[Qemu-devel] [PATCH 00/39] Delay destruction of memory regions to instance_finalize

[Paolo Bonzini <pbonzini@redhat.com>]

QOM splits the destruction of a device in two phases:

- unrealize, also known as "exit" from qdev times, should isolate
  the device from the guest.  After unrealize returns, the guest
  should not be able to issue new requests.

- instance_finalize will reclaim the memory.  This is only called
  after all requests terminate and drop the references on the
  device.

This is important even now, but overlooked.  It will become much
more important for devices that will be able to access memory
out of the big QEMU lock.

This series changes all PCI devices (the sole to support hotplug
_and_ use MemoryRegions) to do memory_region_del_subregion at
unrealize time, and memory_region_destroy at instance_finalize
time.

This is mostly a PCI patch, and independent from the others,
so I believe it should go through mst's tree.

Paolo


Paolo Bonzini (39):
  scsi: keep device alive while it has requests
  dma: keep a device alive while it has SGLists
  pci: split exit and finalize
  ac97: use instance_finalize instead of exit
  es1370: use instance_finalize instead of exit
  hda: use instance_finalize instead of exit
  serial: use instance_finalize instead of exit
  tpci200: use instance_finalize instead of exit
  pci-assign: use instance_finalize instead of exit
  ahci: use instance_finalize instead of exit
  msix: split msix_free from msix_uninit
  cmd646: use instance_finalize instead of exit
  ide/piix: use instance_finalize instead of exit
  ide/via: use instance_finalize instead of exit
  ivshmem: use instance_finalize instead of exit
  pci-testdev: use instance_finalize instead of exit
  vfio: use instance_finalize instead of exit
  e1000: use instance_finalize instead of exit
  eepro100: use instance_finalize instead of exit
  ne2000: use instance_finalize instead of exit
  pcnet: use instance_finalize instead of exit
  rtl8139: use instance_finalize instead of exit
  vmxnet3: use instance_finalize instead of exit
  shpc: use instance_finalize instead of exit
  pci_bridge: split pci_bridge_exitfn from pci_bridge_free
  pcie_aer: pcie_aer_exit really frees stuff
  pci_bridge: use instance_finalize instead of exit
  ioh4320: use instance_finalize instead of exit
  xio3130-downstream: use instance_finalize instead of exit
  xio3130-upstream: use instance_finalize instead of exit
  pcie: do not recreate mmcfg I/O region, use an alias instead
  esp: use instance_finalize instead of exit
  lsi: use instance_finalize instead of exit
  pvscsi: use instance_finalize instead of exit
  usb-uhci: use instance_finalize instead of exit
  virtio-pci: use instance_finalize instead of exit
  wdt_i6300esb: use instance_finalize instead of exit
  xen_pt: use instance_finalize instead of exit
  tpm: move add/del_subregion to realize/unrealize

 dma-helpers.c                      |  6 ++++-
 hw/audio/ac97.c                    |  5 ++--
 hw/audio/es1370.c                  |  5 ++--
 hw/audio/intel-hda.c               |  8 ++++++
 hw/char/serial-pci.c               | 24 ++++++++++++++++++
 hw/char/tpci200.c                  |  5 ++--
 hw/i386/kvm/pci-assign.c           |  8 ++++++
 hw/ide/ahci.c                      |  5 ++--
 hw/ide/ahci.h                      |  2 +-
 hw/ide/cmd646.c                    |  5 ++--
 hw/ide/ich.c                       | 13 +++++++---
 hw/ide/macio.c                     |  4 +--
 hw/ide/piix.c                      |  8 +++---
 hw/ide/via.c                       |  5 ++--
 hw/misc/ivshmem.c                  | 10 +++++++-
 hw/misc/pci-testdev.c              |  5 ++--
 hw/misc/vfio.c                     | 52 +++++++++++++++++++++++++++++++++++---
 hw/net/e1000.c                     |  5 ++--
 hw/net/eepro100.c                  |  5 ++--
 hw/net/ne2000.c                    |  5 ++--
 hw/net/pcnet-pci.c                 |  5 ++--
 hw/net/rtl8139.c                   |  5 ++--
 hw/net/vmxnet3.c                   | 14 ++++++++--
 hw/pci-bridge/i82801b11.c          |  1 +
 hw/pci-bridge/ioh3420.c            | 11 +++++++-
 hw/pci-bridge/pci_bridge_dev.c     | 14 +++++++++-
 hw/pci-bridge/xio3130_downstream.c | 11 +++++++-
 hw/pci-bridge/xio3130_upstream.c   | 11 +++++++-
 hw/pci/msix.c                      | 26 ++++++++++++++-----
 hw/pci/pci.c                       | 15 ++++++++---
 hw/pci/pci_bridge.c                |  5 ++++
 hw/pci/pcie_aer.c                  |  3 ++-
 hw/pci/pcie_host.c                 | 22 ++++++++++++----
 hw/pci/shpc.c                      |  8 +++++-
 hw/scsi/esp-pci.c                  |  5 ++--
 hw/scsi/lsi53c895a.c               |  5 ++--
 hw/scsi/megasas.c                  |  4 +--
 hw/scsi/scsi-bus.c                 |  4 +++
 hw/scsi/virtio-scsi.c              | 10 +++++---
 hw/scsi/vmw_pvscsi.c               | 12 ++++++++-
 hw/tpm/tpm_tis.c                   | 14 +++++++---
 hw/usb/hcd-ehci.c                  |  4 +--
 hw/usb/hcd-uhci.c                  |  5 ++--
 hw/virtio/virtio-pci.c             | 10 +++++++-
 hw/watchdog/wdt_i6300esb.c         |  5 ++--
 hw/xen/xen_pt.c                    | 10 ++++++++
 hw/xen/xen_pt_config_init.c        |  3 ---
 hw/xen/xen_pt_msi.c                |  8 +++++-
 include/hw/pci/msix.h              |  1 +
 include/hw/pci/pci.h               |  2 +-
 include/hw/pci/pci_bridge.h        |  1 +
 include/hw/pci/pcie_aer.h          |  2 +-
 include/hw/pci/pcie_host.h         |  1 +
 include/hw/pci/shpc.h              |  1 +
 include/sysemu/dma.h               |  4 ++-
 55 files changed, 355 insertions(+), 92 deletions(-)

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1.8.1.4