On Thu, Apr 19, 2018 at 01:07:29PM -0400, Sinan Kaya wrote:
> 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.
The first patch does not apply to 4.4.y, and the second one does not
apply anywhere :(
Can you provide a series of backported patches that apply for me to
queue up?
thanks,
greg k-h