Currently, users of the LPAE page table code are (ab)using dma_map_page()
as a means to flush page table updates for non-coherent IOMMUs. Since
from the CPU's point of view, creating IOMMU page tables *is* passing
DMA buffers to a device (the IOMMU's page table walker), there's little
reason not to
With the correct DMA API calls now integrated into the io-pgtable code,
let that handle the flushing of non-coherent page table updates.
Signed-off-by: Robin Murphy
---
drivers/iommu/ipmmu-vmsa.c | 19 +--
1 file changed, 5 insertions(+), 14 deletions(-)
diff --git a/drivers/iom
With the correct DMA API calls now integrated into the io-pgtable code,
let that handle the flushing of non-coherent page table updates.
Signed-off-by: Robin Murphy
---
drivers/iommu/arm-smmu.c | 22 ++
1 file changed, 6 insertions(+), 16 deletions(-)
diff --git a/drivers/io
With the correct DMA API calls now integrated into the io-pgtable code,
let that handle the flushing of non-coherent page table updates.
Signed-off-by: Robin Murphy
---
drivers/iommu/arm-smmu-v3.c | 18 +++---
1 file changed, 3 insertions(+), 15 deletions(-)
diff --git a/drivers/iom
With the io-pgtable code now enforcing its own appropriate sync points,
the vestigial flush_pgtable callback becomes entirely redundant, so
remove it altogether.
Signed-off-by: Robin Murphy
---
drivers/iommu/arm-smmu-v3.c | 10 --
1 file changed, 10 deletions(-)
diff --git a/drivers/iom
With all current users now opted in to DMA API operations, make the
iommu_dev pointer mandatory, rendering the flush_pgtable callback
redundant for cache maintenance. However, since the DMA calls could be
nops in the case of a coherent IOMMU, we still need to ensure the page
table updates are fully
With the io-pgtable code now enforcing its own appropriate sync points,
the vestigial flush_pgtable callback becomes entirely redundant, so
remove it altogether.
Signed-off-by: Robin Murphy
---
drivers/iommu/arm-smmu.c | 13 -
1 file changed, 13 deletions(-)
diff --git a/drivers/iom
Currently, we detect whether the SMMU has coherent page table walk
capability from the IDR0.CTTW field, and base our cache maintenance
decisions on that. In preparation for fixing the bogus DMA API usage,
however, we need to ensure that the DMA API agrees about this, which
necessitates deferring to
With the users fully converted to DMA API operations, it's dead, Jim.
Signed-off-by: Robin Murphy
---
drivers/iommu/io-pgtable-arm.c | 6 --
drivers/iommu/io-pgtable.h | 2 --
2 files changed, 8 deletions(-)
diff --git a/drivers/iommu/io-pgtable-arm.c b/drivers/iommu/io-pgtable-arm.c
in
Hi Jörg,
On 07/29/2015 at 05:22 PM, Joerg Roedel wrote:
> Hi Andreas,
>
> On Fri, Jul 24, 2015 at 07:59:07PM +0200, Andreas Hartmann wrote:
>> New information: During testing, I now realized that Linux 4.0.9 shows
>> the same problem ... . I'm now testing 3.19.4.
>
> Have you seen the issue on 3
On Mon, Jul 20, 2015 at 07:13:49PM -0500, Bjorn Helgaas wrote:
> Gregor reported a deadlock [1] when enabling a VF that supports ATS.
> This series is intended to fix that. The second patch should be enough to
> fix the deadlock; the rest are simplification and cleanup.
>
> These are based on v4.
Hi Andreas,
On Fri, Jul 24, 2015 at 07:59:07PM +0200, Andreas Hartmann wrote:
> New information: During testing, I now realized that Linux 4.0.9 shows
> the same problem ... . I'm now testing 3.19.4.
Have you seen the issue on 3.19 too or hasn't it happened there at all
yet? The question is where
On Wed, Jul 29, 2015 at 06:41:31AM +0100, Yong Wu wrote:
> On Mon, 2015-07-27 at 16:49 +0100, Robin Murphy wrote:
> > On 27/07/15 16:31, Russell King - ARM Linux wrote:
> > > On Mon, Jul 27, 2015 at 02:23:26PM +0100, Robin Murphy wrote:
> > >> On 16/07/15 10:04, Yong Wu wrote:
> > >>> This patch ad
On Thu, 2015-07-23 at 22:40 +0800, Daniel Kurtz wrote:
> Hi Yong,
>
> On Thu, Jul 16, 2015 at 5:04 PM, Yong Wu wrote:
> >
> > This patch add the iommu/larbs nodes for mt8173
>
> To what tree does this apply?
> Please rebase these patches (especially this one) on an Matthias'
> current v4.2-next/
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