Re: [PATCH V2] PCI: Add ACS quirk for Ampere root ports

2018-02-22 Thread Bjorn Helgaas
On Tue, Feb 20, 2018 at 07:19:27PM -0800, Feng Kan wrote: > The Ampere Computing PCIe root port does not support ACS at this point. > However, the hardware provides isolation and source validation through the > SMMU. The stream ID generated by the PCIe ports contain both the > bus/device/function

Re: [PATCH V2] PCI: Add ACS quirk for Ampere root ports

2018-02-22 Thread Bjorn Helgaas
On Tue, Feb 20, 2018 at 07:19:27PM -0800, Feng Kan wrote: > The Ampere Computing PCIe root port does not support ACS at this point. > However, the hardware provides isolation and source validation through the > SMMU. The stream ID generated by the PCIe ports contain both the > bus/device/function

[PATCH V2] PCI: Add ACS quirk for Ampere root ports

2018-02-20 Thread Feng Kan
The Ampere Computing PCIe root port does not support ACS at this point. However, the hardware provides isolation and source validation through the SMMU. The stream ID generated by the PCIe ports contain both the bus/device/function number as well as the port ID in its 3 most significant bits. Turn

[PATCH V2] PCI: Add ACS quirk for Ampere root ports

2018-02-20 Thread Feng Kan
The Ampere Computing PCIe root port does not support ACS at this point. However, the hardware provides isolation and source validation through the SMMU. The stream ID generated by the PCIe ports contain both the bus/device/function number as well as the port ID in its 3 most significant bits. Turn