[Qemu-devel] [RFC v5 0/7] vITS support

[Eric Auger]

This series introduces support for in-kernel GICv3 ITS emulation.
It is based on a kernel API which is not yet released.

Tested on Cavium ThunderX with virtio-net-pci and vhost-net with both dt
and ACPI guests

Host Kernel dependencies:
- [PATCH v10 00/17] KVM: arm64: GICv3 ITS emulation
  http://www.spinics.net/lists/kvm/msg135687.html
- [RFC v9 0/6] KVM: arm/arm64: gsi routing support
  http://www.spinics.net/lists/kvm/msg136083.html

Guest Kernel dependencies for resp. ACPI ITS and PCIe support:
- [PATCH V7 0/8] Introduce ACPI world to ITS,
  https://lkml.org/lkml/2016/6/20/321
- Support for ARM64 ACPI based PCI host controller,
  https://lwn.net/Articles/690995/

Host kernel series can be found at:
https://github.com/eauger/linux/tree/v4.7-its-emul-v10-gsi-routing-v9

This QEMU series can be found at:

v5: https://github.com/eauger/qemu/tree/v2.6.0-vITS-v5

Previous versions are available at:
v4: https://github.com/eauger/qemu/tree/v2.6.0-vITS-v4
v3: https://lists.gnu.org/archive/html/qemu-devel/2015-11/msg05197.html

History:
v4 => v5:
- fix compilation issue with arm-softmmu target
- rebase on target-arm: Fix unreachable code in gicv3_class_name()
- add ACPI support
- kernel ITS init sequence is not yet similar to GICv2/V3 ones. This will
  be addressed in a subsequent respin.

v3 => v4:
- Took into account Peter's comments (at the exception of sub-class
  operation changes)
- rebase on Andre's kernel ITS emulation series v8
- rework KVM init sequence and KVM device creation/settings overall.
  I do not use kvm_arm_register_device due to the way the kernel
  API is devises (see discussion on the kernel ML)
- change the computation of the GITS_TRANSLATER base address
- fix compilation issues
- new "arget-arm: move gicv3_class_name from machine to kvm_arm.h"

v2 => v3:
- Really added unmigratable flag, was overlooked in v2
- Fixed checkpatch issue with initializing static variable to zero

        /bin/bash: indent : commande introuvabledded registers and reset method
- Added unmigratable flag
- Rebased on top of current master, use kvm_arch_fixup_msi_route() now

Pavel Fedin (5):
  hw/intc: Implement ITS base class
  kernel: Add vGICv3 ITS definitions
  kvm_arm: Pass requester ID to MSI routing functions
  kvm_arm: Implement support for ITS emulation by KVM
  arm/virt: Add ITS to the virt board

Eric Auger (2):
  target-arm: move gicv3_class_name from machine to kvm_arm.h
  hw/arm/virt-acpi-build: Add ITS description in ACPI MADT table

Pavel Fedin (5):
  hw/intc/arm_gicv3_its: Implement ITS base class
  linux-headers: update to 4.7-rc6 + ITS emulation and GSI routing
  target-arm/kvm: Pass requester ID to MSI routing functions
  hw/intc/arm_gicv3_its: Implement support for in-kernel ITS emulation
  arm/virt: Add ITS to the virt board

 hw/arm/virt-acpi-build.c                           |   7 +
 hw/arm/virt.c                                      |  47 ++++++-
 hw/intc/Makefile.objs                              |   2 +
 hw/intc/arm_gicv3_its_common.c                     | 155 +++++++++++++++++++++
 hw/intc/arm_gicv3_its_kvm.c                        | 145 +++++++++++++++++++
 include/hw/acpi/acpi-defs.h                        |  13 +-
 include/hw/intc/arm_gicv3_its_common.h             |  75 ++++++++++
 include/standard-headers/linux/input-event-codes.h |  31 +++++
 include/standard-headers/linux/input.h             |   1 +
 linux-headers/asm-arm64/kvm.h                      |   2 +
 linux-headers/linux/kvm.h                          |  12 +-
 target-arm/kvm.c                                   |   6 +
 target-arm/kvm_arm.h                               |  38 ++++-
 target-arm/machine.c                               |  15 --
 14 files changed, 524 insertions(+), 25 deletions(-)
 create mode 100644 hw/intc/arm_gicv3_its_common.c
 create mode 100644 hw/intc/arm_gicv3_its_kvm.c
 create mode 100644 include/hw/intc/arm_gicv3_its_common.h

-- 
2.5.5