linux-kernel - [PATCH 0/3] x86: paravirt related cleanup

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Date:   Thu, 10 Aug 2017 14:52:51 +0200
From:   Juergen Gross <jgross@...e.com>
To:     linux-kernel@...r.kernel.org, xen-devel@...ts.xenproject.org,
        x86@...nel.org
Cc:     hpa@...or.com, mingo@...hat.com, tglx@...utronix.de,
        boris.ostrovsky@...cle.com, rusty@...tcorp.com.au,
        lguest@...ts.ozlabs.org, Juergen Gross <jgross@...e.com>
Subject: [PATCH 0/3] 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].

- Remove vsmp paravirt support. This is more kind of a RFC. The code
  suggests paravirt support in vsmp might be optional and there is no
  documentation (at least I found none) to support its need.

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.

Juergen Gross (3):
  paravirt,xen: remove xen_patch()
  x86/lguest: remove lguest support
  x86/vsmp: remove vsmp paravirt support

 MAINTAINERS                           |   11 -
 arch/x86/Kbuild                       |    3 -
 arch/x86/Kconfig                      |    3 -
 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/kernel/vsmp_64.c             |   69 +-
 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 +-
 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 --
 45 files changed, 18 insertions(+), 10629 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 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