[PATCH 00/22] i8259: improve qdev PIC modelling (and misc fixes)

[Mark Cave-Ayland <mark.caveayland@xxxxxxxxxxx>]

This series attempts to improve the modelling of legacy x86 PICs within
QEMU. The initial aim was to have a qdev device with one output gpio, and
16 input gpios representing the legacy IRQ lines, however as I went about
trying to model this, I found a number of other inconsistencies/bugs: in
particular there seemed to be some fuzziness around the functionality that
belongs to an individual i8259 chip, and a cascaded i8259 configuration.

For the purposes of this patch an i8259 device is considered to be a single
i8259 chip whilst a PIC device is considered to be either a cascaded i8259
configuration (emulated/KVM) or standalone device (Xen) representing the set
of 16 legacy IRQs and a single output IRQ.

Due to the updated device names, there is currently one visible change in
the HMP monitor output for "info irq" where the isa-i8259 device now appears
as isa-i8259-pic and the kvm-i8259 device appears as kvm-i8259-pic (see
patch 19).

Signed-off-by: Mark Cave-Ayland <mark.caveayland@xxxxxxxxxxx>


Mark Cave-Ayland (22):
  i8259_internal.h: rename PIC_COMMON to I8259_COMMON
  i8259_internal.h: rename TYPE_I8259_COMMON to i8259-common
  i8259_internal.h: rename PICCommonState to I8259CommonState
  i8259_internal.h: rename PICCommonClass to I8259CommonClass
  i8259.c: move parent_realize from PICClass to I8259CommonClass
  kvm/i8259.c: move parent_realize from KVMPICClass to I8259CommonClass
  i8259_common.c: use i8259/i8259_common prefix for functions
  i8259.c: use i8259 prefix for functions
  kvm/i8259.c: use kvm_i8259 prefix for functions
  i8259_common.c: convert to use DEFINE_TYPES() macro
  i8259.c: convert to use DEFINE_TYPES() macro
  kvm/i8259.c: convert to use DEFINE_TYPES() macro
  i8259.c: introduce TYPE_I8259_PIC device
  i8259.c: properly cascade secondary i8259 from primary i8259
  kvm/i8259.c: introduce TYPE_KVM_I8259_PIC device
  xen-hvm.c: rename xen_interrupt_controller_init() to xen_i8259_init()
  xen/xen-hvm.c: introduce TYPE_XEN_I8259_PIC device
  i8259_common.c: remove unused i8259_init_chip() function
  i8259: move InterruptStatsProviderClass get_statistics() from i8259 to
    PIC
  i8259.c: switch isa_pic from I8259CommonState to I8259PICState
  i8259_common.c: remove static irq_count and irq_level variables
  i8259_common.c: add missing 0x prefixes to "info pic" output

 include/hw/intc/i8259.h         |  12 +-
 include/hw/isa/i8259_internal.h |  21 ++-
 include/hw/xen/xen.h            |   2 +-
 hw/i386/kvm/i8259.c             | 167 +++++++++++++----
 hw/i386/pc.c                    |   2 +-
 hw/i386/xen/xen-hvm.c           |  40 +++-
 hw/intc/i8259.c                 | 322 +++++++++++++++++++++-----------
 hw/intc/i8259_common.c          | 171 ++++++++---------
 stubs/xen-hw-stub.c             |   2 +-
 9 files changed, 477 insertions(+), 262 deletions(-)

-- 
2.43.0