kernel.git/arch/xtensa/kernel/irq.c, branch linux-4.4.y

xtensa: call irqchip_init only when CONFIG_USE_OF is selected

2021-10-17T08:04:43Z

[ Upstream commit 6489f8d0e1d93a3603d8dad8125797559e4cf2a2 ] During boot time kernel configured with OF=y but USE_OF=n displays the following warnings and hangs shortly after starting userspace: ------------[ cut here ]------------ WARNING: CPU: 0 PID: 0 at kernel/irq/irqdomain.c:695 irq_create_mapping_affinity+0x29/0xc0 irq_create_mapping_affinity(, 6) called with NULL domain CPU: 0 PID: 0 Comm: swapper Not tainted 5.15.0-rc3-00001-gd67ed2510d28 #30 Call Trace: __warn+0x69/0xc4 warn_slowpath_fmt+0x6c/0x94 irq_create_mapping_affinity+0x29/0xc0 local_timer_setup+0x40/0x88 time_init+0xb1/0xe8 start_kernel+0x31d/0x3f4 _startup+0x13b/0x13b ---[ end trace 1e6630e1c5eda35b ]--- ------------[ cut here ]------------ WARNING: CPU: 0 PID: 0 at arch/xtensa/kernel/time.c:141 local_timer_setup+0x58/0x88 error: can't map timer irq CPU: 0 PID: 0 Comm: swapper Tainted: G W 5.15.0-rc3-00001-gd67ed2510d28 #30 Call Trace: __warn+0x69/0xc4 warn_slowpath_fmt+0x6c/0x94 local_timer_setup+0x58/0x88 time_init+0xb1/0xe8 start_kernel+0x31d/0x3f4 _startup+0x13b/0x13b ---[ end trace 1e6630e1c5eda35c ]--- Failed to request irq 0 (timer) Fix that by calling irqchip_init only when CONFIG_USE_OF is selected and calling legacy interrupt controller init otherwise. Fixes: da844a81779e ("xtensa: add device trees support") Signed-off-by: Max Filippov Signed-off-by: Sasha Levin

xtensa: don't use linux IRQ #0

2017-06-17T04:39:38Z

commit e5c86679d5e864947a52fb31e45a425dea3e7fa9 upstream. Linux IRQ #0 is reserved for error reporting and may not be used. Increase NR_IRQS for one additional slot and increase irq_domain_add_legacy parameter first_irq value to 1, so that linux IRQ #0 is not associated with hardware IRQ #0 in legacy IRQ domains. Introduce macro XTENSA_PIC_LINUX_IRQ for static translation of xtensa PIC hardware IRQ # to linux IRQ #. Use this macro in XTFPGA platform data definitions. This fixes inability to use hardware IRQ #0 in configurations that don't use device tree and allows for non-identity mapping between linux IRQ # and hardware IRQ #. Signed-off-by: Max Filippov Signed-off-by: Greg Kroah-Hartman

Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2015-09-01T21:33:35Z

Pull irq updates from Thomas Gleixner: "This updated pull request does not contain the last few GIC related patches which were reported to cause a regression. There is a fix available, but I let it breed for a couple of days first. The irq departement provides: - new infrastructure to support non PCI based MSI interrupts - a couple of new irq chip drivers - the usual pile of fixlets and updates to irq chip drivers - preparatory changes for removal of the irq argument from interrupt flow handlers - preparatory changes to remove IRQF_VALID" * 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (129 commits) irqchip/imx-gpcv2: IMX GPCv2 driver for wakeup sources irqchip: Add bcm2836 interrupt controller for Raspberry Pi 2 irqchip: Add documentation for the bcm2836 interrupt controller irqchip/bcm2835: Add support for being used as a second level controller irqchip/bcm2835: Refactor handle_IRQ() calls out of MAKE_HWIRQ PCI: xilinx: Fix typo in function name irqchip/gic: Ensure gic_cpu_if_up/down() programs correct GIC instance irqchip/gic: Only allow the primary GIC to set the CPU map PCI/MSI: pci-xgene-msi: Consolidate chained IRQ handler install/remove unicore32/irq: Prepare puv3_gpio_handler for irq argument removal tile/pci_gx: Prepare trio_handle_level_irq for irq argument removal m68k/irq: Prepare irq handlers for irq argument removal C6X/megamode-pic: Prepare megamod_irq_cascade for irq argument removal blackfin: Prepare irq handlers for irq argument removal arc/irq: Prepare idu_cascade_isr for irq argument removal sparc/irq: Use access helper irq_data_get_affinity_mask() sparc/irq: Use helper irq_data_get_irq_handler_data() parisc/irq: Use access helper irq_data_get_affinity_mask() mn10300/irq: Use access helper irq_data_get_affinity_mask() irqchip/i8259: Prepare i8259_irq_dispatch for irq argument removal ...

xtensa: drop unused irq_err_count

2015-08-17T04:33:41Z

Signed-off-by: Max Filippov

xtensa: implement fake NMI

2015-08-17T04:33:39Z

In case perf IRQ is the highest of the medium-level IRQs, and is alone on its level, it may be treated as NMI: - LOCKLEVEL is defined to be one level less than EXCM level, - IRQ masking never lowers current IRQ level, - new fake exception cause code, EXCCAUSE_MAPPED_NMI is assigned to that IRQ; new second level exception handler, do_nmi, assigned to it handles it as NMI, - atomic operations in configurations without s32c1i still need to mask all interrupts. Cc: Peter Zijlstra Acked-by: Peter Zijlstra (Intel) Signed-off-by: Max Filippov

xtensa: add profiling IRQ type to xtensa_irq_map

2015-08-17T04:32:53Z

Signed-off-by: Max Filippov

xtensa/irq: Use access helper irq_data_get_affinity_mask()

2015-07-29T08:08:11Z

This is a preparatory patch for moving irq_data struct members. Signed-off-by: Jiang Liu Cc: Chris Zankel Link: http://lkml.kernel.org/r/20150713172018.264485572@linutronix.de Signed-off-by: Thomas Gleixner Signed-off-by: Ingo Molnar

xtensa: Use irq_set_affinity instead of homebrewn code

2014-03-04T16:37:55Z

There is no point in having an incomplete copy of irq_set_affinity() for the hotplug irq migration code. Use the core function instead and while at it switch to for_each_active_irq() Signed-off-by: Thomas Gleixner Cc: Peter Zijlstra Cc: Chris Zankel Cc: xtensa Link: http://lkml.kernel.org/r/20140223212736.664624945@linutronix.de Signed-off-by: Thomas Gleixner

xtensa: implement CPU hotplug

2014-01-14T18:19:59Z

Signed-off-by: Max Filippov Signed-off-by: Chris Zankel

xtensa: add SMP support

2014-01-14T18:19:58Z

This is largely based on SMP code from the xtensa-2.6.29-smp tree by Piet Delaney, Marc Gauthier, Joe Taylor, Christian Zankel (and possibly other Tensilica folks). Signed-off-by: Max Filippov Signed-off-by: Chris Zankel