[Qemu-devel] PPC emulation on Qemu

[Qemu-devel] PPC emulation on Qemu

[Manish Bansal]

Hi,
  How do we boot a PPC OS using Qemu? Do we need a separate BIOS ROM file for 
that? Can we boot Mac OS X on it.

Thanks,
Manish.

Re: [Qemu-devel] PPC emulation on Qemu

[J. Mayer]

On Sun, 2004-02-15 at 12:17, Manish Bansal wrote:
> Hi,
>   How do we boot a PPC OS using Qemu? Do we need a separate BIOS ROM file for 
> that? Can we boot Mac OS X on it.

Hello,
We can't boot any PPC OS with qemu for now.
The first OS targeted is Linux, MacOS will come next. We'll need more
emulated devices, including PCI devices to make it run. Then, the good
way would be to have an open-soure BIOS, the way it's done for x86
target.
I'm sorry you'll have to be patient...

-- 
J. Mayer <l_indien@magic.fr>
Never organized

Re: [Qemu-devel] PPC emulation on Qemu

[Gabriel Ebner]

Hello,

Am Son, den 15.02.2004 schrieb J. Mayer um 15:07:
> We can't boot any PPC OS with qemu for now.
> I'm sorry you'll have to be patient...

I have heard on this list that you're working on that, the website says
that PPC system emulation is in development, but I couldn't find any
code in qemu CVS.

Just curious, but is there already any code?

	Gabriel.

Re: [Qemu-devel] PPC emulation on Qemu

[J. Mayer]

On Sun, 2004-02-15 at 15:59, Gabriel Ebner wrote:
> Hello,
> 
> Am Son, den 15.02.2004 schrieb J. Mayer um 15:07:
> > We can't boot any PPC OS with qemu for now.
> > I'm sorry you'll have to be patient...
> 
> I have heard on this list that you're working on that, the website says
> that PPC system emulation is in development, but I couldn't find any
> code in qemu CVS.
> 
> Just curious, but is there already any code?

The code to emulate supervisor mode and MMU is mostly commited. But the
code to handle peripherals, emulate open-firmware (which is a poor
approch, but...) and really launch a linux kernel isn't really usable
for now.

-- 
J. Mayer <l_indien@magic.fr>
Never organized

Re: [Qemu-devel] PPC emulation on Qemu

[Benjamin Herrenschmidt]

On Mon, 2004-02-16 at 03:06, J. Mayer wrote:
> On Sun, 2004-02-15 at 15:59, Gabriel Ebner wrote:
> > Hello,
> > 
> > Am Son, den 15.02.2004 schrieb J. Mayer um 15:07:
> > > We can't boot any PPC OS with qemu for now.
> > > I'm sorry you'll have to be patient...
> > 
> > I have heard on this list that you're working on that, the website says
> > that PPC system emulation is in development, but I couldn't find any
> > code in qemu CVS.
> > 
> > Just curious, but is there already any code?
> 
> The code to emulate supervisor mode and MMU is mostly commited. But the
> code to handle peripherals, emulate open-firmware (which is a poor
> approch, but...) and really launch a linux kernel isn't really usable
> for now.

Did you use some of MOL's code ? (MacOnLinus contains OF client
interface emulation and some low level Mac hw emulation like interrupt
controller, PCI host bridge, etc...)

Ben.
 

Re: [Qemu-devel] PPC emulation on Qemu

[J. Mayer]

On Sun, 2004-02-15 at 23:44, Benjamin Herrenschmidt wrote:
> On Mon, 2004-02-16 at 03:06, J. Mayer wrote:
> > On Sun, 2004-02-15 at 15:59, Gabriel Ebner wrote:
> > > Hello,
> > > 
> > > Am Son, den 15.02.2004 schrieb J. Mayer um 15:07:
> > > > We can't boot any PPC OS with qemu for now.
> > > > I'm sorry you'll have to be patient...
> > > 
> > > I have heard on this list that you're working on that, the website says
> > > that PPC system emulation is in development, but I couldn't find any
> > > code in qemu CVS.
> > > 
> > > Just curious, but is there already any code?
> > 
> > The code to emulate supervisor mode and MMU is mostly commited. But the
> > code to handle peripherals, emulate open-firmware (which is a poor
> > approch, but...) and really launch a linux kernel isn't really usable
> > for now.
> 
> Did you use some of MOL's code ? (MacOnLinus contains OF client
> interface emulation and some low level Mac hw emulation like interrupt
> controller, PCI host bridge, etc...)

Well, I did look a lot MOL code but didn't use it for now. I won't reuse
MOL OF code, because I don't want to have hardcoded stuffs, but
something that acts really like the open-firmware and will be able to
boot any OS, just like Bochs BIOS does for PC's.
But emulated hardware from MOL will be helpfull someday. For now, I want
to concentrate on booting Linux for Prep hardware. Because it's mainly a
PC with a PPC CPU, it's a real good target to debug CPU emulation
problems without taking care of emulated hardware. Then, I want a
standard and nowedays PPC platform, not only Macs, near OpenPPC
standard. So I did an open-pic emulation, ... MOL code will be helpfull
to emulate some Mac platforms, but as it says, it seems to me that's
it's too much Mac & MacOS dedicated to help until I got full stable
basics.

-- 
J. Mayer <l_indien@magic.fr>
Never organized

Re: [Qemu-devel] PPC emulation on Qemu

[Benjamin Herrenschmidt]

> Well, I did look a lot MOL code but didn't use it for now. I won't reuse
> MOL OF code, because I don't want to have hardcoded stuffs, but
> something that acts really like the open-firmware and will be able to
> boot any OS, just like Bochs BIOS does for PC's.

Latest "devel" tree from Samuel started integrating OpenBIOS in MOL
(that is a full OF implementation).

> But emulated hardware from MOL will be helpfull someday. For now, I want
> to concentrate on booting Linux for Prep hardware. Because it's mainly a
> PC with a PPC CPU, it's a real good target to debug CPU emulation
> problems without taking care of emulated hardware.

It's also the shitties PPC hardware out there ;) Instane memory map

> Then, I want a standard and nowedays PPC platform, not only Macs, nea
> OpenPPC standard.

What is OpenPPC standard ? So far, the most "standard" PPCs are
PowerMacs ;) 

> So I did an open-pic emulation, ... MOL code will be helpfull
> to emulate some Mac platforms, but as it says, it seems to me that's
> it's too much Mac & MacOS dedicated to help until I got full stable
> basics.

It can run the linux kernel as well. It's oriented toward emulation
speed though. It has this nice "OSI" calls mecanism that allows
cross call from within the emulated environment to the emulator
linux-side. That along with host-side drivers using these calls
allows significant perfs. improvements for things like disk
access, sound, etc... but that's all optional.

Ben

Re: [Qemu-devel] PPC emulation on Qemu

[J. Mayer]

On Mon, 2004-02-16 at 05:08, Benjamin Herrenschmidt wrote:
> > Well, I did look a lot MOL code but didn't use it for now. I won't reuse
> > MOL OF code, because I don't want to have hardcoded stuffs, but
> > something that acts really like the open-firmware and will be able to
> > boot any OS, just like Bochs BIOS does for PC's.
> 
> Latest "devel" tree from Samuel started integrating OpenBIOS in MOL
> (that is a full OF implementation).

OpenBios would be great, but it seems to be far from running. I got
something nearly running, in host environment. But if OpenBios gets
close to a full real Bios, I'd be glad to use it !

> > But emulated hardware from MOL will be helpfull someday. For now, I want
> > to concentrate on booting Linux for Prep hardware. Because it's mainly a
> > PC with a PPC CPU, it's a real good target to debug CPU emulation
> > problems without taking care of emulated hardware.
> 
> It's also the shitties PPC hardware out there ;) Instane memory map

Yes, I know it's nearly a virtual platform, but, has I have some tests
kernels that should run on it, it makes debug simpler. But I agree this
emulation is just a step to a real complete hardware emulation...

> > Then, I want a standard and nowedays PPC platform, not only Macs, nea
> > OpenPPC standard.
> 
> What is OpenPPC standard ? So far, the most "standard" PPCs are
> PowerMacs ;) 

Well, G4 Macs are close to OpenPPC standard, which is an open platform
which has been described by IBM. I like it has a reference because it's
nearly Macs and because AIX, MacOS (X I suppose) and Linux should be
able to run on it.

> > So I did an open-pic emulation, ... MOL code will be helpfull
> > to emulate some Mac platforms, but as it says, it seems to me that's
> > it's too much Mac & MacOS dedicated to help until I got full stable
> > basics.
> 
> It can run the linux kernel as well. It's oriented toward emulation
> speed though. It has this nice "OSI" calls mecanism that allows
> cross call from within the emulated environment to the emulator
> linux-side. That along with host-side drivers using these calls
> allows significant perfs. improvements for things like disk
> access, sound, etc... but that's all optional.

Yes I know it can run Linux, but what I wanted to point is that (if I'm
not wrong) it's not able to run any OS (ie AIX or pegasos or, why not
(?), BeOS or AmigaOS) like a real machine would.
I agree that MOL exactly intend to do this, and does it well, but I
think qemu should really emulate the whole execution environment...

Does the OSI calls mechanism needs patched OS and/or firmware ?

-- 
J. Mayer <l_indien@magic.fr>
Never organized

Re: [Qemu-devel] PPC emulation on Qemu

[Benjamin Herrenschmidt]

> > What is OpenPPC standard ? So far, the most "standard" PPCs are
> > PowerMacs ;) 
> 
> Well, G4 Macs are close to OpenPPC standard, which is an open platform
> which has been described by IBM. I like it has a reference because it's
> nearly Macs and because AIX, MacOS (X I suppose) and Linux should be
> able to run on it.

You mean CHRP ? Hrm... AIX ? hehe, I wouldn't bet on that :) OS X
neither. But at least for OS X, you can write your own drivers,
like MOL does.

> Yes I know it can run Linux, but what I wanted to point is that (if I'm
> not wrong) it's not able to run any OS (ie AIX or pegasos or, why not
> (?), BeOS or AmigaOS) like a real machine would.

It could. All depends on which HW you emulate.

> I agree that MOL exactly intend to do this, and does it well, but I
> think qemu should really emulate the whole execution environment...
> 
> Does the OSI calls mechanism needs patched OS and/or firmware ?

It's an addition. MOL can run without it, it's just an optimisation
so you can load special drivers into the host OS to makes things
much faster / more useable.

On MacOS, it makes a lot of sense since the drivers can be provided
by the bootloader at boot or even in the ROM of some PCI cards, so
MOL can transparently get those loaded into the host operating
system when it's MacOS 9 or X.

Also, for OS X, MOL actually loads a special kext that patches the
kernel to remove it's use of MMU split mode, which isn't necessary
under emulation and actually very slow to emulate.

Ben.

Re: [Qemu-devel] PPC emulation on Qemu

[J. Mayer]

On Mon, 2004-02-16 at 08:09, Benjamin Herrenschmidt wrote:
> > > What is OpenPPC standard ? So far, the most "standard" PPCs are
> > > PowerMacs ;) 
> > 
> > Well, G4 Macs are close to OpenPPC standard, which is an open platform
> > which has been described by IBM. I like it has a reference because it's
> > nearly Macs and because AIX, MacOS (X I suppose) and Linux should be
> > able to run on it.
> 
> You mean CHRP ? Hrm... AIX ? hehe, I wouldn't bet on that :) OS X
> neither. But at least for OS X, you can write your own drivers,
> like MOL does.
> 

No, I meant OpenPPC, but it seems that IBM doesn't promote it anymore:
the pages disapeared from their site.... So maybe it's now another
virtual standard platform :-(

> > Yes I know it can run Linux, but what I wanted to point is that (if I'm
> > not wrong) it's not able to run any OS (ie AIX or pegasos or, why not
> > (?), BeOS or AmigaOS) like a real machine would.
> 
> It could. All depends on which HW you emulate.

Yes, I'd like qemu to be able to emulate the largest combination of
hw... I don't really know if I will ever try to emulate Amiga, but as
the main use of PPC is embedded hardwares, it sounds good to have an
easily "hw" tunable emulator...

> > I agree that MOL exactly intend to do this, and does it well, but I
> > think qemu should really emulate the whole execution environment...
> > 
> > Does the OSI calls mechanism needs patched OS and/or firmware ?
> 
> It's an addition. MOL can run without it, it's just an optimisation
> so you can load special drivers into the host OS to makes things
> much faster / more useable.

All right, it seems to me that you can not always patch the emulated
system for different reasons...

> On MacOS, it makes a lot of sense since the drivers can be provided
> by the bootloader at boot or even in the ROM of some PCI cards, so
> MOL can transparently get those loaded into the host operating
> system when it's MacOS 9 or X.

OK, seems a good way for proceeding.

> Also, for OS X, MOL actually loads a special kext that patches the
> kernel to remove it's use of MMU split mode, which isn't necessary
> under emulation and actually very slow to emulate.

This, I'd like to avoid, as I'd like to keep the system in the state it
is... But I may change my mind.

I just rsync'ed the latest mol, and it appears to me that openbios isn't
inside. It seems that it's only available through proprietary bk
software...
Is there a way to get it using a standard open mechanism (ie rsync or
CVS ?). It would be glad, as I cannot and never want to use any
proprietary software on my linux boxes...

-- 
J. Mayer <l_indien@magic.fr>
Never organized

Re: [Qemu-devel] PPC emulation on Qemu

[J. Fortmann]

> > > Yes I know it can run Linux, but what I wanted to point is that (if
I'm
> > > not wrong) it's not able to run any OS (ie AIX or pegasos or, why not
> > > (?), BeOS or AmigaOS) like a real machine would.
> > 
> > It could. All depends on which HW you emulate.
> 
> Yes, I'd like qemu to be able to emulate the largest combination of
> hw... I don't really know if I will ever try to emulate Amiga, but as
> the main use of PPC is embedded hardwares, it sounds good to have an
> easily "hw" tunable emulator...
> 

Regarding emulation of all PPC systems:
Would it be possible to switch the system to little endian mode inside the 
qemu process? That way, one could run Windows NT, which I always wanted 
to try (but couldn't, because I don't have the necessary hardware).

This could also (with a slightly different approach) bring better speeds for
i386 computations.

> 
> I just rsync'ed the latest mol, and it appears to me that openbios isn't
> inside. It seems that it's only available through proprietary bk
> software...
> Is there a way to get it using a standard open mechanism (ie rsync or
> CVS ?). It would be glad, as I cannot and never want to use any
> proprietary software on my linux boxes...
> 

I had to bite the bullet a month ago and install Bitkeeper (precisely for
MOL),
and I can't say I like it. It's really sad that there seems no other way to
get
up-to-date MOL sources.

J. Fortmann
Lurker

-- 
GMX ProMail (250 MB Mailbox, 50 FreeSMS, Virenschutz, 2,99 EUR/Monat...)
jetzt 3 Monate GRATIS + 3x DER SPIEGEL +++ http://www.gmx.net/derspiegel +++

Re: [Qemu-devel] PPC emulation on Qemu

[Jocelyn Mayer]

On Wed, 2004-02-18 at 11:35, J. Fortmann wrote:
> > > > Yes I know it can run Linux, but what I wanted to point is that (if
> I'm
> > > > not wrong) it's not able to run any OS (ie AIX or pegasos or, why not
> > > > (?), BeOS or AmigaOS) like a real machine would.
> > > 
> > > It could. All depends on which HW you emulate.
> > 
> > Yes, I'd like qemu to be able to emulate the largest combination of
> > hw... I don't really know if I will ever try to emulate Amiga, but as
> > the main use of PPC is embedded hardwares, it sounds good to have an
> > easily "hw" tunable emulator...
> > 
> 
> Regarding emulation of all PPC systems:
> Would it be possible to switch the system to little endian mode inside the 
> qemu process? That way, one could run Windows NT, which I always wanted 
> to try (but couldn't, because I don't have the necessary hardware).
> 
> This could also (with a slightly different approach) bring better speeds for
> i386 computations.

In theory, we could do that.
But it needs deep kernel patch as I think Linux never uses little-endian
pages on PPC. Maybe with a kind a mmap flag ? :-)
But, I don't think you can control endian mode for each page,
but only for 128 Mb large areas...
 
> > I just rsync'ed the latest mol, and it appears to me that openbios isn't
> > inside. It seems that it's only available through proprietary bk
> > software...
> > Is there a way to get it using a standard open mechanism (ie rsync or
> > CVS ?). It would be glad, as I cannot and never want to use any
> > proprietary software on my linux boxes...
> > 
> 
> I had to bite the bullet a month ago and install Bitkeeper (precisely for
> MOL),
> and I can't say I like it. It's really sad that there seems no other way to
> get
> up-to-date MOL sources.

Well, you can get MOL sources via rsync, but not their openbios
repository. You can get the "official" openbios via cvs, but there is no
support for PPC...


-- 
Jocelyn Mayer <l_indien@magic.fr>
Never organized

Re: [Qemu-devel] PPC emulation on Qemu

[Benjamin Herrenschmidt]

> In theory, we could do that.
> But it needs deep kernel patch as I think Linux never uses little-endian
> pages on PPC. Maybe with a kind a mmap flag ? :-)
> But, I don't think you can control endian mode for each page,
> but only for 128 Mb large areas...

Endian control depends on the CPU type (BookE has per page E bit,
6xx/7xx desktops have a global endian mode, and G5s don't have little
endian support at all).

It's useless but for old versions of Windows NT, which means it's
useless, period. :)

> Well, you can get MOL sources via rsync, but not their openbios
> repository. You can get the "official" openbios via cvs, but there is no
> support for PPC...

If you look at the MOL bk web front end, you'll see an openbios dir
in there)

Ben.

Re: [Qemu-devel] PPC emulation on Qemu

[J. Mayer]

On Thu, 2004-02-19 at 00:13, Benjamin Herrenschmidt wrote:
> > In theory, we could do that.
> > But it needs deep kernel patch as I think Linux never uses little-endian
> > pages on PPC. Maybe with a kind a mmap flag ? :-)
> > But, I don't think you can control endian mode for each page,
> > but only for 128 Mb large areas...
> 
> Endian control depends on the CPU type (BookE has per page E bit,
> 6xx/7xx desktops have a global endian mode, and G5s don't have little
> endian support at all).

Well, it doesn't seem to be usable...

> It's useless but for old versions of Windows NT, which means it's
> useless, period. :)

It could improve performance for little-endian architectures emulation,
but l<n>brx & st<n>brx may be as efficient as this mode, so let's forget
about it...

> > Well, you can get MOL sources via rsync, but not their openbios
> > repository. You can get the "official" openbios via cvs, but there is no
> > support for PPC...
> 
> If you look at the MOL bk web front end, you'll see an openbios dir
> in there)

Yep, I've already seen it, but I can't get the a copy of this
repository. But I saw it's a copy of a CVS tree. Is this tree available
somewhere ?

-- 
J. Mayer <l_indien@magic.fr>
Never organized

Re: [Qemu-devel] PPC emulation on Qemu

[Benjamin Herrenschmidt]

> > If you look at the MOL bk web front end, you'll see an openbios dir
> > in there)
> 
> Yep, I've already seen it, but I can't get the a copy of this
> repository. But I saw it's a copy of a CVS tree. Is this tree available
> somewhere ?

I don't know about CVS. What's wrong with bk clone ?

Ben.

Re: [Qemu-devel] PPC emulation on Qemu

[J. Mayer]

On Thu, 2004-02-19 at 02:57, Benjamin Herrenschmidt wrote:
> > > If you look at the MOL bk web front end, you'll see an openbios dir
> > > in there)
> > 
> > Yep, I've already seen it, but I can't get the a copy of this
> > repository. But I saw it's a copy of a CVS tree. Is this tree available
> > somewhere ?
> 
> I don't know about CVS. What's wrong with bk clone ?

No sources, no specs... 
Cannot compile it => cannot install to use it,
neither can I write a free client...
Want to keep my machine and my mind safe and free from those kind of
softwares...

-- 
J. Mayer <l_indien@magic.fr>
Never organized

Re: [Qemu-devel] PPC emulation on Qemu

[Benjamin Herrenschmidt]

On Thu, 2004-02-19 at 13:32, J. Mayer wrote:
> On Thu, 2004-02-19 at 02:57, Benjamin Herrenschmidt wrote:
> > > > If you look at the MOL bk web front end, you'll see an openbios dir
> > > > in there)
> > > 
> > > Yep, I've already seen it, but I can't get the a copy of this
> > > repository. But I saw it's a copy of a CVS tree. Is this tree available
> > > somewhere ?
> > 
> > I don't know about CVS. What's wrong with bk clone ?
> 
> No sources, no specs... 

Do bk -r get once you have cloned the tree to checkout the files

> Cannot compile it => cannot install to use it,
> neither can I write a free client...
> Want to keep my machine and my mind safe and free from those kind of
> softwares...

Heh... There may be an rsync mirror, I don't know

Ben.

Re: [Qemu-devel] PPC emulation on Qemu

[J. Mayer]

On Thu, 2004-02-19 at 03:48, Benjamin Herrenschmidt wrote:
> On Thu, 2004-02-19 at 13:32, J. Mayer wrote:
> > On Thu, 2004-02-19 at 02:57, Benjamin Herrenschmidt wrote:
> > > > > If you look at the MOL bk web front end, you'll see an openbios dir
> > > > > in there)
> > > > 
> > > > Yep, I've already seen it, but I can't get the a copy of this
> > > > repository. But I saw it's a copy of a CVS tree. Is this tree available
> > > > somewhere ?
> > > 
> > > I don't know about CVS. What's wrong with bk clone ?
> > 
> > No sources, no specs... 
> 
> Do bk -r get once you have cloned the tree to checkout the files
> 
> > Cannot compile it => cannot install to use it,
> > neither can I write a free client...
> > Want to keep my machine and my mind safe and free from those kind of
> > softwares...
> 
> Heh... There may be an rsync mirror, I don't know

I hope ! That's what I'm looking for !
There's a CVS at openbios.org, but it's not up-to-date, for PPC support.
And:
\> rsync -avz rsync.penguinppc.org::
linux-2.4-benh  Ben's 2.4 Tree (aka, the PowerMac tree)
mol             Mac-On-Linux Source
libmol          Binary MOL Support Files
yaboot          Yaboot 1.3.x Development Tree (yaboot--devel--1.3)
yaboot-unstable Yaboot 1.99 Development Tree (yaboot--devel--1.99)
prom-libc       Prom-libc 1.0 Development Tree (prom-libc--devel--1.0)
No luck, no open-bios there...

-- 
J. Mayer <l_indien@magic.fr>
Never organized

Re: [Qemu-devel] PPC emulation on Qemu

[Benjamin Herrenschmidt]

> 
> I hope ! That's what I'm looking for !
> There's a CVS at openbios.org, but it's not up-to-date, for PPC support.
> And:

Just mail samuel and ask him

Ben.

Re: [Qemu-devel] PPC emulation on Qemu

[Gwenole Beauchesne]

Hi,

>> Latest "devel" tree from Samuel started integrating OpenBIOS in MOL
>> (that is a full OF implementation).
>
> OpenBios would be great, but it seems to be far from running. I got
> something nearly running, in host environment. But if OpenBios gets
> close to a full real Bios, I'd be glad to use it !

And running BeOS? ;-)

>> What is OpenPPC standard ? So far, the most "standard" PPCs are
>> PowerMacs ;)
>
> Well, G4 Macs are close to OpenPPC standard, which is an open platform
> which has been described by IBM.

I believe only 7.5.2 + unreleased enabler was able to run on CHIRP 
platforms (Starmax 6000 or those with IBM LongTrail prototype boards). 
Or is the "OpenPPC standard" another thing?

> Does the OSI calls mechanism needs patched OS and/or firmware ?

I have not looked at MOL that much but OSI stands for Operating System 
Interface. i.e. a means that can communicate from the guest OS and the 
host OS through (here) "normal" syscalls. On the Mac side, specific 
drivers use those syscall to get/set variables in a fast way. Ben said 
it's all optional but useful performance wise. SheepShaver does a 
similar thing with EmulOps (major opcode = 6 on ppc), or direct TVECT 
patching on native PPC.

Bye,
Gwenole.

Re: [Qemu-devel] PPC emulation on Qemu

[Chad Page]

On Mon, 16 Feb 2004, Gwenole Beauchesne wrote:

> > Does the OSI calls mechanism needs patched OS and/or firmware ?
> 
> I have not looked at MOL that much but OSI stands for Operating System 
> Interface. i.e. a means that can communicate from the guest OS and the 
> host OS through (here) "normal" syscalls. On the Mac side, specific 
> drivers use those syscall to get/set variables in a fast way. Ben said 
> it's all optional but useful performance wise. SheepShaver does a 
> similar thing with EmulOps (major opcode = 6 on ppc), or direct TVECT 
> patching on native PPC.
> 

	Sidenote:  Perhaps if OSI could be made available in both PPC and
X86 qemu system emulators we could keep a patch against 2.6.x with drivers
to use those calls to make running Linux faster on x86 as well.  Combined
with the latest work Fabrice is doing getting rid of slow PIO for hard
drives would be a good thing.

	- Chad