[PATCH V3 19/21] pci, acpi: Support for ACPI based generic PCI host controller init

[Tomasz Nowicki]

On 15.01.2016 10:57, Hanjun Guo wrote:
> Hi Tomasz,
>
> On 2016/1/13 21:21, Tomasz Nowicki wrote:
>> Because of two patch series:
>> 1. Jiang Liu's common interface to support PCI host controller init
>> 2. MMCONFIG refactoring (part of this patch set)
>> now we can think about generic ACPI based PCI host controller init
>> implementation out of arch/ directory.
>>
>> These calls use information from MCFG table (PCI config space regions)
>> and _CRS method (IO/irq resources) to initialize PCI hostbridge.
>>
>> TBD: We are still not sure whether we should reassign resources
>> after PCI bus enumeration or trust firmware to do all that work for
>> us properly.
>>
>> Signed-off-by: Tomasz Nowicki <tn at semihalf.com>
>> Signed-off-by: Hanjun Guo <hanjun.guo at linaro.org>
>> Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit at amd.com>
>> CC: Arnd Bergmann <arnd at arndb.de>
>> CC: Catalin Marinas <catalin.marinas at arm.com>
>> CC: Liviu Dudau <Liviu.Dudau at arm.com>
>> CC: Lorenzo Pieralisi <Lorenzo.Pieralisi at arm.com>
>> CC: Will Deacon <will.deacon at arm.com>
>> Tested-by: Suravee Suthikulpanit <Suravee.Suthikulpanit at amd.com>
>> Tested-by: Jeremy Linton <jeremy.linton at arm.com>
>> ---
>>   drivers/acpi/Kconfig    |   5 ++
>>   drivers/acpi/pci_root.c | 131
>> ++++++++++++++++++++++++++++++++++++++++++++++++
>>   2 files changed, 136 insertions(+)
>>
>> diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
>> index c3664be..e315061 100644
>> --- a/drivers/acpi/Kconfig
>> +++ b/drivers/acpi/Kconfig
>> @@ -335,6 +335,11 @@ config ACPI_PCI_SLOT
>>         i.e., segment/bus/device/function tuples, with physical slots in
>>         the system.  If you are unsure, say N.
>>
>> +config ACPI_PCI_HOST_GENERIC
>> +    bool "Generic ACPI PCI host controller"
>> +    help
>> +      Say Y here if you want to support generic ACPI PCI host
>> controller.
>
> Since x86 and IA64 will not use ACPI_PCI_HOST_GENERIC in this
> patch, it should be defined as
>
> config ACPI_PCI_HOST_GENERIC
>      bool
>
> and select for ARCHs, or will default y on x86 and IA64 too.

Right, I will fix that in v4.

>
> Compiling the kernel on a IA64 machine, will send out the
> result when it's ready.
>

Thanks,
Tomasz