Yuji Shimada
2008-Dec-25 07:08 UTC
[Xen-devel] [PATCH 0/4] dom0 linux: Reserve device for guest with device path
This series of patches add the function to dom0 linux to reserve PCI
device for guest domain with device path. Following is example of device
path.
PNP0A03:100-1c.1-00.0
Currently if we assign PCI device to guest domain, we have to specify
PCI device with "pciback.hide=" boot parameter. If PCI device has
small
memory resource and BIOS does not assign page-aligned memory resource,
we have to specify PCI device with "reassigndev=" boot parameter also.
"pciback.hide=" and "reassigndev=" use SBDF(Segment#, Bus#,
Device#,
Function#). Segment# and Bus# can be changed at boot time. So they are
not suitable for specifying PCI device at boot time.
My patches integrate "pciback.hide=" and "reassigndev=" into
one
"guestdev=" boot parameter. So we have to specify only one boot
parameter. The format of device path is following.
<hid>[:<uid>]-<dev>.<func>[-<dev>.<func>[...]]
Device path is not changed at boot time. So it is suitable for
specifying PCI device at boot time.
My patches add "reassign_resources" boot parameter too. If
reassignment
is needed, please set it.
Following is example of dom0 linux''s boot parameter.
reassign_resources guestdev=PNP0A03:100-1c.1-00.0,PNP0A03:100-1d.7
The series consists of following patches.
1. Expose HID,UID,SEG,BBN of PCI root bridge via sysfs.
2. Add "guestdev=" boot parameter.
3. Bind PCI back driver to PCI device specified by "guestdev=".
4. Cleanup function name relating resource reassignment.
I will take a vacation from 27 Dec. to 4 Jan. I will not be able to
respond to a mail.
Thanks,
--
Yuji Shimada.
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Yuji Shimada
2008-Dec-26 04:28 UTC
Re: [Xen-devel] [PATCH 0/4] dom0 linux: Reserve device for guest with device path
Please find attached a example script to convert SBDF to device path. The script can be executed as follows. # chmod 755 device_path.py # device_path.py 07:00.0 PNP0A03:100-1c.1-00.0 I will take a vacation from 27 Dec. to 4 Jan. I will not be able to respond to a mail. Thanks, -- Yuji Shimada On Thu, 25 Dec 2008 16:08:01 +0900 Yuji Shimada <shimada-yxb@necst.nec.co.jp> wrote:> This series of patches add the function to dom0 linux to reserve PCI > device for guest domain with device path. Following is example of device > path. > > PNP0A03:100-1c.1-00.0 > > > Currently if we assign PCI device to guest domain, we have to specify > PCI device with "pciback.hide=" boot parameter. If PCI device has small > memory resource and BIOS does not assign page-aligned memory resource, > we have to specify PCI device with "reassigndev=" boot parameter also. > > "pciback.hide=" and "reassigndev=" use SBDF(Segment#, Bus#, Device#, > Function#). Segment# and Bus# can be changed at boot time. So they are > not suitable for specifying PCI device at boot time. > > > My patches integrate "pciback.hide=" and "reassigndev=" into one > "guestdev=" boot parameter. So we have to specify only one boot > parameter. The format of device path is following. > > <hid>[:<uid>]-<dev>.<func>[-<dev>.<func>[...]] > > Device path is not changed at boot time. So it is suitable for > specifying PCI device at boot time. > > > My patches add "reassign_resources" boot parameter too. If reassignment > is needed, please set it. > > > Following is example of dom0 linux''s boot parameter. > > reassign_resources guestdev=PNP0A03:100-1c.1-00.0,PNP0A03:100-1d.7 > > > The series consists of following patches. > > 1. Expose HID,UID,SEG,BBN of PCI root bridge via sysfs. > 2. Add "guestdev=" boot parameter. > 3. Bind PCI back driver to PCI device specified by "guestdev=". > 4. Cleanup function name relating resource reassignment. > > > I will take a vacation from 27 Dec. to 4 Jan. I will not be able to > respond to a mail. > > Thanks, > -- > Yuji Shimada. > > > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xensource.com > http://lists.xensource.com/xen-devel_______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
Andrew Lyon
2008-Dec-26 17:33 UTC
Re: [Xen-devel] [PATCH 0/4] dom0 linux: Reserve device for guest with device path
On Fri, Dec 26, 2008 at 4:28 AM, Yuji Shimada <shimada-yxb@necst.nec.co.jp> wrote:> Please find attached a example script to convert SBDF to device path. > > The script can be executed as follows. > > # chmod 755 device_path.py > # device_path.py 07:00.0 > PNP0A03:100-1c.1-00.0When I run this script it fails because /sys/firmware/acpi/namespace/ is missing, I have checked kernel options and I cannot see why it is not here, do you have any suggestion as to what I need to enable? I am using 2.6.27. andy> > I will take a vacation from 27 Dec. to 4 Jan. I will not be able to > respond to a mail. > > Thanks, > -- > Yuji Shimada > > On Thu, 25 Dec 2008 16:08:01 +0900 > Yuji Shimada <shimada-yxb@necst.nec.co.jp> wrote: > >> This series of patches add the function to dom0 linux to reserve PCI >> device for guest domain with device path. Following is example of device >> path. >> >> PNP0A03:100-1c.1-00.0 >> >> >> Currently if we assign PCI device to guest domain, we have to specify >> PCI device with "pciback.hide=" boot parameter. If PCI device has small >> memory resource and BIOS does not assign page-aligned memory resource, >> we have to specify PCI device with "reassigndev=" boot parameter also. >> >> "pciback.hide=" and "reassigndev=" use SBDF(Segment#, Bus#, Device#, >> Function#). Segment# and Bus# can be changed at boot time. So they are >> not suitable for specifying PCI device at boot time. >> >> >> My patches integrate "pciback.hide=" and "reassigndev=" into one >> "guestdev=" boot parameter. So we have to specify only one boot >> parameter. The format of device path is following. >> >> <hid>[:<uid>]-<dev>.<func>[-<dev>.<func>[...]] >> >> Device path is not changed at boot time. So it is suitable for >> specifying PCI device at boot time. >> >> >> My patches add "reassign_resources" boot parameter too. If reassignment >> is needed, please set it. >> >> >> Following is example of dom0 linux''s boot parameter. >> >> reassign_resources guestdev=PNP0A03:100-1c.1-00.0,PNP0A03:100-1d.7 >> >> >> The series consists of following patches. >> >> 1. Expose HID,UID,SEG,BBN of PCI root bridge via sysfs. >> 2. Add "guestdev=" boot parameter. >> 3. Bind PCI back driver to PCI device specified by "guestdev=". >> 4. Cleanup function name relating resource reassignment. >> >> >> I will take a vacation from 27 Dec. to 4 Jan. I will not be able to >> respond to a mail. >> >> Thanks, >> -- >> Yuji Shimada. >> >> >> _______________________________________________ >> Xen-devel mailing list >> Xen-devel@lists.xensource.com >> http://lists.xensource.com/xen-devel > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xensource.com > http://lists.xensource.com/xen-devel > >_______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
Yuji Shimada
2009-Jan-05 06:48 UTC
Re: [Xen-devel] [PATCH 0/4] dom0 linux: Reserve device for guest with device path
On Fri, 26 Dec 2008 17:33:20 +0000 "Andrew Lyon" <andrew.lyon@gmail.com> wrote:> On Fri, Dec 26, 2008 at 4:28 AM, Yuji Shimada > <shimada-yxb@necst.nec.co.jp> wrote: > > Please find attached a example script to convert SBDF to device path. > > > > The script can be executed as follows. > > > > # chmod 755 device_path.py > > # device_path.py 07:00.0 > > PNP0A03:100-1c.1-00.0 > > When I run this script it fails because /sys/firmware/acpi/namespace/ > is missing, I have checked kernel options and I cannot see why it is > not here, do you have any suggestion as to what I need to enable?device_path.py depends on the following patch, and it is for linux-2.6.18-xen.hg. [PATCH 1/4] dom0 linux: Expose HID, UID, SEG, BBN of PCI root bridge via sysfs. Please download the source code from linux-2.6.18-xen.hg, and apply the patch to the code. Then build and install normally, and execute device_path.py on dom0 linux.> I am using 2.6.27.ACPI driver is changed from 2.6.18, and the directory where PCI root bridge resides is changed. 2.6.18: /sys/firmware/acpi/namespace/ACPI/_SB 2.6.27: /sys/bus/acpi/devices I don''t think it is difficult to create the patches for linux-2.6.27-xen.hg. It is easy to make device_path.py support two versions of dom0 linux. Thanks, -- Yuji Shimada> andy > > > > > I will take a vacation from 27 Dec. to 4 Jan. I will not be able to > > respond to a mail. > > > > Thanks, > > -- > > Yuji Shimada > > > > On Thu, 25 Dec 2008 16:08:01 +0900 > > Yuji Shimada <shimada-yxb@necst.nec.co.jp> wrote: > > > >> This series of patches add the function to dom0 linux to reserve PCI > >> device for guest domain with device path. Following is example of device > >> path. > >> > >> PNP0A03:100-1c.1-00.0 > >> > >> > >> Currently if we assign PCI device to guest domain, we have to specify > >> PCI device with "pciback.hide=" boot parameter. If PCI device has small > >> memory resource and BIOS does not assign page-aligned memory resource, > >> we have to specify PCI device with "reassigndev=" boot parameter also. > >> > >> "pciback.hide=" and "reassigndev=" use SBDF(Segment#, Bus#, Device#, > >> Function#). Segment# and Bus# can be changed at boot time. So they are > >> not suitable for specifying PCI device at boot time. > >> > >> > >> My patches integrate "pciback.hide=" and "reassigndev=" into one > >> "guestdev=" boot parameter. So we have to specify only one boot > >> parameter. The format of device path is following. > >> > >> <hid>[:<uid>]-<dev>.<func>[-<dev>.<func>[...]] > >> > >> Device path is not changed at boot time. So it is suitable for > >> specifying PCI device at boot time. > >> > >> > >> My patches add "reassign_resources" boot parameter too. If reassignment > >> is needed, please set it. > >> > >> > >> Following is example of dom0 linux''s boot parameter. > >> > >> reassign_resources guestdev=PNP0A03:100-1c.1-00.0,PNP0A03:100-1d.7 > >> > >> > >> The series consists of following patches. > >> > >> 1. Expose HID,UID,SEG,BBN of PCI root bridge via sysfs. > >> 2. Add "guestdev=" boot parameter. > >> 3. Bind PCI back driver to PCI device specified by "guestdev=". > >> 4. Cleanup function name relating resource reassignment. > >> > >> > >> I will take a vacation from 27 Dec. to 4 Jan. I will not be able to > >> respond to a mail. > >> > >> Thanks, > >> -- > >> Yuji Shimada. > >> > >> > >> _______________________________________________ > >> Xen-devel mailing list > >> Xen-devel@lists.xensource.com > >> http://lists.xensource.com/xen-devel > > _______________________________________________ > > Xen-devel mailing list > > Xen-devel@lists.xensource.com > > http://lists.xensource.com/xen-devel > > > > > > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xensource.com > http://lists.xensource.com/xen-devel_______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel