From: "Michael S. Tsirkin" <mst@redhat.com>
To: Alexander Graf <agraf@suse.de>
Cc: aliguori@us.ibm.com, kraxel@redhat.com, joerg.roedel@amd.com,
qemu-devel@nongnu.org, Avi Kivity <avi@redhat.com>,
eduard.munteanu@linux360.ro,
David Gibson <david@gibson.dropbear.id.au>,
rth@twiddle.net
Subject: Re: [Qemu-devel] [PATCH 1/9] Add stub functions for PCI device models to do PCI DMA
Date: Sun, 2 Oct 2011 13:43:56 +0200 [thread overview]
Message-ID: <20111002114356.GI30747@redhat.com> (raw)
In-Reply-To: <5707D1AA-7185-4934-B2EB-91131853ABCA@suse.de>
On Sun, Oct 02, 2011 at 01:28:37PM +0200, Alexander Graf wrote:
> >> Good point. Though this is really a virtio specific issue since
> >> other devices have explicit endianness (not guest dependent).
> >
> > Hmm, not entirely virtio specific, some devices use stX macros to do the
> > conversion. E.g. stw_be_phys and stl_le_phys are used in several
> > places.
>
> Yes, explicit endianness. Virtio is the only device type we support in QEMU that changes its endianness depending on the guest CPU. All other devices are independent of the guest CPU we're targeting.
>
>
> Alex
True I think, for pci devices. And virtio bypasses the iommu
anyway, so we don't need to worry about it. But the point is that it
makes sense to support endian-ness handling in the core.
--
MST
next prev parent reply other threads:[~2011-10-02 11:43 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-05 4:34 [Qemu-devel] [0/9] Preliminary work for IOMMU emulation support; the easy bits (v2) David Gibson
2011-09-05 4:34 ` [Qemu-devel] [PATCH 1/9] Add stub functions for PCI device models to do PCI DMA David Gibson
2011-10-02 10:25 ` Michael S. Tsirkin
2011-10-02 10:29 ` Avi Kivity
2011-10-02 10:52 ` Michael S. Tsirkin
2011-10-02 10:58 ` Avi Kivity
2011-10-02 11:17 ` Michael S. Tsirkin
2011-10-02 11:28 ` Alexander Graf
2011-10-02 11:43 ` Michael S. Tsirkin [this message]
2011-10-02 12:01 ` Avi Kivity
2011-10-02 12:14 ` Michael S. Tsirkin
2011-10-02 12:26 ` Avi Kivity
2011-10-03 13:17 ` Anthony Liguori
2011-10-12 3:09 ` David Gibson
2011-10-12 9:12 ` Michael S. Tsirkin
2011-10-14 2:14 ` David Gibson
2011-10-16 12:50 ` Michael S. Tsirkin
2011-10-16 13:15 ` Avi Kivity
2011-10-18 1:46 ` David Gibson
2011-10-19 0:31 ` Rusty Russell
2011-10-19 1:22 ` Michael S. Tsirkin
2011-10-19 9:10 ` Avi Kivity
2011-10-20 2:58 ` David Gibson
2011-10-12 3:07 ` David Gibson
2011-10-12 7:22 ` Michael S. Tsirkin
2011-10-12 15:43 ` David Gibson
2011-10-12 15:45 ` David Gibson
2011-10-12 3:11 ` David Gibson
2011-10-12 8:44 ` Michael S. Tsirkin
2011-10-12 9:08 ` Gerd Hoffmann
2011-10-03 13:10 ` Anthony Liguori
2011-09-05 4:34 ` [Qemu-devel] [PATCH 2/9] rtl8139: Use PCI DMA stub functions David Gibson
2011-09-05 4:34 ` [Qemu-devel] [PATCH 3/9] eepro100: " David Gibson
2011-10-02 11:45 ` Michael S. Tsirkin
2011-10-14 2:15 ` David Gibson
2011-09-05 4:34 ` [Qemu-devel] [PATCH 4/9] ac97: " David Gibson
2011-09-05 4:35 ` [Qemu-devel] [PATCH 5/9] es1370: " David Gibson
2011-09-05 4:35 ` [Qemu-devel] [PATCH 6/9] e1000: " David Gibson
2011-09-05 4:35 ` [Qemu-devel] [PATCH 7/9] lsi53c895a: " David Gibson
2011-09-05 4:35 ` [Qemu-devel] [PATCH 8/9] pcnet-pci: " David Gibson
2011-09-05 4:35 ` [Qemu-devel] [PATCH 9/9] intel-hda: " David Gibson
2011-09-16 6:58 ` [Qemu-devel] [0/9] Preliminary work for IOMMU emulation support; the easy bits (v2) David Gibson
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