:38:16 +02:00
Makefile treewide: remove maintainer variable from targets 2020-03-16 22:21:45 +01:00
README merge: targets: update image generation and targets 2017-12-08 19:41:18 +01:00

README 

This is intended to be used with LEDE project to provide image for use with
QEMU ARM virt machine.

Run with qemu-system-arm

	# boot with initramfs embedded in
	qemu-system-arm -nographic -M virt -m 64 -kernel openwrt-armvirt-32-zImage-initramfs

	# boot with accel=kvm
	qemu-system-arm -nographic -M virt,accel=kvm -cpu host -m 64 -kernel
	openwrt-armvirt-32-zImage-initramfs

	# boot with a separate rootfs
	qemu-system-arm -nographic -M virt -m 64 -kernel openwrt-armvirt-32-zImage \
	  -drive file=openwrt-armvirt-32-root.ext4,format=raw,if=virtio -append 'root=/dev/vda rootwait'

	# boot with local dir as rootfs
	qemu-system-arm -nographic -M virt -m 64 -kernel openwrt-armvirt-32-zImage \
	  -fsdev local,id=rootdev,path=root-armvirt/,security_model=none \
	  -device virtio-9p-pci,fsdev=rootdev,mount_tag=/dev/root \
	  -append 'rootflags=trans=virtio,version=9p2000.L,cache=loose rootfstype=9p'

Run with kvmtool

	# start a named machine
	lkvm run -k openwrt-armvirt-32-zImage -i openwrt-armvirt-32-rootfs.cpio --name armvirt0

	# start with virtio-9p rootfs
	lkvm run -k openwrt-armvirt-32-zImage -d root-armvirt/

	# stop "armvirt0"
	lkvm stop --name armvirt0

	# stop all
	lkvm stop --all

The multi-platform ARMv8 target can be used with QEMU:

	qemu-system-aarch64 -machine virt -cpu cortex-a57 -nographic \
		-kernel openwrt-armvirt-64-Image-initramfs \