[PATCH V3 19/21] pci, acpi: Support for ACPI based generic PCI host controller init
tn at semihalf.com
Mon Jan 18 01:57:41 PST 2016
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
> Since x86 and IA64 will not use ACPI_PCI_HOST_GENERIC in this
> patch, it should be defined as
> config ACPI_PCI_HOST_GENERIC
> 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.
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