linux/arch
Marc Zyngier ad3aedfbb0 genirq/irqdomain: Allow irq domain aliasing
It is not uncommon (at least with the ARM stuff) to have a piece
of hardware that implements different flavours of "interrupts".
A typical example of this is the GICv3 ITS, which implements
standard PCI/MSI support, but also some form of "generic MSI".

So far, the PCI/MSI domain is registered using the ITS device_node,
so that irq_find_host can return it. On the contrary, the raw MSI
domain is not registered with an device_node, making it impossible
to be looked up by another subsystem (obviously, using the same
device_node twice would only result in confusion, as it is not
defined which one irq_find_host would return).

A solution to this is to "type" domains that may be aliasing, and
to be able to lookup an device_node that matches a given type.
For this, we introduce irq_find_matching_host() as a superset
of irq_find_host:

struct irq_domain *irq_find_matching_host(struct device_node *node,
                                enum irq_domain_bus_token bus_token);

where bus_token is the "type" we want to match the domain against
(so far, only DOMAIN_BUS_ANY is defined). This result in some
moderately invasive changes on the PPC side (which is the only
user of the .match method).

This has otherwise no functionnal change.

Reviewed-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: <linux-arm-kernel@lists.infradead.org>
Cc: Yijing Wang <wangyijing@huawei.com>
Cc: Ma Jun <majun258@huawei.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Duc Dang <dhdang@apm.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Jiang Liu <jiang.liu@linux.intel.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Link: http://lkml.kernel.org/r/1438091186-10244-2-git-send-email-marc.zyngier@arm.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-07-30 00:14:36 +02:00
..
alpha Merge branch 'linus' into irq/core 2015-07-30 00:13:24 +02:00
arc mm: clean up per architecture MM hook header files 2015-07-17 16:39:53 -07:00
arm Merge branch 'linus' into irq/core 2015-07-30 00:13:24 +02:00
arm64 ARM64/irq: Use access helper irq_data_get_affinity_mask() 2015-07-22 10:57:09 +01:00
avr32 Merge branch 'linus' into irq/core 2015-07-30 00:13:24 +02:00
blackfin Merge branch 'linus' into irq/core 2015-07-30 00:13:24 +02:00
c6x Merge branch 'linus' into irq/core 2015-07-30 00:13:24 +02:00
cris mm: clean up per architecture MM hook header files 2015-07-17 16:39:53 -07:00
frv mm: clean up per architecture MM hook header files 2015-07-17 16:39:53 -07:00
h8300 mm: clean up per architecture MM hook header files 2015-07-17 16:39:53 -07:00
hexagon mm: clean up per architecture MM hook header files 2015-07-17 16:39:53 -07:00
ia64 Merge branch 'linus' into irq/core 2015-07-30 00:13:24 +02:00
m32r m32r: Add ioreadXX/iowriteXX big-endian mmio accessors 2015-07-23 18:08:28 -07:00
m68k mm: clean up per architecture MM hook header files 2015-07-17 16:39:53 -07:00
metag mm: clean up per architecture MM hook header files 2015-07-17 16:39:53 -07:00
microblaze mm: clean up per architecture MM hook header files 2015-07-17 16:39:53 -07:00
mips Merge branch 'linus' into irq/core 2015-07-30 00:13:24 +02:00
mn10300 mm: clean up per architecture MM hook header files 2015-07-17 16:39:53 -07:00
nios2 mm: clean up per architecture MM hook header files 2015-07-17 16:39:53 -07:00
openrisc mm: clean up per architecture MM hook header files 2015-07-17 16:39:53 -07:00
parisc parisc: mm: Fix a memory leak related to pmd not attached to the pgd 2015-07-19 08:56:14 +02:00
powerpc genirq/irqdomain: Allow irq domain aliasing 2015-07-30 00:14:36 +02:00
s390 Merge branch 'linus' into irq/core 2015-07-30 00:13:24 +02:00
score mm: clean up per architecture MM hook header files 2015-07-17 16:39:53 -07:00
sh Merge branch 'linus' into irq/core 2015-07-30 00:13:24 +02:00
sparc Merge branch 'linus' into irq/core 2015-07-30 00:13:24 +02:00
tile Merge branch 'linus' into irq/core 2015-07-30 00:13:24 +02:00
um mm: clean up per architecture MM hook header files 2015-07-17 16:39:53 -07:00
unicore32 mm: clean up per architecture MM hook header files 2015-07-17 16:39:53 -07:00
x86 Merge branch 'linus' into irq/core 2015-07-30 00:13:24 +02:00
xtensa Merge branch 'linus' into irq/core 2015-07-30 00:13:24 +02:00
.gitignore
Kconfig x86/fpu, sched: Introduce CONFIG_ARCH_WANTS_DYNAMIC_TASK_STRUCT and use it on x86 2015-07-18 03:42:51 +02:00