[PATCH 0/3] Trap and propagate divide errors when emulating DIV

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



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.

tip: please queue the first patch on fast-forward-only branch kvm.git can
     merge, or we can carry the patch in kvm.git with your ack.

Avi Kivity (3):
  x86: allow kernel exception fixup for divide errors (#DE)
  KVM: x86 emulator: add macros for executing instructions that may
    trap
  KVM: x86 emulator: trap and propagate #DE from DIV and IDIV

 arch/x86/kernel/traps.c |   10 +++++++-
 arch/x86/kvm/emulate.c  |   60 ++++++++++++++++++++++++++++++++++++++++++++--
 2 files changed, 66 insertions(+), 4 deletions(-)

--
To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html


[Index of Archives]     [KVM ARM]     [KVM ia64]     [KVM ppc]     [Virtualization Tools]     [Spice Development]     [Libvirt]     [Libvirt Users]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite Questions]     [Linux Kernel]     [Linux SCSI]     [XFree86]
  Powered by Linux