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Thu, 29 Aug 2019 12:53:54 +0000 Received: from abhmp0004.oracle.com (abhmp0004.oracle.com [141.146.116.10]) by userv0122.oracle.com (8.14.4/8.14.4) with ESMTP id x7TCrIM3022396; Thu, 29 Aug 2019 12:53:19 GMT Received: from lap1 (/10.175.46.168) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Thu, 29 Aug 2019 05:53:17 -0700 Date: Thu, 29 Aug 2019 15:53:14 +0300 From: Yuval Shaia To: Sukrit Bhatnagar Message-ID: <20190829125313.GB9911@lap1> References: <20190828142328.24561-1-skrtbhtngr@gmail.com> <20190828142328.24561-3-skrtbhtngr@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190828142328.24561-3-skrtbhtngr@gmail.com> User-Agent: Mutt/1.10.1 (2018-07-13) X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9363 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1906280000 definitions=main-1908290142 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9363 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1906280000 definitions=main-1908290141 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] X-Received-From: 156.151.31.86 Subject: Re: [Qemu-devel] [PATCH v1 2/2] hw/pvrdma: add live migration support X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Wed, Aug 28, 2019 at 07:53:28PM +0530, Sukrit Bhatnagar wrote: > vmstate_pvrdma describes the PCI and MSIX states as well as the dma > address for dsr and the gid table of device. > vmstate_pvrdma_gids describes each gid in the gid table. > > pvrdma_post_save() does the job of unregistering gid entries from the > backend device in the source host. > > pvrdma_post_load() maps to dsr using the loaded dma address, registers > each loaded gid into the backend device, and finally calls load_dsr() > to perform other mappings and ring init operations. I think it worth to mention that the dma address is kept in driver/device shared memory (dsr->dma) which is migrated as part of memory migration and it is out of the scope of this change and so we do not need to save/load the dma address during migration. Also you should specifically comment that this migration-support does not includes QP migration. This means that support for life migration *during* traffic is not yet supported. > > Cc: Marcel Apfelbaum > Cc: Yuval Shaia > Signed-off-by: Sukrit Bhatnagar > --- > hw/rdma/vmw/pvrdma_main.c | 77 +++++++++++++++++++++++++++++++++++++++ > 1 file changed, 77 insertions(+) > > diff --git a/hw/rdma/vmw/pvrdma_main.c b/hw/rdma/vmw/pvrdma_main.c > index 6c90db96f9..6f8b56dea3 100644 > --- a/hw/rdma/vmw/pvrdma_main.c > +++ b/hw/rdma/vmw/pvrdma_main.c > @@ -28,6 +28,7 @@ > #include "sysemu/sysemu.h" > #include "monitor/monitor.h" > #include "hw/rdma/rdma.h" > +#include "migration/register.h" > > #include "../rdma_rm.h" > #include "../rdma_backend.h" > @@ -593,6 +594,81 @@ static void pvrdma_shutdown_notifier(Notifier *n, void *opaque) > pvrdma_fini(pci_dev); > } > > +static int pvrdma_post_save(void *opaque) > +{ > + int i, rc; > + PVRDMADev *dev = opaque; > + > + for (i = 0; i < MAX_GIDS; i++) { > + Empty line is redundant here. > + if (!dev->rdma_dev_res.port.gid_tbl[i].gid.global.interface_id) { > + continue; > + } > + rc = rdma_backend_del_gid(&dev->backend_dev, > + dev->backend_eth_device_name, > + &dev->rdma_dev_res.port.gid_tbl[i].gid); > + if (rc) { > + return -EINVAL; Some error report will help here i guess. > + } > + } > + > + return 0; > +} > + > +static int pvrdma_post_load(void *opaque, int version_id) > +{ > + int i, rc; > + PVRDMADev *dev = opaque; > + PCIDevice *pci_dev = PCI_DEVICE(dev); > + DSRInfo *dsr_info = &dev->dsr_info; > + > + dsr_info->dsr = rdma_pci_dma_map(pci_dev, dsr_info->dma, > + sizeof(struct pvrdma_device_shared_region)); > + if (!dsr_info->dsr) { > + rdma_error_report("Failed to map to DSR"); > + return -ENOMEM; > + } > + > + for (i = 0; i < MAX_GIDS; i++) { > + Empty line is redundant here. > + if (!dev->rdma_dev_res.port.gid_tbl[i].gid.global.interface_id) { > + continue; > + } > + > + rc = rdma_backend_add_gid(&dev->backend_dev, > + dev->backend_eth_device_name, > + &dev->rdma_dev_res.port.gid_tbl[i].gid); > + if (rc) { > + return -EINVAL; > + } > + } > + > + return load_dsr(dev); > +} > + > +static const VMStateDescription vmstate_pvrdma_gids = { > + .name = "pvrdma-gids", > + .fields = (VMStateField[]) { > + VMSTATE_UINT8_ARRAY_V(gid.raw, RdmaRmGid, 16, 0), > + VMSTATE_END_OF_LIST() > + } > +}; > + > +static const VMStateDescription vmstate_pvrdma = { > + .name = PVRDMA_HW_NAME, > + .post_save = pvrdma_post_save, > + .post_load = pvrdma_post_load, > + .fields = (VMStateField[]) { > + VMSTATE_PCI_DEVICE(parent_obj, PVRDMADev), > + VMSTATE_MSIX(parent_obj, PVRDMADev), > + VMSTATE_UINT64(dsr_info.dma, PVRDMADev), > + VMSTATE_STRUCT_ARRAY(rdma_dev_res.port.gid_tbl, PVRDMADev, > + MAX_PORT_GIDS, 0, vmstate_pvrdma_gids, > + RdmaRmGid), > + VMSTATE_END_OF_LIST() > + } > +}; > + > static void pvrdma_realize(PCIDevice *pdev, Error **errp) > { > int rc = 0; > @@ -688,6 +764,7 @@ static void pvrdma_class_init(ObjectClass *klass, void *data) > > dc->desc = "RDMA Device"; > dc->props = pvrdma_dev_properties; > + dc->vmsd = &vmstate_pvrdma; > set_bit(DEVICE_CATEGORY_NETWORK, dc->categories); > > ir->print_statistics = pvrdma_print_statistics; > -- > 2.21.0 > >