[Qemu-devel] [PATCH v2 0/5] backdoor: lightweight guest-to-QEMU backdoor channel

[Lluís Vilanova]

Provides the ability for the guest to communicate with user-provided code inside
QEMU itself, using a lightweight mechanism.

See first commit for a full description.

Signed-off-by: Lluís Vilanova <address@hidden>
---

Changes in v2:

* Rebase on 1c8a881daaca6fe0646a425b0970fb3ad25f6732 from master.
* Multiple documentation fixes and clarifications.
* Fixed a couple of bugs when freeing memory.
* Actually call 'backdoor_fini' in user mode when exiting.
* Try to auto-detect the backdoor device in the example guest library when
  running a full-system linux.
* Rewrite code to read and write into the control channel in softmmu mode,
  making it much clearer and leaving endianness handling up to the user-provided
  backdoor callbacks.


Lluís Vilanova (5):
      backdoor: Add documentation
      backdoor: Add build infrastructure
      backdoor: [*-user] Add QEMU-side proxy to "libbackdoor.a"
      backdoor: [softmmu] Add QEMU-side proxy to "libbackdoor.a"
      backdoor: Add guest-side library


 Makefile                       |    4 +
 Makefile.objs                  |   21 ++++
 Makefile.target                |    4 +
 backdoor/guest/Makefile        |   18 ++++
 backdoor/guest/common.c        |  205 ++++++++++++++++++++++++++++++++++++++++
 backdoor/guest/qemu-backdoor.h |   59 ++++++++++++
 backdoor/qemu/qemu-backdoor.h  |   31 ++++++
 backdoor/qemu/softmmu.c        |  186 ++++++++++++++++++++++++++++++++++++
 backdoor/qemu/user.c           |  202 +++++++++++++++++++++++++++++++++++++++
 backdoor/qemu/user.h           |   30 ++++++
 bsd-user/main.c                |   26 +++++
 bsd-user/mmap.c                |    7 +
 bsd-user/syscall.c             |   13 +++
 configure                      |   35 +++++++
 darwin-user/main.c             |   26 +++++
 darwin-user/mmap.c             |    7 +
 docs/backdoor.txt              |  167 +++++++++++++++++++++++++++++++++
 hw/pci.h                       |    1 
 linux-user/main.c              |   32 ++++++
 linux-user/mmap.c              |    7 +
 linux-user/syscall.c           |   10 ++
 21 files changed, 1089 insertions(+), 2 deletions(-)
 create mode 100644 backdoor/guest/Makefile
 create mode 100644 backdoor/guest/common.c
 create mode 100644 backdoor/guest/qemu-backdoor.h
 create mode 100644 backdoor/qemu/qemu-backdoor.h
 create mode 100644 backdoor/qemu/softmmu.c
 create mode 100644 backdoor/qemu/user.c
 create mode 100644 backdoor/qemu/user.h
 create mode 100644 docs/backdoor.txt