PC Recycler

User Tools

Site Tools

Trace:
riscv-qemu-debian

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Next revision 		Previous revision
riscv-qemu-debian [2025/02/03 11:50]
admin 		riscv-qemu-debian [2025/06/14 15:07] (current)
me
Line 1: Line 1:
-Here are the simple steps: 
- 
-Pre-Step 
  
 Install QEMU on your system.  Follow the instructions at the official QEMU site^. Install QEMU on your system.  Follow the instructions at the official QEMU site^.
Line 18: Line 15:
      kernel – linux kernel      kernel – linux kernel
      readme.txt – readme provides command line for QEMU      readme.txt – readme provides command line for QEMU
-     ssh_user_ecdsa_key — stuff I don’t know +     ssh_user_ecdsa_key  
-     ssh_user_ed25519_key — don’t know +     ssh_user_ed25519_key  
-     ssh_user_rsa_key — don’t know.+     ssh_user_rsa_key 
  
 The readme contains the QEMU command that you can use to start virtual environment. The readme contains the QEMU command that you can use to start virtual environment.
Line 39: Line 36:
 You can actually download those two files and place them anywhere you want on your local computer. You can actually download those two files and place them anywhere you want on your local computer.
  
-RISC-V-Assembly-Language-Programming/Chapter 1/QEMU at main · Apress/RISC-V-Assembly-Language-Programming · GitHub[^]+RISC-V-Assembly-Language-Programming/Chapter 1/QEMU at main · Apress/RISC-V-Assembly-Language-Programming · GitHub[[https://github.com/Apress/RISC-V-Assembly-Language-Programming/tree/main/Chapter%201/QEMU]]
  
 Make sure that when you download each file that you download the RAW file.  GitHub does a weird thing and will download them as odd text files if you don't use the RAW option. Make sure that when you download each file that you download the RAW file.  GitHub does a weird thing and will download them as odd text files if you don't use the RAW option.
Line 50: Line 47:
 Note: There cannot be any spaces after the line-continuation-character (\). Note: There cannot be any spaces after the line-continuation-character (\).
  
-I've broken the command up over lines so you can see each argument which is passed to the QEMU executable?  Did you know there is a separate EXE for each QEMU platform (riscv64, x86_64, etc.)?   +I've broken the command up over lines so you can see each argument which is passed to the QEMU executable.  There is a separate EXE for each QEMU platform (riscv64, x86_64, etc.)  
-BAT+
  
 qemu-system-riscv64 -machine 'virt' \ qemu-system-riscv64 -machine 'virt' \
Line 67: Line 64:
  
 Once you start the virtual environment login using : Once you start the virtual environment login using :
-root (username) and root (pwd)+root(username) and root (pwd)
  
 Now you can install the build_essential packages so you can write assembly and link. Now you can install the build_essential packages so you can write assembly and link.
Line 81: Line 78:
  
 $ ld --version $ ld --version
 +
 +--------------------------------------------------------------------------------------------------------
 +
 +====Mounting Raw and qcow2 Images====
 +Posted on 15 July 2016 by Albert de Vera
 +
 +Mounting Raw and qcow2 images in order to inspect and use them doesn’t have to be difficult. After searching the internet, we found a couple of recommendations on how to do it. Here is what we did ourselves on an Ubuntu 16.04 Linux host.
 +Mounting The Raw Image
 +
 +Associate the raw image with a loop device:
 +
 +losetup /dev/loop0 image.raw
 +
 +Map the partitions to loop devices:
 +
 +kpartx -a /dev/loop0
 +
 +You should be able to mount the partitions now:
 +
 +mount /dev/mapper/loop0p1 /mnt/t01
 +
 +where /mnt/t01 is a previously-existing mount point or directory.
 +
 +For LVM partitions, determine the volume group name and activate it:
 +
 +vgscan
 +vgchange -ay vg_volgroupname
 +
 +Mount the desired logical volume:
 +
 +mount /dev/mapper/vg_volgroupname-lg_logicalgroupname /mnt/t02
 +
 +where /mnt/t02 is another pre-existing mount point or directory.
 +Unmounting The Raw Image
 +
 +Unmount the previously mounted partitions:
 +
 +umount /dev/t02
 +umount /dev/t01
 +
 +Deactivate the volume group:
 +
 +vgchange -an vg_volgroupname
 +
 +Undo the mapping of the partitions to the loop devices:
 +
 +kpartx -d /dev/loop0
 +
 +Destroy the loop:
 +
 +losetup -d /dev/loop0
 +
 +Mounting The qcow2 Image
 +
 +Here, we shall use the QEMU Network Block Device Driver for the purposes of mounting the qcow2 image.
 +
 +First, load the nbd driver.
 +
 +modprobe nbd max_part=63
 +
 +Connect nbd to the image using qemu-nbd:
 +
 +qemu-nbd -c /dev/nbd0 disk1.qcow2
 +
 +Using fdisk, check the existing partitions. Mount the regular Linux partitions as is:
 +
 +mount /dev/nbd0p1 /mnt/t01
 +
 +For LVM partitions, associate a loopback device to the LVM partition:
 +
 +losetup /dev/loop0 /dev/nbd0p2
 +
 +See the LVM partitions under /dev/mapper:
 +
 +ls -l /dev/mapper
 +
 +You should also be able to display the logical partitions using lvdisplay and the volume groups with vgdisplay. Use vgchange as above to activate the volume group.
 +
 +Mount the regular LVM partitions as usual:
 +
 +mount /dev/mapper/vg_volgroupname-lv_logicalgroupname /mnt/t02
 +
 +Unmounting the qcow2 Image
 +
 +Unmount the partitions from the qcow2 image:
 +
 +umount /mnt/t02
 +umount /mnt/t01
 +
 +Deactivate the volume group:
 +
 +vgchange -an vg_volgroupname
 +
 +Remove the loopback device:
 +
 +losetup -d /dev/loop0
 +
 +Disconnect the nbd device:
 +
 +qemu-nbd -d /dev/nbd0
 +
 +Finally, remove the nbd kernel module:
 +
 +rmmod nbd
 +
 +We have successfully used the above procedures in mounting and unmounting raw and qcow2 images used in Linux KVM.
 +
 +The procedures described above have been adapted for this article from these URLs:
 +
 +    https://www.redhat.com/archives/linux-lvm/2008-June/msg00045.html
 +    http://alexeytorkhov.blogspot.com/2009/09/mounting-raw-and-qcow2-vm-disk-images.html
 +
 +https://www.linuxunbound.com/2016/07/15/mounting-raw-and-qcow2-images/
  
  
riscv-qemu-debian.1738583411.txt.gz · Last modified: 2025/02/03 11:50 by admin

Page Tools

Except where otherwise noted, content on this wiki is licensed under the following license: CC Attribution-Share Alike 4.0 International
CC Attribution-Share Alike 4.0 International Donate Powered by PHP Valid HTML5 Valid CSS Driven by DokuWiki