All of lore.kernel.org
 help / color / mirror / Atom feed
From: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
To: Alexander Graf <agraf@suse.de>
Cc: Devel <xen-devel@lists.xensource.com>,
	Stefano Stabellini <Stefano.Stabellini@eu.citrix.com>,
	Jan Kiszka <jan.kiszka@siemens.com>,
	Xen@gnu.org, QEMU-devel <qemu-devel@nongnu.org>,
	Anthony Perard <anthony.perard@citrix.com>
Subject: Re: [Xen-devel] Re: [Qemu-devel] [PATCH V10 02/15] xen: Make xen build only on x86 target.
Date: Fri, 11 Mar 2011 11:15:37 +0000	[thread overview]
Message-ID: <alpine.DEB.2.00.1103111107130.2968@kaball-desktop> (raw)
In-Reply-To: <FE11EAC4-5242-4B33-B713-C20A46C54CBC@suse.de>

On Fri, 11 Mar 2011, Alexander Graf wrote:
> 
> On 24.02.2011, at 18:59, Anthony Liguori wrote:
> 
> > On 02/24/2011 11:46 AM, Jan Kiszka wrote:
> >> On 2011-02-24 18:27, Anthony Liguori wrote:
> >>   
> >>> On 02/24/2011 10:25 AM, Anthony PERARD wrote:
> >>>     
> >>>> On Thu, Feb 24, 2011 at 16:11, Anthony Liguori<anthony@codemonkey.ws>   wrote:
> >>>> 
> >>>>       
> >>>>> Is this really necessary?  The advantage to building globally is that it
> >>>>> keeps the code from getting unnecessary i386-isms.
> >>>>> 
> >>>>>         
> >>>> Nop, is not necessary, I add this patch after this mail:
> >>>> http://lists.nongnu.org/archive/html/qemu-devel/2010-12/msg00044.html
> >>>> 
> >>>>       
> >>> Alex, do you feel strongly here?
> >>>     
> >> I'm not Alex, but I brought this issue up:
> >> 
> >> Either build xen bits once for all archs or restrict it to the only
> >> foreseeable arch with support in qemu. But please don't built it for
> >> each and every target separately.
> >>   
> > 
> > Oh yes, I misunderstood.  I thought we had previously built it for all architectures.  Yes, we should only build it once.
> 
> There's really no point in building it for anything but x86. Xen has never had been broadly used in PV mode on non-x86. Not sure ports even exist.
> 

There is an ia64 port available, but restricting xen to x86 makes sense
at least for the moment.


BTW qemu is mainly used in HVM mode on xen, but considering that cpu
emulation is not needed, qemu x86 would probably work for the ia64 case
too: this is how qemu-xen is used on ia64 at the moment, even though in
the qemu-xen case xen is not an accelerator but a new target with a set
of hardware devices very similar to x86.

WARNING: multiple messages have this Message-ID (diff)
From: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
To: Alexander Graf <agraf@suse.de>
Cc: Devel <xen-devel@lists.xensource.com>,
	Stefano Stabellini <Stefano.Stabellini@eu.citrix.com>,
	Jan Kiszka <jan.kiszka@siemens.com>,
	Xen, QEMU-devel <qemu-devel@nongnu.org>,
	Anthony Liguori <anthony@codemonkey.ws>,
	Anthony Perard <anthony.perard@citrix.com>
Subject: Re: Re: [Qemu-devel] [PATCH V10 02/15] xen: Make xen build only on x86 target.
Date: Fri, 11 Mar 2011 11:15:37 +0000	[thread overview]
Message-ID: <alpine.DEB.2.00.1103111107130.2968@kaball-desktop> (raw)
In-Reply-To: <FE11EAC4-5242-4B33-B713-C20A46C54CBC@suse.de>

On Fri, 11 Mar 2011, Alexander Graf wrote:
> 
> On 24.02.2011, at 18:59, Anthony Liguori wrote:
> 
> > On 02/24/2011 11:46 AM, Jan Kiszka wrote:
> >> On 2011-02-24 18:27, Anthony Liguori wrote:
> >>   
> >>> On 02/24/2011 10:25 AM, Anthony PERARD wrote:
> >>>     
> >>>> On Thu, Feb 24, 2011 at 16:11, Anthony Liguori<anthony@codemonkey.ws>   wrote:
> >>>> 
> >>>>       
> >>>>> Is this really necessary?  The advantage to building globally is that it
> >>>>> keeps the code from getting unnecessary i386-isms.
> >>>>> 
> >>>>>         
> >>>> Nop, is not necessary, I add this patch after this mail:
> >>>> http://lists.nongnu.org/archive/html/qemu-devel/2010-12/msg00044.html
> >>>> 
> >>>>       
> >>> Alex, do you feel strongly here?
> >>>     
> >> I'm not Alex, but I brought this issue up:
> >> 
> >> Either build xen bits once for all archs or restrict it to the only
> >> foreseeable arch with support in qemu. But please don't built it for
> >> each and every target separately.
> >>   
> > 
> > Oh yes, I misunderstood.  I thought we had previously built it for all architectures.  Yes, we should only build it once.
> 
> There's really no point in building it for anything but x86. Xen has never had been broadly used in PV mode on non-x86. Not sure ports even exist.
> 

There is an ia64 port available, but restricting xen to x86 makes sense
at least for the moment.


BTW qemu is mainly used in HVM mode on xen, but considering that cpu
emulation is not needed, qemu x86 would probably work for the ia64 case
too: this is how qemu-xen is used on ia64 at the moment, even though in
the qemu-xen case xen is not an accelerator but a new target with a set
of hardware devices very similar to x86.

  reply	other threads:[~2011-03-11 11:16 UTC|newest]

Thread overview: 68+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-02-02 14:49 [Qemu-devel] [PATCH V10 00/15] Xen device model support anthony.perard
2011-02-02 14:49 ` anthony.perard
2011-02-02 14:49 ` [Qemu-devel] [PATCH V10 01/15] xen: Replace some tab-indents with spaces (clean-up) anthony.perard
2011-02-02 14:49   ` anthony.perard
2011-02-24 16:06   ` [Qemu-devel] " Anthony Liguori
2011-02-02 14:49 ` [Qemu-devel] [PATCH V10 02/15] xen: Make xen build only on x86 target anthony.perard
2011-02-02 14:49   ` anthony.perard
2011-02-24 16:11   ` [Qemu-devel] " Anthony Liguori
2011-02-24 16:25     ` [Xen-devel] " Anthony PERARD
2011-02-24 16:25       ` Anthony PERARD
2011-02-24 17:27       ` [Xen-devel] " Anthony Liguori
2011-02-24 17:27         ` Anthony Liguori
2011-02-24 17:46         ` [Xen-devel] " Jan Kiszka
2011-02-24 17:46           ` Jan Kiszka
2011-02-24 17:59           ` [Xen-devel] " Anthony Liguori
2011-02-24 17:59             ` Anthony Liguori
2011-03-11  6:20             ` [Xen-devel] " Alexander Graf
2011-03-11  6:20               ` Alexander Graf
2011-03-11 11:15               ` Stefano Stabellini [this message]
2011-03-11 11:15                 ` Stefano Stabellini
2011-02-02 14:49 ` [Qemu-devel] [PATCH V10 03/15] xen: Support new libxc calls from xen unstable anthony.perard
2011-02-02 14:49   ` anthony.perard
2011-02-24 17:29   ` [Qemu-devel] " Anthony Liguori
2011-02-25 14:06     ` [Xen-devel] " Anthony PERARD
2011-02-25 14:06       ` Anthony PERARD
2011-02-25 14:11       ` [Xen-devel] " Anthony Liguori
2011-02-25 14:11         ` Anthony Liguori
2011-02-25 16:01         ` [Xen-devel] " Anthony PERARD
2011-02-25 16:01           ` Anthony PERARD
2011-02-02 14:49 ` [Qemu-devel] [PATCH V10 04/15] xen: Add initialisation of Xen anthony.perard
2011-02-02 14:49   ` anthony.perard
2011-02-02 14:49 ` [Qemu-devel] [PATCH V10 05/15] xen: Add xenfv machine anthony.perard
2011-02-02 14:49   ` anthony.perard
2011-02-24 17:31   ` [Qemu-devel] " Anthony Liguori
2011-02-25 13:55     ` Anthony PERARD
2011-02-25 14:09       ` Anthony Liguori
2011-02-25 14:28         ` [Xen-devel] " Anthony PERARD
2011-02-25 14:28           ` Anthony PERARD
2011-02-02 14:49 ` [Qemu-devel] [PATCH V10 06/15] xen: Add the Xen platform pci device anthony.perard
2011-02-02 14:49   ` anthony.perard
2011-02-24 17:33   ` [Qemu-devel] " Anthony Liguori
2011-02-24 17:36     ` Paolo Bonzini
2011-02-25  9:58       ` [Xen-devel] " Ian Campbell
2011-02-25  9:58         ` Ian Campbell
2011-02-25 10:54         ` Paolo Bonzini
2011-02-25 10:54           ` Paolo Bonzini
2011-02-25 14:18           ` [Xen-devel] " Anthony PERARD
2011-02-25 14:18             ` Anthony PERARD
2011-02-02 14:49 ` [Qemu-devel] [PATCH V10 07/15] piix_pci: Introduces Xen specific call for irq anthony.perard
2011-02-02 14:49   ` anthony.perard
2011-02-24 17:34   ` [Qemu-devel] " Anthony Liguori
2011-02-02 14:49 ` [Qemu-devel] [PATCH V10 08/15] xen: Introduce Xen Interrupt Controller anthony.perard
2011-02-02 14:49   ` anthony.perard
2011-02-02 14:49 ` [Qemu-devel] [PATCH V10 09/15] xen: Introduce the Xen mapcache anthony.perard
2011-02-02 14:49   ` anthony.perard
2011-02-02 14:49 ` [Qemu-devel] [PATCH V10 10/15] configure: Always use 64bits target physical addresses with xen enabled anthony.perard
2011-02-02 14:49   ` anthony.perard
2011-02-02 14:49 ` [Qemu-devel] [PATCH V10 11/15] Introduce qemu_put_ram_ptr anthony.perard
2011-02-02 14:49   ` anthony.perard
2011-02-02 14:49 ` [Qemu-devel] [PATCH V10 12/15] vl.c: Introduce getter for shutdown_requested and reset_requested anthony.perard
2011-02-02 14:49   ` anthony.perard
2011-02-02 14:49 ` [Qemu-devel] [PATCH V10 13/15] xen: Initialize event channels and io rings anthony.perard
2011-02-02 14:49   ` anthony.perard
2011-02-02 14:49 ` [Qemu-devel] [PATCH V10 14/15] xen: Set running state in xenstore anthony.perard
2011-02-02 14:49   ` anthony.perard
2011-02-02 14:49 ` [Qemu-devel] [PATCH V10 15/15] xen: Add Xen hypercall for sleep state in the cmos_s3 callback anthony.perard
2011-02-02 14:49   ` anthony.perard
2011-02-24 17:38 ` [Qemu-devel] [PATCH V10 00/15] Xen device model support Anthony Liguori

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=alpine.DEB.2.00.1103111107130.2968@kaball-desktop \
    --to=stefano.stabellini@eu.citrix.com \
    --cc=Xen@gnu.org \
    --cc=agraf@suse.de \
    --cc=anthony.perard@citrix.com \
    --cc=jan.kiszka@siemens.com \
    --cc=qemu-devel@nongnu.org \
    --cc=xen-devel@lists.xensource.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.