On Thu, 2018-08-23 at 07:24 +0200, Christoph Hellwig wrote:
> > Well, iommus can have bypass regions, which we also use for
> > performance, so we do at dma_set_mask() time "swap" the ops around, and
> > in that case, we do want to check the mask against the actual top of
> > memory...
>
> That is
On Thu, Aug 23, 2018 at 10:01:45AM +1000, Benjamin Herrenschmidt wrote:
> > The general scheme that architectures should implement is:
> >
> > ZONE_DMA: Any memory below a magic threshold that is lower than
> > 32-bit. Only enabled if actually required (usually
> > eithe
On Thu, Aug 23, 2018 at 09:59:18AM +1000, Benjamin Herrenschmidt wrote:
> > Yeah, the other platforms that support these devices support ZONE_DMA
> > to reliably handle these devices. But there is two other ways the
> > current code would actually handle these fine despite the dma_direct
> > checks
On Wed, 2018-08-22 at 08:58 +0200, Christoph Hellwig wrote:
> On Thu, Aug 09, 2018 at 09:54:33AM +1000, Benjamin Herrenschmidt wrote:
> > On Mon, 2018-07-30 at 18:38 +0200, Christoph Hellwig wrote:
> > > We need to take the DMA offset and encryption bit into account when
> > > selecting
> > > a zo
On Wed, 2018-08-22 at 08:53 +0200, Christoph Hellwig wrote:
> On Thu, Aug 09, 2018 at 09:44:18AM +1000, Benjamin Herrenschmidt wrote:
> > We do have the occasional device with things like 31-bit DMA
> > limitation. We know they happens to work because those systems
> > can't have enough memory to b
On Wed, 2018-08-22 at 08:45 +0200, Christoph Hellwig wrote:
> On Thu, Aug 09, 2018 at 10:01:16AM +1000, Benjamin Herrenschmidt wrote:
> > On Tue, 2018-07-31 at 14:16 +0200, Christoph Hellwig wrote:
> > > It turns out cxl actually uses it. So for now skip this patch,
> > > although random code in d
On Wed, 2018-08-22 at 09:02 +0200, Christoph Hellwig wrote:
> On Thu, Aug 09, 2018 at 10:27:46AM +1000, Benjamin Herrenschmidt wrote:
> > On Mon, 2018-07-30 at 18:38 +0200, Christoph Hellwig wrote:
> > > The requirement to disable local irqs over kmap_atomic is long gone,
> > > so remove those call
On Wed, Aug 22, 2018 at 9:08 AM John Garry wrote:
>
> On 22/08/2018 15:56, Robin Murphy wrote:
> > Hi John,
> >
> > On 22/08/18 14:44, John Garry wrote:
> >> On 21/09/2017 09:59, Ganapatrao Kulkarni wrote:
> >>> Adding numa aware memory allocations used for iommu dma allocation and
> >>> memory al
On 15/08/18 02:28, Zhen Lei wrote:
To support the non-strict mode, now we only tlbi and sync for the strict
mode. But for the non-leaf case, always follow strict mode.
Signed-off-by: Zhen Lei
---
drivers/iommu/io-pgtable-arm.c | 20 ++--
drivers/iommu/io-pgtable.h | 3 ++
On 15/08/18 02:28, Zhen Lei wrote:
Add a bootup option to make the system manager can choose which mode to
be used. The default mode is strict.
Signed-off-by: Zhen Lei
---
Documentation/admin-guide/kernel-parameters.txt | 13 +
drivers/iommu/arm-smmu-v3.c | 22
On 22/08/2018 15:56, Robin Murphy wrote:
Hi John,
On 22/08/18 14:44, John Garry wrote:
On 21/09/2017 09:59, Ganapatrao Kulkarni wrote:
Adding numa aware memory allocations used for iommu dma allocation and
memory allocated for SMMU stream tables, page walk tables and command
queues.
With this
On 20/08/18 10:31, Tomasz Figa wrote:
Hi Robin,
On Fri, Jul 27, 2018 at 4:02 PM Vivek Gautam
wrote:
This series provides the support for turning on the arm-smmu's
clocks/power domains using runtime pm. This is done using
device links between smmu and client devices. The device link
framework
On 27/07/18 08:02, Vivek Gautam wrote:
qcom,smmu-v2 is an arm,smmu-v2 implementation with specific
clock and power requirements. This smmu core is used with
multiple masters on msm8996, viz. mdss, video, etc.
Add bindings for the same.
Signed-off-by: Vivek Gautam
Reviewed-by: Rob Herring
Revie
Hi John,
On 22/08/18 14:44, John Garry wrote:
On 21/09/2017 09:59, Ganapatrao Kulkarni wrote:
Adding numa aware memory allocations used for iommu dma allocation and
memory allocated for SMMU stream tables, page walk tables and command
queues.
With this patch, iperf testing on ThunderX2, with
On 21/09/2017 09:59, Ganapatrao Kulkarni wrote:
Adding numa aware memory allocations used for iommu dma allocation and
memory allocated for SMMU stream tables, page walk tables and command queues.
With this patch, iperf testing on ThunderX2, with 40G NIC card on
NODE 1 PCI shown same performance
On Thu, Aug 09, 2018 at 11:57:53AM +1000, Benjamin Herrenschmidt wrote:
> Note: We will still need to implement some custom variant of this
> for our secure VMs ...
>
> Basically we'll need to use the existing bounce bufferring as-is but
> the condition will be different, it won't be whether the
On Thu, Aug 09, 2018 at 10:27:46AM +1000, Benjamin Herrenschmidt wrote:
> On Mon, 2018-07-30 at 18:38 +0200, Christoph Hellwig wrote:
> > The requirement to disable local irqs over kmap_atomic is long gone,
> > so remove those calls.
>
> Really ? I'm trying to verify that and getting lost in a mes
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