Re: [PATCH V3 00/21] MMCONFIG refactoring and support for ARM64 PCI hostbridge init based on ACPI

[Sinan Kaya]

On 1/14/2016 10:29 AM, Mark Salter wrote:
On Wed, 2016-01-13 at 14:20 +0100, Tomasz Nowicki wrote:
> IO resources on Mustang get disabled unless I do:
> 
> @@ -126,9 +126,10 @@ static void acpi_dev_ioresource_flags(struct
> resource *res, u64 len, if (!acpi_dev_resource_len_valid(res->start,
> res->end, len, true)) res->flags |= IORESOURCE_DISABLED |
> IORESOURCE_UNSET;
> 
> +#if 0 if (res->end >= 0x10003) res->flags |= IORESOURCE_DISABLED |
> IORESOURCE_UNSET; - +#endif
> 
> res->end is way beyond 0x10003 on Mustang:
> 
> pci_bus 0000:00: root bus resource [io  0x0000-0xffff window] (bus
> address [0x10000000-0x1000ffff])
> 
> 

Join the club. I complained about this and I got the message that we just do what Intel does. 
See Arnd Bergmann's reply.

[PATCH V2 00/23] MMCONFIG refactoring and support for ARM64 PCI hostbridge init based on ACPI

1/12/2016 9:30 AM

It is an artificial limit coming from the x86 world introduced into common code.

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-- 
Sinan Kaya
Qualcomm Technologies, Inc. on behalf of Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project