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[Qemu-devel] [PATCH v2 00/38] Delay destruction of memory regions to ins
From: |
Paolo Bonzini |
Subject: |
[Qemu-devel] [PATCH v2 00/38] Delay destruction of memory regions to instance_finalize |
Date: |
Tue, 3 Sep 2013 14:32:51 +0200 |
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.
Though overlooked, this is important even now: QEMU's little secret is
that devices already do access memory out of the iothread mutex (with
address_space_map/unmap and AIO), and this can be MMIO memory too
through a bounce buffer. This series prepares things so that, once
we'll put the memory_region_ref/unref infrastructure to complete use,
things will just work.
Of course this split will be particularly important for devices that
will be able to do unlocked MMIO.
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. As it is mostly
a PCI patch, it should go through mst's tree.
Paolo
Paolo Bonzini (38):
qdev: document assumption that unrealize is followed by finalize
pci: split exit and finalize
ac97: use instance_finalize instead of exit
es1370: use instance_finalize instead of exit
hda: reclaim memory in instance_finalize instead of exit
serial: reclaim memory in instance_finalize instead of exit
tpci200: use instance_finalize instead of exit
pci-assign: reclaim memory in instance_finalize instead of exit
ahci: reclaim memory in 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: reclaim memory in instance_finalize instead of exit
pci-testdev: use instance_finalize instead of exit
vfio: reclaim memory in 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: reclaim memory in instance_finalize instead of exit
shpc: split shpc_free from shpc_cleanup
pci_bridge: split pci_bridge_free from pci_bridge_exitfn
pcie_aer: pcie_aer_exit really frees stuff
pci_bridge: reclaim memory in instance_finalize instead of exit
ioh4320: reclaim memory in instance_finalize instead of exit
xio3130-downstream: reclaim memory in instance_finalize instead of
exit
xio3130-upstream: reclaim memory in 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: reclaim memory in instance_finalize instead of exit
usb-uhci: use instance_finalize instead of exit
virtio-pci: reclaim memory in instance_finalize instead of exit
wdt_i6300esb: use instance_finalize instead of exit
xen_pt: reclaim memory in instance_finalize instead of exit
tpm: move add/del_subregion to realize/unrealize
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 | 2 +-
hw/ide/ahci.h | 2 +-
hw/ide/cmd646.c | 6 ++---
hw/ide/ich.c | 12 ++++++---
hw/ide/piix.c | 9 ++++---
hw/ide/via.c | 6 ++---
hw/misc/ivshmem.c | 13 +++++++---
hw/misc/pci-testdev.c | 6 ++---
hw/misc/vfio.c | 52 +++++++++++++++++++++++++++++++++++---
hw/net/e1000.c | 6 ++---
hw/net/eepro100.c | 5 ++--
hw/net/ne2000.c | 5 ++--
hw/net/pcnet-pci.c | 6 ++---
hw/net/rtl8139.c | 6 ++---
hw/net/vmxnet3.c | 14 ++++++++--
hw/pci-bridge/i82801b11.c | 1 +
hw/pci-bridge/ioh3420.c | 11 +++++++-
hw/pci-bridge/pci_bridge_dev.c | 13 +++++++++-
hw/pci-bridge/xio3130_downstream.c | 11 +++++++-
hw/pci-bridge/xio3130_upstream.c | 11 +++++++-
hw/pci/msix.c | 22 +++++++++++-----
hw/pci/pci.c | 15 ++++++++---
hw/pci/pci_bridge.c | 5 ++++
hw/pci/pcie_aer.c | 3 ++-
hw/pci/pcie_host.c | 23 ++++++++++++-----
hw/pci/shpc.c | 8 +++++-
hw/scsi/esp-pci.c | 6 ++---
hw/scsi/lsi53c895a.c | 6 ++---
hw/scsi/vmw_pvscsi.c | 12 ++++++++-
hw/tpm/tpm_tis.c | 17 +++++++++----
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_bridge.h | 1 +
include/hw/pci/pcie_aer.h | 2 +-
include/hw/pci/pcie_host.h | 1 +
include/hw/pci/shpc.h | 1 +
include/hw/qdev-core.h | 4 +++
48 files changed, 329 insertions(+), 91 deletions(-)
--
1.8.3.1