Commit ea07e42d authored by Kyle Huey's avatar Kyle Huey Committed by Paolo Bonzini
Browse files

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



The trap flag stays set until software clears it.

Signed-off-by: default avatarKyle Huey <khuey@kylehuey.com>
Signed-off-by: default avatarRadim Krčmář <rkrcmar@redhat.com>
parent 6affcbed

arch/x86/kvm/x86.c

+0 −1
Original line number Diff line number Diff line
@@ -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