[Xen-devel] [PATCH RFC V2 0/6] Xen: introduce Xen PV target

[Wei Liu <wei.liu2@xxxxxxxxxx>]

This is a prototype based on QEMU's master branch. In fact it's more or
less the same as the last version.

The first 3 patches refactor some code to disentangle Xen PV and HVM
guest in QEMU. They are quite safe to go in.

The 4th patch has the real meat. It introduces Xen PV target,
which contains basically a dummy CPU, then hooks up this Xen PV CPU to
QEMU internal structures.

The last patch introduces xenpv-softmmu, which contains *no* emulation
code. I know that in previous discussion people said that every device
emulation should be included if the target architecture is called null.
But since this target CPU is now called xenpv I don't feel obliged to
include any device emulation in this prototype anymore. :-)

Please note that the existing Xen QEMU build is not affected at all. You
can still use "--enable-xen --target-list=i386-softmmu" (or
x86_64-softmmu") to build qemu-system-{i386,x86_64} and use it for both
HVM and PV guest. This series adds another option to build QEMU with
"--enable-xen --target-list=xenpv-softmmu" and get a QEMU binary
tailored for Xen PV guest.  The effect is that we reduce the binary size
from 14MB to 7.3MB.

Wei.

Changes in RFC V2:
* more refactoring
* include Paolo's patch to factor out list of Xen / KVM targets

Paolo Bonzini (1):
  configure: factor out list of supported Xen/KVM targets

Wei Liu (5):
  xen: move Xen PV machine files to hw/xenpv
  xen: move Xen HVM files under hw/i386/xen
  xen: factor out common functions
  xen: implement Xen PV target
  xen: introduce xenpv-softmmu.mak

 Makefile.target                      |    6 +-
 arch_init.c                          |    2 +
 configure                            |   61 ++++++++++-------
 cpu-exec.c                           |    2 +
 default-configs/xenpv-softmmu.mak    |    2 +
 hw/i386/Makefile.objs                |    2 +-
 hw/i386/xen/Makefile.objs            |    1 +
 hw/{ => i386}/xen/xen_apic.c         |    0
 hw/{ => i386}/xen/xen_platform.c     |    0
 hw/{ => i386}/xen/xen_pvdevice.c     |    0
 hw/xen/Makefile.objs                 |    1 -
 hw/xenpv/Makefile.objs               |    2 +
 hw/{i386 => xenpv}/xen_domainbuild.c |    0
 hw/{i386 => xenpv}/xen_domainbuild.h |    0
 hw/{i386 => xenpv}/xen_machine_pv.c  |    0
 include/sysemu/arch_init.h           |    1 +
 target-xenpv/Makefile.objs           |    1 +
 target-xenpv/cpu-qom.h               |   64 ++++++++++++++++++
 target-xenpv/cpu.h                   |   66 ++++++++++++++++++
 target-xenpv/helper.c                |   32 +++++++++
 target-xenpv/translate.c             |   27 ++++++++
 xen-common-stub.c                    |   19 ++++++
 xen-common.c                         |  123 ++++++++++++++++++++++++++++++++++
 xen-stub.c => xen-hvm-stub.c         |   18 ++---
 xen-all.c => xen-hvm.c               |  121 +++------------------------------
 xen-mapcache-stub.c                  |   39 +++++++++++
 26 files changed, 442 insertions(+), 148 deletions(-)
 create mode 100644 default-configs/xenpv-softmmu.mak
 create mode 100644 hw/i386/xen/Makefile.objs
 rename hw/{ => i386}/xen/xen_apic.c (100%)
 rename hw/{ => i386}/xen/xen_platform.c (100%)
 rename hw/{ => i386}/xen/xen_pvdevice.c (100%)
 create mode 100644 hw/xenpv/Makefile.objs
 rename hw/{i386 => xenpv}/xen_domainbuild.c (100%)
 rename hw/{i386 => xenpv}/xen_domainbuild.h (100%)
 rename hw/{i386 => xenpv}/xen_machine_pv.c (100%)
 create mode 100644 target-xenpv/Makefile.objs
 create mode 100644 target-xenpv/cpu-qom.h
 create mode 100644 target-xenpv/cpu.h
 create mode 100644 target-xenpv/helper.c
 create mode 100644 target-xenpv/helper.h
 create mode 100644 target-xenpv/translate.c
 create mode 100644 xen-common-stub.c
 create mode 100644 xen-common.c
 rename xen-stub.c => xen-hvm-stub.c (91%)
 rename xen-all.c => xen-hvm.c (93%)
 create mode 100644 xen-mapcache-stub.c

-- 
1.7.10.4


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