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| author | James Bulpin <James.Bulpin@eu.citrix.com> | 2013-07-03 17:52:09 +0000 |
|---|---|---|
| committer | Ian Campbell <ian.campbell@citrix.com> | 2013-07-04 11:13:37 +0100 |
| commit | 767423f20561f45795c61ef66b7526f9a567335e (patch) | |
| tree | 151f783941aa267cd540132aefa26d1f5fc5e282 /docs | |
| parent | b9fa02b9011f8baf753e1539c921804a32b228a8 (diff) | |
| download | xen-767423f20561f45795c61ef66b7526f9a567335e.tar.gz xen-767423f20561f45795c61ef66b7526f9a567335e.tar.bz2 xen-767423f20561f45795c61ef66b7526f9a567335e.zip | |
docs: record reservations of device IDs under the Xen vendor ID
This patch introduces a documentation file to record reservations of
ranges of PCI device IDs within the Xen vendor ID 0x5853.
Signed-off-by: James Bulpin <james.bulpin@citrix.com>
Acked-by: Keir Fraser <keir@xen.org>
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/misc/pci-device-reservations.txt | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/docs/misc/pci-device-reservations.txt b/docs/misc/pci-device-reservations.txt new file mode 100644 index 0000000000..19bd9d5f81 --- /dev/null +++ b/docs/misc/pci-device-reservations.txt @@ -0,0 +1,31 @@ +PCI vendor ID 0x5853 has been reserved for use by Xen systems in order to +advertise certain virtual hardware to guest virtual machines. The primary +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. + +Some Xen vendors wish to provide alternative and/or additional guest drivers +that can bind to virtual devices. This may be done using the Xen PCI vendor +ID of 0x5853 and Xen-vendor/device specific PCI device IDs. This file +records reservations made within the device ID range in order to avoid +multiple Xen vendors using conflicting IDs. + +Guidelines + 1. A vendor may request a range of device IDs by submitting a patch to + this file. + 2. Vendor allocations should be in the range 0xc000-0xfffe to reduce the + possibility of clashes with community IDs assigned from the bottom up. + 3. The vendor is responsible for allocations within the range and should + try to record specific device IDs in PCI ID databases such as + http://pciids.sourceforge.net and http//www.pcidatabase.com + +Reservations +============ + + range | vendor/product +--------------+-------------------------------------------------------------- +0x0001 | (Xen Platform PCI device) +0x0002 | Citrix XenServer (grandfathered allocation for XenServer 6.1) +0xc000-0xc0ff | Citrix XenServer +0xc100-0xc1ff | Citrix XenClient |