aa48b6f708
genirq/MSI: Move alloc_msi_entry() from PCI into generic MSI code
...
Move alloc_msi_entry() from PCI MSI code into generic MSI code, so it
can be reused by other generic MSI drivers. Also introduce
free_msi_entry() for completeness.
Suggested-by: Stuart Yoder <stuart.yoder@freescale.com >.
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com >
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com >
Reviewed-by: Yijing Wang <wangyijing@huawei.com >
Acked-by: Bjorn Helgaas <bhelgaas@google.com >
Cc: Tony Luck <tony.luck@intel.com >
Cc: linux-arm-kernel@lists.infradead.org
Cc: Grant Likely <grant.likely@linaro.org >
Cc: Borislav Petkov <bp@alien8.de >
Cc: Alexander Gordeev <agordeev@redhat.com >
Link: http://lkml.kernel.org/r/1436428847-8886-13-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de >
2015-07-22 18:37:44 +02:00
a8a98eac7b
genirq: Remove the irq argument from setup_affinity()
...
Unused except for the alpha wrapper, which can retrieve if from the
irq descriptor.
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com >
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com >
Cc: Tony Luck <tony.luck@intel.com >
Cc: Bjorn Helgaas <bhelgaas@google.com >
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org >
Cc: Randy Dunlap <rdunlap@infradead.org >
Cc: Yinghai Lu <yinghai@kernel.org >
Cc: Borislav Petkov <bp@alien8.de >
Link: http://lkml.kernel.org/r/1433391238-19471-21-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de >
2015-07-11 23:14:25 +02:00
e019c249a6
genirq: Provide and use __irq_can_set_affinity()
...
Provide a irq_desc based variant of irq_can_set_affinity() to avoid a
redundant lookup for the core code users.
[ tglx: Split out from combo patch ]
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com >
Signed-off-by: Thomas Gleixner <tglx@linutronix.de >
2015-07-11 23:14:25 +02:00
0dcdbc9755
genirq: Remove the irq argument from note_interrupt()
...
Only required for the slow path. Retrieve it from irq descriptor if
necessary.
[ tglx: Split out from combo patch. Left [try_]misrouted_irq()
untouched as there is no win in the slow path ]
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com >
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com >
Cc: Tony Luck <tony.luck@intel.com >
Cc: Bjorn Helgaas <bhelgaas@google.com >
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org >
Cc: Randy Dunlap <rdunlap@infradead.org >
Cc: Yinghai Lu <yinghai@kernel.org >
Cc: Borislav Petkov <bp@alien8.de >
Cc: Jason Cooper <jason@lakedaemon.net >
Cc: Kevin Cernekee <cernekee@gmail.com >
Cc: Arnd Bergmann <arnd@arndb.de >
Link: http://lkml.kernel.org/r/1433391238-19471-19-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de >
2015-07-11 23:14:25 +02:00
c1e5bd8cc5
genirq: Remove irq argument from try_one_irq()
...
Unused argument.
[ tglx: Split out from combo patch ]
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com >
Signed-off-by: Thomas Gleixner <tglx@linutronix.de >
2015-07-11 23:14:24 +02:00
02d00eaa64
genirq: Remove irq argument from report_bad_irq()
...
Not really a hotpath, so __report_bad_irq() can retrieve the irq
number from the irq descriptor.
[ tglx: Split out from combo patch ]
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com >
Signed-off-by: Thomas Gleixner <tglx@linutronix.de >
2015-07-11 23:14:24 +02:00
b80f5f3fc0
genirq: Remove irq argument from suspend/resume_irq()
...
Unused argument in both functions.
[ tglx: Split out from combo patch ]
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com >
Signed-off-by: Thomas Gleixner <tglx@linutronix.de >
2015-07-11 23:14:24 +02:00
79ff1cda32
genirq: Remove irq argument from __enable/__disable_irq()
...
Solely used for debug output. Can be retrieved from irq descriptor if
necessary.
[ tglx: Split out from combo patch ]
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com >
Signed-off-by: Thomas Gleixner <tglx@linutronix.de >
2015-07-11 23:14:24 +02:00
a1ff541a40
genirq: Remove irq arg from __irq_set_trigger()
...
It's only required for debug output and can be retrieved from the irq
descriptor if necessary.
[ tglx: Split out from combo patch ]
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com >
Signed-off-by: Thomas Gleixner <tglx@linutronix.de >
2015-07-11 23:14:24 +02:00
0798abeb7e
genirq: Remove the irq argument from check_irq_resend()
...
It's only used in the software resend case and can be retrieved from
irq_desc if necessary.
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com >
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com >
Cc: Tony Luck <tony.luck@intel.com >
Cc: Bjorn Helgaas <bhelgaas@google.com >
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org >
Cc: Randy Dunlap <rdunlap@infradead.org >
Cc: Yinghai Lu <yinghai@kernel.org >
Cc: Borislav Petkov <bp@alien8.de >
Link: http://lkml.kernel.org/r/1433391238-19471-18-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de >
2015-07-11 23:14:24 +02:00
b51bf95c58
genirq: Remove the parameter 'irq' of kstat_incr_irqs_this_cpu()
...
The first parameter 'irq' is never used by
kstat_incr_irqs_this_cpu(). Remove it.
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com >
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com >
Cc: Tony Luck <tony.luck@intel.com >
Cc: Bjorn Helgaas <bhelgaas@google.com >
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org >
Cc: Randy Dunlap <rdunlap@infradead.org >
Cc: Yinghai Lu <yinghai@kernel.org >
Cc: Borislav Petkov <bp@alien8.de >
Link: http://lkml.kernel.org/r/1433391238-19471-16-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de >
2015-07-11 23:14:24 +02:00
f05218651b
Merge branch 'irq/for-x86' into irq/core
...
Get the infrastructure patches which are required for x86/apic into core
2015-06-20 19:14:31 +02:00
a614a610ac
genirq: Remove bogus restriction in irq_move_mask_irq()
...
If an interrupt is marked with the no balancing flag, we still allow
setting the affinity for such an interrupt from the kernel itself, but
for interrupts which move the affinity from interrupt context via
irq_move_mask_irq() this runs into a check for the no balancing flag,
which in turn ends up with an endless storm of stack dumps because the
move pending flag is not reset.
Allow the move for interrupts which have the no balancing flag set and
clear the move pending bit before checking for interrupts with the per
cpu flag set.
Reported-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com >
Cc: Borislav Petkov <bp@alien8.de >
Cc: Jiang Liu <jiang.liu@linux.intel.com >
Link: http://lkml.kernel.org/r/alpine.DEB.2.11.1506201002570.4107@nanos
Signed-off-by: Thomas Gleixner <tglx@linutronix.de >
2015-06-20 19:05:14 +02:00
3b0f95be14
irq: Add irq_set_chained_handler_and_data()
...
Driver authors seem to get the ordering of irq_set_chained_handler()
and irq_set_handler_data() wrong - ordering the former before the
latter. This opens a race window where, if there is an interrupt
pending, the handler will be called between these two calls,
potentially resulting in an oops.
Provide a single interface to set both of these together, especially
as that's commonly what is required.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk >
Cc: Alexandre Courbot <gnurou@gmail.com >
Cc: Hans Ulli Kroll <ulli.kroll@googlemail.com >
Cc: Jason Cooper <jason@lakedaemon.net >
Cc: Lee Jones <lee.jones@linaro.org >
Cc: Linus Walleij <linus.walleij@linaro.org >
Cc: Thierry Reding <thierry.reding@gmail.com >
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/E1Z4yzs-0002Rw-4B@rmk-PC.arm.linux.org.uk
Signed-off-by: Thomas Gleixner <tglx@linutronix.de >
2015-06-18 14:03:08 +02:00
6783011b48
genirq: Introduce helper function irq_data_get_node()
...
Introduce helper function irq_data_get_node() and variants thereof to
hide struct irq_data implementation details.
Convert the core code to use them.
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com >
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com >
Cc: Tony Luck <tony.luck@intel.com >
Cc: Bjorn Helgaas <bhelgaas@google.com >
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org >
Cc: Randy Dunlap <rdunlap@infradead.org >
Cc: Yinghai Lu <yinghai@kernel.org >
Cc: Borislav Petkov <bp@alien8.de >
Cc: Jason Cooper <jason@lakedaemon.net >
Cc: Kevin Cernekee <cernekee@gmail.com >
Cc: Arnd Bergmann <arnd@arndb.de >
Link: http://lkml.kernel.org/r/1433145945-789-5-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de >
2015-06-12 16:54:21 +02:00
0d0b4c866b
genirq: Introduce struct irq_common_data to host shared irq data
...
With the introduction of hierarchy irqdomain, struct irq_data becomes
per-chip instead of per-irq and there may be multiple irq_datas
associated with the same irq. Some per-irq data stored in struct
irq_data now may get duplicated into multiple irq_datas, and causes
inconsistent view.
So introduce struct irq_common_data to host per-irq common data and to
achieve consistent view among irq_chips.
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com >
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com >
Cc: Tony Luck <tony.luck@intel.com >
Cc: Bjorn Helgaas <bhelgaas@google.com >
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org >
Cc: Randy Dunlap <rdunlap@infradead.org >
Cc: Yinghai Lu <yinghai@kernel.org >
Cc: Borislav Petkov <bp@alien8.de >
Cc: Jason Cooper <jason@lakedaemon.net >
Cc: Kevin Cernekee <cernekee@gmail.com >
Cc: Arnd Bergmann <arnd@arndb.de >
Cc: Marc Zyngier <marc.zyngier@arm.com >
Link: http://lkml.kernel.org/r/1433145945-789-4-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de >
2015-06-12 16:54:21 +02:00
77ed42f18e
genirq: Prevent crash in irq_move_irq()
...
The functions irq_move_irq() and irq_move_masked_irq() expect that the
caller passes the top-level irq_data to them when hierarchical
irqdomains are enabled. But that's not true when called from
apic_ack_edge(), which results in a null pointer dereference by
idata->chip->irq_mask(idata).
Instead of fixing callers to passing top-level irq_data, we rather
change irq_move_irq()/irq_move_masked_irq() to accept any irq_data.
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com >
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com >
Cc: Tony Luck <tony.luck@intel.com >
Cc: Bjorn Helgaas <bhelgaas@google.com >
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org >
Cc: Randy Dunlap <rdunlap@infradead.org >
Cc: Yinghai Lu <yinghai@kernel.org >
Cc: Borislav Petkov <bp@alien8.de >
Link: http://lkml.kernel.org/r/1433145945-789-3-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de >
2015-06-12 16:54:21 +02:00
7bbf1dd24b
genirq: Enhance irq_data_to_desc() to support hierarchy irqdomain
...
For irq associated with hierarchy irqdomains, there will be multiple
irq_datas for one irq_desc. So enhance irq_data_to_desc() to support
hierarchy irqdomain. Also export irq_data_to_desc() as an inline
function for later reuse.
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com >
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com >
Cc: Tony Luck <tony.luck@intel.com >
Cc: Bjorn Helgaas <bhelgaas@google.com >
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org >
Cc: Randy Dunlap <rdunlap@infradead.org >
Cc: Yinghai Lu <yinghai@kernel.org >
Cc: Borislav Petkov <bp@alien8.de >
Cc: Marc Zyngier <marc.zyngier@arm.com >
Link: http://lkml.kernel.org/r/1433145945-789-2-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de >
2015-06-12 16:54:21 +02:00
9f61f62544
Merge branch 'linus' into irq/core
...
Get the urgent fixes from upstream to avoid conflicts.
2015-06-05 22:25:01 +02:00
de8d1810fd
genirq: Set IRQCHIP_SKIP_SET_WAKE for no_irq_chip
...
If no_irq_chip is used for wake up (e.g. gpio-keys with a simple GPIO
controller), the following warning is printed on resume from s2ram:
WANING: CPU: 0 PID: 1046 at kernel/irq/manage.c:537 irq_set_irq_wake+0x9c/0xf8()
Unbalanced IRQ 113 wake disable
This happens because no_irq_chip does not implement
irq_chip.irq_set_wake(), causing set_irq_wake_real() to return -ENXIO,
and irq_set_irq_wake() to reset the wake_depth to zero.
Set IRQCHIP_SKIP_SET_WAKE to indicate that irq_chip.irq_set_wake() is
not implemented.
Cfr. commit 10a50f1ab5geert+renesas@glider.be >
Cc: Roger Quadros <rogerq@ti.com >
Cc: Gregory Clement <gregory.clement@free-electrons.com >
Link: http://lkml.kernel.org/r/1432281529-23325-1-git-send-email-geert%2Brenesas@glider.be
Signed-off-by: Thomas Gleixner <tglx@linutronix.de >
2015-05-22 11:06:47 +02:00
a6c761e44c
Merge branch 'irq/for-x86' into irq/core
...
Pull in the branch which can be consumed by x86 to build their changes
on top.
2015-05-19 15:41:30 +02:00
0a4377de30
genirq: Introduce irq_set_vcpu_affinity() to target an interrupt to a VCPU
...
With Posted-Interrupts support in Intel CPU and IOMMU, an external
interrupt from assigned-devices could be directly delivered to a
virtual CPU in a virtual machine. Instead of hacking KVM and Intel
IOMMU drivers, we propose a platform independent interface to target
an interrupt to a specific virtual CPU in a virtual machine, or set
virtual CPU affinity for an interrupt.
By adopting this new interface and the hierarchy irqdomain, we could
easily support posted-interrupts on Intel platforms, and also provide
flexible enough interfaces for other platforms to support similar
features.
Here is the usage scenario for this interface:
Guest update MSI/MSI-X interrupt configuration
-->QEMU and KVM handle this
-->KVM call this interface (passing posted interrupts descriptor
and guest vector)
-->irq core will transfer the control to IOMMU
-->IOMMU will do the real work of updating IRTE (IRTE has new
format for VT-d Posted-Interrupts)
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com >
Signed-off-by: Feng Wu <feng.wu@intel.com >
Link: http://lkml.kernel.org/r/1432026437-16560-2-git-send-email-feng.wu@intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de >
2015-05-19 15:41:19 +02:00
939ef66848
Merge branch 'irq/for-arm' into irq/core
...
Pull in the branch which can be consumed by ARM to build their changes
on top.
2015-05-18 23:59:33 +02:00
c5863484c1
genirq: generic chip: Support hierarchy domain
...
Use the new helper function irq_domain_set_info to make sure the
function irq_domain_set_hwirq_and_chip is being called, which is
crucial to save irqdomain specific data to irq_data.
Signed-off-by: Stefan Agner <stefan@agner.ch >
Cc: marc.zyngier@arm.com
Cc: linux@arm.linux.org.uk
Cc: u.kleine-koenig@pengutronix.de
Cc: olof@lixom.net
Cc: arnd@arndb.de
Cc: daniel.lezcano@linaro.org
Cc: mark.rutland@arm.com
Cc: pawel.moll@arm.com
Cc: robh+dt@kernel.org
Cc: ijc+devicetree@hellion.org.uk
Cc: galak@codeaurora.org
Cc: mcoquelin.stm32@gmail.com
Cc: linux-arm-kernel@lists.infradead.org
Cc: shawn.guo@linaro.org
Cc: kernel@pengutronix.de
Cc: jason@lakedaemon.net
Link: http://lkml.kernel.org/r/1431769465-26867-4-git-send-email-stefan@agner.ch
Signed-off-by: Thomas Gleixner <tglx@linutronix.de >
2015-05-18 17:32:44 +02:00
3cfeffc265
genirq: Add irq_chip_(enable/disable)_parent
...
Add helper irq_chip_enable_parent and irq_chip_disable_parent. The
helper implement the default behavior in case irq_enable or irq_disable
is not implemented for the parent interrupt chip, which is calling the
irq_mask or irq_unmask respectively.
Signed-off-by: Stefan Agner <stefan@agner.ch >
Cc: marc.zyngier@arm.com
Cc: linux@arm.linux.org.uk
Cc: u.kleine-koenig@pengutronix.de
Cc: olof@lixom.net
Cc: arnd@arndb.de
Cc: daniel.lezcano@linaro.org
Cc: mark.rutland@arm.com
Cc: pawel.moll@arm.com
Cc: robh+dt@kernel.org
Cc: ijc+devicetree@hellion.org.uk
Cc: galak@codeaurora.org
Cc: mcoquelin.stm32@gmail.com
Cc: linux-arm-kernel@lists.infradead.org
Cc: shawn.guo@linaro.org
Cc: kernel@pengutronix.de
Cc: jason@lakedaemon.net
Link: http://lkml.kernel.org/r/1431769465-26867-3-git-send-email-stefan@agner.ch
Signed-off-by: Thomas Gleixner <tglx@linutronix.de >
2015-05-18 17:32:44 +02:00
Jiang Liu
Thomas Gleixner
Russell King
Geert Uytterhoeven
Stefan Agner