[CRIU] [PATCH 00/22] FPU c/r, v2

[Cyrill Gorcunov]

Hi guys,

I'm pleased to announce the v2 of FPU c/r. What have been
changed since v1

 - xsave now properly supported and we can c/r up to ymm
   registers now

 - all series get reordered and simplified

Here is overall design is pretty simple:

 - The FPU is damped via parasite by fxsave or xsave
   instruction which fills memory slab with complete
   FPU state

 - Then we restore the FPU state by providing its state
   inside sigreturn frame and the kernel initialize it
   for us

Note, at moment we don't do additional analisys and simply
dump complete FPU state. Since on all machines I've been
testing this functioanlity the libc did use FPU we always
have FPU in "touched" state and we have to checkpoint it.

In future we could add some command line option flag which
would allow the user to decide if FPU is to be saved or
not.

Cyrill Gorcunov (22):
  make: Add utilities.mak
  make: Add test that "fxsaveq" instruction is supported
  Include fpu.h
  protobuf: Add cpu.proto
  protobuf: Update core.proto for new features
  cpu: Prepare scaffold for obtaining cpu features
  dump,restore: Initialize cpu run-time features
  parasite: Add ability to dump FPU state
  dump: Allocate enough space for FPU dumping in PB objects
  dump: Fill cpu features on checkpoint
  dump: Checkpoint the FPU state
  dump: Drop padding from FPU state
  restorer: Extend thread_restore_args to keep xsave structure
  restorer: Make rt_sigcontext::fpstate being void
  restore: Add test that registers are present in image
  restore: Add test for xsave data present in image
  restore: Add ability to restore FPU data
  zdtm: Don't wait too long for restore
  zdtm: Add cpuid.h
  zdtm: Enable fpu00 test-case
  zdtm: Add fpu01 test
  zdtm: Enable fpu01 test

 Makefile                       |    4 +
 Makefile.inc                   |    4 +
 config/feature-tests.mak       |    7 +
 config/utilities.mak           |  188 ++++++++++++++++++
 cpu.c                          |  144 ++++++++++++++
 cr-dump.c                      |  110 ++++++++---
 cr-restore.c                   |  126 ++++++++++++
 include/cpu.h                  |  412 ++++++++++++++++++++++++++++++++++++++++
 include/fpu.h                  |  165 ++++++++++++++++
 include/parasite-syscall.h     |    3 +
 include/parasite.h             |    7 +
 include/proc_parse.h           |    2 +
 include/restorer.h             |   10 +-
 parasite-syscall.c             |   19 ++
 parasite.c                     |   24 +++
 proc_parse.c                   |   28 +++
 protobuf/Makefile              |    1 +
 protobuf/core.proto            |   15 ++
 protobuf/cpu.proto             |   13 ++
 restorer.c                     |    8 +
 test/zdtm.sh                   |    4 +-
 test/zdtm/lib/cpuid.h          |   39 ++++
 test/zdtm/live/static/Makefile |    1 +
 test/zdtm/live/static/fpu01.c  |  105 ++++++++++
 24 files changed, 1407 insertions(+), 32 deletions(-)
 create mode 100644 config/feature-tests.mak
 create mode 100644 config/utilities.mak
 create mode 100644 cpu.c
 create mode 100644 include/cpu.h
 create mode 100644 include/fpu.h
 create mode 100644 protobuf/cpu.proto
 create mode 100644 test/zdtm/lib/cpuid.h
 create mode 100644 test/zdtm/live/static/fpu01.c

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1.7.7.6