diff mbox series

docs: Add some details on XenServer PCI devices

Message ID 20250228152100.23105-1-frediano.ziglio@cloud.com (mailing list archive)
State New
Headers show
Series docs: Add some details on XenServer PCI devices | expand

Commit Message

Frediano Ziglio Feb. 28, 2025, 3:21 p.m. UTC 
Describe the usage of devices 5853:0002 and 5853:C000.

Signed-off-by: Frediano Ziglio <frediano.ziglio@cloud.com>
---
 docs/man/xen-pci-device-reservations.7.pod | 9 +++++++++
 1 file changed, 9 insertions(+)
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Patch

diff --git a/docs/man/xen-pci-device-reservations.7.pod b/docs/man/xen-pci-device-reservations.7.pod
index 9ddf3a18ad..62f3bd2105 100644
--- a/docs/man/xen-pci-device-reservations.7.pod
+++ b/docs/man/xen-pci-device-reservations.7.pod
@@ -10,6 +10,8 @@  use of this is with device ID 0x0001 to advertise the Xen Platform PCI
 device - the presence of this virtual device enables a guest Operating
 System (subject to the availability of suitable drivers) to make use of
 paravirtualisation features such as disk and network devices etc.
+XenServer, for Windows machines, presents Xen Platform device with device
+ID 0x0002 instead of 0x0001.
 
 Some Xen vendors wish to provide alternative and/or additional guest drivers
 that can bind to virtual devices[1]. This may be done using the Xen PCI
@@ -86,4 +88,11 @@  and unplug protocol.
 libxl provides support for creation of a single additional xen-pvdevice.
 See the vendor_device parameter in xl.cfg(5).
 
+=item 2.
+
+XenServer, for Windows machines, presents a device with ID 0xC000.
+This device is a placeholders for Windows update.
+Device 0xC000 is presented with a Xen Platform PCI device, usually with ID
+0x0002.
+
 =back