lkml.org 
[lkml]   [2015]   [May]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    From
    Subject[v8 0/9] Add VT-d Posted-Interrupts support - IOMMU part
    Date
    VT-d Posted-Interrupts is an enhancement to CPU side Posted-Interrupt.
    With VT-d Posted-Interrupts enabled, external interrupts from
    direct-assigned devices can be delivered to guests without VMM
    intervention when guest is running in non-root mode.

    You can find the VT-d Posted-Interrtups Spec. in the following URL:
    http://www.intel.com/content/www/us/en/intelligent-systems/intel-technology/vt-directed-io-spec.html

    This series was part of http://thread.gmane.org/gmane.linux.kernel.iommu/7708. To make things clear, send out IOMMU part here.

    This patch-set is based on the lastest x86/apic branch of tip tree.

    Divide the whole series which contain multiple components into three parts:
    - Prerequisite changes to irq subsystem (already merged in tip tree x86/apic branch)
    - IOMMU part (in this series)
    - KVM and VFIO parts (will send out this part once the first two parts are accepted)

    v7->v8:
    * Save the irq mode (posted or remapped) of an IRTE in struct irq_2_iommu.
    * Use this new mode to decide whether update the hardware when
    modifying irte in intel_ir_set_affinity().

    v6->v7:
    * Add an static inline helper function set_irq_posting_cap() to set
    the PI capability.
    * Add some comments for the new member "ir_data->irte_pi_entry".

    v5->v6:
    * Extend 'struct irte' for VT-d Posted-Interrupts, combine remapped
    and posted mode into one irte structure.

    v4->v5:
    * Abstract modify_irte() to accept two format of irte.

    v3->v4:
    * Change capability to a int variant flags instead of a function call.
    * Add hotplug case for VT-d PI.

    Feng Wu (8):
    iommu: Add new member capability to struct irq_remap_ops
    iommu, x86: Implement irq_set_vcpu_affinity for intel_ir_chip
    iommu, x86: Save the mode (posted or remapped) of an IRTE
    iommu, x86: No need to migrating irq for VT-d Posted-Interrupts
    iommu, x86: Add cap_pi_support() to detect VT-d PI capability
    iommu, x86: Setup Posted-Interrupts capability for Intel iommu
    iommu, x86: define irq_remapping_cap()
    iommu, x86: Properly handler PI for IOMMU hotplug

    Thomas Gleixner (1):
    iommu: dmar: Extend struct irte for VT-d Posted-Interrupts

    arch/x86/include/asm/irq_remapping.h | 11 +++++
    drivers/iommu/intel_irq_remapping.c | 93 +++++++++++++++++++++++++++++++++++-
    drivers/iommu/irq_remapping.c | 11 +++++
    drivers/iommu/irq_remapping.h | 6 +++
    include/linux/dmar.h | 70 +++++++++++++++++++++------
    include/linux/intel-iommu.h | 1 +
    6 files changed, 176 insertions(+), 16 deletions(-)

    --
    2.1.0



    \
     
     \ /
      Last update: 2015-05-27 07:01    [W:3.232 / U:0.656 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site