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| author | Thomas Gleixner <tglx@linutronix.de> | 2014-05-07 17:44:05 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2014-05-16 14:05:18 +0200 |
| commit | 7b6ef1262549f6afc5c881aaef80beb8fd15f908 (patch) | |
| tree | c773a3d7dc6fcaa5aa9ba35074312f728d7dce40 /kernel/irq/Kconfig | |
| parent | mips: Kill pointless destroy_irq() (diff) | |
| download | linux-7b6ef1262549f6afc5c881aaef80beb8fd15f908.tar.xz linux-7b6ef1262549f6afc5c881aaef80beb8fd15f908.zip | |
genirq: Provide generic hwirq allocation facility
Not really the solution to the problem, but at least it confines the
mess in the core code and allows to get rid of the create/destroy_irq
variants from hell, i.e. 3 implementations with different semantics
plus the x86 specific variants __create_irqs and create_irq_nr
which have been invented in another circle of hell.
x86 : x86 should be converted to irq domains and I'm deliberately
making it impossible to do the multi-vector MSI support by
adding more crap to the current mess. It's not that hard to do
and I'm really tired of the trainwrecks which have been invented
by baindaid engineering so far. Any attempt to do multi-vector
MSI or ioapic hotplug without converting to irq domains is NAKed
hereby.
tile: Might use irq domains as well, but it has a very limited
interrupt space, so handling it via this functionality might be
the right thing to do even in the long run.
ia64: That's an hopeless case, as I doubt that anyone has the stomach
to rewrite the homebrewn dynamic allocation facilities. I stared
at it for a couple of hours and gave up. The create/destroy_irq
mess could be made private to itanic right away if there
wouldn't be the iommu/dmar driver being shared with x86. So to
do that I'm going to add a separate ia64 specific implementation
later in order not to deep-six itanic right away.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Grant Likely <grant.likely@linaro.org>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: x86@kernel.org
Link: http://lkml.kernel.org/r/20140507154334.208629358@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/irq/Kconfig')
| -rw-r--r-- | kernel/irq/Kconfig | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/kernel/irq/Kconfig b/kernel/irq/Kconfig index 07cbdfea9ae2..a83f10e406c1 100644 --- a/kernel/irq/Kconfig +++ b/kernel/irq/Kconfig @@ -17,6 +17,11 @@ config GENERIC_IRQ_SHOW config GENERIC_IRQ_SHOW_LEVEL bool +# Facility to allocate a hardware interrupt. This is legacy support +# and should not be used in new code. Use irq domains instead. +config GENERIC_IRQ_LEGACY_ALLOC_HWIRQ + bool + # Support for delayed migration from interrupt context config GENERIC_PENDING_IRQ bool |