linux-kernel - [PATCH v2 0/2] x86: paravirt related cleanup

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Date:   Wed, 16 Aug 2017 19:31:55 +0200
From:   Juergen Gross <jgross@...e.com>
To:     linux-kernel@...r.kernel.org, xen-devel@...ts.xenproject.org,
        x86@...nel.org, lguest@...ts.ozlabs.org
Cc:     boris.ostrovsky@...cle.com, hpa@...or.com, tglx@...utronix.de,
        mingo@...hat.com, rusty@...tcorp.com.au,
        Juergen Gross <jgross@...e.com>
Subject: [PATCH v2 0/2] x86: paravirt related cleanup

Cleanup special cases of paravirt patching:

- Xen doesn't need a custom patching function, it can use
  paravirt_patch_default()

- Remove lguest completely from the tree. A LKML mail asking for any
  users 3 months ago did not reveal any need for keeping lguest [1].

In case the patches make it to the tree there is quite some potential
for further simplification of paravirt stuff. Especially most of the
pv operations can be put under the CONFIG_XEN_PV umbrella.

Changes in V2:
- drop patch 3 (removal of vsmp support)
- patch 1: remove even more stuff no longer needed without xen_patch()
    (Peter Zijlstra)

[1]: https://lkml.org/lkml/2017/5/15/502

Juergen Gross (2):
  paravirt,xen: remove xen_patch()
  x86/lguest: remove lguest support

 MAINTAINERS                           |   11 -
 arch/x86/Kbuild                       |    3 -
 arch/x86/Kconfig                      |    2 -
 arch/x86/include/asm/lguest.h         |   91 -
 arch/x86/include/asm/lguest_hcall.h   |   74 -
 arch/x86/include/asm/processor.h      |    2 +-
 arch/x86/include/uapi/asm/bootparam.h |    2 +-
 arch/x86/kernel/asm-offsets_32.c      |   20 -
 arch/x86/kernel/head_32.S             |    2 -
 arch/x86/kernel/platform-quirks.c     |    1 -
 arch/x86/kvm/Kconfig                  |    1 -
 arch/x86/lguest/Kconfig               |   14 -
 arch/x86/lguest/Makefile              |    2 -
 arch/x86/lguest/boot.c                | 1558 ---------------
 arch/x86/lguest/head_32.S             |  192 --
 arch/x86/xen/enlighten_pv.c           |   59 +-
 arch/x86/xen/xen-asm.S                |   24 +-
 arch/x86/xen/xen-asm.h                |   12 -
 arch/x86/xen/xen-asm_32.S             |   27 +-
 arch/x86/xen/xen-asm_64.S             |   20 +-
 arch/x86/xen/xen-ops.h                |   15 +-
 drivers/Makefile                      |    1 -
 drivers/block/Kconfig                 |    2 +-
 drivers/char/Kconfig                  |    2 +-
 drivers/char/virtio_console.c         |    2 +-
 drivers/lguest/Kconfig                |   13 -
 drivers/lguest/Makefile               |   26 -
 drivers/lguest/README                 |   47 -
 drivers/lguest/core.c                 |  398 ----
 drivers/lguest/hypercalls.c           |  304 ---
 drivers/lguest/interrupts_and_traps.c |  706 -------
 drivers/lguest/lg.h                   |  258 ---
 drivers/lguest/lguest_user.c          |  446 -----
 drivers/lguest/page_tables.c          | 1239 ------------
 drivers/lguest/segments.c             |  228 ---
 drivers/lguest/x86/core.c             |  724 -------
 drivers/lguest/x86/switcher_32.S      |  388 ----
 drivers/net/Kconfig                   |    2 +-
 drivers/tty/hvc/Kconfig               |    2 +-
 drivers/virtio/Kconfig                |    4 +-
 include/linux/lguest.h                |   73 -
 include/linux/lguest_launcher.h       |   44 -
 include/uapi/linux/virtio_ring.h      |    4 +-
 tools/Makefile                        |   11 +-
 tools/lguest/.gitignore               |    2 -
 tools/lguest/Makefile                 |   14 -
 tools/lguest/extract                  |   58 -
 tools/lguest/lguest.c                 | 3420 ---------------------------------
 tools/lguest/lguest.txt               |  125 --
 49 files changed, 36 insertions(+), 10639 deletions(-)
 delete mode 100644 arch/x86/include/asm/lguest.h
 delete mode 100644 arch/x86/include/asm/lguest_hcall.h
 delete mode 100644 arch/x86/lguest/Kconfig
 delete mode 100644 arch/x86/lguest/Makefile
 delete mode 100644 arch/x86/lguest/boot.c
 delete mode 100644 arch/x86/lguest/head_32.S
 delete mode 100644 arch/x86/xen/xen-asm.h
 delete mode 100644 drivers/lguest/Kconfig
 delete mode 100644 drivers/lguest/Makefile
 delete mode 100644 drivers/lguest/README
 delete mode 100644 drivers/lguest/core.c
 delete mode 100644 drivers/lguest/hypercalls.c
 delete mode 100644 drivers/lguest/interrupts_and_traps.c
 delete mode 100644 drivers/lguest/lg.h
 delete mode 100644 drivers/lguest/lguest_user.c
 delete mode 100644 drivers/lguest/page_tables.c
 delete mode 100644 drivers/lguest/segments.c
 delete mode 100644 drivers/lguest/x86/core.c
 delete mode 100644 drivers/lguest/x86/switcher_32.S
 delete mode 100644 include/linux/lguest.h
 delete mode 100644 include/linux/lguest_launcher.h
 delete mode 100644 tools/lguest/.gitignore
 delete mode 100644 tools/lguest/Makefile
 delete mode 100644 tools/lguest/extract
 delete mode 100644 tools/lguest/lguest.c
 delete mode 100644 tools/lguest/lguest.txt

-- 
2.12.3