Messages in this thread | | | Subject | Re: [PATCH v17 08/10] ACPI / scan: do not enumerate Indirect IO host children | From | John Garry <> | Date | Mon, 19 Mar 2018 10:48:34 +0000 |
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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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