[PATCH v7 00/28] Add ITS support

[vijay.kilari@gmail.com]

From: Vijaya Kumar K <Vijaya.Kumar@caviumnetworks.com>

This is based on DraftG version
http://xenbits.xen.org/people/ianc/vits/draftG.pdf

Following major features are supported
 - GICv3 ITS support for arm64 platform
 - Only Dom0 is supported. For DomU pci passthrough feature
   is required.

Changes in v7:

 - Rebased to latest staging branch.
 - Compiled all the patches individually for both arm32 and arm64
 - Patch xen-arm-ITS-implement-hw_irq_controller-for-LPIs.patch
   split into two patches.
      - xen-arm-ITS-implement-hw_irq_controller-for-LPIs.patch and
      - xen-arm-ITS-Plumbing-hw_irq_controller-for-LPIs.patch.
 - Moved patch xen-arm-ITS-Add-GITS-registers-emulation.patch
   before vITS compilation.
 - Merged xen-arm-ITS-Enable-virtual-ITS-driver.patch with
   patch xen-arm-ITS-Export-ITS-info-to-Virtual-ITS.patch.
 - Dropped patch xen-arm-ITS-Add-32-bit-access-to-GICR_TYPER.patch.
   This is only minor change. Hence merged with
   xen-arm-ITS-Add-GICR-register-emulation.patch.
 - Dropped patch xen-arm-ITS-Introduce-helper-to-get-number-of-event-.patch
 - Dropped gic_lpi_supported helper function.
 - Changed LPI property table usage and handling.
 - Added support to pass nr_lpis from bootargs.
 - Added support to enable/disable its support from bootargs.
 - Fixed issues around freeing of its_device on error.
 - Introduced vits.h file
 - Dropped xen-dt-Handle-correctly-node-with-interrupt-map-in-d.patch
   from this series as it is already merged.

  Could not share code via Github. Network is very slow.
  Please, let me know if required.

Changes in v6:

 - Rebased to latest staging branch.
 - Compiled all the patches individually for both arm32 and arm64
 - Split the patch "xen/arm: ITS: Allocate irq descriptors for LPIs" into two.
   One for allocating LPI irq_desc and other patch for allocating pending_irq desc
   for LPIs
 - Following new patches are introduced
     1) xen/arm: Rename NR_IRQs and vgic_num_irqs helper function
     2) xen/arm: ITS: Introduce msi_desc for LPIs
     3) xen/arm: Move vgic locking inside get_irq_priority callback
     4) xen/arm: ITS: Store LPIs allocated and IRQ ID bits per domain
     5) xen/arm: ITS: Introduce helper to get number of event IDs
     6) xen/arm: ITS: Add virtual ITS availability check helper
     7) xen/arm: ITS: Add 32-bit access to GICR_TYPER)
     8) xen/arm: ITS: Allocate pending_lpi descriptors for LPIs

 - Based on below patch set
     http://lists.xen.org/archives/html/xen-devel/2015-08/msg00168.html

 Some Major TODOs:
   1) Avoid making vits_process_cmd() static in later point of time
   2) How to handle LPI that does not have LPI config table entry.
   3) Enable/disable ITS to Dom0

Changes in v5:
  - Added following new patches
      0001-xen-arm-Return-success-if-dt-node-does-not-have-irq-.patch
      0004-xen-arm-Set-nr_cpu_ids-to-available-number-of-cpus.patch
      0009-xen-arm-ITS-Export-ITS-info-to-Virtual-ITS.patch
      0013-xen-arm-ITS-Implement-gic_is_lpi-helper-function.patch
  - Split patch #12 into two patches #14 & #16
      0014-xen-arm-ITS-Allocate-irq-descriptors-for-LPIs.patch
      0016-xen-arm-ITS-Route-LPIs.patch
  - Introduce new API to route LPI (route_lpi_to_guest() )
  - Moved patch #8 in v4 as patch #19
  - irq_descritors for LPIs are allocated dynamically
  - Removed RB-tree for managing vitual its devices. Will be
    introduced when pci-passthrough is implemented
  - its_add_device() api now takes nr_ites and DT its node as parameters
  - some function are kept as non-static when introduced in a patch for
    compilation purpose and eventually made static when used.
  - Tested compilation for arm32

Changes in v4:
  - Patch for rate limiting of error message is removed.
  - Patch #4 and #5 in v3 is merged
  - Merged #13 and #16 as one patch
  - hw_irq_controller is implemented for LPIs
  - GITS and GICR emulation for LPIs in separate patches
  - Removed build functions for ITS command in physical ITS driver
  - Added new patch to add and assign devices from platform file
  - Enable compilation of vits and pits driver in separate patch
  - Replace msi-parent property in all pci dt nodes to single
    ITS node generated by Xen for Dom0

Vijaya Kumar K (28):
  xen/arm: Add bitmap_find_next_zero_area helper function
  xen: Add log2 functionality
  xen/arm: Set nr_cpu_ids to available number of cpus
  xen/arm: Rename NR_IRQs and vgic_num_irqs helper function
  xen/arm: ITS: Port ITS driver to Xen
  xen/arm: ITS: Add helper functions to manage its_devices
  xen/arm: ITS: Introduce msi_desc for LPIs
  xen/arm: ITS: Add APIs to add and assign device
  xen/arm: ITS: Introduce gic_is_lpi helper function
  xen/arm: ITS: Implement hw_irq_controller for LPIs
  xen/arm: ITS: Enable compilation of physical ITS driver
  xen/arm: ITS: Plumbing hw_irq_controller for LPIs
  xen/arm: Move vgic rank locking inside get_irq_priority
  xen/arm: ITS: Initialize physical ITS and export lpi support
  xen/arm: ITS: Add virtual ITS driver
  xen/arm: ITS: Add virtual ITS commands support
  xen/arm: ITS: Add GITS registers emulation
  xen/arm: ITS: Export ITS info to Virtual ITS
  xen/arm: ITS: Store LPIs allocated per domain
  xen/arm: ITS: Add virtual ITS availability check helper
  xen/arm: ITS: Add GICR register emulation
  xen/arm: ITS: Allocate irq descriptors for LPIs
  xen/arm: ITS: Allocate pending_lpi descriptors for LPIs
  xen/arm: ITS: Route LPIs
  xen/arm: ITS: Add domain specific ITS initialization
  xen/arm: ITS: Map ITS translation space
  xen/arm: ITS: Generate ITS node for Dom0
  xen/arm: ITS: Add pci devices in ThunderX

 xen/arch/arm/Makefile             |    2 +
 xen/arch/arm/domain_build.c       |   14 +
 xen/arch/arm/gic-hip04.c          |   17 +-
 xen/arch/arm/gic-v2.c             |   17 +-
 xen/arch/arm/gic-v3-its.c         | 1652 +++++++++++++++++++++++++++++++++++++
 xen/arch/arm/gic-v3.c             |  127 ++-
 xen/arch/arm/gic.c                |   66 +-
 xen/arch/arm/irq.c                |  183 +++-
 xen/arch/arm/platforms/Makefile   |    1 +
 xen/arch/arm/platforms/thunderx.c |  200 +++++
 xen/arch/arm/setup.c              |    2 +
 xen/arch/arm/vgic-v2.c            |    6 +-
 xen/arch/arm/vgic-v3-its.c        |  951 +++++++++++++++++++++
 xen/arch/arm/vgic-v3.c            |  406 ++++++++-
 xen/arch/arm/vgic.c               |  146 +++-
 xen/common/bitmap.c               |   39 +
 xen/include/asm-arm/domain.h      |   10 +
 xen/include/asm-arm/gic-its.h     |  313 +++++++
 xen/include/asm-arm/gic.h         |   21 +-
 xen/include/asm-arm/gic_v3_defs.h |   51 +-
 xen/include/asm-arm/irq.h         |   24 +-
 xen/include/asm-arm/vgic.h        |   14 +-
 xen/include/asm-arm/vits.h        |  100 +++
 xen/include/xen/bitmap.h          |   16 +
 xen/include/xen/lib.h             |    2 +
 xen/include/xen/log2.h            |  167 ++++
 26 files changed, 4464 insertions(+), 83 deletions(-)
 create mode 100644 xen/arch/arm/gic-v3-its.c
 create mode 100644 xen/arch/arm/platforms/thunderx.c
 create mode 100644 xen/arch/arm/vgic-v3-its.c
 create mode 100644 xen/include/asm-arm/gic-its.h
 create mode 100644 xen/include/asm-arm/vits.h
 create mode 100644 xen/include/xen/log2.h

-- 
1.7.9.5