[GIT PULL] VFIO updates for v7.3-rc1

[GIT PULL] VFIO updates for v7.3-rc1

[Alex Williamson]

Hi Linus,

The following changes since commit a13c140cc289c0b7b3770bce5b3ad42ab35074aa:

  Linux 7.2-rc3 (2026-07-12 14:16:39 -0700)

are available in the Git repository at:

  https://github.com/awilliam/linux-vfio.git tags/vfio-v7.3-rc1

for you to fetch changes up to 4e3c1fc8abcb8eff062150b4340fa4569696d645:

  vfio/pci: Remove the pcie check for VFIO_PCI_ERR_IRQ_INDEX (2026-08-13 11:37:30 -0600)

----------------------------------------------------------------
VFIO updates for v7.3-rc1

 - Add nv_falcon vfio selftest driver.  The Falcon is a general-purpose
   microcontroller embedded within NVIDIA GPUs, presenting a relatively
   simple DMA programming interface.  This adds another selftest target
   for vfio-pci with real DMA transfers. (Rubin Du, Alex Williamson)

 - Add allocation assertion helpers to vfio selftests and use them to
   avoid variable length arrays and the compiler errors they generate.
   (Alex Mastro)

 - Fix use-after-free hazard where an init path error in MSI support
   leaves a stray pointer that can later be reused or double-freed.
   (Xiang Mei)

 - Fix previous refactor of PCI BAR mappings to honor non_mappable_bars
   flag, which otherwise generates a warning when trying to pci_iomap()
   a 256TiB BAR on ISM devices on s390. (Farhan Ali)

 - Add igb vfio selftest driver.  Like nv_falcon, this provides another
   target for DMA testing with vfio selftests, but importantly this
   driver supports both physical 82576 NICs and the emulation model in
   QEMU.  This therefore enables a vfio selftest vector with no physical
   hardware requirements. (Josh Hilke, Alex Williamson)

 - Mark selftest fixture objects __maybe_unused to accommodate builds
   with clang -Wunused-but-set-global. (David Matlack)

 - Add error recovery for vfio-pci devices on s390x.  This expands
   devices which expose the existing error eventfd and introduces a
   device feature for reporting firmware defined error state
   information to the user, allowing recovery through hypervisor
   channels. (Farhan Ali)

----------------------------------------------------------------
Alex Mastro (2):
      vfio: selftests: Add allocation assert helpers
      vfio: selftests: Avoid VLAs

Alex Williamson (2):
      vfio: selftests: Add helpers to re-enable interrupts
      Merge branch 'slot' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci into v7.3/vfio/s390x-pci-error-recovery

David Matlack (1):
      selftests: harness: Mark test fixture objects __maybe_unused

Farhan Ali (9):
      vfio/pci: Avoid mapping BARs for devices with non-mappable BARs
      PCI: Introduce PCI_SLOT_PLACEHOLDER constant for slot_nr placeholder value
      PCI: Allow per function PCI slots to fix slot reset on s390
      PCI: Avoid saving config space state if inaccessible
      PCI: Fail FLR when config space is inaccessible
      PCI/MSI: Enable memory decoding before restoring MSI-X messages
      s390/pci: Store PCI error information for passthrough devices
      vfio-pci/zdev: Add a device feature for error information
      vfio/pci: Remove the pcie check for VFIO_PCI_ERR_IRQ_INDEX

Josh Hilke (2):
      vfio: selftests: igb: Add driver for Intel 82576 device
      vfio: selftests: Retry on EAGAIN during device reset

Rubin Du (4):
      vfio: selftests: Add memcpy chunking to vfio_pci_driver_memcpy()
      vfio: selftests: Add generic PCI command register helpers
      vfio: selftests: Allow drivers without send_msi() support
      vfio: selftests: Add NVIDIA Falcon driver for DMA testing

Xiang Mei (1):
      vfio/pci: clear vdev->msi_perm after freeing it on init failure

 arch/s390/include/asm/pci.h                        |  32 +
 arch/s390/pci/pci.c                                |   1 +
 arch/s390/pci/pci_event.c                          | 137 ++--
 drivers/pci/hotplug/pnv_php.c                      |   2 +-
 drivers/pci/hotplug/rpaphp_slot.c                  |   2 +-
 drivers/pci/msi/msi.c                              |  10 +
 drivers/pci/pci.c                                  |  33 +-
 drivers/pci/slot.c                                 |  50 +-
 drivers/vfio/pci/vfio_pci_config.c                 |   1 +
 drivers/vfio/pci/vfio_pci_core.c                   |  13 +-
 drivers/vfio/pci/vfio_pci_intrs.c                  |   3 +-
 drivers/vfio/pci/vfio_pci_priv.h                   |   9 +
 drivers/vfio/pci/vfio_pci_zdev.c                   |  62 +-
 include/linux/pci.h                                |   8 +-
 include/uapi/linux/vfio.h                          |  21 +
 include/uapi/linux/vfio_zdev.h                     |   2 +
 tools/testing/selftests/kselftest_harness.h        |   2 +-
 .../selftests/vfio/lib/drivers/igb/e1000_82575.h   |   1 +
 .../selftests/vfio/lib/drivers/igb/e1000_defines.h |   1 +
 .../selftests/vfio/lib/drivers/igb/e1000_regs.h    |   1 +
 tools/testing/selftests/vfio/lib/drivers/igb/igb.c | 585 +++++++++++++++
 .../selftests/vfio/lib/drivers/nv_falcon/hw.h      | 352 +++++++++
 .../vfio/lib/drivers/nv_falcon/nv_falcon.c         | 783 +++++++++++++++++++++
 .../selftests/vfio/lib/include/libvfio/assert.h    |  18 +
 .../vfio/lib/include/libvfio/vfio_pci_device.h     |  29 +
 tools/testing/selftests/vfio/lib/iommu.c           |  12 +-
 tools/testing/selftests/vfio/lib/iova_allocator.c  |   4 +-
 tools/testing/selftests/vfio/lib/libvfio.mk        |   3 +
 tools/testing/selftests/vfio/lib/sysfs.c           |   3 +-
 tools/testing/selftests/vfio/lib/vfio_pci_device.c |  74 +-
 tools/testing/selftests/vfio/lib/vfio_pci_driver.c |  22 +-
 .../vfio/vfio_pci_device_init_perf_test.c          |   4 +-
 .../testing/selftests/vfio/vfio_pci_driver_test.c  |  57 +-
 33 files changed, 2196 insertions(+), 141 deletions(-)
 create mode 120000 tools/testing/selftests/vfio/lib/drivers/igb/e1000_82575.h
 create mode 120000 tools/testing/selftests/vfio/lib/drivers/igb/e1000_defines.h
 create mode 120000 tools/testing/selftests/vfio/lib/drivers/igb/e1000_regs.h
 create mode 100644 tools/testing/selftests/vfio/lib/drivers/igb/igb.c
 create mode 100644 tools/testing/selftests/vfio/lib/drivers/nv_falcon/hw.h
 create mode 100644 tools/testing/selftests/vfio/lib/drivers/nv_falcon/nv_falcon.c