When entering an exception after an ICEBP, the saved instruction pointer should point to after the instruction. This fixes the bug here: https://bugs.launchpad.net/qemu/+bug/1119686 Signed-off-by: Huw Davies <huw@xxxxxxxxxxxxxxx> --- v2: Mask off DR6_RESERVED before comparing to zero. arch/x86/kvm/vmx.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 1f68c58..930a0df 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -4841,6 +4841,9 @@ static int handle_exception(struct kvm_vcpu *vcpu) (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP))) { vcpu->arch.dr6 &= ~15; vcpu->arch.dr6 |= dr6; + if (!(dr6 & ~DR6_RESERVED)) /* icebp */ + skip_emulated_instruction(vcpu); + kvm_queue_exception(vcpu, DB_VECTOR); return 1; } -- 1.8.0 -- 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
