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    SubjectRe: [PATCH v17 08/10] ACPI / scan: do not enumerate Indirect IO host children
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    On 19/03/2018 10:30, Rafael J. Wysocki wrote:
    > On Wednesday, March 14, 2018 7:15:57 PM CET John Garry wrote:
    >> > Through the logical PIO framework systems which otherwise have
    >> > no IO space access to legacy ISA/LPC devices may access these
    >> > devices through so-called "indirect IO" method. In this, IO
    >> > space accesses for non-PCI hosts are redirected to a host
    >> > LLDD to manually generate the IO space (bus) accesses. Hosts
    >> > are able to register a region in logical PIO space to map to
    >> > its bus address range.
    >> >
    >> > Indirect IO child devices have an associated host-specific bus
    >> > address. Special translation is required to map between
    >> > a logical PIO address for a device and it's host bus address.
    >> >
    >> > Since in the ACPI tables the child device IO resources would
    >> > be the host-specific values, it is required the ACPI scan code
    >> > should not enumerate these devices, and that this should be
    >> > the responsibility of the host driver so that it can "fixup"
    >> > the resources so that they map to the appropriate logical PIO
    >> > addresses.
    >> >
    >> > To avoid enumerating these child devices, we add a check from
    >> > acpi_device_enumeration_by_parent() as to whether the parent
    >> > for a device is a member of a known list of "indirect IO" hosts.
    >> > For now, the HiSilicon LPC host controller ID is added.
    >> >
    >> > Signed-off-by: John Garry <john.garry@huawei.com>
    >> > Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
    > You have my ACK here already.
    >
    > Since I've ACKed the [7/10] too, I don't think there's anything more I can do
    > about this series and I'm assuming that it will be routed through other trees.
    >
    > Thanks!
    >

    Hi Rafael,

    Thanks for this.

    Yes, I am working on getting this whole series routed through another
    tree. Actually I think 7+8 could go separately since there is no build
    dependency, but I will try to keep the series together.

    All the best, And thanks again,
    John

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