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runqemu: support rootfs mounted ro

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Optionally allow to set QB_KERNEL_ROOT to e.g. "/dev/vda ro" to mount the
rootfs reay-only in Qemu.

(From OE-Core rev: 448eb1fd21287ba16b17e9402ce040b86ae3638c)

Signed-off-by: Adrian Freihofer <adrian.freihofer@siemens.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Adrian Freihofer
2021-11-12 23:29:18 +01:00
committed by Richard Purdie
parent 7ca8dd76ea
commit 9c3e6fd9b6
2 changed files with 9 additions and 1 deletions
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meta/classes/qemuboot.bbclass
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@@ -36,6 +36,8 @@
# in system mode, where system is experiencing entropy starvation
#
# QB_KERNEL_ROOT: kernel's root, e.g., /dev/vda
# By default "/dev/vda rw" gets passed to the kernel.
# To mount the rootfs read-only QB_KERNEL_ROOT can be set to e.g. "/dev/vda ro".
#
# QB_NETWORK_DEVICE: network device, e.g., "-device virtio-net-pci,netdev=net0,mac=@MAC@",
# it needs work with QB_TAP_OPT and QB_SLIRP_OPT.