Difference between revisions of "QEMU"
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-m : Memory assigned to the Virtualized board in Mega Bytes. <br> <br> | -m : Memory assigned to the Virtualized board in Mega Bytes. <br> <br> | ||
| − | == TIPS<br> == | + | == TIPS<br> == |
=== Extending Rootfs partition<br> === | === Extending Rootfs partition<br> === | ||
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$ cat addon.raw >> igep-nano.img<br> | $ cat addon.raw >> igep-nano.img<br> | ||
| − | <br> | + | We will use Gparted for resize the Rootfs partition, open gparted as root using the igep-nano.img file as:<br> |
| + | |||
| + | $ sudo gparted igep-nano.img | ||
| + | |||
| + | [[Image:Gparted_added_new_space_allocation.png|thumb|center]]Select Partition 2 and using right mouse button click over resize option as: | ||
| + | |||
| + | [[Image:Gparted_select_resize.png|thumb|center]] | ||
<br> | <br> | ||
<br> | <br> | ||
Revision as of 20:03, 10 January 2012
Contents
QEMU on IGEP Boards
QEMU is a generic and open source machine emulator and virtualizer.
When used as a machine emulator, QEMU can run OSes and programs made for one machine (e.g. an ARM board) on a different machine (e.g. your own PC). By using dynamic translation, it achieves very good performance.
When used as a virtualizer, QEMU achieves near native performances by executing the guest code directly on the host CPU. QEMU supports virtualization when executing under the Xen hypervisor or using the KVM kernel module in Linux. When using KVM, QEMU can virtualize x86, server and embedded PowerPC, and S390 guests.
QEMU documentation can be found here.
Build QEMU with IGEP support
Download QEMU sources from linaro git repository:
$ git clone git://git.linaro.org/qemu/qemu-linaro.git
Download IGEP support patch for QEMU from this link and after that apply the patch as:
$ cd qemu-linaro $ patch -p1 < 0001-IGEP_QEMU_support.path
Configure the sources for build with this command:
$ ./configure --target-list=arm-softmmu --prefix=/opt/qemu-linaro
Build the sources:
$ make
Install QEMU:
$ make install
Optionally you can download from here the QEMU binaries, we suggest install it under /opt directory with the right user execution permissions.
Board Emulation
Go to your qemu install directory.
$ cd /opt/qemu-linaro/bin
We provide a QEMU ready image based on Ubuntu/Linaro Nano (Oneric 11.11) image, it can be download from here.
The image has 2 partitions (you can see the partitions using fdisk -ul command as: fdisk -ul igep-nano.img)
Device Boot Start End Blocks Id System
igep-nano.img1 * 63 106494 53232 c FAT32 LBA (Boot)
igep-nano.img2 106496 1048575 470016 83 Linux (Root filesystem)
Optionally you can mount the partitions in you host PC and modify the content as:
First Partition: $ mount -o loop,offset$[63*512] igep-nano.img /mnt/tmp
Second Partition: $ mount -o loop,offset$[106496*512] igep-nano.img /mnt/tmp
Now you're ready for execute the emulator in a console with this command:
qemu-system-arm -M igep -m 512 -clock unix -serial stdio -drive file=igep-nano.img,if=sd,cache=writeback -usb -monitor telnet:localhost:7100,server,nowait,nodelay -device usb-kbd -device usb-mouse
Parameters:
-m : Memory assigned to the Virtualized board in Mega Bytes.
TIPS
Extending Rootfs partition
We will extend the second partition adding a 20 Giga Bytes to rootfs.
First you should create a new raw file using qemu-img as:
$ qemu-img create -f raw addon.raw 20G
it should create a file like this:
-rw-r--r-- 1 mcaro mcaro 21474836480 2012-01-10 19:03 addon.raw
Now we concat at end the addon file to our original file as:
$ cat addon.raw >> igep-nano.img
We will use Gparted for resize the Rootfs partition, open gparted as root using the igep-nano.img file as:
$ sudo gparted igep-nano.img
Select Partition 2 and using right mouse button click over resize option as:
