For non pci express passthrough additional addresses are reserved.
For pcie passthrough pcie root ports are needed (unless guest is like
windows 7).
The first 4 pcie root ports are defined by default in the pve-q35*.cfg
files. If more than 4 pcie devices are passed through the needed root
ports are created on demand. This helps to keep live migration possible
without adding a new pve-q35*.cfg file.
For the windows 7 like guests additional addresses are reserved as well.
Signed-off-by: Aaron Lauterer <a.lauterer@proxmox.com>
with such a shared memory device, a vm can share data with other
vms or with the host via memory
one of the use cases is looking-glass[1] with pci-passthrough, which copies
the guest fb to the host and you get a high-speed, low-latency
display client for the vm
on vm stop we delete the file again
1: https://looking-glass.hostfission.com/
Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
Win7 is very picky about pcie assignments and fails with
'error 12' the way we add hospci devices.
To combat that, we simply give the hostpci device a normal port
instead.
Start with address 0x10, so that we have space before those devices,
and between them and the ones configured in pve-q35.cfg should we
need it in the future.
Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
On arm we start off with a pcie bridge pcie.0. We need a
keyboard in addition to the tablet device, and we need to
connect both to an 'ehci' controller.
To do all this, we also pass the $arch variable through a
whole lot of function calls to ultimately also adapt the
hotplug code to take care of the new keyboard device.
Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
we change 'vga' to a property string and add a 'memory' property
with this, the user can better control the memory given to the virtual
gpu, this is especially useful for spice/qxl since high resolutions need
more memory
Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
