On 02/01/2017 07:20 PM, Andrea Bolognani wrote:
Instead of having a single sample configuration file,
we now have several:
* q35-emulated.cfg documents the default devices QEMU
adds to a q35 guest and the additional devices that
are pretty much guaranteed to be present in a
physical q35-based machine;
Hi Andrea,
* q35-virtio-graphical.cfg can be used to start a
fully-featured (USB, graphical console, audio, etc.)
guest that uses VirtIO instead of emulated devices;
* q35-virtio-serial.cfg is similar but has a minimal
set of devices and uses the serial console.
All configuration files are fully commented and neatly
organized.
Appreciated.
---
Changes since [v1]
* Address review comments:
- improve the existing configuration file instead
of removing it;
- split off the common part for VirtIO guests;
- plug all ioh3420 devices in a single slot;
- use slot 1c for ioh3420 devices;
- remove useless USB keyboard.
* Improve usage description:
- make sure the OS disk actually uses the VirtIO
SCSI controller, as intended, rather than the
built-in SATA one;
- provide a command line for running live CDs.
* Document more devices:
- the video card is added by default;
- so is the Ethernet adapter, apparently.
The last part seems to clash with some of Gerd's comments,
so I'm kinda puzzled.
[v1] http://lists.nongnu.org/archive/html/qemu-devel/2017-01/msg06342.html
[...]
+
+# Machine options
+# =========================================================
+#
+# We use the q35 machine type and enable KVM acceleration
+# for better performance.
+
+[machine]
+ type = "q35"
+ accel = "kvm"
+
+
+# PCI Express controllers
+# =========================================================
+#
+# We add four PCIe Root Ports, all sharing the same slot
+# on the PCIe Root Bus. These ports support hotplug.
+
+[device "ich9-pcie-port-1"]
I would use the new generic root port.
+ driver = "ioh3420"
+ multifunction = "on"
+ bus = "pcie.0"
+ addr = "1c.0"
+ port = "1"
+ chassis = "1"
+
+[device "ich9-pcie-port-2"]
+ driver = "ioh3420"
+ multifunction = "on"
+ bus = "pcie.0"
+ addr = "1c.1"
+ port = "2"
+ chassis = "2"
+
+[device "ich9-pcie-port-3"]
+ driver = "ioh3420"
+ multifunction = "on"
+ bus = "pcie.0"
+ addr = "1c.2"
+ port = "3"
+ chassis = "3"
+
+[device "ich9-pcie-port-4"]
+ driver = "ioh3420"
+ multifunction = "on"
+ bus = "pcie.0"
+ addr = "1c.3"
+ port = "4"
+ chassis = "4"
+
+
+# Legacy PCI controllers
+# =========================================================
+#
+# This bridge can be used to build an independent topology
+# for legacy PCI devices.
+
+[device "ich9-pci-bridge"]
+ driver = "i82801b11-bridge"
+ bus = "pcie.0"
+ addr = "1e.0"
+
I am not sure about having the DMI-PCI bridge "by default".
Users can understand is actually a good idea to have it by default
while we don't really want them to use legacy PCI devices on Q35;
and even if so, they should use them as Integrated Endpoints.
They don't have hotplug for the DMI-PCI bridge anyway.
[...]
--- /dev/null
+++ b/docs/q35-virtio-common.cfg
@@ -0,0 +1,82 @@
+# q35 - VirtIO guest (common bits)
+# =========================================================
+#
+# Not very useful on its own. See q35-virtio-graphical.cfg
+# and q35-virtio-serial.cfg for usage instructions.
+
+
+# Machine options
+# =========================================================
+#
+# We use the q35 machine type and enable KVM acceleration
+# for better performance.
+
+[machine]
+ type = "q35"
+ accel = "kvm"
+
+
+# PCIe controllers
+# =========================================================
+#
+# We create eight PCIe Root Ports, and we plug them all
+# into separate functions of the same slot. Some of them
+# will be used by devices, the rest will remain available
+# for hotplug.
+
+[device "pci.1"]
+ driver = "ioh3420"
Same here, maybe we can use the new generic port.
Thanks for taking your time to update the configuration files!
Marcel
I personally don't use them because every time I try, I
find something with no config support....
+ bus = "pcie.0"
+ addr = "0x1c.0x0"
+ port = "0x10"
+ chassis = "1"
+ multifunction = "on"
+
+[device "pci.2"]
+ driver = "ioh3420"
+ bus = "pcie.0"
+ addr = "0x1c.0x1"
+ port = "0x11"
+ chassis = "2"
+
+[device "pci.3"]
+ driver = "ioh3420"
+ bus = "pcie.0"
+ addr = "0x1c.0x2"
+ port = "0x12"
+ chassis = "3"
+
+[device "pci.4"]
+ driver = "ioh3420"
+ bus = "pcie.0"
+ addr = "0x1c.0x3"
+ port = "0x13"
+ chassis = "4"
+
+[device "pci.5"]
+ driver = "ioh3420"
+ bus = "pcie.0"
+ addr = "0x1c.0x4"
+ port = "0x14"
+ chassis = "5"
+
+[device "pci.6"]
+ driver = "ioh3420"
+ bus = "pcie.0"
+ addr = "0x1c.0x5"
+ port = "0x15"
+ chassis = "6"
+
+[device "pci.7"]
+ driver = "ioh3420"
+ bus = "pcie.0"
+ addr = "0x1c.0x6"
+ port = "0x16"
+ chassis = "7"
+
+[device "pci.8"]
+ driver = "ioh3420"
+ bus = "pcie.0"
+ addr = "0x1c.0x7"
+ port = "0x17"
+ chassis = "8"
[...]
