KVM: x86: Do not clear RFLAGS.TF when a singlestep trap occurs.

The trap flag stays set until software clears it. Signed-off-by: Kyle Huey <khuey@kylehuey.com> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
mariux64 · Dec 8, 2016 · ea07e42 · ea07e42
1 parent 6affcbe
commit ea07e42
Showing 1 changed file with 0 additions and 1 deletion.
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
@@ -5419,7 +5419,6 @@ static void kvm_vcpu_check_singlestep(struct kvm_vcpu *vcpu, unsigned long rflag
 			kvm_run->exit_reason = KVM_EXIT_DEBUG;
 			*r = EMULATE_USER_EXIT;
 		} else {
-			vcpu->arch.emulate_ctxt.eflags &= ~X86_EFLAGS_TF;
 			/*
 			 * "Certain debug exceptions may clear bit 0-3.  The
 			 * remaining contents of the DR6 register are never