Hi Greg,
Upstream commit cf0d53ba4947 ("vfio/pci: Virtualize Maximum Read Request
Size") and commit 523184972b28 ("vfio/pci: Virtualize Maximum Payload Size")
fixes nasty PCIe virtualization issues for platforms that support Maximum
Payload Size bigger than 128.
Issue shows up when a device is assigned to the guest machine as a passthrough.
Guest machine configures the MPS/MRRS settings to values that are incompatible
with the parent bridge device.
This causes PCIe transaction timeouts and AER errors to be spilled in the host
kernel.
Please apply commit cf0d53ba4947 and 523184972b28 to all affected releases to
fix the resulting regression.
Thanks,
Sinan
--
Sinan Kaya
Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc.
Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.