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2017-01-12irqchip/bcm7038-l1: Implement irq_cpu_offline() callbackFlorian Fainelli1-0/+26
commit 34c535793bcbf9263cf22f8a52101f796cdfab8e upstream. We did not implement an irq_cpu_offline callback for our irqchip, yet we support setting a given IRQ's affinity. This resulted in interrupts whose affinity mask included CPUs being taken offline not to work correctly once the CPU had been put offline. Fixes: 5f7f0317ed28 ("IRQCHIP: Add new driver for BCM7038-style level 1 interrupt controllers") Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Cc: linux-mips@linux-mips.org Cc: jason@lakedaemon.net Cc: marc.zyngier@arm.com Cc: cernekee@gmail.com Cc: jaedon.shin@gmail.com Cc: ralf@linux-mips.org Cc: justinpopo6@gmail.com Link: http://lkml.kernel.org/r/1477948656-12966-2-git-send-email-f.fainelli@gmail.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-10-28irqchip/gicv3: Handle loop timeout properDan Carpenter1-1/+1
commit d102eb5c1ac5e6743b1c6d145c06a25d98ad1375 upstream. The timeout loop terminates when the loop count is zero, but the decrement of the count variable is post check. So count is -1 when we check for the timeout and therefor the error message is supressed. Change it to predecrement, so the error message is emitted. [ tglx: Massaged changelog ] Fixes: a2c225101234 ("irqchip: gic-v3: Refactor gic_enable_redist to support both enabling and disabling") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Sudeep Holla <sudeep.holla@arm.com> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: kernel-janitors@vger.kernel.org Cc: Jason Cooper <jason@lakedaemon.net> Link: http://lkml.kernel.org/r/20161014072534.GA15168@mwanda Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-10-07irqchip/gicv3: Silence noisy DEBUG_PER_CPU_MAPS warningJames Morse1-3/+4
commit 727653d6ce7103b245eb8041f55dd5885f4c3289 upstream. gic_raise_softirq() walks the list of cpus using for_each_cpu(), it calls gic_compute_target_list() which advances the iterator by the number of CPUs in the cluster. If gic_compute_target_list() reaches the last CPU it leaves the iterator pointing at the last CPU. This means the next time round the for_each_cpu() loop cpumask_next() will be called with an invalid CPU. This triggers a warning when built with CONFIG_DEBUG_PER_CPU_MAPS: [ 3.077738] GICv3: CPU1: found redistributor 1 region 0:0x000000002f120000 [ 3.077943] CPU1: Booted secondary processor [410fd0f0] [ 3.078542] ------------[ cut here ]------------ [ 3.078746] WARNING: CPU: 1 PID: 0 at ../include/linux/cpumask.h:121 gic_raise_softirq+0x12c/0x170 [ 3.078812] Modules linked in: [ 3.078869] [ 3.078930] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.8.0-rc5+ #5188 [ 3.078994] Hardware name: Foundation-v8A (DT) [ 3.079059] task: ffff80087a1a0080 task.stack: ffff80087a19c000 [ 3.079145] PC is at gic_raise_softirq+0x12c/0x170 [ 3.079226] LR is at gic_raise_softirq+0xa4/0x170 [ 3.079296] pc : [<ffff0000083ead24>] lr : [<ffff0000083eac9c>] pstate: 200001c9 [ 3.081139] Call trace: [ 3.081202] Exception stack(0xffff80087a19fbe0 to 0xffff80087a19fd10) [ 3.082269] [<ffff0000083ead24>] gic_raise_softirq+0x12c/0x170 [ 3.082354] [<ffff00000808e614>] smp_send_reschedule+0x34/0x40 [ 3.082433] [<ffff0000080e80a0>] resched_curr+0x50/0x88 [ 3.082512] [<ffff0000080e89d0>] check_preempt_curr+0x60/0xd0 [ 3.082593] [<ffff0000080e8a60>] ttwu_do_wakeup+0x20/0xe8 [ 3.082672] [<ffff0000080e8bb8>] ttwu_do_activate+0x90/0xc0 [ 3.082753] [<ffff0000080ea9a4>] try_to_wake_up+0x224/0x370 [ 3.082836] [<ffff0000080eabc8>] default_wake_function+0x10/0x18 [ 3.082920] [<ffff000008103134>] __wake_up_common+0x5c/0xa0 [ 3.083003] [<ffff0000081031f4>] __wake_up_locked+0x14/0x20 [ 3.083086] [<ffff000008103f80>] complete+0x40/0x60 [ 3.083168] [<ffff00000808df7c>] secondary_start_kernel+0x15c/0x1d0 [ 3.083240] [<00000000808911a4>] 0x808911a4 [ 3.113401] Detected PIPT I-cache on CPU2 Avoid updating the iterator if the next call to cpumask_next() would cause the for_each_cpu() loop to exit. There is no change to gic_raise_softirq()'s behaviour, (cpumask_next()s eventual call to _find_next_bit() will return early as start >= nbits), this patch just silences the warning. Fixes: 021f653791ad ("irqchip: gic-v3: Initial support for GICv3") Signed-off-by: James Morse <james.morse@arm.com> Acked-by: Marc Zyngier <marc.zyngier@arm.com> Cc: linux-arm-kernel@lists.infradead.org Cc: Jason Cooper <jason@lakedaemon.net> Link: http://lkml.kernel.org/r/1474306155-3303-1-git-send-email-james.morse@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-09-24irqchip/atmel-aic: Fix potential deadlock in ->xlate()Boris Brezillon2-4/+6
commit 5eb0d6eb3fac3daa60d9190eed9fa41cf809c756 upstream. aic5_irq_domain_xlate() and aic_irq_domain_xlate() take the generic chip lock without disabling interrupts, which can lead to a deadlock if an interrupt occurs while the lock is held in one of these functions. Replace irq_gc_{lock,unlock}() calls by irq_gc_{lock_irqsave,unlock_irqrestore}() ones to prevent this bug from happening. Fixes: b1479ebb7720 ("irqchip: atmel-aic: Add atmel AIC/AIC5 drivers") Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Acked-by: Marc Zyngier <marc.zyngier@arm.com> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Nicolas Ferre <nicolas.ferre@atmel.com> Cc: Alexandre Belloni <alexandre.belloni@free-electrons.com> Link: http://lkml.kernel.org/r/1473775109-4192-2-git-send-email-boris.brezillon@free-electrons.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-09-15irqchip/gicv3-its: numa: Enable workaround for Cavium thunderx erratum 23144Ganapatrao Kulkarni1-2/+47
[ Upstream commit fbf8f40e1658cb2f17452dbd3c708e329c5d27e0 ] The erratum fixes the hang of ITS SYNC command by avoiding inter node io and collections/cpu mapping on thunderx dual-socket platform. This fix is only applicable for Cavium's ThunderX dual-socket platform. Reviewed-by: Robert Richter <rrichter@cavium.com> Signed-off-by: Ganapatrao Kulkarni <gkulkarni@caviumnetworks.com> Signed-off-by: Robert Richter <rrichter@cavium.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Sasha Levin <alexander.levin@verizon.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-06-01irqchip/gic-v3: Configure all interrupts as non-secure Group-1Marc Zyngier1-0/+12
commit 7c9b973061b03af62734f613f6abec46c0dd4a88 upstream. The GICv3 driver wrongly assumes that it runs on the non-secure side of a secure-enabled system, while it could be on a system with a single security state, or a GICv3 with GICD_CTLR.DS set. Either way, it is important to configure this properly, or interrupts will simply not be delivered on this HW. Reported-by: Peter Maydell <peter.maydell@linaro.org> Tested-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-06-01irqchip/gic: Ensure ordering between read of INTACK and shared dataWill Deacon2-0/+15
commit f86c4fbd930ff6fecf3d8a1c313182bd0f49f496 upstream. When an IPI is generated by a CPU, the pattern looks roughly like: <write shared data> smp_wmb(); <write to GIC to signal SGI> On the receiving CPU we rely on the fact that, once we've taken the interrupt, then the freshly written shared data must be visible to us. Put another way, the CPU isn't going to speculate taking an interrupt. Unfortunately, this assumption turns out to be broken. Consider that CPUx wants to send an IPI to CPUy, which will cause CPUy to read some shared_data. Before CPUx has done anything, a random peripheral raises an IRQ to the GIC and the IRQ line on CPUy is raised. CPUy then takes the IRQ and starts executing the entry code, heading towards gic_handle_irq. Furthermore, let's assume that a bunch of the previous interrupts handled by CPUy were SGIs, so the branch predictor kicks in and speculates that irqnr will be <16 and we're likely to head into handle_IPI. The prefetcher then grabs a speculative copy of shared_data which contains a stale value. Meanwhile, CPUx gets round to updating shared_data and asking the GIC to send an SGI to CPUy. Internally, the GIC decides that the SGI is more important than the peripheral interrupt (which hasn't yet been ACKed) but doesn't need to do anything to CPUy, because the IRQ line is already raised. CPUy then reads the ACK register on the GIC, sees the SGI value which confirms the branch prediction and we end up with a stale shared_data value. This patch fixes the problem by adding an smp_rmb() to the IPI entry code in gic_handle_irq. As it turns out, the combination of a control dependency and an ISB instruction from the EOI in the GICv3 driver is enough to provide the ordering we need, so we add a comment there justifying the absence of an explicit smp_rmb(). Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-05-05irqchip/mxs: Fix error check of of_io_request_and_map()Vladimir Zapolskiy1-1/+1
commit edf8fcdc6b254236be005851af35ea5e826e7e09 upstream. The of_io_request_and_map() returns a valid pointer in iomem region or ERR_PTR(), check for NULL always fails and may cause a NULL pointer dereference on error path. Fixes: 25e34b44313b ("irqchip/mxs: Prepare driver for hardware with different offsets") Signed-off-by: Vladimir Zapolskiy <vz@mleia.com> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Oleksij Rempel <linux@rempel-privat.de> Cc: Sascha Hauer <kernel@pengutronix.de> Cc: Shawn Guo <shawnguo@kernel.org> Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1457486500-10237-1-git-send-email-vz@mleia.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-05-05irqchip/sunxi-nmi: Fix error check of of_io_request_and_map()Vladimir Zapolskiy1-2/+2
commit cfe199afefe6201e998ddc07102fc1fdb55f196c upstream. The of_io_request_and_map() returns a valid pointer in iomem region or ERR_PTR(), check for NULL always fails and may cause a NULL pointer dereference on error path. Fixes: 0e841b04c829 ("irqchip/sunxi-nmi: Switch to of_io_request_and_map() from of_iomap()") Signed-off-by: Vladimir Zapolskiy <vz@mleia.com> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Chen-Yu Tsai <wens@csie.org> Cc: Maxime Ripard <maxime.ripard@free-electrons.com> Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1457486489-10189-1-git-send-email-vz@mleia.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-03-04irqchip/gic-v3-its: Fix double ICC_EOIR write for LPI in EOImode==1Ashok Kumar1-6/+1
commit 004fa08d7aba2a13974446bf212a48c0b3b0d9fd upstream. When the GIC is using EOImode==1, the EOI is done immediately, leaving the deactivation to be performed when the EOI was previously done. Unfortunately, the ITS is not aware of the EOImode at all, and blindly EOIs the interrupt again. On most systems, this is ignored (despite being a programming error), but some others do raise a SError exception as there is no priority drop to perform for this interrupt. The fix is to stop trying to be clever, and always call into the underlying GIC to perform the right access, irrespective of the more we're in. [Marc: Reworked commit message] Fixes: 0b996fd35957a ("irqchip/GICv3: Convert to EOImode == 1") Acked-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Ashok Kumar <ashoks@broadcom.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-03-04irqchip/atmel-aic: Fix wrong bit operation for IRQ priorityMilo Kim1-1/+1
commit 49f34134aea74f19ca016f055d25ee55ec359dee upstream. Atmel AIC has common structure for SMR (Source Mode Register). bit[6:5] Interrupt source type bit[2:0] Priority level Other bits are unused. To update new priority value, bit[2:0] should be cleared first and then new priority level can be written. However, aic_common_set_priority() helper clears source type bits instead of priority bits. This patch fixes wrong mask bit operation. Fixes: b1479ebb7720 "irqchip: atmel-aic: Add atmel AIC/AIC5 drivers" Signed-off-by: Milo Kim <milo.kim@ti.com> Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Ludovic Desroches <ludovic.desroches@atmel.com> Cc: Nicholas Ferre <nicolas.ferre@atmel.com> Link: http://lkml.kernel.org/r/1452669592-3401-2-git-send-email-milo.kim@ti.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-03-04irqchip/mxs: Add missing set_handle_irq()Oleksij Rempel1-0/+1
commit c5b635203032462603c503ecce91a7021c1ad44a upstream. The rework of the driver missed to move the call to set_handle_irq() into asm9260_of_init(). As a consequence no interrupt entry point is installed and no interrupts are delivered Solution is simple: Install the interrupt entry handler. Fixes: 7e4ac676ee ("irqchip/mxs: Add Alphascale ASM9260 support") Signed-off-by: Oleksij Rempel <linux@rempel-privat.de> Cc: kernel@pengutronix.de Cc: jason@lakedaemon.net Cc: marc.zyngier@arm.com Link: http://lkml.kernel.org/r/1454061473-24957-1-git-send-email-linux@rempel-privat.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-03-04irqchip/omap-intc: Add support for spurious irq handlingSekhar Nori1-1/+26
commit d3b421cd07e4c0d4d6c0bbd55ca169c054fc081d upstream. Under some conditions, irq sorting procedure used by INTC can go wrong resulting in a spurious irq getting reported. If this condition is not handled, it results in endless stream of: unexpected IRQ trap at vector 00 messages from ack_bad_irq() Handle the spurious interrupt condition in omap-intc driver to prevent this. Measurements using kernel function profiler on AM335x EVM running at 720MHz show that after this patch omap_intc_handle_irq() takes about 37.4us against 34us before this patch. Signed-off-by: Sekhar Nori <nsekhar@ti.com> Acked-by: Tony Lindgren <tony@atomide.com> Cc: John Ogness <john.ogness@linutronix.de> Cc: Felipe Balbi <balbi@ti.com> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Marc Zyngier <marc.zyngier@arm.com> Link: http://lkml.kernel.org/r/9c78a6db02ac55f7af7371b417b6e414d2c3095b.1450188128.git.nsekhar@ti.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-02irqchip/versatile-fpga: Fix PCI IRQ mapping on Versatile PBGuillaume Delbergue1-0/+5
This patch is specifically for PCI support on the Versatile PB board using a DT. Currently, the dynamic IRQ mapping is broken when using DTs. For example, on QEMU, the SCSI driver is unable to request the IRQ. To fix this issue, this patch replaces the current dynamic mechanism with a static value as is done in the non-DT case. Signed-off-by: Guillaume Delbergue <guillaume.delbergue@greensocs.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: stable@vger.kernel.org
2015-11-17irqchip/gic: Add save/restore of the active stateMarc Zyngier1-0/+28
When using EOImode==1, we may mark interrupts as being forwarded to a virtual machine. In that case, the interrupt is left active while being passed to the VM. If we suspend the system before the VM has deactivated the interrupt, the active state will be lost (which may be very annoying, as this may result in spurious interrupts and a confused guest). To avoid this, save and restore the active state together with the rest of the GIC registers. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Cc: <linux-arm-kernel@lists.infradead.org> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Russell King <linux@arm.linux.org.uk> Link: http://lkml.kernel.org/r/1447701208-18150-5-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-11-17irqchip/gic: Clear enable bits before restoring themMarc Zyngier1-2/+8
When restoring the GIC state (after a suspend/resume cycle, for example), the driver directly writes the 'enabled' state it has saved by accessing GICD_ISENABLERn, which performs an OR operation between the value present in the register and the value we write. If whatever code that has run before we reentered the kernel has enabled an interrupt that was previously disabled, we won't restore that disabled state. Making sure we first clear the register (by writting to GICD_ICENABLERn) before restoring the enabled state. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Cc: <linux-arm-kernel@lists.infradead.org> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Russell King <linux@arm.linux.org.uk> Link: http://lkml.kernel.org/r/1447701208-18150-4-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-11-17irqchip/gic: Make sure all interrupts are deactivated at bootMarc Zyngier1-4/+9
When booting a GIC/GICv3 based system, we have no idea what state the firmware (or previous kernel in the case of kexec) has left the GIC, and some interrupts may still be active. In order to garantee that we have a clean state, make sure the active bits are cleared at init time. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Cc: <linux-arm-kernel@lists.infradead.org> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Russell King <linux@arm.linux.org.uk> Link: http://lkml.kernel.org/r/1447701208-18150-3-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-11-15Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linusLinus Torvalds1-0/+14
Pull MIPS updates from Ralf Baechle: "These are the highlists of the main MIPS pull request for 4.4: - Add latencytop support - Support appended DTBs - VDSO support and initially use it for gettimeofday. - Drop the .MIPS.abiflags and ELF NOTE sections from vmlinux - Support for the 5KE, an internal test core. - Switch all MIPS platfroms to libata drivers. - Improved support, cleanups for ralink and Lantiq platforms. - Support for the new xilfpga platform. - A number of DTB improvments for BMIPS. - Improved support for CM and CPS. - Minor JZ4740 and BCM47xx enhancements" * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (120 commits) MIPS: idle: add case for CPU_5KE MIPS: Octeon: Support APPENDED_DTB MIPS: vmlinux: create a section for appended DTB MIPS: Clean up compat_siginfo_t MIPS: Fix PAGE_MASK definition MIPS: BMIPS: Enable GZIP ramdisk and timed printks MIPS: Add xilfpga defconfig MIPS: xilfpga: Add mipsfpga platform code MIPS: xilfpga: Add xilfpga device tree files. dt-bindings: MIPS: Document xilfpga bindings and boot style MIPS: Make MIPS_CMDLINE_DTB default MIPS: Make the kernel arguments from dtb available MIPS: Use USE_OF as the guard for appended dtb MIPS: BCM63XX: Use pr_* instead of printk MIPS: Loongson: Cleanup CONFIG_LOONGSON_SUSPEND. MIPS: lantiq: Disable xbar fpi burst mode MIPS: lantiq: Force the crossbar to big endian MIPS: lantiq: Initialize the USB core on boot MIPS: lantiq: Return correct value for fpi clock on ar9 MIPS: ralink: Add missing clock on rt305x ...
2015-11-11irqchip: irq-mips-gic: Provide function to map GIC user sectionAlex Smith1-0/+14
The GIC provides a "user-mode visible" section containing a mirror of the counter registers which can be mapped into user memory. This will be used by the VDSO time function implementations, so provide a function to map it in. When the GIC is not enabled in Kconfig a dummy inline version of this function is provided, along with "#define gic_present 0", so that we don't have to litter the VDSO code with ifdefs. [markos.chandras@imgtec.com: - Move mapping code to arch/mips/kernel/vdso.c and use a resource type to get the GIC usermode information - Avoid renaming function arguments and use __gic_base_addr to hold the base GIC address prior to ioremap.] [ralf@linux-mips.org: Fix up gic_get_usm_range() to compile and make inline again.] Signed-off-by: Alex Smith <alex.smith@imgtec.com> Signed-off-by: Markos Chandras <markos.chandras@imgtec.com> Reviewed-by: Marc Zyngier <marc.zyngier@arm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Alex Smith <alex.smith@imgtec.com> Cc: Markos Chandras <markos.chandras@imgtec.com> Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: http://patchwork.linux-mips.org/patch/11281/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2015-11-05Merge tag 'pm+acpi-4.4-rc1-1' of ↵Linus Torvalds2-37/+37
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull power management and ACPI updates from Rafael Wysocki: "Quite a new features are included this time. First off, the Collaborative Processor Performance Control interface (version 2) defined by ACPI will now be supported on ARM64 along with a cpufreq frontend for CPU performance scaling. Second, ACPI gets a new infrastructure for the early probing of IRQ chips and clock sources (along the lines of the existing similar mechanism for DT). Next, the ACPI core and the generic device properties API will now support a recently introduced hierarchical properties extension of the _DSD (Device Specific Data) ACPI device configuration object. If the ACPI platform firmware uses that extension to organize device properties in a hierarchical way, the kernel will automatically handle it and make those properties available to device drivers via the generic device properties API. It also will be possible to build the ACPICA's AML interpreter debugger into the kernel now and use that to diagnose AML-related problems more efficiently. In the future, this should make it possible to single-step AML execution and do similar things. Interesting stuff, although somewhat experimental at this point. Finally, the PM core gets a new mechanism that can be used by device drivers to distinguish between suspend-to-RAM (based on platform firmware support) and suspend-to-idle (or other variants of system suspend the platform firmware is not involved in) and possibly optimize their device suspend/resume handling accordingly. In addition to that, some existing features are re-organized quite substantially. First, the ACPI-based handling of PCI host bridges on x86 and ia64 is unified and the common code goes into the ACPI core (so as to reduce code duplication and eliminate non-essential differences between the two architectures in that area). Second, the Operating Performance Points (OPP) framework is reorganized to make the code easier to find and follow. Next, the cpufreq core's sysfs interface is reorganized to get rid of the "primary CPU" concept for configurations in which the same performance scaling settings are shared between multiple CPUs. Finally, some interfaces that aren't necessary any more are dropped from the generic power domains framework. On top of the above we have some minor extensions, cleanups and bug fixes in multiple places, as usual. Specifics: - ACPICA update to upstream revision 20150930 (Bob Moore, Lv Zheng). The most significant change is to allow the AML debugger to be built into the kernel. On top of that there is an update related to the NFIT table (the ACPI persistent memory interface) and a few fixes and cleanups. - ACPI CPPC2 (Collaborative Processor Performance Control v2) support along with a cpufreq frontend (Ashwin Chaugule). This can only be enabled on ARM64 at this point. - New ACPI infrastructure for the early probing of IRQ chips and clock sources (Marc Zyngier). - Support for a new hierarchical properties extension of the ACPI _DSD (Device Specific Data) device configuration object allowing the kernel to handle hierarchical properties (provided by the platform firmware this way) automatically and make them available to device drivers via the generic device properties interface (Rafael Wysocki). - Generic device properties API extension to obtain an index of certain string value in an array of strings, along the lines of of_property_match_string(), but working for all of the supported firmware node types, and support for the "dma-names" device property based on it (Mika Westerberg). - ACPI core fix to parse the MADT (Multiple APIC Description Table) entries in the order expected by platform firmware (and mandated by the specification) to avoid confusion on systems with more than 255 logical CPUs (Lukasz Anaczkowski). - Consolidation of the ACPI-based handling of PCI host bridges on x86 and ia64 (Jiang Liu). - ACPI core fixes to ensure that the correct IRQ number is used to represent the SCI (System Control Interrupt) in the cases when it has been re-mapped (Chen Yu). - New ACPI backlight quirk for Lenovo IdeaPad S405 (Hans de Goede). - ACPI EC driver fixes (Lv Zheng). - Assorted ACPI fixes and cleanups (Dan Carpenter, Insu Yun, Jiri Kosina, Rami Rosen, Rasmus Villemoes). - New mechanism in the PM core allowing drivers to check if the platform firmware is going to be involved in the upcoming system suspend or if it has been involved in the suspend the system is resuming from at the moment (Rafael Wysocki). This should allow drivers to optimize their suspend/resume handling in some cases and the changes include a couple of users of it (the i8042 input driver, PCI PM). - PCI PM fix to prevent runtime-suspended devices with PME enabled from being resumed during system suspend even if they aren't configured to wake up the system from sleep (Rafael Wysocki). - New mechanism to report the number of a wakeup IRQ that woke up the system from sleep last time (Alexandra Yates). - Removal of unused interfaces from the generic power domains framework and fixes related to latency measurements in that code (Ulf Hansson, Daniel Lezcano). - cpufreq core sysfs interface rework to make it handle CPUs that share performance scaling settings (represented by a common cpufreq policy object) more symmetrically (Viresh Kumar). This should help to simplify the CPU offline/online handling among other things. - cpufreq core fixes and cleanups (Viresh Kumar). - intel_pstate fixes related to the Turbo Activation Ratio (TAR) mechanism on client platforms which causes the turbo P-states range to vary depending on platform firmware settings (Srinivas Pandruvada). - intel_pstate sysfs interface fix (Prarit Bhargava). - Assorted cpufreq driver (imx, tegra20, powernv, integrator) fixes and cleanups (Bai Ping, Bartlomiej Zolnierkiewicz, Shilpasri G Bhat, Luis de Bethencourt). - cpuidle mvebu driver cleanups (Russell King). - OPP (Operating Performance Points) framework code reorganization to make it more maintainable (Viresh Kumar). - Intel Broxton support for the RAPL (Running Average Power Limits) power capping driver (Amy Wiles). - Assorted power management code fixes and cleanups (Dan Carpenter, Geert Uytterhoeven, Geliang Tang, Luis de Bethencourt, Rasmus Villemoes)" * tag 'pm+acpi-4.4-rc1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (108 commits) cpufreq: postfix policy directory with the first CPU in related_cpus cpufreq: create cpu/cpufreq/policyX directories cpufreq: remove cpufreq_sysfs_{create|remove}_file() cpufreq: create cpu/cpufreq at boot time cpufreq: Use cpumask_copy instead of cpumask_or to copy a mask cpufreq: ondemand: Drop unnecessary locks from update_sampling_rate() PM / Domains: Merge measurements for PM QoS device latencies PM / Domains: Don't measure ->start|stop() latency in system PM callbacks PM / clk: Fix broken build due to non-matching code and header #ifdefs ACPI / Documentation: add copy_dsdt to ACPI format options ACPI / sysfs: correctly check failing memory allocation ACPI / video: Add a quirk to force native backlight on Lenovo IdeaPad S405 ACPI / CPPC: Fix potential memory leak ACPI / CPPC: signedness bug in register_pcc_channel() ACPI / PAD: power_saving_thread() is not freezable ACPI / PM: Fix incorrect wakeup IRQ setting during suspend-to-idle ACPI: Using correct irq when waiting for events ACPI: Use correct IRQ when uninstalling ACPI interrupt handler cpuidle: mvebu: disable the bind/unbind attributes and use builtin_platform_driver cpuidle: mvebu: clean up multiple platform drivers ...
2015-11-04Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-nextLinus Torvalds1-10/+4
Pull networking updates from David Miller: Changes of note: 1) Allow to schedule ICMP packets in IPVS, from Alex Gartrell. 2) Provide FIB table ID in ipv4 route dumps just as ipv6 does, from David Ahern. 3) Allow the user to ask for the statistics to be filtered out of ipv4/ipv6 address netlink dumps. From Sowmini Varadhan. 4) More work to pass the network namespace context around deep into various packet path APIs, starting with the netfilter hooks. From Eric W Biederman. 5) Add layer 2 TX/RX checksum offloading to qeth driver, from Thomas Richter. 6) Use usec resolution for SYN/ACK RTTs in TCP, from Yuchung Cheng. 7) Support Very High Throughput in wireless MESH code, from Bob Copeland. 8) Allow setting the ageing_time in switchdev/rocker. From Scott Feldman. 9) Properly autoload L2TP type modules, from Stephen Hemminger. 10) Fix and enable offload features by default in 8139cp driver, from David Woodhouse. 11) Support both ipv4 and ipv6 sockets in a single vxlan device, from Jiri Benc. 12) Fix CWND limiting of thin streams in TCP, from Bendik Rønning Opstad. 13) Fix IPSEC flowcache overflows on large systems, from Steffen Klassert. 14) Convert bridging to track VLANs using rhashtable entries rather than a bitmap. From Nikolay Aleksandrov. 15) Make TCP listener handling completely lockless, this is a major accomplishment. Incoming request sockets now live in the established hash table just like any other socket too. From Eric Dumazet. 15) Provide more bridging attributes to netlink, from Nikolay Aleksandrov. 16) Use hash based algorithm for ipv4 multipath routing, this was very long overdue. From Peter Nørlund. 17) Several y2038 cures, mostly avoiding timespec. From Arnd Bergmann. 18) Allow non-root execution of EBPF programs, from Alexei Starovoitov. 19) Support SO_INCOMING_CPU as setsockopt, from Eric Dumazet. This influences the port binding selection logic used by SO_REUSEPORT. 20) Add ipv6 support to VRF, from David Ahern. 21) Add support for Mellanox Spectrum switch ASIC, from Jiri Pirko. 22) Add rtl8xxxu Realtek wireless driver, from Jes Sorensen. 23) Implement RACK loss recovery in TCP, from Yuchung Cheng. 24) Support multipath routes in MPLS, from Roopa Prabhu. 25) Fix POLLOUT notification for listening sockets in AF_UNIX, from Eric Dumazet. 26) Add new QED Qlogic river, from Yuval Mintz, Manish Chopra, and Sudarsana Kalluru. 27) Don't fetch timestamps on AF_UNIX sockets, from Hannes Frederic Sowa. 28) Support ipv6 geneve tunnels, from John W Linville. 29) Add flood control support to switchdev layer, from Ido Schimmel. 30) Fix CHECKSUM_PARTIAL handling of potentially fragmented frames, from Hannes Frederic Sowa. 31) Support persistent maps and progs in bpf, from Daniel Borkmann. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1790 commits) sh_eth: use DMA barriers switchdev: respect SKIP_EOPNOTSUPP flag in case there is no recursion net: sched: kill dead code in sch_choke.c irda: Delete an unnecessary check before the function call "irlmp_unregister_service" net: dsa: mv88e6xxx: include DSA ports in VLANs net: dsa: mv88e6xxx: disable SA learning for DSA and CPU ports net/core: fix for_each_netdev_feature vlan: Invoke driver vlan hooks only if device is present arcnet/com20020: add LEDS_CLASS dependency bpf, verifier: annotate verbose printer with __printf dp83640: Only wait for timestamps for packets with timestamping enabled. ptp: Change ptp_class to a proper bitmask dp83640: Prune rx timestamp list before reading from it dp83640: Delay scheduled work. dp83640: Include hash in timestamp/packet matching ipv6: fix tunnel error handling net/mlx5e: Fix LSO vlan insertion net/mlx5e: Re-eanble client vlan TX acceleration net/mlx5e: Return error in case mlx5e_set_features() fails net/mlx5e: Don't allow more than max supported channels ...
2015-11-04Merge branch 'irq-core-for-linus' of ↵Linus Torvalds27-464/+872
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull irq updates from Thomas Gleixner: "The irq departement delivers: - Rework the irqdomain core infrastructure to accomodate ACPI based systems. This is required to support ARM64 without creating artificial device tree nodes. - Sanitize the ACPI based ARM GIC initialization by making use of the new firmware independent irqdomain core - Further improvements to the generic MSI management - Generalize the irq migration on CPU hotplug - Improvements to the threaded interrupt infrastructure - Allow the migration of "chained" low level interrupt handlers - Allow optional force masking of interrupts in disable_irq[_nosysnc] - Support for two new interrupt chips - Sigh! - A larger set of errata fixes for ARM gicv3 - The usual pile of fixes, updates, improvements and cleanups all over the place" * 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (71 commits) Document that IRQ_NONE should be returned when IRQ not actually handled PCI/MSI: Allow the MSI domain to be device-specific PCI: Add per-device MSI domain hook of/irq: Use the msi-map property to provide device-specific MSI domain of/irq: Split of_msi_map_rid to reuse msi-map lookup irqchip/gic-v3-its: Parse new version of msi-parent property PCI/MSI: Use of_msi_get_domain instead of open-coded "msi-parent" parsing of/irq: Use of_msi_get_domain instead of open-coded "msi-parent" parsing of/irq: Add support code for multi-parent version of "msi-parent" irqchip/gic-v3-its: Add handling of PCI requester id. PCI/MSI: Add helper function pci_msi_domain_get_msi_rid(). of/irq: Add new function of_msi_map_rid() Docs: dt: Add PCI MSI map bindings irqchip/gic-v2m: Add support for multiple MSI frames irqchip/gic-v3: Fix translation of LPIs after conversion to irq_fwspec irqchip/mxs: Add Alphascale ASM9260 support irqchip/mxs: Prepare driver for hardware with different offsets irqchip/mxs: Panic if ioremap or domain creation fails irqdomain: Documentation updates irqdomain/msi: Use fwnode instead of of_node ...
2015-10-26irqchip/tegra: Propagate IRQ type setting to parentLucas Stach1-0/+1
The LIC doesn't deal with the different types of interrupts itself but needs to forward calls to set the appropriate type to its parent IRQ controller. Without this fix all IRQs routed through the LIC will stay at the initial EDGE type, while most of them should actually be level triggered. Fixes: 1eec582158e2 "irqchip: tegra: Add Tegra210 support" Signed-off-by: Lucas Stach <dev@lynxeye.de> Cc: Stephen Warren <swarren@wwwdotorg.org> Cc: Thierry Reding <thierry.reding@gmail.com> Cc: Alexandre Courbot <gnurou@gmail.com> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: <stable@vger.kernel.org> # 4.1 Link: http://lkml.kernel.org/r/1445787552-13062-1-git-send-email-dev@lynxeye.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-10-26irqchip/armada-370-xp: Fix regression by clearing IRQ_NOAUTOENThomas Petazzoni1-0/+1
Commit d17cab4451df1 ("irqchip: Kill off set_irq_flags usage") changed the code of armada_370_xp_mpic_irq_map() from using set_irq_flags() to irq_set_probe(). While the commit log seems to imply that there are no functional changes, there are indeed functional changes introduced by this commit: the IRQ_NOAUTOEN flag is no longer cleared. This functional change causes a regression on Armada XP, which no longer works properly after suspend/resume because per-CPU interrupts remain disabled. Due to how the hardware registers work, the irq-armada-370-xp cannot simply save/restore a bunch of registers at suspend/resume to make sure that the interrupts remain in the same state after resuming. Therefore, it relies on the kernel to say whether the interrupt is disabled or not, using the irqd_irq_disabled() function. This was all working fine while the IRQ_NOAUTOEN flag was cleared. With the change introduced by Rob Herring in d17cab4451df1, the IRQ_NOAUTOEN flag is now set for all interrupts. irqd_irq_disabled() returns false for per-CPU interrupts, and therefore our per-CPU interrupts are no longer re-enabled after resume. This commit works around this problem by clearing again the IRQ_NOAUTOEN flags, so that we are back to the situation we had before commit d17cab4451df1. This work around is proposed as a minimal fix for the problem, while a better long-term solution is being worked on. Fixes: d17cab4451df1 "irqchip: Kill off set_irq_flags usage" Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Link: https://lkml.kernel.org/r/1445435295-19956-1-git-send-email-thomas.petazzoni@free-electrons.com Signed-off-by: Jason Cooper <jason@lakedaemon.net> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-10-26Merge branch 'acpi-init'Rafael J. Wysocki2-37/+37
* acpi-init: clocksource: cosmetic: Drop OF 'dependency' from symbols clocksource / arm_arch_timer: Convert to ACPI probing clocksource: Add new CLKSRC_{PROBE,ACPI} config symbols clocksource / ACPI: Add probing infrastructure for ACPI-based clocksources irqchip / GIC: Convert the GIC driver to ACPI probing irqchip / ACPI: Add probing infrastructure for ACPI-based irqchips ACPI: Add early device probing infrastructure
2015-10-20Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller2-1/+4
Conflicts: drivers/net/usb/asix_common.c net/ipv4/inet_connection_sock.c net/switchdev/switchdev.c In the inet_connection_sock.c case the request socket hashing scheme is completely different in net-next. The other two conflicts were overlapping changes. Signed-off-by: David S. Miller <davem@davemloft.net>
2015-10-16irqchip/gic-v3-its: Parse new version of msi-parent propertyMarc Zyngier1-3/+15
Now that 126b16e2ad98 ("Docs: dt: add generic MSI bindings") has made it into the tree, the time has come to get rid of the old hack, and to parse msi-parent in its full glory. Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2015-10-16irqchip/gic-v3-its: Add handling of PCI requester id.David Daney1-3/+1
Replace open coded generation PCI/MSI requester id with call to the new function pci_msi_domain_get_msi_rid() which applies the "msi-map" to the id value. Reviewed-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: David Daney <david.daney@cavium.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2015-10-15irqchip/gic-v2m: Add support for multiple MSI framesMarc Zyngier1-46/+78
The GICv2m driver is so far limited to a single MSI frame, but nothing prevents an implementation from having several of them. This patch expands the driver to enumerate all frames, keeping the first one as the canonical identifier for the MSI domains. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Tested-by: Duc Dang <dhdang@apm.com> Cc: <linux-arm-kernel@lists.infradead.org> Cc: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> Cc: Jason Cooper <jason@lakedaemon.net> Link: http://lkml.kernel.org/r/1444822037-16983-3-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-10-15irqchip/gic-v3: Fix translation of LPIs after conversion to irq_fwspecMarc Zyngier1-9/+13
Commit f833f57ff254 ("irqchip: Convert all alloc/xlate users from of_node to fwnode") converted the GICv3 driver to using irq_fwspec as part of its 'translate' method. Too bad it ended up with a copy of the GICv2 'translate' method, which screws up LPI translation (by not translating them at all). Restore the code in its original shape, and just change what is really required... Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Cc: <linux-arm-kernel@lists.infradead.org> Cc: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> Cc: Duc Dang <dhdang@apm.com> Cc: Jason Cooper <jason@lakedaemon.net> Link: http://lkml.kernel.org/r/1444822037-16983-2-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-10-14irqchip/mxs: Add Alphascale ASM9260 supportOleksij Rempel4-2/+207
Freescale iMX23/iMX28 and Alphascale ASM9260 have similar interrupt collectors. We already prepared the mxs driver to handle a different register layout. Add the actual ASM9260 support. Differences between these devices: - Different register offsets - Different count of interupt lines per register - ASM9260 does not provide reset bit - ASM9260 does not support FIQ. Signed-off-by: Oleksij Rempel <linux@rempel-privat.de> Tested-by: Shawn Guo <shawnguo@kernel.org> Cc: Sascha Hauer <kernel@pengutronix.de> Cc: marc.zyngier@arm.com Cc: jason@lakedaemon.net Link: http://lkml.kernel.org/r/1444677334-12242-6-git-send-email-linux@rempel-privat.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-10-14irqchip/mxs: Prepare driver for hardware with different offsetsOleksij Rempel1-19/+59
Alphascale asm9260 has similar functionality but different register offsets. To support asm9260 in the mxs driver we need to rework the hardcoded access mechanisms. - Define SET_REG and CLR_REG. These controllers support seperate CLR and SET offsets for each register. - Reimplement HW_ICOLL_INTERRUPT with SET_REG and CLR_REG to make it usable for both cases. - Instead of using icoll_base and adding the offsets at runtime, create a new data structure which contains base pointers to all required regitsters and use it. - Split out functionality, which is required for the init code of mxs and asm9260, into helper functions [ tglx: Massaged changelog and moved the return value change to the previous patch ] Signed-off-by: Oleksij Rempel <linux@rempel-privat.de> Tested-by: Shawn Guo <shawnguo@kernel.org> Cc: Sascha Hauer <kernel@pengutronix.de> Cc: marc.zyngier@arm.com Cc: jason@lakedaemon.net Link: http://lkml.kernel.org/r/1444677334-12242-5-git-send-email-linux@rempel-privat.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-10-14irqchip/mxs: Panic if ioremap or domain creation failsOleksij Rempel1-2/+6
Current code will only warn and then dereference the NULL pointer or continue, which results in a fatal NULL pointer dereference later. If the initialization fails, the machine is unusable, so panic right away. [ tglx: Massaged changelog and picked the irqdomain panic from the next patch] Signed-off-by: Oleksij Rempel <linux@rempel-privat.de> Tested-by: Shawn Guo <shawnguo@kernel.org> Cc: Sascha Hauer <kernel@pengutronix.de> Cc: marc.zyngier@arm.com Cc: jason@lakedaemon.net Link: http://lkml.kernel.org/r/1444677334-12242-2-git-send-email-linux@rempel-privat.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-10-13irqdomain/msi: Use fwnode instead of of_nodeMarc Zyngier3-4/+7
As we continue to push of_node towards the outskirts of irq domains, let's start tackling the case of msi_create_irq_domain and its little friends. This has limited impact in both PCI/MSI, platform MSI, and a few drivers. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Tested-by: Hanjun Guo <hanjun.guo@linaro.org> Tested-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: <linux-arm-kernel@lists.infradead.org> Cc: Tomasz Nowicki <tomasz.nowicki@linaro.org> Cc: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> Cc: Graeme Gregory <graeme@xora.org.uk> Cc: Jake Oshins <jakeo@microsoft.com> Cc: Jiang Liu <jiang.liu@linux.intel.com> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Link: http://lkml.kernel.org/r/1444737105-31573-17-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-10-13irqchip/gic: Kill the xlate methodMarc Zyngier1-25/+0
We are now left with only two use models for the GIC driver: - Via a firmware interface, which mandates a hierarchical domain, and the use of the 'translate' method - The legacy platforms, which assume irq==hwirq, hence not using the 'xlate' method. The logical conclusion is that we can now nuke the 'xlate' method altogether. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Reviewed-and-tested-by: Hanjun Guo <hanjun.guo@linaro.org> Tested-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: <linux-arm-kernel@lists.infradead.org> Cc: Tomasz Nowicki <tomasz.nowicki@linaro.org> Cc: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> Cc: Graeme Gregory <graeme@xora.org.uk> Cc: Jake Oshins <jakeo@microsoft.com> Cc: Jiang Liu <jiang.liu@linux.intel.com> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Link: http://lkml.kernel.org/r/1444737105-31573-14-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-10-13irqchip/gic: Switch ACPI support to stacked domainsMarc Zyngier1-14/+30
Now that the basic ACPI GSI code is irq domain aware, make sure that the ACPI support in the GIC doesn't pointlessly deviate from the DT path. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Reviewed-and-tested-by: Hanjun Guo <hanjun.guo@linaro.org> Tested-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: <linux-arm-kernel@lists.infradead.org> Cc: Tomasz Nowicki <tomasz.nowicki@linaro.org> Cc: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> Cc: Graeme Gregory <graeme@xora.org.uk> Cc: Jake Oshins <jakeo@microsoft.com> Cc: Jiang Liu <jiang.liu@linux.intel.com> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Link: http://lkml.kernel.org/r/1444737105-31573-13-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-10-13irqchip/gic: Get rid of gic_init_bases()Marc Zyngier1-5/+3
Since nobody is using gic_init_bases anymore outside of the GIC driver itself, let's do a bit of housekeeping and remove the now useless entry point. Only gic_init() is now exposed to the rest of the kernel for the benefit of legacy systems. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Reviewed-and-tested-by: Hanjun Guo <hanjun.guo@linaro.org> Tested-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: <linux-arm-kernel@lists.infradead.org> Cc: Tomasz Nowicki <tomasz.nowicki@linaro.org> Cc: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> Cc: Graeme Gregory <graeme@xora.org.uk> Cc: Jake Oshins <jakeo@microsoft.com> Cc: Jiang Liu <jiang.liu@linux.intel.com> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Link: http://lkml.kernel.org/r/1444737105-31573-12-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-10-13irqchip: Convert all alloc/xlate users from of_node to fwnodeMarc Zyngier10-174/+236
Since we now have a generic data structure to express an interrupt specifier, convert all hierarchical irqchips that are OF based to use a fwnode_handle as part of their alloc and xlate (which becomes translate) callbacks. As most of these drivers have dependencies (they exchange IRQ specifiers), change them all in a single, massive patch... Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Reviewed-and-tested-by: Hanjun Guo <hanjun.guo@linaro.org> Tested-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: <linux-arm-kernel@lists.infradead.org> Cc: Tomasz Nowicki <tomasz.nowicki@linaro.org> Cc: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> Cc: Graeme Gregory <graeme@xora.org.uk> Cc: Jake Oshins <jakeo@microsoft.com> Cc: Jiang Liu <jiang.liu@linux.intel.com> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Link: http://lkml.kernel.org/r/1444737105-31573-6-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-10-13irqdomain: Use irq_domain_get_of_node() instead of direct field accessMarc Zyngier13-18/+19
The struct irq_domain contains a "struct device_node *" field (of_node) that is almost the only link between the irqdomain and the device tree infrastructure. In order to prepare for the removal of that field, convert all users to use irq_domain_get_of_node() instead. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Reviewed-and-tested-by: Hanjun Guo <hanjun.guo@linaro.org> Tested-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: <linux-arm-kernel@lists.infradead.org> Cc: Tomasz Nowicki <tomasz.nowicki@linaro.org> Cc: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> Cc: Graeme Gregory <graeme@xora.org.uk> Cc: Jake Oshins <jakeo@microsoft.com> Cc: Jiang Liu <jiang.liu@linux.intel.com> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Link: http://lkml.kernel.org/r/1444737105-31573-2-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-10-13Merge branch 'linus' into irq/coreThomas Gleixner3-3/+14
Bring in upstream updates for patches which depend on them
2015-10-10irqchip/gic-v3: Specialize readq and writeq accessesJean-Philippe Brucker1-3/+3
On 32bit platforms, we cannot assure that an I/O ldrd or strd will be done atomically. Besides, an hypervisor would be unable to emulate such accesses. In order to allow the AArch32 version of the driver to split them into two 32bit accesses while keeping the requirement for atomic writes, this patch specializes the IROUTER and TYPER accesses. Since the latter is an ID register, it won't need to be read atomically, but we still avoid future confusion by using gic_read_typer instead of a generic gic_readq. Reviewed-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2015-10-10irqchip/gic-v3: Change unsigned types for AArch32 compatibilityJean-Philippe Brucker1-13/+12
This patch does a few simple compatibility-related changes: - change the system register access prototypes to their actual size, - homogenise mpidr accesses with unsigned long, - force the 64bit register values to unsigned long long. Note: the list registers are 64bit on GICv3, but the AArch32 vGIC driver will need to split their values into two 32bit registers: LRn and LRCn. Reviewed-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2015-10-10irqchip/gic-v3: Refactor the arm64 specific partsJean-Philippe Brucker1-53/+4
This patch moves the GICv3 system register access helpers to arch/arm64/. Their 32bit counterparts will need to use mrc/mcr accesses instead of mrs_s/msr_s. [maz: fixed conflict with Cavium erratum handling] Reviewed-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2015-10-10irqchip/gic-v2m: Add workaround for APM X-Gene GICv2m erratumDuc Dang1-0/+22
APM X-Gene GICv2m implementation has an erratum where the MSI data needs to be the offset from the spi_start in order to trigger the correct MSI interrupt. This is different from the standard GICv2m implementation where the MSI data is the absolute value within the range from spi_start to (spi_start + num_spis) of each v2m frame. This patch reads MSI_IIDR register (present in all GICv2m implementations) to identify X-Gene GICv2m implementation and apply workaround to change the data portion of MSI vector. Reviewed-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Duc Dang <dhdang@apm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2015-10-10irqchip/gic: Warn if GICv3 system registers are enabledMarc Zyngier1-0/+15
When using a GICv3 in compatibility (v2) mode, having GICv3 system register access enabled is not really compliant with the architecture. Warn if the firmware (or the hypervisor) has been lazy. Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2015-10-10irqchip/gic-v3: Make gic_enable_sre an inline functionMarc Zyngier1-23/+9
In order for gic_enable_sre to be used by the arm64 core code, move it to arm-gic-v3.h. As a bonus, we now also check if system registers have been already enabled, and return early if they have. In all cases, the function now returns a boolean indicating if the enabling has been successful. Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2015-10-09irqchip/sunxi-nmi: Switch to of_io_request_and_map() from of_iomap()Chen-Yu Tsai1-1/+1
Switch to the new of_io_request_and_map() call, so the IO resource is properly held, and also shows up in /proc/iomem. Signed-off-by: Chen-Yu Tsai <wens@csie.org> Cc: linux-arm-kernel@lists.infradead.org Cc: Jason Cooper <jason@lakedaemon.net> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Maxime Ripard <maxime.ripard@free-electrons.com> Link: http://lkml.kernel.org/r/1444063334-19832-3-git-send-email-wens@csie.org Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-10-09irqchip/sunxi-nmi: Use driver name instead of DT node name for identificationChen-Yu Tsai1-9/+11
The device tree node name is typically "interrupt-controller", which is rather useless when used in printk messages and irq chip names for identification purposes. Use the driver name "sunxi-nmi" instead. While at it move the identifier from pr_err() calls to the pr_fmt macro. Also remove the "__func__" identifier from the error message in the interrupt type setting callback, sunxi_sc_nmi_set_type(). The driver name in the pr_fmt macro should be enough. Signed-off-by: Chen-Yu Tsai <wens@csie.org> Cc: linux-arm-kernel@lists.infradead.org Cc: Jason Cooper <jason@lakedaemon.net> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Maxime Ripard <maxime.ripard@free-electrons.com> Link: http://lkml.kernel.org/r/1444063334-19832-2-git-send-email-wens@csie.org Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-10-04Merge branch 'irq-urgent-for-linus' of ↵Linus Torvalds2-1/+4
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull irq fixes from Thomas Gleixner: "This update contains: - Fix for a long standing race affecting /proc/irq/NNN - One line fix for ARM GICV3-ITS counting the wrong data - Warning silencing in ARM GICV3-ITS. Another GCC trying to be overly clever issue" * 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: irqchip/gic-v3-its: Count additional LPIs for the aliased devices irqchip/gic-v3-its: Silence warning when its_lpi_alloc_chunks gets inlined genirq: Fix race in register_irq_proc()
2015-10-02irqchip/gic-v3-its: Count additional LPIs for the aliased devicesMarc Zyngier1-1/+1
When configuring the interrupt mapping for a new device, we iterate over all the possible aliases to account for their maximum MSI allocation. This was introduced by e8137f4f5088 ("irqchip: gicv3-its: Iterate over PCI aliases to generate ITS configuration"). Turns out that the code doing that is a bit braindead, and repeatedly accounts for the same device over and over. Fix this by counting the actual alias that is passed to us by the core code. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Cc: linux-arm-kernel@lists.infradead.org Cc: Alex Shi <alex.shi@linaro.org> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: David Daney <ddaney.cavm@gmail.com> Cc: Jason Cooper <jason@lakedaemon.net> Link: http://lkml.kernel.org/r/1443800646-8074-3-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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