vfio_pci_liveupdate_uapi_test:
$ tools/testing/selftests/vfio/scripts/setup.sh 0000:00:04.0
$ tools/testing/selftests/vfio/vfio_pci_liveupdate_uapi_test
0000:00:04.0
$ tools/testing/selftests/vfio/scripts/cleanup.sh
vfio_pci_liveupdate_kexec_test:
$ tools/testing/selftests/vfio/scripts/setup.sh 0000:00:04.0
$ tools/testing/selftests/vfio/vfio_pci_liveupdate_kexec_test --
stage 1 0000:00:04.0
$ kexec [...] # NOTE: distro-dependent
$ tools/testing/selftests/vfio/scripts/setup.sh 0000:00:04.0
$ tools/testing/selftests/vfio/vfio_pci_liveupdate_kexec_test --
stage 2 0000:00:04.0
$ tools/testing/selftests/vfio/scripts/cleanup.sh
Dependencies
------------
This series was constructed on top of several in-flight series and on
top of mm-nonmm-unstable [2].
+-- This series
|
+-- [PATCH v2 00/18] vfio: selftests: Support for multi-device tests
| https://lore.kernel.org/kvm/20251112192232.442761-1-
[email protected]/
|
+-- [PATCH v3 0/4] vfio: selftests: update DMA mapping tests to use
queried IOVA ranges
| https://lore.kernel.org/kvm/20251111-iova-ranges-
[email protected]/
|
+-- [PATCH v8 0/2] Live Update: File-Lifecycle-Bound (FLB) State
| https://lore.kernel.org/linux-mm/20251125225006.3722394-1-
[email protected]/
|
+-- [PATCH v8 00/18] Live Update Orchestrator
| https://lore.kernel.org/linux-mm/20251125165850.3389713-1-
[email protected]/
|
To simplify checking out the code, this series can be found on GitHub:
https://github.com/dmatlack/linux/tree/liveupdate/vfio/cdev/v1
Changelog
---------
v1:
- Rebase series on top of LUOv8 and VFIO selftests improvements
- Drop commits to preserve config space fields across Live Update.
These changes require changes to the PCI layer. For exmaple,
preserving rbars could lead to an inconsistent device state until
device BARs addresses are preserved across Live Update.
- Drop commits to preserve Bus Master Enable on the device. There's no
reason to preserve this until iommufd preservation is fully working.
Furthermore, preserving Bus Master Enable could lead to memory
corruption when the device if the device is bound to the default
identity-map domain after Live Update.
- Drop commits to preserve saved PCI state. This work is not needed
until we are ready to preserve the device's config space, and
requires more thought to make the PCI state data layout ABI-friendly.
- Add support to skip auto-probing devices that are preserved by VFIO
to avoid them getting bound to a different driver by the next kernel.
- Restrict device preservation further (no VFs, no intel-graphics).
- Various refactoring and small edits to improve readability and
eliminate code duplication.
rfc: https://lore.kernel.org/kvm/20251018000713.677779-1-
[email protected]/
Cc: Saeed Mahameed <[email protected]>
Cc: Adithya Jayachandran <[email protected]>
Cc: Jason Gunthorpe <[email protected]>
Cc: Parav Pandit <[email protected]>
Cc: Leon Romanovsky <[email protected]>
Cc: William Tu <[email protected]>
Cc: Jacob Pan <[email protected]>
Cc: Lukas Wunner <[email protected]>
Cc: Pasha Tatashin <[email protected]>
Cc: Mike Rapoport <[email protected]>
Cc: Pratyush Yadav <[email protected]>
Cc: Samiullah Khawaja <[email protected]>
Cc: Chris Li <[email protected]>
Cc: Josh Hilke <[email protected]>
Cc: David Rientjes <[email protected]>
[1] https://lore.kernel.org/linux-iommu/20250928190624.3735830-1-
[email protected]/
[2] https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git/log/?
h=mm-nonmm-unstable
David Matlack (12):
liveupdate: luo_flb: Prevent retrieve() after finish()
PCI: Add API to track PCI devices preserved across Live Update
PCI: Require driver_override for incoming Live Update preserved
devices
vfio/pci: Notify PCI subsystem about devices preserved across Live
Update
vfio: Enforce preserved devices are retrieved via
LIVEUPDATE_SESSION_RETRIEVE_FD
vfio/pci: Store Live Update state in struct vfio_pci_core_device
vfio: selftests: Add Makefile support for TEST_GEN_PROGS_EXTENDED
vfio: selftests: Add vfio_pci_liveupdate_uapi_test
vfio: selftests: Expose iommu_modes to tests
vfio: selftests: Expose low-level helper routines for setting up
struct vfio_pci_device
vfio: selftests: Verify that opening VFIO device fails during Live
Update
vfio: selftests: Add continuous DMA to vfio_pci_liveupdate_kexec_test
Vipin Sharma (9):
vfio/pci: Register a file handler with Live Update Orchestrator
vfio/pci: Preserve vfio-pci device files across Live Update
vfio/pci: Retrieve preserved device files after Live Update
vfio/pci: Skip reset of preserved device after Live Update
selftests/liveupdate: Move luo_test_utils.* into a reusable library
selftests/liveupdate: Add helpers to preserve/retrieve FDs
vfio: selftests: Build liveupdate library in VFIO selftests
vfio: selftests: Initialize vfio_pci_device using a VFIO cdev FD
vfio: selftests: Add vfio_pci_liveupdate_kexec_test
MAINTAINERS | 1 +
drivers/pci/Makefile | 1 +
drivers/pci/liveupdate.c | 248 ++++++++++++++++
drivers/pci/pci-driver.c | 12 +-
drivers/vfio/device_cdev.c | 25 +-
drivers/vfio/group.c | 9 +
drivers/vfio/pci/Makefile | 1 +
drivers/vfio/pci/vfio_pci.c | 11 +-
drivers/vfio/pci/vfio_pci_core.c | 23 +-
drivers/vfio/pci/vfio_pci_liveupdate.c | 278 ++++++++++++++++++
drivers/vfio/pci/vfio_pci_priv.h | 16 +
drivers/vfio/vfio.h | 13 -
drivers/vfio/vfio_main.c | 22 +-
include/linux/kho/abi/pci.h | 53 ++++
include/linux/kho/abi/vfio_pci.h | 45 +++
include/linux/liveupdate.h | 3 +
include/linux/pci.h | 38 +++
include/linux/vfio.h | 51 ++++
include/linux/vfio_pci_core.h | 7 +
kernel/liveupdate/luo_flb.c | 4 +
tools/testing/selftests/liveupdate/.gitignore | 1 +
tools/testing/selftests/liveupdate/Makefile | 14 +-
.../include/libliveupdate.h} | 11 +-
.../selftests/liveupdate/lib/libliveupdate.mk | 20 ++
.../{luo_test_utils.c => lib/liveupdate.c} | 43 ++-
.../selftests/liveupdate/luo_kexec_simple.c | 2 +-
.../selftests/liveupdate/luo_multi_session.c | 2 +-
tools/testing/selftests/vfio/Makefile | 23 +-
.../vfio/lib/include/libvfio/iommu.h | 2 +
.../lib/include/libvfio/vfio_pci_device.h | 8 +
tools/testing/selftests/vfio/lib/iommu.c | 4 +-
.../selftests/vfio/lib/vfio_pci_device.c | 60 +++-
.../vfio/vfio_pci_liveupdate_kexec_test.c | 255 ++++++++++++++++
.../vfio/vfio_pci_liveupdate_uapi_test.c | 93 ++++++
34 files changed, 1313 insertions(+), 86 deletions(-)
create mode 100644 drivers/pci/liveupdate.c
create mode 100644 drivers/vfio/pci/vfio_pci_liveupdate.c
create mode 100644 include/linux/kho/abi/pci.h
create mode 100644 include/linux/kho/abi/vfio_pci.h
rename tools/testing/selftests/liveupdate/{luo_test_utils.h => lib/
include/libliveupdate.h} (80%)
create mode 100644 tools/testing/selftests/liveupdate/lib/
libliveupdate.mk
rename tools/testing/selftests/liveupdate/{luo_test_utils.c => lib/
liveupdate.c} (89%)
create mode 100644 tools/testing/selftests/vfio/
vfio_pci_liveupdate_kexec_test.c
create mode 100644 tools/testing/selftests/vfio/
vfio_pci_liveupdate_uapi_test.c
