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Delegate 'What is the process flow' paragraph to Qubes 4.0 section

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Kamil Aronowski 2022-10-27 17:36:55 +02:00
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@ -94,23 +94,6 @@ In the `/var/log/libvirst/libxl/`, `/var/log/qubes/` and `/var/log/xen/console/`
QtCreator.
### What is the process flow when starting an AppVM under Qubes R4.x?
1. qvm-start sends a request to qubesd, using Admin API
2. qubesd starts required netvm (recursively), if needed
3. qubesd request qmemman to allocate needed memory for new VM (according to VM's 'memory' property)
4. qubesd calls into appropriate storage pool driver to prepare for VM startup (create copy-on-write layers etc)
5. qubesd gathers needed VM properties etc and builds libvirt VM configuration (XML format, can be seen using `virsh dumpxml`)
6. qubesd calls into libvirt to start the VM (but in paused mode)
7. libvirt setup the VM using libxl, this include starting stubdomain if needed
8. qubesd start auxiliary processes, including:
- qrexec-daemon
- qubesdb-daemon (and fill its content)
9. libvirt unpause the VM
10. qvm-start-gui process (running separately from qubesd, as part of dom0 user GUI session) starts gui daemon
See "source" link [here](https://dev.qubes-os.org/projects/core-admin/en/latest/qubes-vm/qubesvm.html#qubes.vm.qubesvm.QubesVM.start).
### What is the process flow when opening a link/file in another VM ?
1. in an AppVM ('srcVM') a link - or file - is set to be opened with the graphical "open in VM" or "open in dispVM" extensions (or respectively with the `/usr/bin/qvm-open-in-vm` or `/usr/bin/qvm-open-in-dvm` command line tools)
@ -335,3 +318,20 @@ Then we define a new disk device - the syntax here is quite obvious and follows
Now when you boot foo, Qubes will pick up this file, and attach /dev/sdb to the foo qube, where it will appear as /dev/xvde.
You can put an entry in to /etc/fstab so that the /dev/xvde device will be automatically mounted where you will.
### What is the process flow when starting an AppVM under Qubes R4.x?
1. qvm-start sends a request to qubesd, using Admin API
2. qubesd starts required netvm (recursively), if needed
3. qubesd request qmemman to allocate needed memory for new VM (according to VM's 'memory' property)
4. qubesd calls into appropriate storage pool driver to prepare for VM startup (create copy-on-write layers etc)
5. qubesd gathers needed VM properties etc and builds libvirt VM configuration (XML format, can be seen using `virsh dumpxml`)
6. qubesd calls into libvirt to start the VM (but in paused mode)
7. libvirt setup the VM using libxl, this include starting stubdomain if needed
8. qubesd start auxiliary processes, including:
- qrexec-daemon
- qubesdb-daemon (and fill its content)
9. libvirt unpause the VM
10. qvm-start-gui process (running separately from qubesd, as part of dom0 user GUI session) starts gui daemon
See "source" link [here](https://dev.qubes-os.org/projects/core-admin/en/latest/qubes-vm/qubesvm.html#qubes.vm.qubesvm.QubesVM.start).