[PATCH v5 0/8] vfio/hisilicon: add ACC live migration driver
From: Shameer Kolothum
Date: Mon Feb 21 2022 - 06:41:18 EST
Hi,
This series attempts to add vfio live migration support for
HiSilicon ACC VF devices based on the new v2 migration protocol
definition and mlx5 v8 series discussed here[0].
RFCv4 --> v5
- Dropped RFC tag as v2 migration APIs are more stable now.
- Addressed review comments from Jason and Alex (Thanks!).
This is sanity tested on a HiSilicon platform using the Qemu branch
provided here[1].
Please take a look and let me know your feedback.
Thanks,
Shameer
[0] https://lore.kernel.org/kvm/20220220095716.153757-1-yishaih@xxxxxxxxxx/
[1] https://github.com/jgunthorpe/qemu/commits/vfio_migration_v2
v3 --> RFCv4
-Based on migration v2 protocol and mlx5 v7 series.
-Added RFC tag again as migration v2 protocol is still under discussion.
-Added new patch #6 to retrieve the PF QM data.
-PRE_COPY compatibility check is now done after the migration data
transfer. This is not ideal and needs discussion.
RFC v2 --> v3
-Dropped RFC tag as the vfio_pci_core subsystem framework is now
part of 5.15-rc1.
-Added override methods for vfio_device_ops read/write/mmap calls
to limit the access within the functional register space.
-Patches 1 to 3 are code refactoring to move the common ACC QM
definitions and header around.
RFCv1 --> RFCv2
-Adds a new vendor-specific vfio_pci driver(hisi-acc-vfio-pci)
for HiSilicon ACC VF devices based on the new vfio-pci-core
framework proposal.
-Since HiSilicon ACC VF device MMIO space contains both the
functional register space and migration control register space,
override the vfio_device_ops ioctl method to report only the
functional space to VMs.
-For a successful migration, we still need access to VF dev
functional register space mainly to read the status registers.
But accessing these while the Guest vCPUs are running may leave
a security hole. To avoid any potential security issues, we
map/unmap the MMIO regions on a need basis and is safe to do so.
(Please see hisi_acc_vf_ioremap/unmap() fns in patch #4).
-Dropped debugfs support for now.
-Uses common QM functions for mailbox access(patch #3).
Longfang Liu (2):
crypto: hisilicon/qm: Move few definitions to common header
hisi_acc_vfio_pci: Add support for VFIO live migration
Shameer Kolothum (6):
crypto: hisilicon/qm: Move the QM header to include/linux
hisi_acc_qm: Move PCI device IDs to common header
hisi_acc_vfio_pci: add new vfio_pci driver for HiSilicon ACC devices
hisi_acc_vfio_pci: Restrict access to VF dev BAR2 migration region
hisi_acc_vfio_pci: Add helper to retrieve the PF qm data
hisi_acc_vfio_pci: Use its own PCI reset_done error handler
drivers/crypto/hisilicon/hpre/hpre.h | 2 +-
drivers/crypto/hisilicon/hpre/hpre_main.c | 18 +-
drivers/crypto/hisilicon/qm.c | 34 +-
drivers/crypto/hisilicon/sec2/sec.h | 2 +-
drivers/crypto/hisilicon/sec2/sec_main.c | 20 +-
drivers/crypto/hisilicon/sgl.c | 2 +-
drivers/crypto/hisilicon/zip/zip.h | 2 +-
drivers/crypto/hisilicon/zip/zip_main.c | 17 +-
drivers/vfio/pci/Kconfig | 2 +
drivers/vfio/pci/Makefile | 2 +
drivers/vfio/pci/hisilicon/Kconfig | 16 +
drivers/vfio/pci/hisilicon/Makefile | 4 +
.../vfio/pci/hisilicon/hisi_acc_vfio_pci.c | 1316 +++++++++++++++++
.../vfio/pci/hisilicon/hisi_acc_vfio_pci.h | 119 ++
.../qm.h => include/linux/hisi_acc_qm.h | 44 +
include/linux/pci_ids.h | 6 +
16 files changed, 1552 insertions(+), 54 deletions(-)
create mode 100644 drivers/vfio/pci/hisilicon/Kconfig
create mode 100644 drivers/vfio/pci/hisilicon/Makefile
create mode 100644 drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c
create mode 100644 drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.h
rename drivers/crypto/hisilicon/qm.h => include/linux/hisi_acc_qm.h (88%)
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2.25.1