linux-toradex.git/include/linux/dmar.h, branch v4.8-rc1

iommu: dmar: Provide helper to copy shared irte fields

2015-06-12T09:33:52+00:00

Instead of open coding, provide a helper function to copy the shared
irte fields.

Signed-off-by: Thomas Gleixner 
Cc: jiang.liu@linux.intel.com
Cc: iommu@lists.linux-foundation.org
Cc: joro@8bytes.org
Cc: dwmw2@infradead.org
Link: http://lkml.kernel.org/r/1433827237-3382-4-git-send-email-feng.wu@intel.com
Signed-off-by: Thomas Gleixner

iommu: dmar: Extend struct irte for VT-d Posted-Interrupts

2015-06-12T09:33:51+00:00

The IRTE (Interrupt Remapping Table Entry) is either an entry for
remapped or for posted interrupts. The hardware distiguishes between
remapped and posted entries by bit 15 in the low 64 bit of the
IRTE. If cleared the entry is remapped, if set it's posted.

The entries have common fields and dependent on the posted bit fields
with different meanings.

Extend struct irte to handle the differences between remap and posted
mode by having three structs in the unions:

        - Shared
        - Remapped
        - Posted

Signed-off-by: Thomas Gleixner 
Signed-off-by: Feng Wu 
Acked-by: Joerg Roedel 
Cc: jiang.liu@linux.intel.com
Cc: iommu@lists.linux-foundation.org
Cc: dwmw2@infradead.org
Link: http://lkml.kernel.org/r/1433827237-3382-3-git-send-email-feng.wu@intel.com
Signed-off-by: Thomas Gleixner

iommu/vt-d: Refine the interfaces to create IRQ for DMAR unit

2015-04-24T13:36:49+00:00

Refine the interfaces to create IRQ for DMAR unit. It's a preparation
for converting DMAR IRQ to hierarchical irqdomain on x86.

It also moves dmar_alloc_hwirq()/dmar_free_hwirq() from irq_remapping.h
to dmar.h. They are not irq_remapping specific.

Signed-off-by: Jiang Liu 
Cc: Konrad Rzeszutek Wilk 
Cc: David Cohen 
Cc: Sander Eikelenboom 
Cc: David Vrabel 
Cc: Greg Kroah-Hartman 
Cc: iommu@lists.linux-foundation.org
Cc: Vinod Koul 
Cc: Bjorn Helgaas 
Cc: Benjamin Herrenschmidt 
Cc: Rafael J. Wysocki 
Cc: Randy Dunlap 
Cc: Yinghai Lu 
Cc: Borislav Petkov 
Cc: Dimitri Sivanich 
Cc: Tony Luck 
Cc: Fenghua Yu 
Cc: Joerg Roedel 
Link: http://lkml.kernel.org/r/1428905519-23704-20-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner

iommu/vt-d: Implement DMAR unit hotplug framework

2014-11-18T10:18:35+00:00

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 Specification
Rev 2.2", ACPI BIOS should implement ACPI _DSM method under the ACPI
object for the PCI host bridge to support DMAR hotplug.

This patch introduces interfaces to parse ACPI _DSM method for
DMAR unit hotplug. It also implements state machines for DMAR unit
hot-addition and hot-removal.

The PCI host bridge hotplug driver should call dmar_hotplug_hotplug()
before scanning PCI devices connected for hot-addition and after
destroying all PCI devices for hot-removal.

Signed-off-by: Jiang Liu 
Reviewed-by: Yijing Wang 
Signed-off-by: Joerg Roedel

iommu/vt-d: Dynamically allocate and free seq_id for DMAR units

2014-11-18T10:18:35+00:00

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 
Reviewed-by: Yijing Wang 
Signed-off-by: Joerg Roedel

iommu/vt-d: Introduce helper function dmar_walk_resources()

2014-11-18T10:18:35+00:00

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 
Signed-off-by: Joerg Roedel

iommu/vt-d: Store bus information in RMRR PCI device path

2014-10-02T10:12:25+00:00

This will be used later to match broken RMRR entries.

Signed-off-by: Joerg Roedel

iommu/vt-d: Simplify include/linux/dmar.h

2014-07-23T14:04:47+00:00

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 
Signed-off-by: Joerg Roedel

iommu/vt-d: Change scope lists to struct device, bus, devfn

2014-03-24T14:05:08+00:00

It's not only for PCI devices any more, and the scope information for an
ACPI device provides the bus and devfn so that has to be stored here too.

It is the device pointer itself which needs to be protected with RCU,
so the __rcu annotation follows it into the definition of struct
dmar_dev_scope, since we're no longer just passing arrays of device
pointers around.

Signed-off-by: David Woodhouse

iommu/vt-d: Unify the way to process DMAR device scope array

2014-03-04T16:51:06+00:00

Now we have a PCI bus notification based mechanism to update DMAR
device scope array, we could extend the mechanism to support boot
time initialization too, which will help to unify and simplify
the implementation.

Signed-off-by: Jiang Liu 
Signed-off-by: Joerg Roedel