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Commit ea07e42d authored Nov 29, 2016 by Kyle Huey Committed by Paolo Bonzini Dec 08, 2016

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>

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