with protection. This is
> > especially interesting for s390 as VIRTIO_F_IOMMU_PLATFORM pushes all
> > the virtio control structures into the first 2G of guest memory:
> > something we don't necessarily want to do per-default.
> >
> > Signed-off-by:
On Tue, Oct 15, 2019 at 09:35:01AM +0200, Christoph Hellwig wrote:
> On Fri, Oct 11, 2019 at 06:25:19PM -0700, Ram Pai wrote:
> > From: Thiago Jung Bauermann
> >
> > Normally, virtio enables DMA API with VIRTIO_F_IOMMU_PLATFORM, which must
> > be set by both devic
On Mon, Oct 14, 2019 at 11:29:24AM +0100, Robin Murphy wrote:
> On 14/10/2019 05:51, David Gibson wrote:
> >On Fri, Oct 11, 2019 at 06:25:18PM -0700, Ram Pai wrote:
> >>From: Thiago Jung Bauermann
> >>
> >>In order to safely use the DMA API, virtio nee
Hmm.. git-send-email forgot to CC Michael Tsirkin, and Thiago; the
original author, who is on vacation.
Adding them now.
RP
On Fri, Oct 11, 2019 at 06:25:17PM -0700, Ram Pai wrote:
> **We would like the patches to be merged through the virtio tree. Please
> review, and ack merging t
of these assumptions down
the road, we check at probe time and fail if that's not the case.
cc: Benjamin Herrenschmidt
cc: David Gibson
cc: Michael Ellerman
cc: Paul Mackerras
cc: Michael Roth
cc: Alexey Kardashevskiy
cc: Jason Wang
cc: Christoph Hellwig
Suggested-by: Michael S. Tsirkin
Signed-off-by: Ram
: Michael Roth
cc: Alexey Kardashevskiy
cc: Paul Burton
cc: Robin Murphy
cc: Bartlomiej Zolnierkiewicz
cc: Marek Szyprowski
cc: Christoph Hellwig
Suggested-by: Michael S. Tsirkin
Signed-off-by: Ram Pai
Signed-off-by: Thiago Jung Bauermann
---
arch/powerpc/include/asm/dma-mapping.h | 21
**We would like the patches to be merged through the virtio tree. Please
review, and ack merging the DMA mapping change through that tree. Thanks!**
The memory of powerpc secure guests can't be accessed by the hypervisor /
virtio device except for a few memory regions designated as 'shared'.
On Tue, Aug 13, 2019 at 08:45:37AM -0700, Ram Pai wrote:
> On Wed, Aug 14, 2019 at 12:24:39AM +1000, David Gibson wrote:
> > On Tue, Aug 13, 2019 at 03:26:17PM +0200, Christoph Hellwig wrote:
> > > On Mon, Aug 12, 2019 at 07:51:56PM +1000, David Gibson wrote:
> > &g
ould not be aware and should be
entirely a decision made locally by the kernel/driver in the secure VM.
RP
>
> --
> David Gibson | I'll have my music baroque, and my code
> david AT gibson.dropbear.id.au| minimalist, thank you. NOT _the_
> _other_
>
On Mon, Aug 12, 2019 at 02:13:24PM +0200, Christoph Hellwig wrote:
> On Sat, Aug 10, 2019 at 11:46:21PM -0700, Ram Pai wrote:
> > If the hypervisor (hardware for hw virtio devices) does not mandate a
> > DMA API, why is it illegal for the driver to request, special handling
> &g
o do with
DMA address translation?
--
Ram Pai
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our Secure pseries platform, dma address is physical address and this
proposal will help us, use DMA API.
On our normal pseries platform, dma address is physical address too.
But we do not necessarily need to use the DMA API. We can use the DMA
API, but our handlers will do the same thin
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