linuxppc-dev.lists.ozlabs.org archive mirror
 help / color / mirror / Atom feed
From: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
To: Ian.Campbell@citrix.com
Cc: jeremy@goop.org, tony.luck@intel.com, linux-ia64@vger.kernel.org,
	x86@kernel.org, linux-kernel@vger.kernel.org,
	fujita.tomonori@lab.ntt.co.jp, linuxppc-dev@ozlabs.org,
	joerg.roedel@amd.com, mingo@elte.hu
Subject: Re: [00/15] swiotlb cleanup
Date: Mon, 13 Jul 2009 13:20:26 +0900	[thread overview]
Message-ID: <20090713131859N.fujita.tomonori@lab.ntt.co.jp> (raw)
In-Reply-To: <1247234520.4002.418.camel@zakaz.uk.xensource.com>

On Fri, 10 Jul 2009 15:02:00 +0100
Ian Campbell <Ian.Campbell@citrix.com> wrote:

> On Fri, 2009-07-10 at 14:35 +0900, FUJITA Tomonori wrote:
> > I don't think that we need to take account of dom0 support; we don't
> > have a clear idea about an acceptable dom0 design (it needs to use
> > swiotlb code? I don't know yet), we don't even know we will have dom0
> > support in mainline. That's why I didn't CC this patchset to Xen
> > camp.
> 
> The core domain 0 patches which were the subject of the discussions a
> few week back are completely orthogonal to the swiotlb side of things

? If we don't merge dom0 patch, we don't need dom0 changes to
swiotlb. We don't know we would have dom0 support in mainline. Or I
overlooked something?


> and whatever form they eventually take I do not think it will have any
> impact on the shape of the solution which we arrive at for swiotlb. I
> don't think that assuming that domain 0 can never be done in a way which
> everyone finds acceptable and therefore discounting all consideration of
> it is a useful way to make progress with these issues.
> 
> The DMA use case is much more tightly tied to the paravirtualized MMU
> (which is already in the kernel for domU purposes) than it is to "the
> domain 0" patches anyway. Although domain 0 is probably the main use
> case, at least today, swiotlb support is also used in a Xen domU as part
> of the support for direct assignment of PCI devices to paravirtualised
> guests (pci passthrough).
> 
> The pci frontend driver depends on some bits of the domain 0 physical
> interrupt patches as well as swiotlb which is why I/we haven't tried to
> upstream that particular series yet.

As far as I know, you have not posted anything about changes to
swiotlb for domU. I can't discuss it. If you want, please send
patches.

  reply	other threads:[~2009-07-13  4:21 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-07-10  1:04 [00/15] swiotlb cleanup FUJITA Tomonori
2009-07-10  1:04 ` [PATCH 01/15] swiotlb: remove unused swiotlb_alloc_boot() FUJITA Tomonori
2009-07-10  1:04 ` [PATCH 02/15] swiotlb: remove unused swiotlb_alloc() FUJITA Tomonori
2009-07-10  1:04 ` [PATCH 03/15] swiotlb: remove swiotlb_arch_range_needs_mapping FUJITA Tomonori
2009-07-10  1:04 ` [PATCH 04/15] swiotlb: remove unnecessary swiotlb_bus_to_virt FUJITA Tomonori
2009-07-14  2:17   ` Becky Bruce
2009-07-14  5:08     ` FUJITA Tomonori
2009-07-16  3:40     ` Benjamin Herrenschmidt
2009-07-10  1:04 ` [PATCH 05/15] x86: add dma_capable() to replace is_buffer_dma_capable() FUJITA Tomonori
2009-07-10  1:04 ` [PATCH 06/15] x86: replace is_buffer_dma_capable() with dma_capable FUJITA Tomonori
2009-07-10  1:04 ` [PATCH 07/15] ia64: add dma_capable() to replace is_buffer_dma_capable() FUJITA Tomonori
2009-07-10  1:04 ` [PATCH 08/15] powerpc: " FUJITA Tomonori
2009-07-10  1:04 ` [PATCH 09/15] swiotlb: use dma_capable() FUJITA Tomonori
2009-07-10  1:04 ` [PATCH 10/15] powerpc: remove unncesary swiotlb_arch_address_needs_mapping FUJITA Tomonori
2009-07-10  1:05 ` [PATCH 11/15] remove is_buffer_dma_capable() FUJITA Tomonori
2009-07-10  1:05 ` [PATCH 12/15] x86, IA64, powerpc: add phys_to_dma() and dma_to_phys() FUJITA Tomonori
2009-07-10  1:05 ` [PATCH 13/15] swiotlb: use phys_to_dma and dma_to_phys FUJITA Tomonori
2009-07-10  1:05 ` [PATCH 14/15] powerpc: remove unused swiotlb_phys_to_bus() and swiotlb_bus_to_phys() FUJITA Tomonori
2009-07-10  1:05 ` [PATCH 15/15] x86: " FUJITA Tomonori
2009-07-10  5:12 ` [00/15] swiotlb cleanup Ingo Molnar
2009-07-10  5:35   ` FUJITA Tomonori
2009-07-10 14:02     ` Ian Campbell
2009-07-13  4:20       ` FUJITA Tomonori [this message]
2009-07-13  9:40         ` Ian Campbell
2009-07-13  9:53           ` FUJITA Tomonori
2009-07-13 10:05             ` Ian Campbell
2009-07-10 14:01   ` Ian Campbell
2009-07-10 14:12     ` Ingo Molnar
2009-07-13  4:20       ` FUJITA Tomonori
2009-07-13  9:16         ` FUJITA Tomonori
2009-07-18 10:41           ` Ingo Molnar
2009-07-14  3:13   ` Becky Bruce
2009-07-15 20:24     ` Becky Bruce

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=20090713131859N.fujita.tomonori@lab.ntt.co.jp \
    --to=fujita.tomonori@lab.ntt.co.jp \
    --cc=Ian.Campbell@citrix.com \
    --cc=jeremy@goop.org \
    --cc=joerg.roedel@amd.com \
    --cc=linux-ia64@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linuxppc-dev@ozlabs.org \
    --cc=mingo@elte.hu \
    --cc=tony.luck@intel.com \
    --cc=x86@kernel.org \
    /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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).