From: David Woodhouse <dwmw2@infradead.org>
To: Shamir Rabinovitch <shamir.rabinovitch@oracle.com>,
arnd@arndb.de, corbet@lwn.net, linux-doc@vger.kernel.org,
linux-arch@vger.kernel.org
Cc: Andy Lutomirski <luto@kernel.org>, Joerg Roedel <jroedel@suse.de>,
Christian Borntraeger <borntraeger@de.ibm.com>,
Cornelia Huck <cornelia.huck@de.ibm.com>,
Sebastian Ott <sebott@linux.vnet.ibm.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Christoph Hellwig <hch@lst.de>,
benh@kernel.crashing.org, KVM <kvm@vger.kernel.org>,
dwmw2@infradead.org, Martin Schwidefsky <schwidefsky@de.ibm.com>,
linux-s390 <linux-s390@vger.kernel.org>
Subject: Re: [PATCH v1 2/2] dma-mapping-common: add DMA attribute - DMA_ATTR_IOMMU_BYPASS
Date: Wed, 28 Oct 2015 15:30:01 +0900 [thread overview]
Message-ID: <1446013801.3405.183.camel@infradead.org> (raw)
In-Reply-To: <1445789224-28032-2-git-send-email-shamir.rabinovitch@oracle.com>
[-- Attachment #1: Type: text/plain, Size: 607 bytes --]
On Sun, 2015-10-25 at 09:07 -0700, Shamir Rabinovitch wrote:
>
> +
> +DMA_ATTR_IOMMU_BYPASS
> +---------------------
> +
> > +For systems with IOMMU it is assumed all DMA translations use the IOMMU.
Not entirely true. We have per-device dma_ops on a most architectures
already, and we were just talking about the need to add them to
POWER/SPARC too, because we need to avoid trying to use the IOMMU to
map virtio devices too.
As we look at that (and make the per-device dma_ops a generic thing
rather than per-arch), we should probably look at folding your case in
too.
--
dwmw2
[-- Attachment #2: smime.p7s --]
[-- Type: application/x-pkcs7-signature, Size: 5691 bytes --]
next parent reply other threads:[~2015-10-28 6:30 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1445789224-28032-1-git-send-email-shamir.rabinovitch@oracle.com>
[not found] ` <1445789224-28032-2-git-send-email-shamir.rabinovitch@oracle.com>
2015-10-28 6:30 ` David Woodhouse [this message]
2015-10-28 11:10 ` [PATCH v1 2/2] dma-mapping-common: add DMA attribute - DMA_ATTR_IOMMU_BYPASS Shamir Rabinovitch
2015-10-28 13:31 ` David Woodhouse
2015-10-28 14:07 ` David Miller
2015-10-28 13:57 ` David Woodhouse
2015-10-29 0:23 ` David Miller
2015-10-29 0:32 ` Benjamin Herrenschmidt
2015-10-29 0:42 ` David Woodhouse
2015-10-29 1:10 ` Benjamin Herrenschmidt
2015-10-29 18:31 ` Andy Lutomirski
2015-10-29 22:35 ` David Woodhouse
2015-11-01 7:45 ` Shamir Rabinovitch
2015-11-01 21:10 ` Benjamin Herrenschmidt
2015-11-02 7:23 ` Shamir Rabinovitch
2015-11-02 10:00 ` Benjamin Herrenschmidt
2015-11-02 12:07 ` Shamir Rabinovitch
2015-11-02 20:13 ` Benjamin Herrenschmidt
2015-11-02 21:45 ` Arnd Bergmann
2015-11-02 23:08 ` Benjamin Herrenschmidt
2015-11-03 13:11 ` Christoph Hellwig
2015-11-03 19:35 ` Benjamin Herrenschmidt
2015-11-02 21:49 ` Shamir Rabinovitch
2015-11-02 22:48 ` David Woodhouse
2015-11-02 23:10 ` Benjamin Herrenschmidt
2015-11-05 21:08 ` David Miller
2015-10-30 1:51 ` Benjamin Herrenschmidt
2015-10-30 10:32 ` Arnd Bergmann
2015-10-30 23:17 ` Benjamin Herrenschmidt
2015-10-30 23:24 ` Arnd Bergmann
2015-11-02 14:51 ` Joerg Roedel
2015-10-29 7:32 ` Shamir Rabinovitch
2015-11-02 14:44 ` Joerg Roedel
2015-11-02 17:32 ` Shamir Rabinovitch
2015-11-05 13:42 ` Joerg Roedel
2015-11-05 21:11 ` David Miller
2015-11-07 15:06 ` Shamir Rabinovitch
[not found] ` <CAN+hb0UvztgwNuAh93XdJEe7vgiZgNMc9mHNziHpEopg8Oi4Mg@mail.gmail.com>
2015-11-16 8:42 ` David Woodhouse
[not found] ` <CAN+hb0UWpfcS5DvgMxNjY-5JOztw2mO1r2FJAW17fn974mhxPA@mail.gmail.com>
2015-11-16 18:42 ` Benjamin Serebrin
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=1446013801.3405.183.camel@infradead.org \
--to=dwmw2@infradead.org \
--cc=arnd@arndb.de \
--cc=benh@kernel.crashing.org \
--cc=borntraeger@de.ibm.com \
--cc=corbet@lwn.net \
--cc=cornelia.huck@de.ibm.com \
--cc=hch@lst.de \
--cc=jroedel@suse.de \
--cc=kvm@vger.kernel.org \
--cc=linux-arch@vger.kernel.org \
--cc=linux-doc@vger.kernel.org \
--cc=linux-s390@vger.kernel.org \
--cc=luto@kernel.org \
--cc=pbonzini@redhat.com \
--cc=schwidefsky@de.ibm.com \
--cc=sebott@linux.vnet.ibm.com \
--cc=shamir.rabinovitch@oracle.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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox