On 11.01.2017 10:41, Eric Auger wrote:
From: Robin Murphy
IOMMU domain users such as VFIO face a similar problem to DMA API ops
with regard to mapping MSI messages in systems where the MSI write is
subject to IOMMU translation. With the relevant infrastructure now in
place for managed DMA domai
On 11.01.2017 10:41, Eric Auger wrote:
We want to extend the callbacks used for dm regions and
use them for reserved regions. Reserved regions can be
- directly mapped regions
- regions that cannot be iommu mapped (PCI host bridge windows, ...)
- MSI regions (because they belong to another addres
On 11.01.2017 10:41, Eric Auger wrote:
Introduce a new helper serving the purpose to allocate a reserved
region. This will be used in iommu driver implementing reserved
region callbacks.
Signed-off-by: Eric Auger
Reviewed-by: Tomasz Nowicki
Thanks,
Tomasz
---
v3 -> v4:
- add INIT_LIST_H
On 11.01.2017 10:41, Eric Auger wrote:
As we introduced new reserved region types which do not require
mapping, let's make sure we only map direct mapped regions.
Signed-off-by: Eric Auger
Reviewed-by: Tomasz Nowicki
Thanks,
Tomasz
---
v3 -> v4:
- use region's type and reword commit mes
On 11.01.2017 10:41, Eric Auger wrote:
Introduce iommu_get_group_resv_regions whose role consists in
enumerating all devices from the group and collecting their
reserved regions. The list is sorted and overlaps between
regions of the same type are handled by merging the regions.
Signed-off-by: E
On 11.01.2017 10:41, Eric Auger wrote:
The get() populates the list with the MSI IOVA reserved window.
At the moment an arbitray MSI IOVA window is set at 0x800
of size 1MB. This will allow to report those info in iommu-group
sysfs.
Signed-off-by: Eric Auger
Reviewed-by: Tomasz Nowicki
On 11.01.2017 10:41, Eric Auger wrote:
This new function checks whether all MSI irq domains
implement IRQ remapping. This is useful to understand
whether VFIO passthrough is safe with respect to interrupts.
On ARM typically an MSI controller can sit downstream
to the IOMMU without preventing VFI
Hi Tomasz,
On 17/01/2017 14:40, Tomasz Nowicki wrote:
> On 11.01.2017 10:41, Eric Auger wrote:
>> This new function checks whether all MSI irq domains
>> implement IRQ remapping. This is useful to understand
>> whether VFIO passthrough is safe with respect to interrupts.
>>
>> On ARM typically an
On 17.01.2017 14:53, Auger Eric wrote:
Hi Tomasz,
On 17/01/2017 14:40, Tomasz Nowicki wrote:
On 11.01.2017 10:41, Eric Auger wrote:
This new function checks whether all MSI irq domains
implement IRQ remapping. This is useful to understand
whether VFIO passthrough is safe with respect to interr
On 11.01.2017 10:41, Eric Auger wrote:
iommu/arm-smmu: Implement reserved region get/put callbacks
The get() populates the list with the MSI IOVA reserved window.
At the moment an arbitray MSI IOVA window is set at 0x800
of size 1MB. This will allow to report those info in iommu-group
sysfs
Enable the Extended Stream ID feature when available.
This patch on top of series "KVM PCIe/MSI passthrough on ARM/ARM64
and IOVA reserved regions" by Eric Auger [1] allows to passthrough
an external PCIe network card on a ThunderX server successfully.
Without this patch that card caused a warnin
On Mon, Jan 16, 2017 at 01:23:27AM -0600, Suthikulpanit, Suravee wrote:
> Suravee Suthikulpanit (9):
> perf/amd/iommu: Declare pr_fmt and remove unnecessary pr_debug
> perf/amd/iommu: Clean up perf_iommu_enable_event
> perf/amd/iommu: Misc fix up perf_iommu_read
> iommu/amd: Introduce amd_i
On Mon, Jan 16, 2017 at 12:58:07PM +, Robin Murphy wrote:
> We wouldn't normally expect ops->attach_dev() to fail, but on IOMMUs
> with limited hardware resources, or generally misconfigured systems,
> it is certainly possible. We report failure correctly from the external
> iommu_attach_device
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