Memory and IO space Enabling different in x86 and ARM64

[Bharat Kumar Gogada]

> Subject: Re: Memory and IO space Enabling different in x86 and ARM64
>
> On Friday, July 15, 2016 8:29:49 AM CEST Bharat Kumar Gogada wrote:
> > I observe that memory and IO space are enabled by BIOS in x86.
> >
> > In ARM64 we need to call pci_enable_device form End Point to enable
> these resources.
> >
> > Why the resource enablement is different in x86 and ARM64 ?
> >
> > Please correct me if my observation is wrong.
>
> This is a difference between systems with a BIOS and embedded systems
> with a plain bootloader that ignores PCI. On an ARM64 server system with
> UEFI you should expect the device to be usable too, but on an embedded
> system, Linux takes the role of the BIOS.
>
Thanks Arnd Bergmann



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