[PATCH v2 0/2] Trap and propagate divide errors when emulating DIV

[Avi Kivity <avi@redhat.com>]

KVM recently started emulating DIV and IDIV.  However, those instructions
trap when given the right operands.  Since figuring out when to trap or not
is difficult, we just execute the instruction and see if the processor trapped
or not.

Avi Kivity (2):
  x86: allow kernel exception fixup for divide errors (#DE)
    - dropped
  KVM: x86 emulator: add macros for executing instructions that may
    trap
  KVM: x86 emulator: trap and propagate #DE from DIV and IDIV
    - propagate return code to x86_emulate_insn()

 arch/x86/kvm/emulate.c |   63 ++++++++++++++++++++++++++++++++++++++++++++---
 1 files changed, 59 insertions(+), 4 deletions(-)