Add support for allocating physically contiguous DMA buffers on arm64
systems with an IOMMU. This can be useful when two or more devices
with different memory requirements are involved in buffer sharing.
Note that as this uses the CMA allocator, setting the
DMA_ATTR_FORCE_CONTIGUOUS attribute has
Hi Magnus,
On Mon, Jun 6, 2016 at 5:58 AM, Magnus Damm wrote:
> From: Magnus Damm
>
> Hook up IOMMU_OF_DECLARE() support in case CONFIG_IOMMU_DMA
> is enabled. The only current supported case for 32-bit ARM
> is disabled, however for 64-bit ARM this is required.
>
> Signed-off-by: Magnus Damm
>
Hi Joerg,
On 2017-02-06 17:10, Joerg Roedel wrote:
From: Joerg Roedel
Register Exynos IOMMUs to the IOMMU core and make them
visible in sysfs. This patch does not add the links between
IOMMUs and translated devices yet.
Cc: Marek Szyprowski
Cc: linux-arm-ker...@lists.infradead.org
Cc: linux-
From: Suravee Suthikulpanit
Add multi-IOMMU support for perf by exposing an AMD IOMMU PMU
for each IOMMU found in the system via:
/bus/event_source/devices/amd_iommu_x
where x is the IOMMU index. This allows users to specify
different events to be programmed onto performance counters
of each
From: Suravee Suthikulpanit
Introduce static amd_iommu_attr_groups to simplify the
sysfs attributes initialization code.
Cc: Peter Zijlstra
Cc: Borislav Petkov
Signed-off-by: Suravee Suthikulpanit
---
arch/x86/events/amd/iommu.c | 81 ++---
1 file chan
Declare pr_fmt for perf/amd_iommu and remove unnecessary pr_debug.
Also check return value when _init_events_attrs fails.
Cc: Peter Zijlstra
Cc: Borislav Petkov
Signed-off-by: Suravee Suthikulpanit
---
arch/x86/events/amd/iommu.c | 20
1 file changed, 8 insertions(+), 12
Currently, amd_iommu_pc_get_max_[banks|counters]() use end-point
device ID to locate an IOMMU and check the reported max banks/counters.
The logic assumes that the IOMMU_BASE_DEVID belongs to the first IOMMU,
and uses it to acquire a reference to the first IOMMU, which does not work
on certain syst
Fix coding style and make use of GENMASK_ULL macro.
Cc: Peter Zijlstra
Cc: Borislav Petkov
Cc: Joerg Roedel
Signed-off-by: Suravee Suthikulpanit
---
arch/x86/events/amd/iommu.c | 16 ++--
1 file changed, 6 insertions(+), 10 deletions(-)
diff --git a/arch/x86/events/amd/iommu.c b/
Introduce amd_iommu_get_num_iommus(), which returns the value of
amd_iommus_present. The function is used to replace direct access to
the variable, which is now declared as static.
This function will also be used by Perf AMD IOMMU driver.
Cc: Borislav Petkov
Cc: Joerg Roedel
Signed-off-by: Sura
From: Suravee Suthikulpanit
Clean up register initialization and make use of BIT_ULL(x)
where appropriate. This should not affect logic and functionality.
Cc: Peter Zijlstra
Cc: Borislav Petkov
Signed-off-by: Suravee Suthikulpanit
---
arch/x86/events/amd/iommu.c | 18 +-
1 fi
From: Suravee Suthikulpanit
The current amd_iommu_pc_get_set_reg_val() cannot support multiple IOMMUs.
So, modify it to allow callers to specify IOMMU. This prepares the driver
for supporting multi-IOMMU in subsequent patch.
Cc: Peter Zijlstra
Cc: Borislav Petkov
Cc: Joerg Roedel
Signed-off-b
From: Suravee Suthikulpanit
This patch series modifies the existing IOMMU and Perf drivers to support
systems with multiple IOMMUs by allocating an amd_iommu PMU per IOMMU instance.
This allows users to specify performance events and filters separately for each
IOMMU.
This has been tested on the
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