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openwrt/target/linux/armvirt
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Tony Ambardar 5df84814bb kernel: enable (ARM|ARM64)_MODULE_PLTS in generic config 
This allows loading modules with large memory requirements, recently needed
while testing on armvirt/32. Past forum discussions [1] and bug reports [2]
also raised this and the ipq806x target already set it in response [3].
Given this increases kernel image size by only ~1KB, is generally useful on
multi-platform kernels, and enabled by default on upstream arm32 Linux, add
it to the generic config.

The setting has similar utility on arm64, is a requirement for KASLR, and
already enabled on most OpenWrt aarch64 targets, so pull this into the
top-level generic config.

[1]: https://forum.openwrt.org/t/vmap-allocation-for-size-442368-failed-use-vmalloc-size-to-increase-size/34545/7
[2]: https://github.com/openwrt/openwrt/issues/8282
[3]: f81e148eb6 ("ipq806x: update 4.19 kernel config").

Signed-off-by: Tony Ambardar <itugrok@yahoo.com>
(cherry picked from commit c2d194a34e)
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
2023-05-24 19:26:41 +01:00
..
32 treewide: remove files for building 5.10 kernel 2023-05-12 13:02:43 +02:00
64 kernel: enable (ARM|ARM64)_MODULE_PLTS in generic config 2023-05-24 19:26:41 +01:00
base-files/etc treewide: remove execute bit and shebang from board.d files 2021-03-06 11:30:06 +01:00
image target: use SPDX license identifiers on Makefiles 2021-02-10 15:47:18 +01:00
config-5.15 kernel: Activate CONFIG_GPIOLIB in generic configuration 2022-08-10 21:36:17 +02:00
Makefile armvirt: make 5.15 kernel default 2022-09-14 16:45:06 +02:00
README armvirt: README: rename it from LEDE to OpenWrt 2020-12-14 21:38:10 +00:00

README 

This is intended to be used with OpenWrt 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 \