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陈诚

2007-Sep-30 16:44 UTC

[Xen-devel] Some questions about PCI-passthrough for HVM(Non-IOMMU)

Hello,

         I saw some patches about PCI-passthrough for HVM(non-IOMMU) and I
am interested in it. I want to assign my graphics card(nVidia GeForce
7900GS) to an HVM domain (Vista) in order to run 3D-intensive work(for
example, 3D-games).

         What I want to ask is that is it really possible to pass the
graphics card to HVM domain running Vista now? That is, have anyone ever
successfully passed a modern graphics card to a Vista HVM? Since the
graphics card is a kind of complicated device. Are there any technical
problems with the passthrough of a modern graphics card?

         I have tried the direct-io.hg subtree, but I just can''t boot
the
Vista HVM domain with nativedom=1 option. Xen boots without any problem with
nativedom=1, nativedom_mem=1024M option(here the 1024M memory is reserved
for the HVM) and dom0_mem=800M option(I have 2G RAM totally). But when I
type xm cr vista.hvm to create the HVM domain(note that it is bootable
without the nativedom=1 option), sometimes a disk read error occurs(as
displayed on the HVM screen), sometimes it just appear to be dead locked and
sometimes it says: "Error: Device 768(vbd) could not be connected".
After
the failure of starting the HVM as nativedom, I can''t even start it as
a
normal HVM domain, the symptom will also be dead lock or "Error: Device
768(vbd) could not be connected". If a disk read error occurs during the
boot of the HVM domain, the host''s filesystem will appear to be
inconsistent.

         So there is surely some problems with the nativedom(Neo-1to1) part
in the current diret-io.hg subtree. The author has memtioned that on x86-32,
the memory 0-12M is mapped to 16-28M, and if any devices DMA at 0-12M,
crashes may occur. Is it possible that the dead-lock problem and the
"Device
768(vbd) could not be connected" problem during booting are caused by the
mapping?

         This is just the one part of the problem. Another problem is that
currently I don''t have the driver of my graphics card(nVidia GeForce
7900GS), using lspci command I saw it is the pci device 06:00.0, but there
is no "driver" directory in /sys/bus/pci/device/06:00.0/, when I use
the
PCI=[''06:00.0''] option in the hvm config file, error message
says can''t find
/sys/bus/pci/device/06:00.0/driver. Is it still possible to use pciback to
hide this device and pass it to the HVM domain? I typed "modprobe
pciback"
to insert the pciback module, but I still can''t find any pciback
directory
in /sys/bus and any of its sub-dir. Should I need to compile it directly
into the kernel?

         And finally I want to ask another question, can I assign two usb
devices to two different HVM domains now? If not, any future support about
this issue?

         I am not familiar with the code of the HVM part. I will take a look
at this part and the nativedom patches, but first I want to make sure I am
on the right way.
         Thank you.

ConcreteChen@gmail.com


_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xensource.com
http://lists.xensource.com/xen-devel

陈诚

2007-Sep-30 16:58 UTC

head link

[Xen-devel]Some questions about PCI-passthrough for HVM(Non-IOMMU)

Hello,

         I saw some patches about PCI-passthrough for HVM(non-IOMMU) and I
am interested in it. I want to assign my graphics card(nVidia GeForce
7900GS) to an HVM domain (Vista) in order to run 3D-intensive work(for
example, 3D-games).

         What I want to ask is that is it really possible to pass the
graphics card to HVM domain running Vista now? That is, have anyone ever
successfully passed a modern graphics card to a Vista HVM? Since the
graphics card is a kind of complicated device. Are there any technical
problems with the passthrough of a modern graphics card?

         I have tried the direct-io.hg subtree, but I just can''t boot
the
Vista HVM domain with nativedom=1 option. Xen boots without any problem with
nativedom=1, nativedom_mem=1024M option(here the 1024M memory is reserved
for the HVM) and dom0_mem=800M option(I have 2G RAM totally). But when I
type xm cr vista.hvm to create the HVM domain(note that it is bootable
without the nativedom=1 option), sometimes a disk read error occurs(as
displayed on the HVM screen), sometimes it just appear to be dead locked and
sometimes it says: "Error: Device 768(vbd) could not be connected".
After
the failure of starting the HVM as nativedom, I can''t even start it as
a
normal HVM domain, the symptom will also be dead lock or "Error: Device
768(vbd) could not be connected". If a disk read error occurs during the
boot of the HVM domain, the host''s filesystem will appear to be
inconsistent.

         So there is surely some problems with the nativedom(Neo-1to1) part
in the current diret-io.hg subtree. The author has memtioned that on x86-32,
the memory 0-12M is mapped to 16-28M, and if any devices DMA at 0-12M,
crashes may occur. Is it possible that the dead-lock problem and the
"Device
768(vbd) could not be connected" problem during booting are caused by the
mapping?

         This is just the one part of the problem. Another problem is that
currently I don''t have the driver of my graphics card(nVidia GeForce
7900GS), using lspci command I saw it is the pci device 06: 00.0, but there
is no "driver" directory in /sys/bus/pci/device/06:00.0/, when I use
the
PCI=[''06:00.0''] option in the hvm config file, error message
says can''t find
/sys/bus/pci/device/06:00.0/driver. Is it still possible to use pciback to
hide this device and pass it to the HVM domain? I typed "modprobe
pciback"
to insert the pciback module, but I still can''t find any pciback
directory
in /sys/bus and any of its sub-dir. Should I need to compile it directly
into the kernel?

         And finally I want to ask another question, can I assign two usb
devices to two different HVM domains now? If not, any future support about
this issue?

         I am not familiar with the code of the HVM part. I will take a look
at this part and the nativedom patches, but first I want to make sure I am
on the right way.
         Thank you.

ConcreteChen@gmail.com


_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xensource.com
http://lists.xensource.com/xen-devel

陈诚

2007-Sep-30 17:07 UTC

head link

[Xen-users]Some questions about PCI-passthrough for HVM(Non-IOMMU)

Hello,

         I saw some patches about PCI-passthrough for HVM(non-IOMMU) and I
am interested in it. I want to assign my graphics card(nVidia GeForce
7900GS) to an HVM domain (Vista) in order to run 3D-intensive work(for
example, 3D-games).

         What I want to ask is that is it really possible to pass the
graphics card to HVM domain running Vista now? That is, have anyone ever
successfully passed a modern graphics card to a Vista HVM? Since the
graphics card is a kind of complicated device. Are there any technical
problems with the passthrough of a modern graphics card?

         I have tried the direct-io.hg subtree, but I just can''t boot
the
Vista HVM domain with nativedom=1 option. Xen boots without any problem with
nativedom=1, nativedom_mem=1024M option(here the 1024M memory is reserved
for the HVM) and dom0_mem=800M option(I have 2G RAM totally). But when I
type xm cr vista.hvm to create the HVM domain(note that it is bootable
without the nativedom=1 option), sometimes a disk read error occurs(as
displayed on the HVM screen), sometimes it just appear to be dead locked and
sometimes it says: "Error: Device 768(vbd) could not be connected".
After
the failure of starting the HVM as nativedom, I can''t even start it as
a
normal HVM domain, the symptom will also be dead lock or "Error: Device
768(vbd) could not be connected". If a disk read error occurs during the
boot of the HVM domain, the host''s filesystem will appear to be
inconsistent.

         So there is surely some problems with the nativedom(Neo-1to1) part
in the current diret-io.hg subtree. The author has memtioned that on x86-32,
the memory 0-12M is mapped to 16-28M, and if any devices DMA at 0-12M,
crashes may occur. Is it possible that the dead-lock problem and the
"Device
768(vbd) could not be connected" problem during booting are caused by the
mapping?

         This is just the one part of the problem. Another problem is that
currently I don''t have the driver of my graphics card(nVidia GeForce
7900GS), using lspci command I saw it is the pci device 06:00.0, but there
is no "driver" directory in /sys/bus/pci/device/06:00.0/, when I use
the
PCI=[''06:00.0''] option in the hvm config file, error message
says can''t find
/sys/bus/pci/device/06:00.0/driver. Is it still possible to use pciback to
hide this device and pass it to the HVM domain? I typed "modprobe
pciback"
to insert the pciback module, but I still can''t find any pciback
directory
in /sys/bus and any of its sub-dir. Should I need to compile it directly
into the kernel?

         And finally I want to ask another question, can I assign two usb
devices to two different HVM domains now? If not, any future support about
this issue?

         I am not familiar with the code of the HVM part. I will take a look
at this part and the nativedom patches, but first I want to make sure I am
on the right way.
         Thank you.

ConcreteChen@gmail.com


_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users

陈诚

2007-Oct-01 04:26 UTC

head link

[Xen-devel] Some questions about PCI-passthrough for HVM(Non-IOMMU)

Hello,
        I saw some patches about PCI-passthrough for HVM(non-IOMMU)
and I am interested in it. I want to assign my graphics card(nVidia
GeForce 7900GS) to an HVM domain (Vista) in order to run 3D-intensive
work(for example, 3D-games).
        What I want to ask is that is it really possible to pass the
graphics card to HVM domain running Vista now? That is, have anyone
ever successfully passed a modern graphics card to a Vista HVM? Since
the graphics card is a kind of complicated device. Are there any
technical problems with the passthrough of a modern graphics card?
        I have tried the direct-io.hg subtree, but I just can''t boot
the Vista HVM domain with nativedom=1 option. Xen boots without any
problem with nativedom=1, nativedom_mem=1024M option(here the 1024M
memory is reserved for the HVM) and dom0_mem=800M option(I have 2G RAM
totally). But when I type xm cr vista.hvm to create the HVM
domain(note that it is bootable without the nativedom=1 option),
sometimes a disk read error occurs(as displayed on the HVM screen),
sometimes it just appear to be dead locked and sometimes it says:
"Error: Device 768(vbd) could not be connected". After the failure of
starting the HVM as nativedom, I can''t even start it as a normal HVM
domain, the symptom will also be dead lock or "Error: Device 768(vbd)
could not be connected". If a disk read error occurs during the boot
of the HVM domain, the host''s filesystem will appear to be
inconsistent.
        So there is surely some problems with the nativedom(Neo-1to1)
part in the current diret-io.hg subtree. The author has memtioned that
on x86-32, the memory 0-12M is mapped to 16-28M, and if any devices
DMA at 0-12M, crashes may occur. Is it possible that the dead-lock
problem and the "Device 768(vbd) could not be connected" problem
during booting are caused by the mapping?
        This is just the one part of the problem. Another problem is
that currently I don''t have the driver of my graphics card(nVidia
GeForce 7900GS), using lspci command I saw it is the pci device
06:00.0, but there is no "driver" directory in
/sys/bus/pci/device/06:00.0/, when I use the PCI=[''06:00.0'']
option in
the hvm config file, error message says can''t find
/sys/bus/pci/device/06:00.0/driver. Is it still possible to use
pciback to hide this device and pass it to the HVM domain? I typed
"modprobe pciback" to insert the pciback module, but I still
can''t
find any pciback directory in /sys/bus and any of its sub-dir. Should
I need to compile it directly into the kernel?
        And finally I want to ask another question, can I assign two
usb devices to two different HVM domains now? If not, any future
support about this issue?
        I am not familiar with the code of the HVM part. I will take a
look at this part and the nativedom patches, but first I want to make
sure I am on the right way.
        Thank you.

ConcreteChen@gmail.com

_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xensource.com
http://lists.xensource.com/xen-devel

陈诚

2007-Oct-01 05:15 UTC

head link

[Xen-users] Some questions about PCI-passthrough for HVM(Non-IOMMU)

Hello,
        I saw some patches about PCI-passthrough for HVM(non-IOMMU)
and I am interested in it. I want to assign my graphics card(nVidia
GeForce 7900GS) to an
HVM domain (Vista) in order to run 3D-intensive work(for example, 3D-games).
What I want to ask is that is it really possible to pass the graphics
card to HVM domain running Vista now? That is, have anyone ever
successfully

passed a modern graphics card to a Vista HVM? Since the graphics card
is a kind of complicated device. Are there any technical problems with
the passthrough

of a modern graphics card?
	I have tried the direct-io.hg subtree, but I just can''t boot the
Vista HVM domain with nativedom=1 option. Xen boots without any
problem with

nativedom=1, nativedom_mem=1024M option(here the 1024M memory is
reserved for the HVM) and dom0_mem=800M option(I have 2G RAM totally).
But when I type xm cr

vista.hvm to create the HVM domain(note that it is bootable without
the nativedom=1 option), sometimes a disk read error occurs(as
displayed on the HVM

screen), sometimes it just appear to be dead locked and sometimes it
says: "Error: Device 768(vbd) could not be connected". After the
failure of starting the

HVM as nativedom, I can''t even start it as a normal HVM domain, the
symptom will also be dead lock or "Error: Device 768(vbd) could not be
connected". If a

disk read error occurs during the boot of the HVM domain, the host''s
filesystem will appear to be inconsistent.
	So there is surely some problems with the nativedom(Neo-1to1) part in
the current diret-io.hg subtree. The author has memtioned that on
x86-32, the

memory 0-12M is mapped to 16-28M, and if any devices DMA at 0-12M,
crashes may occur. Is it possible that the dead-lock problem and the
"Device 768(vbd)

could not be connected" problem during booting are caused by the mapping?
	This is just the one part of the problem. Another problem is that
currently I don''t have the driver of my graphics card(nVidia GeForce
7900GS), using

lspci command I saw it is the pci device 06:00.0, but there is no
"driver" directory in /sys/bus/pci/device/06:00.0/, when I use the
PCI=[''06:00.0''] option

in the hvm config file, error message says can''t find
/sys/bus/pci/device/06:00.0/driver. Is it still possible to use
pciback to hide this device and pass it

to the HVM domain? I typed "modprobe pciback" to insert the pciback
module, but I still can''t find any pciback directory in /sys/bus and
any of its sub-dir.

Should I need to compile it directly into the kernel?
	And finally I want to ask another question, can I assign two usb
devices to two different HVM domains now? If not, any future support
about this

issue?
	I am not familiar with the code of the HVM part. I will take a look
at this part and the nativedom patches, but first I want to make sure
I am on the

right way.
	Thank you.

_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users

Henning Sprang

2007-Oct-02 12:14 UTC

head link

Re: [Xen-users] Some questions about PCI-passthrough for HVM(Non-IOMMU)

陈诚 wrote:> Hello,
>         I saw some patches about PCI-passthrough for HVM(non-IOMMU)
> and I am interested in it. I want to assign my graphics card(nVidia
> GeForce 7900GS) to an
> HVM domain (Vista) in order to run 3D-intensive work(for example,
3D-games).
> What I want to ask is that is it really possible to pass the graphics
> card to HVM domain running Vista now? That is, have anyone ever
> successfully
> 
> passed a modern graphics card to a Vista HVM? Since the graphics card
> is a kind of complicated device. Are there any technical problems with
> the passthrough
> 
> of a modern graphics card?
I tried that once and fiddled around with it, but wasn''t really
successfull (long time ago, can''t remember the exact problems).

I''m not sure anymore, if I tried with a machine with one or two cards.

Sure, you have to hide the PCI/AGP port from the dom0 - with using one
card only, this means you have _no_ graphics output and you have to run
headless.
So, having two cards might make it easier, but I don''t know if
it''s even
possible at all.

Henning

_______________________________________________
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Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users

陈诚

2007-Oct-02 15:17 UTC

head link

Re: [Xen-users] Some questions about PCI-passthrough for HVM(Non-IOMMU)

2007/10/2, Henning Sprang <henning_sprang@gmx.de>:> 陈诚 wrote:
> > Hello,
> >         I saw some patches about PCI-passthrough for HVM(non-IOMMU)
> > and I am interested in it. I want to assign my graphics card(nVidia
> > GeForce 7900GS) to an
> > HVM domain (Vista) in order to run 3D-intensive work(for example,
3D-games).
> > What I want to ask is that is it really possible to pass the graphics
> > card to HVM domain running Vista now? That is, have anyone ever
> > successfully
> >
> > passed a modern graphics card to a Vista HVM? Since the graphics card
> > is a kind of complicated device. Are there any technical problems with
> > the passthrough
> >
> > of a modern graphics card?
>
> I tried that once and fiddled around with it, but wasn't really
> successfull (long time ago, can't remember the exact problems).
>
> I'm not sure anymore, if I tried with a machine with one or two cards.
>
> Sure, you have to hide the PCI/AGP port from the dom0 - with using one
> card only, this means you have _no_ graphics output and you have to run
> headless.
> So, having two cards might make it easier, but I don't know if it's
even
> possible at all.
>
> Henning
>
I think the problem is really caused by the 0-12M remapping on x86-32.
It even corrupted my ext3 file system once. The SATA controller seems
allocating DMA buffers in that area. I am examing the code and trying
to make this problem clear.
I tried to hide the graphics card on a machine with one graphics card,
but it was unseccessful, after the pciback binding(in the
/etc/rc.local, it happens after the last service started), the screen
stopped reacting and stayed there forever. I also tried to pass the
pci NIC, this time it works. But since the nativedom can't boot, I
still can't see the passthrough effect.

ConcreteChen@gmail.com

_______________________________________________
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Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users

Wiwida h

2007-Oct-04 08:06 UTC

head link

Re: [Xen-devel] Some questions about PCI-passthrough for HVM(Non-IOMMU)

Graphic card direct assignment is sort of difficult and troublesome, as we
have to deal with the VGA BIOS.

2007/10/1, 陈诚 <concretechen@gmail.com>:>
> Hello,
>        I saw some patches about PCI-passthrough for HVM(non-IOMMU)
> and I am interested in it. I want to assign my graphics card(nVidia
> GeForce 7900GS) to an HVM domain (Vista) in order to run 3D-intensive
> work(for example, 3D-games).
>        What I want to ask is that is it really possible to pass the
> graphics card to HVM domain running Vista now? That is, have anyone
> ever successfully passed a modern graphics card to a Vista HVM? Since
> the graphics card is a kind of complicated device. Are there any
> technical problems with the passthrough of a modern graphics card?
>        I have tried the direct-io.hg subtree, but I just can't boot
> the Vista HVM domain with nativedom=1 option. Xen boots without any
> problem with nativedom=1, nativedom_mem=1024M option(here the 1024M
> memory is reserved for the HVM) and dom0_mem=800M option(I have 2G RAM
> totally). But when I type xm cr vista.hvm to create the HVM
> domain(note that it is bootable without the nativedom=1 option),
> sometimes a disk read error occurs(as displayed on the HVM screen),
> sometimes it just appear to be dead locked and sometimes it says:
> "Error: Device 768(vbd) could not be connected". After the
failure of
> starting the HVM as nativedom, I can't even start it as a normal HVM
> domain, the symptom will also be dead lock or "Error: Device 768(vbd)
> could not be connected". If a disk read error occurs during the boot
> of the HVM domain, the host's filesystem will appear to be
> inconsistent.
>        So there is surely some problems with the nativedom(Neo-1to1)
> part in the current diret-io.hg subtree. The author has memtioned that
> on x86-32, the memory 0-12M is mapped to 16-28M, and if any devices
> DMA at 0-12M, crashes may occur. Is it possible that the dead-lock
> problem and the "Device 768(vbd) could not be connected" problem
> during booting are caused by the mapping?
>        This is just the one part of the problem. Another problem is
> that currently I don't have the driver of my graphics card(nVidia
> GeForce 7900GS), using lspci command I saw it is the pci device
> 06:00.0, but there is no "driver" directory in
> /sys/bus/pci/device/06:00.0/, when I use the PCI=['06:00.0'] option
in
> the hvm config file, error message says can't find
> /sys/bus/pci/device/06:00.0/driver. Is it still possible to use
> pciback to hide this device and pass it to the HVM domain? I typed
> "modprobe pciback" to insert the pciback module, but I still
can't
> find any pciback directory in /sys/bus and any of its sub-dir. Should
> I need to compile it directly into the kernel?
>        And finally I want to ask another question, can I assign two
> usb devices to two different HVM domains now? If not, any future
> support about this issue?
>        I am not familiar with the code of the HVM part. I will take a
> look at this part and the nativedom patches, but first I want to make
> sure I am on the right way.
>        Thank you.
>
> ConcreteChen@gmail.com
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel
>

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