From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Huth Date: Mon, 11 Apr 2016 09:45:31 +0000 Subject: Re: [PATCH v2] kvm-pr: manage single-step mode Message-Id: <570B723B.7010404@redhat.com> List-Id: References: <1460131500-19560-1-git-send-email-lvivier@redhat.com> In-Reply-To: <1460131500-19560-1-git-send-email-lvivier@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Laurent Vivier , kvm-ppc@vger.kernel.org, kvm@vger.kernel.org Cc: Gleb Natapov , Paolo Bonzini , Alexander Graf , Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, dgibson@redhat.com On 08.04.2016 18:05, Laurent Vivier wrote: > Until now, when we connect gdb to the QEMU gdb-server, the > single-step mode is not managed. > > This patch adds this, only for kvm-pr: > > If KVM_GUESTDBG_SINGLESTEP is set, we enable single-step trace bit in the > MSR (MSR_SE) just before the __kvmppc_vcpu_run(), and disable it just after. > In kvmppc_handle_exit_pr, instead of routing the interrupt to > the guest, we return to host, with KVM_EXIT_DEBUG reason. > > Signed-off-by: Laurent Vivier > --- > v2: split BOOK3S_INTERRUPT_MACHINE_CHECK and BOOK3S_INTERRUPT_TRACE > > arch/powerpc/kvm/book3s_pr.c | 32 +++++++++++++++++++++++++++++++- > 1 file changed, 31 insertions(+), 1 deletion(-) Reviewed-by: Thomas Huth