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--- riscv-qemu-debian [2025/02/03 11:53]
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^.
@@ Line 50: / Line 47: @@
 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' \
@@ Line 67: / Line 64: @@
 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.
@@ Line 81: / Line 78: @@
 $ 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/

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