On 01/02/2014 03:43 PM, Roger Pau Monne wrote:
Since Xen PVH guests doesn't have ACPI, we need to create a dummy
bus so top level Xen devices can attach to it (instead of
attaching directly to the nexus) and a pvcpu device that will be used
to fill the pcpu->pc_device field.
---
sys/conf/files.amd64 | 1 +
sys/conf/files.i386 | 1 +
sys/x86/xen/xenpv.c | 155 ++++++++++++++++++++++++++++++++++++++++++++++++++
I think it makes more sense to have 2 files: one for xenpv bus and one
for a dummy pvcpu device. It would allow us to move xenpv bus to common
code (sys/xen or sys/dev/xen).
[..]
+
+static int
+xenpv_probe(device_t dev)
+{
+
+ device_set_desc(dev, "Xen PV bus");
+ device_quiet(dev);
+ return (0);
As I understand, 0 means I can "handle" the current device, in this case
if a device is probing, because it doesn't have yet a driver, we will
use xenpv and end up with 2 (or even more) xenpv buses.
As we only want to probe xenpv bus once, when the bus was added
manually, returning BUS_PROBE_NO_WILDCARD would suit better.
[..]
+static int
+xenpvcpu_probe(device_t dev)
+{
+
+ device_set_desc(dev, "Xen PV CPU");
+ return (0);
Same here: BUS_PROBE_NOWILDCARD.
--
Julien Grall
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