On 2021-06-07 19:25, Nadav Amit wrote:
From: Nadav Amit
Do not use flush-queue on virtualized environments, where the NpCache
capability of the IOMMU is set. This is required to reduce
virtualization overheads.
This change follows a similar change to Intel's VT-d and a detailed
explanation as
On 2021-06-07 19:25, Nadav Amit wrote:
From: Nadav Amit
AMD's IOMMU can flush efficiently (i.e., in a single flush) any range.
This is in contrast, for instnace, to Intel IOMMUs that have a limit on
the number of pages that can be flushed in a single flush. In addition,
AMD's IOMMU do not
On 2021-06-15 13:29, Yong Wu wrote:
On Mon, 2021-06-07 at 11:25 -0700, Nadav Amit wrote:
From: Robin Murphy
The Mediatek driver is not the only one which might want a basic
address-based gathering behaviour, so although it's arguably simple
enough to open-code, let's factor it out for the
On Mon, 2021-06-07 at 11:25 -0700, Nadav Amit wrote:
> From: Robin Murphy
>
> The Mediatek driver is not the only one which might want a basic
> address-based gathering behaviour, so although it's arguably simple
> enough to open-code, let's factor it out for the sake of cleanliness.
> Let's
On Tue, Jun 15, 2021 at 12:51:38PM +0100, Robin Murphy wrote:
> On 2021-06-15 12:34, Will Deacon wrote:
> > On Tue, Jun 15, 2021 at 07:22:10PM +0800, Leizhen (ThunderTown) wrote:
> > >
> > >
> > > On 2021/6/11 18:32, Will Deacon wrote:
> > > > On Wed, Jun 09, 2021 at 08:54:38PM +0800, Zhen Lei
On 2021-06-15 12:34, Will Deacon wrote:
On Tue, Jun 15, 2021 at 07:22:10PM +0800, Leizhen (ThunderTown) wrote:
On 2021/6/11 18:32, Will Deacon wrote:
On Wed, Jun 09, 2021 at 08:54:38PM +0800, Zhen Lei wrote:
Fixes scripts/checkpatch.pl warning:
WARNING: Possible unnecessary 'out of memory'
Hi Krishna,
On 2021-06-14 23:18, Krishna Reddy wrote:
Right but we won't know until we profile the specific usecases or try
them in
generic workload to see if they affect the performance. Sure, over
invalidation is
a concern where multiple buffers can be mapped to same context and the
cache
On Tue, Jun 15, 2021 at 12:34:17PM +0100, Will Deacon wrote:
> On Tue, Jun 15, 2021 at 07:22:10PM +0800, Leizhen (ThunderTown) wrote:
> >
> >
> > On 2021/6/11 18:32, Will Deacon wrote:
> > > On Wed, Jun 09, 2021 at 08:54:38PM +0800, Zhen Lei wrote:
> > >> Fixes scripts/checkpatch.pl warning:
> >
On Tue, Jun 15, 2021 at 07:22:10PM +0800, Leizhen (ThunderTown) wrote:
>
>
> On 2021/6/11 18:32, Will Deacon wrote:
> > On Wed, Jun 09, 2021 at 08:54:38PM +0800, Zhen Lei wrote:
> >> Fixes scripts/checkpatch.pl warning:
> >> WARNING: Possible unnecessary 'out of memory' message
> >>
> >> Remove
On 2021-06-07 19:25, Nadav Amit wrote:
From: Nadav Amit
On virtual machines, software must flush the IOTLB after each page table
entry update.
The iommu_map_sg() code iterates through the given scatter-gather list
and invokes iommu_map() for each element in the scatter-gather list,
which
On 2021/6/11 18:32, Will Deacon wrote:
> On Wed, Jun 09, 2021 at 08:54:38PM +0800, Zhen Lei wrote:
>> Fixes scripts/checkpatch.pl warning:
>> WARNING: Possible unnecessary 'out of memory' message
>>
>> Remove it can help us save a bit of memory.
>>
>> Signed-off-by: Zhen Lei
>> ---
>>
On 2021-06-07 19:25, Nadav Amit wrote:
From: Robin Murphy
The Mediatek driver is not the only one which might want a basic
address-based gathering behaviour, so although it's arguably simple
enough to open-code, let's factor it out for the sake of cleanliness.
Let's also take this opportunity
On Fri, Jun 11, 2021 at 09:50:31AM -0700, Nadav Amit wrote:
>
>
> > On Jun 11, 2021, at 6:57 AM, Will Deacon wrote:
> >
> > On Mon, Jun 07, 2021 at 11:25:39AM -0700, Nadav Amit wrote:
> >> From: Nadav Amit
> >>
> >> Refactor iommu_iotlb_gather_add_page() and factor out the logic that
> >>
Hi, Jason,
> From: Jason Gunthorpe
> Sent: Thursday, June 3, 2021 9:05 PM
>
> On Thu, Jun 03, 2021 at 06:39:30AM +, Tian, Kevin wrote:
> > > > Two helper functions are provided to support VFIO_ATTACH_IOASID:
> > > >
> > > > struct attach_info {
> > > > u32 ioasid;
On 2021-06-15 08:26, Lu Baolu wrote:
Hi John,
On 6/14/21 4:03 PM, John Garry wrote:
On 12/06/2021 03:14, Lu Baolu wrote:
On 2021/6/11 20:20, John Garry wrote:
diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig
index 2a71347611d4..4467353f981b 100644
--- a/drivers/iommu/Kconfig
+++
On Mon, Jun 14, 2021 at 6:51 PM Shameerali Kolothum Thodi
wrote:
>
>
>
> > -Original Message-
> > From: Robin Murphy [mailto:robin.mur...@arm.com]
> > Sent: 14 June 2021 11:06
> > To: Shameerali Kolothum Thodi ;
> > linux-arm-ker...@lists.infradead.org; linux-a...@vger.kernel.org;
> >
Hi John,
On 6/14/21 4:03 PM, John Garry wrote:
On 12/06/2021 03:14, Lu Baolu wrote:
On 2021/6/11 20:20, John Garry wrote:
diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig
index 2a71347611d4..4467353f981b 100644
--- a/drivers/iommu/Kconfig
+++ b/drivers/iommu/Kconfig
@@ -94,6 +94,7
Hi Christoph,
On 14.06.2021 17:36, Christoph Hellwig wrote:
> On Mon, Jun 14, 2021 at 04:34:05PM +0100, Robin Murphy wrote:
>>> Looking at the rmem_dma_device_init() -> dma_init_coherent_memory(), it
>>> ends up calling memremap(MEMREMAP_WC) which would warn if it intersects
>>> with system RAM
On 6/14/21 10:57 PM, Robin Murphy wrote:
Consolidating the flush queue logic also meant that the "iommu.strict"
option started taking effect on x86 as well. Make sure we document that.
Fixes: a250c23f15c2 ("iommu: remove DOMAIN_ATTR_DMA_USE_FLUSH_QUEUE")
Signed-off-by: Robin Murphy
---
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