x86 FPU API

Currently all fpu accessors are wedded to task_struct.  However kvm also uses
the fpu in a different context.  Introduce an FPU API, and replace the
current uses with the new API.

While this patchset is oriented towards deeper changes, as a first step it
simlifies xsave for kvm.

Avi Kivity (2):
  x86: eliminate TS_XSAVE
  x86: Introduce 'struct fpu' and related API

 arch/x86/include/asm/i387.h        |  135 +++++++++++++++++++++++++++---------
 arch/x86/include/asm/processor.h   |    6 ++-
 arch/x86/include/asm/thread_info.h |    1 -
 arch/x86/include/asm/xsave.h       |    7 +-
 arch/x86/kernel/cpu/common.c       |    5 +-
 arch/x86/kernel/i387.c             |  107 ++++++++++++++---------------
 arch/x86/kernel/process.c          |   20 +++---
 arch/x86/kernel/process_32.c       |    2 +-
 arch/x86/kernel/process_64.c       |    2 +-
 arch/x86/kernel/xsave.c            |    8 +-
 arch/x86/math-emu/fpu_aux.c        |    6 +-
 11 files changed, 181 insertions(+), 118 deletions(-)