On Wed, 2007-11-14 at 14:55 -0700, Grant Grundler wrote:
> Ah ok.. I was assuming there was only a "Hypervisor" and all the "guests"
> were equal. If one OS instance is "Host" and can see the device before hand,
> then yeah, it makes sense to "hide" the device from the normal device drivers.
On Wed, Nov 14, 2007 at 07:16:18PM +1100, Benjamin Herrenschmidt wrote:
> > We already have that "something": pci_enable_device().
> > The guest OS "Arch" code can then do the reassignment.
> > See "3.1 Enable the PCI device" in Documentation/pci.txt.
>
> No, that can't be done there because that
On Tue, 2007-11-13 at 23:21 -0700, Grant Grundler wrote:
>
> > So something like your hypervisor binds a special driver to a device
> > that is to be reflected to a partition, at which point we are sure
> no
> > other driver is using it, then that driver can call something in the
> pci
> > layer
On Tue, 2007-11-13 at 23:21 -0700, Grant Grundler wrote:
So something like your hypervisor binds a special driver to a device
that is to be reflected to a partition, at which point we are sure
no
other driver is using it, then that driver can call something in the
pci
layer that
On Wed, Nov 14, 2007 at 07:16:18PM +1100, Benjamin Herrenschmidt wrote:
We already have that something: pci_enable_device().
The guest OS Arch code can then do the reassignment.
See 3.1 Enable the PCI device in Documentation/pci.txt.
No, that can't be done there because that would mean
On Wed, 2007-11-14 at 14:55 -0700, Grant Grundler wrote:
Ah ok.. I was assuming there was only a Hypervisor and all the guests
were equal. If one OS instance is Host and can see the device before hand,
then yeah, it makes sense to hide the device from the normal device drivers.
The Host is
On Wed, Nov 14, 2007 at 08:17:33AM +1100, Benjamin Herrenschmidt wrote:
...
> Though he's trying to fix a real issue, his patch is not the right
> approach imho.
>
> A better approach would be to have a mechanism to be triggered by the
> hypervisor administration tools that will attempt to
On Sun, 2007-10-28 at 18:08 -0700, David Miller wrote:
> From: Greg KH <[EMAIL PROTECTED]>
> Date: Sun, 28 Oct 2007 13:03:36 -0700
>
> > But doesn't aligning such regions on that alignment break some devices
> > as that is not what the device is asking for in the BIOS?
>
> There are also
On Sun, 2007-10-28 at 18:08 -0700, David Miller wrote:
From: Greg KH [EMAIL PROTECTED]
Date: Sun, 28 Oct 2007 13:03:36 -0700
But doesn't aligning such regions on that alignment break some devices
as that is not what the device is asking for in the BIOS?
There are also platforms where
On Wed, Nov 14, 2007 at 08:17:33AM +1100, Benjamin Herrenschmidt wrote:
...
Though he's trying to fix a real issue, his patch is not the right
approach imho.
A better approach would be to have a mechanism to be triggered by the
hypervisor administration tools that will attempt to reassign
On Thu, Nov 08, 2007 at 05:24:00PM -0600, Linas Vepstas wrote:
...
> > E.g. 4 port Gige card could directly support the host and 3 guests with
> > somewhat
> > lower risk of tromping on each other's MMIO space.
> >
> > If Xen is cooperative, this seems a bit paranoid. I don't recall ever
> >
On Thu, Nov 08, 2007 at 05:24:00PM -0600, Linas Vepstas wrote:
...
E.g. 4 port Gige card could directly support the host and 3 guests with
somewhat
lower risk of tromping on each other's MMIO space.
If Xen is cooperative, this seems a bit paranoid. I don't recall ever
seeing a
On Sun, Oct 28, 2007 at 11:52:16PM -0600, Grant Grundler wrote:
> > On Sun, Oct 28, 2007 at 03:53:20PM -0400, Barak Fargoun wrote:
> ...
> > > About your question: today, some of the hypervisors are using linux
> > > kernel as their domain-0 (e.g. Xen). In order to implement direct
> > > hardware
On Sun, Oct 28, 2007 at 11:52:16PM -0600, Grant Grundler wrote:
On Sun, Oct 28, 2007 at 03:53:20PM -0400, Barak Fargoun wrote:
...
About your question: today, some of the hypervisors are using linux
kernel as their domain-0 (e.g. Xen). In order to implement direct
hardware access for
On Sun, Oct 28, 2007 at 01:03:36PM -0700, Greg KH wrote:
> On Sun, Oct 28, 2007 at 03:53:20PM -0400, Barak Fargoun wrote:
...
> > About your question: today, some of the hypervisors are using linux
> > kernel as their domain-0 (e.g. Xen). In order to implement direct
> > hardware access for these
From: Greg KH <[EMAIL PROTECTED]>
Date: Sun, 28 Oct 2007 13:03:36 -0700
> But doesn't aligning such regions on that alignment break some devices
> as that is not what the device is asking for in the BIOS?
There are also platforms where bootup firmware chooses the
allocations, and that is what we
> From: Greg KH [mailto:[EMAIL PROTECTED]
> Sent: Sunday, October 28, 2007 10:04 PM
> To: Barak Fargoun
> Cc: linux-kernel@vger.kernel.org;
> [EMAIL PROTECTED]; Guy Zana
> Subject: Re: [PATCH] Align PCI memory regions to page size (4K) - Fix
>
> On Sun, Oct 28, 2007 at
On Sun, Oct 28, 2007 at 03:53:20PM -0400, Barak Fargoun wrote:
> Hi!
>
> Regarding all the technical stuff (documentation, coding style, etc.) -
> I thought I did it correctly :( I will fix it ASAP,
> and send an update when I will finish it.
>
> About your question: today, some of the
On Sun, 28 Oct 2007 13:27:27 -0400
"Barak Fargoun" <[EMAIL PROTECTED]> wrote:
> Sorry, my mail client corrupted the previous mail containing the
> patch... it should be ok now...
>
> Add a boot parameter (‘pci-mem-align’) which forces PCI memory
> regions to be aligned to 4K.
>
> This is very
: Sunday, October 28, 2007 21:31 PM
To: Barak Fargoun
Cc: linux-kernel@vger.kernel.org; [EMAIL PROTECTED];
Guy Zana
Subject: Re: [PATCH] Align PCI memory regions to page size (4K) - Fix
On Sun, Oct 28, 2007 at 01:27:27PM -0400, Barak Fargoun wrote:
> Sorry, my mail client corrupted the previ
On Sun, Oct 28, 2007 at 01:27:27PM -0400, Barak Fargoun wrote:
> Sorry, my mail client corrupted the previous mail containing the patch... it
> should be ok now...
>
> Add a boot parameter (?pci-mem-align?) which forces PCI memory regions
> to be aligned to 4K.
>
> This is very useful when
Sorry, my mail client corrupted the previous mail containing the patch... it
should be ok now...
Add a boot parameter (‘pci-mem-align’) which forces PCI memory regions to be
aligned to 4K.
This is very useful when developing an hypervisor, since in case we want to let
native domains direct
Sorry, my mail client corrupted the previous mail containing the patch... it
should be ok now...
Add a boot parameter (‘pci-mem-align’) which forces PCI memory regions to be
aligned to 4K.
This is very useful when developing an hypervisor, since in case we want to let
native domains direct
On Sun, Oct 28, 2007 at 01:27:27PM -0400, Barak Fargoun wrote:
Sorry, my mail client corrupted the previous mail containing the patch... it
should be ok now...
Add a boot parameter (?pci-mem-align?) which forces PCI memory regions
to be aligned to 4K.
This is very useful when developing
: Sunday, October 28, 2007 21:31 PM
To: Barak Fargoun
Cc: linux-kernel@vger.kernel.org; [EMAIL PROTECTED];
Guy Zana
Subject: Re: [PATCH] Align PCI memory regions to page size (4K) - Fix
On Sun, Oct 28, 2007 at 01:27:27PM -0400, Barak Fargoun wrote:
Sorry, my mail client corrupted the previous mail
On Sun, 28 Oct 2007 13:27:27 -0400
Barak Fargoun [EMAIL PROTECTED] wrote:
Sorry, my mail client corrupted the previous mail containing the
patch... it should be ok now...
Add a boot parameter (‘pci-mem-align’) which forces PCI memory
regions to be aligned to 4K.
This is very useful when
On Sun, Oct 28, 2007 at 03:53:20PM -0400, Barak Fargoun wrote:
Hi!
Regarding all the technical stuff (documentation, coding style, etc.) -
I thought I did it correctly :( I will fix it ASAP,
and send an update when I will finish it.
About your question: today, some of the hypervisors are
From: Greg KH [mailto:[EMAIL PROTECTED]
Sent: Sunday, October 28, 2007 10:04 PM
To: Barak Fargoun
Cc: linux-kernel@vger.kernel.org;
[EMAIL PROTECTED]; Guy Zana
Subject: Re: [PATCH] Align PCI memory regions to page size (4K) - Fix
On Sun, Oct 28, 2007 at 03:53:20PM -0400, Barak Fargoun
From: Greg KH [EMAIL PROTECTED]
Date: Sun, 28 Oct 2007 13:03:36 -0700
But doesn't aligning such regions on that alignment break some devices
as that is not what the device is asking for in the BIOS?
There are also platforms where bootup firmware chooses the
allocations, and that is what we use
On Sun, Oct 28, 2007 at 01:03:36PM -0700, Greg KH wrote:
On Sun, Oct 28, 2007 at 03:53:20PM -0400, Barak Fargoun wrote:
...
About your question: today, some of the hypervisors are using linux
kernel as their domain-0 (e.g. Xen). In order to implement direct
hardware access for these native
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