[Qemu-devel] [RFC PATCH v4 0/8] Support arm-gic-kvm save/restore

[Christoffer Dall <christoffer.dall@linaro.org>]

Implement support to save/restore the ARM KVM VGIC state from the
kernel.  The basic appraoch is to transfer state from the in-kernel VGIC
to the emulated arm-gic state representation and let the standard QEMU
vmstate save/restore handle saving the arm-gic state.  Restore works by
reversing the process.

The first patches adds missing features and fixes issues with the
arm-gic implementation in qemu in preparation for the actual
save/restore logic.

The patches depend on the device control patch series sent out earlier,
which can also be found here:
git://git.linaro.org/people/cdall/qemu-arm.git migration/device-ctrl-v3

The whole patch series based on top of the above can be found here:
git://git.linaro.org/people/cdall/qemu-arm.git migration/vgic-v4

Changes [v3 -> v4]:
 - Changes are described in the individual patches
 - Some re-ordering of patches: the rename of trigger to edge_trigger is
   now the first patch because it makes subsequent patches easier to
   read
 - All the changes related to handling the pending state are now
   combined in patch 3.
 - Generally tried to address review comments from v3

Changes [v2 -> v3]:
 - Changes are described in the individual patches
 - New patch that renames GIC_..._TRIGGER to GIC_..._EDGE_TRIGGER
 - New patch to keep track of software writing to SPENDR and CPENDR
   registers.
 - New patch that fixes not clearing the pending state for an asserted
   level-triggered interrupt on ACK
 - Separate patch for the GICC_APRn state

Changes [v1 -> v2]:
 - Changes are described in the individual patches
 - VMState additions has been split into a separate patch

Christoffer Dall (8):
  arm_gic: Rename GIC_X_TRIGGER to GIC_X_EDGE_TRIGGER
  hw: arm_gic: Introduce gic_set_priority function
  arm_gic: Fix GIC pending behavior
  hw: arm_gic: Keep track of SGI sources
  arm_gic: Support setting/getting binary point reg
  vmstate: Add uint32 2D-array support
  arm_gic: Add GICC_APRn state to the GICState
  hw: arm_gic_kvm: Add KVM VGIC save/restore logic

 hw/intc/arm_gic.c                | 186 +++++++++++++----
 hw/intc/arm_gic_common.c         |  17 +-
 hw/intc/arm_gic_kvm.c            | 424 ++++++++++++++++++++++++++++++++++++++-
 hw/intc/gic_internal.h           |  10 +-
 include/hw/intc/arm_gic_common.h |  29 ++-
 include/migration/vmstate.h      |   6 +
 6 files changed, 617 insertions(+), 55 deletions(-)

-- 
1.8.5