> -----Original Message----- > From: liulongfang <liulongfang@xxxxxxxxxx> > Sent: Monday, November 4, 2024 8:31 AM > To: Alex Williamson <alex.williamson@xxxxxxxxxx> > Cc: jgg@xxxxxxxxxx; Shameerali Kolothum Thodi > <shameerali.kolothum.thodi@xxxxxxxxxx>; Jonathan Cameron > <jonathan.cameron@xxxxxxxxxx>; kvm@xxxxxxxxxxxxxxx; linux- > kernel@xxxxxxxxxxxxxxx; linuxarm@xxxxxxxxxxxxx > Subject: Re: [PATCH v11 3/4] hisi_acc_vfio_pci: register debugfs for hisilicon > migration driver [...] > >>> + > >>> + seq_printf(seq, > >>> + "acc device:\n" > >>> + "guest driver load: %u\n" > >>> + "device opened: %d\n" > >>> + "migrate data length: %lu\n", > >>> + hisi_acc_vdev->vf_qm_state, > >>> + hisi_acc_vdev->dev_opened, > >>> + debug_migf->total_length); > >> > >> This debugfs entry is described as returning the data from the last > >> migration, but vf_qm_state and dev_opened are relative to the current > >> device/guest driver state. Both seem to have no relevance to the data > >> in debug_migf. > >> > > > > The benefit of dev_opened retention is that user can obtain the device > status > > during the cat migf_data operation. > > > > I will remove dev_opened in the next version. > And hisi_acc_vdev->vf_qm_state is changed to debug_migf- > >vf_data.vf_qm_state > Keep information about whether the device driver in the Guest OS is loaded > when live migration occurs. I think you already get that when you dump debug_migf->vf_data. So not required. Thanks, Shameer
