[v2,0/2] Add Error Recovery support for Virtio PCI devices

Message

Israel Rukshin Nov. 27, 2024, 6:57 a.m. UTC

This patch series introduces an initial PCI Error Recovery support for
Virtio PCI devices, focusing on Function Level Reset (FLR) recovery.
The implementation aligns with the existing PCI error recovery
framework,
which provides a mechanism for coordinating between affected device
drivers and PCI controllers during reset and recovery phases.

By integrating Virtio PCI devices into this framework, we enhance the
system's ability to handle and recover from PCI errors, particularly
those requiring FLR (this patch set). This capability was previously
unavailable for Virtio PCI devices post-probe, and its addition
significantly improves system reliability and resiliency.

The series consists of two main patches:

1. Virtio PCI: implement the necessary infrastructure and callbacks
   in the virtio_pci driver to handle FLR events properly.

2. Virtio Block: Implement proper cleanup and recovery procedures upon
   FLR events.

Changes from v1 to v2:
 - Don't print warning with -EOPNOTSUPP error.

Israel Rukshin (2):
  virtio_pci: Add support for PCIe Function Level Reset
  virtio_blk: Add support for transport error recovery

 drivers/block/virtio_blk.c         | 28 ++++++++-
 drivers/virtio/virtio.c            | 94 ++++++++++++++++++++++--------
 drivers/virtio/virtio_pci_common.c | 41 +++++++++++++
 include/linux/virtio.h             |  8 +++
 4 files changed, 143 insertions(+), 28 deletions(-)