Messages in this thread |  | | From | Arnd Bergmann <> | Subject | Re: [RFC part1 PATCH 1/7] ACPI: Make ACPI core running without PCI on ARM64 | Date | Thu, 5 Dec 2013 23:04:22 +0100 |
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On Wednesday 04 December 2013, Hanjun Guo wrote: > On 2013年12月04日 00:41, Matthew Garrett wrote: > > Given the number of #ifdefs you're adding, wouldn't it make more sense > > to just add stub functions to include/linux/pci.h? > > Thanks for the suggestion :) > > I can add stub functions in include/linux/pci.h for raw_pci_read()/ > raw_pci_write(), then can remove #ifdefs for acpi_os_read/write_pci_configuration().
Actually I wonder about the usefulness of this patch in either form: Since ACPI on ARM64 is only for servers, I would very much expect them to always come with PCI, either physical host bridges with attached devices, or logical PCI functions used to describe the on-SoC I/O devices. Even in case of virtual machines, you'd normally use PCI as the method to communicate data about the virtio channels.
Can you name a realistic use-case where you'd want ACPI but not PCI?
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