[Qemu-devel] [PATCH v2 0/3] AER-KVM: Error containment of VFIO devices assigned to KVM guests

[Pandarathil, Vijaymohan R]

Add support for error containment when a VFIO device assigned to a KVM
guest encounters an error. This is for PCIe devices/drivers that support AER
functionality. When the host OS is notified of an error in a device either
through the firmware first approach or through an interrupt handled by the AER
root port driver, the error handler registered by the vfio-pci driver gets
invoked. The qemu process is signaled through an eventfd registered per
VFIO device by the qemu process. In the eventfd handler, qemu decides on
what action to take. In this implementation, guest is brought down to
contain the error.

v2:
 - Rebased to latest upstream stable bits
 - Changed the new ioctl to be part of VFIO_SET_IRQs ioctl
 - Added a new patch to get/put reference to a vfio device from struct device
 - Incorporated all other feedback.

---
Vijay Mohan Pandarathil(3):

[PATCH 1/3] VFIO: Wrappers for getting/putting reference to vfio_device
[PATCH 2/3] VFIO-AER: Vfio-pci driver changes for supporting AER
[PATCH 3/3] QEMU-AER: Qemu changes to support AER for VFIO-PCI devices

Kernel files changed

 drivers/vfio/vfio.c  | 47 +++++++++++++++++++++++++++++++++++++++++------
 include/linux/vfio.h |  3 +++
 2 files changed, 44 insertions(+), 6 deletions(-)

 drivers/vfio/pci/vfio_pci.c         | 44 ++++++++++++++++++++++++++++++++++++-
 drivers/vfio/pci/vfio_pci_intrs.c   | 32 +++++++++++++++++++++++++++
 drivers/vfio/pci/vfio_pci_private.h |  1 +
 include/uapi/linux/vfio.h           |  3 +++
 4 files changed, 79 insertions(+), 1 deletion(-)


Qemu files changed

 hw/vfio_pci.c              | 106 +++++++++++++++++++++++++++++++++++++++++++++
 linux-headers/linux/vfio.h |   3 ++
 2 files changed, 109 insertions(+)