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

[Marcelo Tosatti <mtosatti@redhat.com>]

On Thu, Aug 26, 2010 at 11:58:59AM +0300, Avi Kivity wrote:
> 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(-)

Applied, thanks.