Re: [Qemu-devel] [PATCH RFC 00/10] pci: Partial conversion to realize

[Michael S. Tsirkin]

On Tue, Oct 28, 2014 at 08:35:29AM +0100, Markus Armbruster wrote:
> While discussing Gonglei's "[PATCH v2 00/19] usb: convert device init
> to realize", Paolo called the PCI conversion job "Gargantuan".  This
> series attempts to crack it into manageable jobs.
> 
> The basic idea comes from qdev core: have the core deal with just
> realize, but default the device models' realize() method to one that
> calls the old init() method.  Unconverted device models don't set
> their realize(), thus get one that calls their init().  We can then
> convert device by device instead of having to convert of all of PCI in
> one Gargantuan go.
> 
> Since PCI's exit() cannot fail, I chose not to add an unrealize().
> Precedence: USBDeviceClass method handle_destroy(), called on USB
> unrealize.
> 
> Aside: USBDeviceClass also has an unrealize() method, but it's never
> set and never called.
> 
> PATCH 01 converts the interface between PCI core and qdev to realize.
> 
> PATCH 02 adds realize to the interface between PCI core and PCI device
> models.  Once all device models are converted to realize, the old init
> interface can be dropped, completing the Gargantuan job.
> 
> PATCH 03-04 convert device models that cannot fail initialization.
> 
> PATCH 05-10 convert a few that can fail, but are really easy to
> convert.
> 
> This series is RFC because it's based on Marcel's "[PATCH v2] hw/pci:
> fixed crash when using rombar=0 with romfile=path for hotplugged
> devices", which is still undergoing review.

I've applied that one, and your patchset looks good to me,
But of course we can't apply new refactorings right now after soft
freeze.  Unless this fixes some bug?

> Markus Armbruster (10):
>   pci: Convert core to realize
>   pci: Permit incremental conversion of device models to realize
>   pci: Trivial device model conversions to realize
>   pcnet: pcnet_common_init() always returns 0, change to void
>   pcnet: Convert to realize
>   serial-pci: Convert to realize
>   ide/ich: Convert to realize
>   cirrus-vga: Convert to realize
>   qxl: Convert to realize
>   pci-assign: Convert to realize
> 
>  hw/acpi/piix4.c            |   5 +-
>  hw/audio/ac97.c            |   5 +-
>  hw/audio/es1370.c          |   5 +-
>  hw/audio/intel-hda.c       |   6 +--
>  hw/char/serial-pci.c       |  22 ++++-----
>  hw/display/cirrus_vga.c    |  11 ++---
>  hw/display/qxl.c           |  36 +++++++--------
>  hw/display/vga-pci.c       |  11 ++---
>  hw/display/vmware_vga.c    |   6 +--
>  hw/i2c/smbus_ich9.c        |   5 +-
>  hw/i386/kvm/pci-assign.c   |  10 ++--
>  hw/ide/cmd646.c            |   5 +-
>  hw/ide/ich.c               |  13 +++---
>  hw/ide/piix.c              |  10 ++--
>  hw/ide/via.c               |   6 +--
>  hw/ipack/tpci200.c         |   6 +--
>  hw/isa/i82378.c            |   6 +--
>  hw/isa/piix4.c             |   5 +-
>  hw/isa/vt82c686.c          |  24 ++++------
>  hw/misc/pci-testdev.c      |   6 +--
>  hw/net/e1000.c             |   6 +--
>  hw/net/eepro100.c          |   6 +--
>  hw/net/lance.c             |   3 +-
>  hw/net/ne2000.c            |   6 +--
>  hw/net/pcnet-pci.c         |   6 +--
>  hw/net/pcnet.c             |   4 +-
>  hw/net/pcnet.h             |   2 +-
>  hw/net/rtl8139.c           |   6 +--
>  hw/net/vmxnet3.c           |   6 +--
>  hw/pci-bridge/dec.c        |   5 +-
>  hw/pci-host/apb.c          |   5 +-
>  hw/pci-host/bonito.c       |   6 +--
>  hw/pci-host/grackle.c      |   5 +-
>  hw/pci-host/piix.c         |  12 ++---
>  hw/pci-host/ppce500.c      |   6 +--
>  hw/pci-host/prep.c         |   6 +--
>  hw/pci-host/q35.c          |   5 +-
>  hw/pci-host/uninorth.c     |  20 ++++----
>  hw/pci-host/versatile.c    |   5 +-
>  hw/pci/pci.c               | 111 
> ++++++++++++++++++++++++++-------------------
>  hw/usb/hcd-ehci-pci.c      |   6 +--
>  hw/usb/hcd-xhci.c          |   6 +--
>  hw/watchdog/wdt_i6300esb.c |   6 +--
>  include/hw/pci/pci.h       |   3 +-
>  44 files changed, 199 insertions(+), 256 deletions(-)
> 
> -- 
> 1.9.3