On Mon, 2 Jun 2014 21:28:42 -0700
Greg KH wrote:
> On Mon, Jun 02, 2014 at 07:42:58PM -0500, Kim Phillips wrote:
> > You are the platform driver core maintainer: can you apply this to
> > your driver-core tree now?
>
> Yes, I will after this merge window ends, it's too late for 3.16-rc1
> with t
> iommu/vt-d: match segment number when searching for dev_iotlb capable
> devices
> iommu/vt-d: use correct domain id to flush virtual machine domains
> iommu/vt-d: introduce helper functions to improve code readability
> iommu/vt-d: introduce helper functions to make code symmetric for
On Wed, Jun 25, 2014 at 11:12:13AM +0100, Arnd Bergmann wrote:
> On Wednesday 25 June 2014 10:57:36 Will Deacon wrote:
> > So far, I've been avoiding the hardcoding. However, you could potentially
> > build a system with a small number of SMRs (compared to the number of
> > StreamIDs) and allocate
On Wednesday 25 June 2014 10:57:36 Will Deacon wrote:
> So far, I've been avoiding the hardcoding. However, you could potentially
> build a system with a small number of SMRs (compared to the number of
> StreamIDs) and allocate the StreamIDs in such a way that I think the dynamic
> configuration wo
On Wed, Jun 25, 2014 at 10:48:31AM +0100, Arnd Bergmann wrote:
> On Wednesday 25 June 2014 10:38:25 Will Deacon wrote:
> > On Wed, Jun 25, 2014 at 10:27:50AM +0100, Arnd Bergmann wrote:
> > > I think the situation is a bit different here: It's less about the corner
> > > cases for the SMMU, but abo
On Wednesday 25 June 2014 10:38:25 Will Deacon wrote:
> On Wed, Jun 25, 2014 at 10:27:50AM +0100, Arnd Bergmann wrote:
> > On Wednesday 25 June 2014 10:17:02 Will Deacon wrote:
> > > On Tue, Jun 24, 2014 at 07:20:56PM +0100, Arnd Bergmann wrote:
> > > > On Tuesday 24 June 2014 19:11:50 Will Deacon
On Wed, Jun 25, 2014 at 10:27:50AM +0100, Arnd Bergmann wrote:
> On Wednesday 25 June 2014 10:17:02 Will Deacon wrote:
> > On Tue, Jun 24, 2014 at 07:20:56PM +0100, Arnd Bergmann wrote:
> > > On Tuesday 24 June 2014 19:11:50 Will Deacon wrote:
> > > > On Tue, Jun 24, 2014 at 06:57:44PM +0100, Olav
On Wednesday 25 June 2014 10:17:02 Will Deacon wrote:
> On Tue, Jun 24, 2014 at 07:20:56PM +0100, Arnd Bergmann wrote:
> > On Tuesday 24 June 2014 19:11:50 Will Deacon wrote:
> > > On Tue, Jun 24, 2014 at 06:57:44PM +0100, Olav Haugan wrote:
> > > > We do describe the masked StreamID (SID) but we n
On Tue, Jun 24, 2014 at 10:35:54PM +0100, Olav Haugan wrote:
> On 6/24/2014 11:11 AM, Will Deacon wrote:
> > On Tue, Jun 24, 2014 at 06:57:44PM +0100, Olav Haugan wrote:
> >> On 6/24/2014 2:18 AM, Will Deacon wrote:
> >>> On Sat, Jun 21, 2014 at 12:16:25AM +0100, Olav Haugan wrote:
> We have m
On Tue, Jun 24, 2014 at 07:20:56PM +0100, Arnd Bergmann wrote:
> On Tuesday 24 June 2014 19:11:50 Will Deacon wrote:
> > On Tue, Jun 24, 2014 at 06:57:44PM +0100, Olav Haugan wrote:
> > > We do describe the masked StreamID (SID) but we need to specify the mask
> > > that the SMMU should apply to th
Finally enhance pci_root driver to support DMAR device hotplug when
hot-plugging PCI host bridges.
Signed-off-by: Jiang Liu
---
drivers/acpi/pci_root.c | 16 ++--
1 file changed, 14 insertions(+), 2 deletions(-)
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index
Enhance error recovery in function intel_enable_irq_remapping()
by tearing down all created data structures.
Signed-off-by: Jiang Liu
---
drivers/iommu/intel_irq_remapping.c |8 +---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/iommu/intel_irq_remapping.c
b/driv
Implement required callback functions for intel-iommu driver
to support DMAR unit hotplug.
Signed-off-by: Jiang Liu
---
drivers/iommu/intel-iommu.c | 206 +++
1 file changed, 151 insertions(+), 55 deletions(-)
diff --git a/drivers/iommu/intel-iommu.c b/d
On Intel platforms, an IO Hub (PCI/PCIe host bridge) may contain DMAR
units, so we need to support DMAR hotplug when supporting PCI host
bridge hotplug on Intel platforms.
According to Section 8.8 "Remapping Hardware Unit Hot Plug" in "Intel
Virtualization Technology for Directed IO Architecture S
According to Intel VT-d specification, _DSM method to support DMAR
hotplug should exist directly under corresponding ACPI object
representing PCI host bridge. But some BIOSes doesn't conform to
this, so search for _DSM method in the subtree starting from the
ACPI object representing the PCI host br
Introduce intel_unmap() to reduce duplicated code in intel_unmap_sg()
and intel_unmap_page().
Also let dma_pte_free_pagetable() to call dma_pte_clear_range() directly,
so caller only needs to call dma_pte_free_pagetable().
Signed-off-by: Jiang Liu
---
drivers/iommu/intel-iommu.c | 70
Introduce helper function domain_pfn_within_range() to simplify code
and improve readability.
Signed-off-by: Jiang Liu
---
drivers/iommu/intel-iommu.c | 30 --
1 file changed, 16 insertions(+), 14 deletions(-)
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iomm
Implement required callback functions for intel_irq_remapping driver
to support DMAR unit hotplug.
Signed-off-by: Jiang Liu
---
drivers/iommu/intel_irq_remapping.c | 222 ++-
1 file changed, 169 insertions(+), 53 deletions(-)
diff --git a/drivers/iommu/intel_irq
Introduce domain_type_is_vm() and domain_type_is_vm_or_si() to improve
code readability.
Also kill useless macro DOMAIN_FLAG_P2P_MULTIPLE_DEVICES.
Signed-off-by: Jiang Liu
---
drivers/iommu/intel-iommu.c | 59 +++
1 file changed, 26 insertions(+), 33 de
Introduce functions to support dynamic IOMMU seq_id allocating and
releasing, which will be used to support DMAR hotplug.
Also rename IOMMU_UNITS_SUPPORTED as DMAR_UNITS_SUPPORTED.
Signed-off-by: Jiang Liu
---
drivers/iommu/dmar.c| 40 ++--
drivers/
Simplify include/linux/dmar.h a bit based on the fact that
both CONFIG_INTEL_IOMMU and CONFIG_IRQ_REMAP select CONFIG_DMAR_TABLE.
Signed-off-by: Jiang Liu
---
include/linux/dmar.h | 50 ++
1 file changed, 18 insertions(+), 32 deletions(-)
diff -
Virtual machine domains are created by intel_iommu_domain_init() and
should be destroyed by intel_iommu_domain_destroy(). So avoid freeing
virtual machine domain data structure in free_dmar_iommu() when
doamin->iommu_count reaches zero, otherwise it may cause invalid
memory access because the IOMMU
Simplify error handling path by changing iommu_{enable|disable}_translation
to return void.
Signed-off-by: Jiang Liu
---
drivers/iommu/intel-iommu.c | 18 +-
1 file changed, 5 insertions(+), 13 deletions(-)
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
Static identity and virtual machine domains may be cached in
iommu->domain_ids array after corresponding IOMMUs have been removed
from domain->iommu_bmp. So we should check domain->iommu_bmp before
decreasing domain->iommu_count in function free_dmar_iommu(), otherwise
it may cause free of inuse do
Introduce helper function dmar_walk_resources to walk resource entries
in DMAR table and ACPI buffer object returned by ACPI _DSM method
for IOMMU hot-plug.
Signed-off-by: Jiang Liu
---
drivers/iommu/dmar.c| 208 +++
drivers/iommu/intel-iommu.c |
Introduce domain_attach_iommu()/domain_detach_iommu() and refine
iommu_attach_domain()/iommu_detach_domain() to make code symmetric
and improve readability.
Signed-off-by: Jiang Liu
---
drivers/iommu/intel-iommu.c | 146 ---
1 file changed, 80 insertions(
Signed-off-by: Jiang Liu
---
drivers/iommu/intel-iommu.c |7 +++
include/linux/iova.h|5 +
2 files changed, 8 insertions(+), 4 deletions(-)
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 0d34f33bea34..d94468ae2947 100644
--- a/drivers/iommu/i
IOMMU units may dynamically attached to/detached from domains,
so we should scan all active IOMMU units when computing iommu_snooping
flag for a domain instead of only scanning IOMMU units associated
with the domain.
Also check snooping and superpage capabilities when hot-adding DMAR units.
Signe
For virtual machine domains, domain->id is a virtual id, and the real
domain id written into context entry is dynamically allocated.
So use the real domain id instead of domain->id when flushing iotlbs
for virtual machine domains.
Signed-off-by: Jiang Liu
---
drivers/iommu/intel-iommu.c |2 +
Check the same domain id is allocated for si_domain on each IOMMU,
otherwise the IOTLB flush for si_domain will fail.
Now the rules to allocate and manage domain id are:
1) For normal and static identity domains, domain id is allocated
when creating domain structure. And this id will be written
When hot plugging a descrete IOH or a physical processor with embedded
IIO, we need to handle DMAR(or IOMMU) unit in the PCIe host bridge if
DMAR is in use. This patch set tries to enhance current DMAR/IOMMU/IR
drivers to support hotplug and is based on latest mainstream kernel
v3.16-rc2.
Patch 1-
For virtual machine and static identity domains, there may be devices
from different PCI segments associated with the same domain.
So function iommu_support_dev_iotlb() should also match PCI segment
number (iommu unit) when searching for dev_iotlb capable devices.
Signed-off-by: Jiang Liu
---
dr
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