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| 1 | Poky images with QEMU | ||
| 2 | ===================== | ||
| 3 | |||
| 4 | Poky can generate qemu bootable kernels and images with can be used | ||
| 5 | on a desktop system. Both arm and x86 images can currently be booted. | ||
| 6 | There are two scripts, runqemu and poky-qemu, one for use within poky, | ||
| 7 | the other externally. | ||
| 8 | |||
| 9 | QEMU outside Poky (poky-qemu) | ||
| 10 | ============================= | ||
| 11 | |||
| 12 | The poky-qemu script is run as: | ||
| 13 | |||
| 14 | MACHINE=<machine> poky-qemu <zimage> <filesystem> | ||
| 15 | |||
| 16 | where: | ||
| 17 | |||
| 18 | <zimage> is the path to a kernel (e.g. zimage-qemuarm.bin) | ||
| 19 | <filesystem> is the path to an ext2 image (e.g. filesystem-qemuarm.ext2) | ||
| 20 | <machine> is "qemuarm" or "qemux86" | ||
| 21 | |||
| 22 | The MACHINE=<machine> prefix is optional and without it the script will try | ||
| 23 | to detect the machine name from the name of the <zimage> file. | ||
| 24 | |||
| 25 | If <filesystem> isn't specified, nfs booting will be assumed. | ||
| 26 | |||
| 27 | |||
| 28 | QEMU within Poky (runqemu) | ||
| 29 | ========================== | ||
| 30 | |||
| 31 | The runqemu script is run as: | ||
| 32 | |||
| 33 | runqemu <target> <type> <zimage> <filesystem> | ||
| 34 | |||
| 35 | where: | ||
| 36 | |||
| 37 | <target> is "qemuarm" or "qemux86" | ||
| 38 | <type> is "ext2" or "nfs" | ||
| 39 | <zimage> is the path to a kernel (zimage-qemuarm.bin) | ||
| 40 | <filesystem> is the path to an ext2 image (filesystem-qemuarm.ext2) | ||
| 41 | |||
| 42 | It will default to the qemuarm, ext2 and the last kernel and oh-image-sdk | ||
| 43 | image built by poky. | ||
| 44 | |||
| 45 | |||
| 46 | Notes | ||
| 47 | ===== | ||
| 48 | |||
| 49 | - The scripts run qemu using sudo. Change perms on /dev/net/tun to | ||
| 50 | run as non root | ||
| 51 | - You can access the host computer at 192.168.7.1 within the image. | ||
| 52 | - Your qemu system will be accessible as 192.16.7.2. | ||
| 53 | - The default NFS mount points are /srv/nfs/qemux86 or /srv/nfs/qemuarm | ||
| 54 | depending on the target type. | ||
| 55 | - You can set QEMU_MEMORY to control amount of available memory (default 64M). | ||
| 56 | - You can set SERIAL_LOGFILE to have the serial output from the image logged | ||
| 57 | to a file. | ||
| 58 | |||
| 59 | |||
| 60 | NFS Image Notes | ||
| 61 | =============== | ||
| 62 | |||
| 63 | As root; | ||
| 64 | |||
| 65 | % apt-get install nfs-kernel-server | ||
| 66 | |||
| 67 | % mkdir /srv/nfs/qemuarm | ||
| 68 | |||
| 69 | Edit via /etc/exports : | ||
| 70 | |||
| 71 | # /etc/exports: the access control list for filesystems which may be exported | ||
| 72 | # to NFS clients. See exports(5). | ||
| 73 | /srv/nfs/qemuarm 192.168.7.2(rw,no_root_squash) | ||
| 74 | |||
| 75 | % /etc/init.d/nfs-kernel-server restart | ||
| 76 | |||
| 77 | % modprobe tun | ||
| 78 | |||
| 79 | untar build/tmp/deploy/images/<built image>.rootfs.tar.bz2 into /srv/nfs/qemuarm | ||
| 80 | |||
| 81 | Finally, launch: | ||
| 82 | |||
| 83 | % runqemu <target> nfs | ||
| 84 | |||
| 85 | (Substitute qemux86 for qemuarm when using qemux86) | ||
| 86 | |||
| 87 | |||
| 88 | Known Issues | ||
| 89 | ============ | ||
| 90 | |||
| 91 | - There is a bug in the ARM qemu in that means occasionally it will use 100% | ||
| 92 | cpu. You will need to restart it in this situation. | ||
| 93 | - There is a problem with the ARM image not auto assigning an IP when using an | ||
| 94 | ext2 image. To have working TCP/IP connectivity run: | ||
| 95 | 'ifconfig eth0 192.168.7.2 up' | ||
| 96 | |||
