On Fri, Feb 15, 2019 at 8:06 AM Souptick Joarder wrote:
>
> Previouly drivers have their own way of mapping range of
> kernel pages/memory into user vma and this was done by
> invoking vm_insert_page() within a loop.
>
> As this pattern is common across different drivers, it can
> be generalized b
Hi Laurent,
On Wed, Feb 20, 2019 at 5:11 PM Laurent Pinchart
wrote:
> On Wed, Feb 20, 2019 at 05:05:49PM +0100, Geert Uytterhoeven wrote:
> > On Wed, Feb 20, 2019 at 4:42 PM Laurent Pinchart wrote:
> > > On Wed, Feb 20, 2019 at 04:05:31PM +0100, Geert Uytterhoeven wrote:
> > >> During PSCI system
Commit 57384592c433 ("iommu/vt-d: Store bus information in RMRR PCI
device path") changed the type of the path data, however, the change in
path type was not reflected in size calculations. Update to use the
correct type and prevent a buffer overflow.
This bug manifests in systems with deep PCI h
On Wed, Feb 20, 2019 at 10:46:31AM -0600, Julia Cartwright wrote:
> Commit 57384592c433 ("iommu/vt-d: Store bus information in RMRR PCI
> device path") changed the type of the path data, however, the change in
> path type was not reflected in size calculations. Update to use the
> correct type and
Hi Geert,
On Wed, Feb 20, 2019 at 05:05:49PM +0100, Geert Uytterhoeven wrote:
> On Wed, Feb 20, 2019 at 4:42 PM Laurent Pinchart wrote:
> > On Wed, Feb 20, 2019 at 04:05:31PM +0100, Geert Uytterhoeven wrote:
> >> During PSCI system suspend, R-Car Gen3 SoCs are powered down, and all
> >> IPMMU stat
Hi Laurent,
On Wed, Feb 20, 2019 at 4:42 PM Laurent Pinchart
wrote:
> On Wed, Feb 20, 2019 at 04:05:31PM +0100, Geert Uytterhoeven wrote:
> > During PSCI system suspend, R-Car Gen3 SoCs are powered down, and all
> > IPMMU state is lost. Hence after s2ram, devices wired behind an IPMMU,
> > and c
Hi Laurent,
On Wed, Feb 20, 2019 at 4:35 PM Laurent Pinchart
wrote:
> On Wed, Feb 20, 2019 at 04:05:30PM +0100, Geert Uytterhoeven wrote:
> > ipmmu_domain_init_context() takes care of (1) initializing the software
> > domain, and (2) initializing the hardware context for the domain.
> >
> > Extra
Hi Geert,
Thank you for the patch.
On Wed, Feb 20, 2019 at 04:05:29PM +0100, Geert Uytterhoeven wrote:
> The maximum number of micro-TLBs per IPMMU instance is not fixed, but
> depends on the SoC type. Hence move it from struct ipmmu_vmsa_device to
> struct ipmmu_features, and set up the correct
Hi Geert,
Thank you for the patch.
On Wed, Feb 20, 2019 at 04:05:31PM +0100, Geert Uytterhoeven wrote:
> During PSCI system suspend, R-Car Gen3 SoCs are powered down, and all
> IPMMU state is lost. Hence after s2ram, devices wired behind an IPMMU,
> and configured to use it, will see their DMA o
Hi Laurent,
On Wed, Feb 20, 2019 at 4:31 PM Laurent Pinchart
wrote:
> On Wed, Feb 20, 2019 at 04:05:27PM +0100, Geert Uytterhoeven wrote:
> > On R-Car Gen3, the faulting virtual address is a 40-bit address, and
> > comprised of two registers. Read the upper address part, and combine
> > both par
Hi Geert,
Thank you for the patch.
On Wed, Feb 20, 2019 at 04:05:30PM +0100, Geert Uytterhoeven wrote:
> ipmmu_domain_init_context() takes care of (1) initializing the software
> domain, and (2) initializing the hardware context for the domain.
>
> Extract the code to initialize the hardware con
Hi Geert,
Thank you for the patch.
On Wed, Feb 20, 2019 at 04:05:27PM +0100, Geert Uytterhoeven wrote:
> On R-Car Gen3, the faulting virtual address is a 40-bit address, and
> comprised of two registers. Read the upper address part, and combine
> both parts, when running on a 64-bit system.
>
>
Hi Geert,
Thank you for the patch.
On Wed, Feb 20, 2019 at 04:05:28PM +0100, Geert Uytterhoeven wrote:
> Make the IPMMU_CTX_MAX constant unsigned, to match the type of
> ipmmu_features.number_of_contexts.
>
> This allows to use plain min() instead of type-casting min_t().
>
> Signed-off-by: Gee
Hi Geert,
Thank you for the patch.
On Wed, Feb 20, 2019 at 04:05:26PM +0100, Geert Uytterhoeven wrote:
> There is a helper to write to the root IPMMU instance's registers, so
> let's use it.
>
> Signed-off-by: Geert Uytterhoeven
> ---
> drivers/iommu/ipmmu-vmsa.c | 3 +--
> 1 file changed, 1 i
Hi Geert,
Thank you for the patch.
On Wed, Feb 20, 2019 at 04:05:25PM +0100, Geert Uytterhoeven wrote:
> As of commit 7af9a5fdb9e0ca33 ("iommu/ipmmu-vmsa: Use
> iommu_device_sysfs_add()/remove()"), IOMMU devices show up under
> /sys/class/iommus/, but their "devices" subdirectories are empty.
> L
On Mon, Feb 18, 2019 at 9:48 AM Dave Young wrote:
>
> On 02/15/19 at 11:24am, Borislav Petkov wrote:
> > On Tue, Feb 12, 2019 at 04:48:16AM +0800, Dave Young wrote:
> > > Even we make it automatic in kernel, but we have to have some default
> > > value for swiotlb in case crashkernel can not find
On Wed, Feb 20, 2019 at 5:41 PM Dave Young wrote:
>
> On 02/20/19 at 09:32am, Borislav Petkov wrote:
> > On Mon, Feb 18, 2019 at 09:48:20AM +0800, Dave Young wrote:
> > > It is ideal if kernel can do it automatically, but I'm not sure if
> > > kernel can predict the swiotlb reserved size automatic
As of commit 7af9a5fdb9e0ca33 ("iommu/ipmmu-vmsa: Use
iommu_device_sysfs_add()/remove()"), IOMMU devices show up under
/sys/class/iommus/, but their "devices" subdirectories are empty.
Likewise, devices tied to an IOMMU do not have an "iommu" backlink.
Make sure all links are created, on both arm3
During PSCI system suspend, R-Car Gen3 SoCs are powered down, and all
IPMMU state is lost. Hence after s2ram, devices wired behind an IPMMU,
and configured to use it, will see their DMA operations hang.
To fix this, restore all IPMMU contexts, and re-enable all active
micro-TLBs during system res
Hi Jörg, Magnus,
On R-Car Gen3 systems with PSCI, PSCI may power down the SoC during
system suspend, thus losing all IOMMU state. Hence after s2ram, devices
behind an IPMMU (e.g. SATA), and configured to use it, will fail to
complete their I/O operations.
This patch series adds suspend/r
There is a helper to write to the root IPMMU instance's registers, so
let's use it.
Signed-off-by: Geert Uytterhoeven
---
drivers/iommu/ipmmu-vmsa.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/iommu/ipmmu-vmsa.c b/drivers/iommu/ipmmu-vmsa.c
index 9f2b781e20a0eba
The maximum number of micro-TLBs per IPMMU instance is not fixed, but
depends on the SoC type. Hence move it from struct ipmmu_vmsa_device to
struct ipmmu_features, and set up the correct value for both R-Car Gen2
and Gen3 SoCs.
Note that currently no code uses this value.
Signed-off-by: Geert U
ipmmu_domain_init_context() takes care of (1) initializing the software
domain, and (2) initializing the hardware context for the domain.
Extract the code to initialize the hardware context into a new subroutine
ipmmu_context_init(), to prepare for later reuse.
Signed-off-by: Geert Uytterhoeven
On R-Car Gen3, the faulting virtual address is a 40-bit address, and
comprised of two registers. Read the upper address part, and combine
both parts, when running on a 64-bit system.
Signed-off-by: Geert Uytterhoeven
---
Apart from this, the driver doesn't support 40-bit IOVA addresses yet.
---
Make the IPMMU_CTX_MAX constant unsigned, to match the type of
ipmmu_features.number_of_contexts.
This allows to use plain min() instead of type-casting min_t().
Signed-off-by: Geert Uytterhoeven
---
drivers/iommu/ipmmu-vmsa.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --g
Add bind() and unbind() operations to the IOMMU API. Bind() returns a
PASID to the device driver (by convention, a 20-bit system-wide ID
representing the address space). When programming DMA addresses, device
drivers include this PASID in a device-specific manner, to let the device
access the given
This series focuses on the device driver API for SVA, as I'd like to get
at least parts of it merged in v5.2 [1]. If we can get consensus on the
interface, it will be easier for device drivers to start adding SVA
support while we're improving the IOMMU side.
Since v3 [2] I changed the interface as
Hi powerpc maintainers,
what is the plan for this serries? I've not received any comments,
and although the series briefly appeared in the powerpc next-test
branch it disappeared again..
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20.02.2019 16:00, Geert Uytterhoeven пишет:
> Add missing kerneldoc for iommu_ops.iotlb_sync_map().
>
> Fixes: 1d7ae53b152dbc5b ("iommu: Introduce iotlb_sync_map callback")
> Signed-off-by: Geert Uytterhoeven
> ---
> include/linux/iommu.h | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a
Hi Jörg,
This series contains a fix for an incorrect kerneldoc parameter, and
adds the missing kerneldoc for two recently added IOMMU methods.
Thanks!
Geert Uytterhoeven (3):
iommu: Fix kerneldoc for iommu_ops.flush_iotlb_all()
iommu: Document iommu_ops.iotlb_sync_map()
iommu: Docu
Add missing kerneldoc for iommu_ops.is_attach_deferred().
Fixes: e01d1913b0d08171 ("iommu: Add is_attach_deferred call-back to iommu-ops")
Signed-off-by: Geert Uytterhoeven
---
include/linux/iommu.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/include/linux/iommu.h b/include/linux/iommu
Add missing kerneldoc for iommu_ops.iotlb_sync_map().
Fixes: 1d7ae53b152dbc5b ("iommu: Introduce iotlb_sync_map callback")
Signed-off-by: Geert Uytterhoeven
---
include/linux/iommu.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 848fb0702
While the API wrapper is called iommu_flush_tlb_all(), the actual
iommu_ops method is called .flush_iotlb_all(), not .flush_tlb_all().
Fixes: add02cfdc9bc2987 ("iommu: Introduce Interface for IOMMU TLB Flushing")
Signed-off-by: Geert Uytterhoeven
---
include/linux/iommu.h | 2 +-
1 file changed,
A change made in the final version of IOMMU debugfs support replaced the
public function iommu_debugfs_new_driver_dir() by the public dentry
iommu_debugfs_dir in , but forgot to update both the
implementation in iommu-debugfs.c, and the patch description.
Fix this by exporting iommu_debugfs_dir, a
On 02/20/19 at 09:32am, Borislav Petkov wrote:
> On Mon, Feb 18, 2019 at 09:48:20AM +0800, Dave Young wrote:
> > It is ideal if kernel can do it automatically, but I'm not sure if
> > kernel can predict the swiotlb reserved size automatically.
>
> Do you see how even more absurd this gets?
>
> If
On Tue, 2019-02-19 at 15:33 -0800, Evan Green wrote:
> On Sun, Feb 17, 2019 at 1:09 AM Yong Wu wrote:
> >
> > In the 4GB mode, the physical address is remapped,
> >
> > Here is the detailed remap relationship.
> > CPU PA ->HW PA
> > 0x4000_ 0x1_4000_ (Add bit32)
> > 0x
On Mon, Feb 18, 2019 at 09:48:20AM +0800, Dave Young wrote:
> It is ideal if kernel can do it automatically, but I'm not sure if
> kernel can predict the swiotlb reserved size automatically.
Do you see how even more absurd this gets?
If the kernel cannot know the swiotlb reserved size automatical
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