On Fri, 9 Mar 2018 18:03:14 +0100 Oliver Heid <oliver.h...@h-next.de> wrote:
> Does VFIO somehow limit PCIe TLP size to 128 bytes on virtualized > devices? In our case MaxPayload = MaxReadReq = 256 bytes in PCI config, > and we use 4k aligned base addresses and do not cross 4k boundaries, but > actual package size is only 128B. Any idea how to get 256 byte TLPs? See: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/vfio/pci/vfio_pci_config.c?id=523184972b282cd9ca17a76f6ca4742394856818 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/vfio/pci/vfio_pci_config.c?id=cf0d53ba4947aad6e471491d5b20a567cbe92e56 And to tune the host MPS settings: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/admin-guide/kernel-parameters.txt#n3058 Suggestions for improvement welcome. Thanks, Alex _______________________________________________ vfio-users mailing list vfio-users@redhat.com https://www.redhat.com/mailman/listinfo/vfio-users
