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Date: Mon, 4 Dec 2023 19:18:50 +0800
From: "Cao, Yahui" <yahui.cao@...el.com>
To: <jgg@...dia.com>, <alex.williamson@...hat.com>
CC: <kvm@...r.kernel.org>, <netdev@...r.kernel.org>, <lingyu.liu@...el.com>,
<kevin.tian@...el.com>, <madhu.chittim@...el.com>,
<sridhar.samudrala@...el.com>, <yishaih@...dia.com>,
<shameerali.kolothum.thodi@...wei.com>, <brett.creeley@....com>,
<davem@...emloft.net>, <edumazet@...gle.com>, <kuba@...nel.org>,
<pabeni@...hat.com>, <intel-wired-lan@...ts.osuosl.org>
Subject: Re: [PATCH iwl-next v4 00/12] Add E800 live migration driver
On 11/21/2023 10:50 AM, Yahui Cao wrote:
> This series adds vfio live migration support for Intel E810 VF devices
> based on the v2 migration protocol definition series discussed here[0].
>
> Steps to test:
> 1. Bind one or more E810 VF devices to the module ice-vfio-pci.ko
> 2. Assign the VFs to the virtual machine and enable device live migration
> 3. Run a workload using IAVF inside the VM, for example, iperf.
> 4. Migrate the VM from the source node to a destination node.
>
> The series is also available for review here[1].
>
> Thanks,
> Yahui
> [0] https://lore.kernel.org/kvm/20220224142024.147653-1-yishaih@nvidia.com/
> [1] https://git.kernel.org/pub/scm/linux/kernel/git/tnguy/linux.git/log/?h=ice_live_migration
>
> Change log:
>
> v4:
> - Remove unnecessary iomap from vfio variant driver
> - Change Kconfig to select VFIO_PCI_CORE for ICE_VFIO_PCI module (Alex)
> - Replace restore state with load state for naming convention
> - Remove RXDID Patch
> - Fix missed comments in Patch03
> - Remove "so" at the beginning of the sentence and fix other grammar issue.
> - Remove double init and change return logic for Patch 10
> - Change ice_migration_unlog_vf_msg comments for Patch04
> - Add r-b from Michal to Patch04 of v4
> - Change ice_migration_is_loggable_msg return value type into bool type for Patch05
> - Change naming from dirtied to dirty for Patch11
> - Use total_length to pass parameter to save/load function instead of macro for Patch12
> - Refactor timeout logic for Patch09
> - Change migration_enabled from bool into u8:1 type for Patch04
> - Fix 80 max line length limit issue and compilation warning
> - Add r-b from Igor to all the patches of v4
> - Fix incorrect type in assignment of __le16/32 for Patch06
> - Change product name to from E800 to E810
>
> v3: https://lore.kernel.org/intel-wired-lan/20230918062546.40419-1-yahui.cao@intel.com/
> - Add P2P support in vfio driver (Jason)
> - Remove source/destination check in vfio driver (Jason)
> - Restructure PF exported API with proper types and layering (Jason)
> - Change patchset email sender.
> - Reword commit message and comments to be more reviewer-friendly (Kevin)
> - Add s-o-b for Patch01 (Kevin)
> - Merge Patch08 into Patch04 and merge Patch13 into Patch06 (Kevin)
> - Remove uninit() in VF destroy stage for Patch 05 (Kevin)
> - change migration_active to migration_enabled (Kevin)
> - Add total_size in devstate to greatly simplify the various checks for
> Patch07 (Kevin)
> - Add magic and version in device state for Patch07 (Kevin)
> - Fix rx head init issue in Patch10 (Kevin)
> - Remove DMA access for Guest Memory at device resume stage and deprecate
> the approach to restore TX head in VF space, instead restore TX head in
> PF space and then switch context back to VF space which is transparent
> to Guest for Patch11 (Jason, Kevin)
> - Use non-interrupt mode instead of VF MSIX vector to restore TX head for
> Patch11 (Kevin)
> - Move VF pci mmio save/restore from vfio driver into PF driver
> - Add configuration match check at device resume stage (Kevin)
> - Remove sleep before stopping queue at device suspend stage (Kevin)
> - Let PF respond failure to VF if virtual channel messages logging failed (Kevin)
> - Add migration setup and description in cover letter
>
> v2: https://lore.kernel.org/intel-wired-lan/20230621091112.44945-1-lingyu.liu@intel.com/
> - clarified comments and commit message
>
> v1: https://lore.kernel.org/intel-wired-lan/20230620100001.5331-1-lingyu.liu@intel.com/
>
> ---
>
>
> Lingyu Liu (9):
> ice: Introduce VF state ICE_VF_STATE_REPLAYING_VC for migration
> ice: Add fundamental migration init and exit function
> ice: Log virtual channel messages in PF
> ice: Add device state save/load function for migration
> ice: Fix VSI id in virtual channel message for migration
> ice: Save and load RX Queue head
> ice: Save and load TX Queue head
> ice: Add device suspend function for migration
> vfio/ice: Implement vfio_pci driver for E800 devices
>
> Yahui Cao (3):
> ice: Add function to get RX queue context
> ice: Add function to get and set TX queue context
> ice: Save and load mmio registers
>
> MAINTAINERS | 7 +
> drivers/net/ethernet/intel/ice/Makefile | 1 +
> drivers/net/ethernet/intel/ice/ice.h | 3 +
> drivers/net/ethernet/intel/ice/ice_common.c | 484 +++++-
> drivers/net/ethernet/intel/ice/ice_common.h | 11 +
> .../net/ethernet/intel/ice/ice_hw_autogen.h | 23 +
> .../net/ethernet/intel/ice/ice_lan_tx_rx.h | 3 +
> drivers/net/ethernet/intel/ice/ice_main.c | 15 +
> .../net/ethernet/intel/ice/ice_migration.c | 1378 +++++++++++++++++
> .../intel/ice/ice_migration_private.h | 49 +
> drivers/net/ethernet/intel/ice/ice_vf_lib.c | 4 +
> drivers/net/ethernet/intel/ice/ice_vf_lib.h | 11 +
> drivers/net/ethernet/intel/ice/ice_virtchnl.c | 256 ++-
> drivers/net/ethernet/intel/ice/ice_virtchnl.h | 15 +-
> .../ethernet/intel/ice/ice_virtchnl_fdir.c | 28 +-
> drivers/vfio/pci/Kconfig | 2 +
> drivers/vfio/pci/Makefile | 2 +
> drivers/vfio/pci/ice/Kconfig | 10 +
> drivers/vfio/pci/ice/Makefile | 4 +
> drivers/vfio/pci/ice/ice_vfio_pci.c | 707 +++++++++
> include/linux/net/intel/ice_migration.h | 48 +
> 21 files changed, 2962 insertions(+), 99 deletions(-)
> create mode 100644 drivers/net/ethernet/intel/ice/ice_migration.c
> create mode 100644 drivers/net/ethernet/intel/ice/ice_migration_private.h
> create mode 100644 drivers/vfio/pci/ice/Kconfig
> create mode 100644 drivers/vfio/pci/ice/Makefile
> create mode 100644 drivers/vfio/pci/ice/ice_vfio_pci.c
> create mode 100644 include/linux/net/intel/ice_migration.h
>
Hey Jason & Alex,
Did you have any chance to review this v4 patchset ?
The branch is published as
https://git.kernel.org/pub/scm/linux/kernel/git/tnguy/linux.git/log/?h=ice_live_migration
as requested.
These patches are based on top of commit b85ea95d0864 ("Linux
6.7-rc1") and being sent as a whole for ease of review. A branch/shared
pull request for the networking portion of these patches (1-11) will be
sent when review is complete.
Thanks.
Yahui.
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