Signed-off-by: Baoquan He
---
drivers/iommu/amd_iommu_init.c | 26 ++
drivers/iommu/amd_iommu_types.h | 2 ++
2 files changed, 28 insertions(+)
diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c
index 1fc369e..913a718 100644
--- a/drivers/iommu
Signed-off-by: Baoquan He
---
drivers/iommu/amd_iommu.c | 2 +-
drivers/iommu/amd_iommu_init.c | 4 ++--
2 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index f82060e7..0d59f79 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/d
Before old dev tables coping do not touch dev tables if translation is
previously
enabled. And copy the dev tables/command buffer/event buffer from the old kernel
to newly allocated data structure.
Signed-off-by: Baoquan He
---
drivers/iommu/amd_iommu_init.c | 65 ---
Signed-off-by: Baoquan He
---
drivers/iommu/amd_iommu.c | 25 +++--
1 file changed, 19 insertions(+), 6 deletions(-)
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 1e86f4c..f4f3e63 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.
update_domain() is the only place where domain->pt_root will be got and
set into dev entry. So before the device driver initialization we do
nothing if it's in previously enabled translation status.
Signed-off-by: Baoquan He
---
drivers/iommu/amd_iommu.c | 2 +-
1 file changed, 1 insertion(+), 1
In the first
Now any change of domain can be updated to dev tables and io page table
Signed-off-by: Baoquan He
---
drivers/iommu/amd_iommu.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index aee1ae4..1e86f4c 100644
--- a/drivers/io
iommu->first_device/last_device are needed by function init_iommu_from_acpi()
and init_iommu_devices(). So putting the assignment of them in iommu_init_pci()
could be late. In this patch put them earlier.
Signed-off-by: Baoquan He
---
drivers/iommu/amd_iommu_init.c | 10 +++---
1 file change
Copy command buffer and event buffer from the old to kdump kernel.
Still there are 2 problems:
1) Not very sure if this is necessary. If do not copy the old command buffer,
and
only set the newly allocated command buffer, is there anything wrong?
2) If copy is needed, do we need to take care
Add functions to check whether translation is already enabled in IOMMU.
Maybe it need be checked per IOMMU. Currently for debugging I didn't do
like that.
Signed-off-by: Baoquan He
---
drivers/iommu/amd_iommu_init.c | 26 ++
drivers/iommu/amd_iommu_proto.h | 4
2 f
This is a draft patchset trying to fix the issue that AMD IOMMU doesn't
work well in kdump kernel. The patch arrangement is not foraml, just
presenting what I have done and what's the problem being encountered
currently.
It contains 3 parts.
1) Clean up patch
Patch 1/10, 2/10, 3/10 are code cl
The old functon find_last_devid_on_pci not only gets the last devid, but calls
update_last_devid(). Now adjust the function definition to make it be consistent
with its name. Meanwhile add a new function find_first_devid_on_pci for later
use.
Signed-off-by: Baoquan He
---
drivers/iommu/amd_iomm
* Suman Anna [150903 16:01]:
> On 07/23/2015 02:24 AM, Tony Lindgren wrote:
> > OK maybe check the syss/sysc registers involved here for each hardware
> > module here and which driver tinkers with which registers? This will
> > make things a lot easier in the long run for sure.
>
> The OMAP
On 23/09/15 02:55, chenfeng wrote:
Hi all,
In IOMMU architecture , how to make two different peripherals share the same
page table ?
In other words , is there a mechanism or structure to make two peripherals get
completely different address.
eg:
peri-A、peri-B and peri-C share the same iova
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