kernel/linux.git/arch/arc/include/asm/smp.h, branch linux-4.16.y

ARC: IRQ: Do not use hwirq as virq and vice versa

2016-11-08T20:05:10+00:00

This came up when reviewing code to address missing IRQ affinity setting in AXS103 platform and/or implementing hierarchical IRQ domains - smp_ipi_irq_setup() callers pass hwirq but in turn calls request_percpu_irq() which expects a linux virq. So invoke irq_find_mapping() to do the conversion (also explicitify this in code by renaming the args appropriately) - idu_of_init()/idu_cascade_isr() were similarly using linux virq where hwirq is expected, so do the conversion using irqd_to_hwirq() helper Signed-off-by: Yuriy Kolerov [vgupta: made changelog a bit concise a bit] Signed-off-by: Vineet Gupta

Fix typos

2016-05-30T04:37:32+00:00

Signed-off-by: Andrea Gelmini Signed-off-by: Vineet Gupta

ARC: rename smp operation init_irq_cpu() to init_per_cpu()

2015-12-17T07:26:43+00:00

This will better reflect its description i.e. "any needed setup..." and not just do an "IPI request". Signed-off-by: Noam Camus Acked-by: Vineet Gupta Signed-off-by: Vineet Gupta

ARC: smp: Introduce smp hook @init_irq_cpu called for all cores

2015-10-28T10:43:41+00:00

Note this is not part of platform owned static machine_desc, but more of device owned plat_smp_ops (rather misnamed) which a IPI provider or some such typically defines. This will help us seperate out the IPI registration from platform specific init_cpu_smp() into device specific init_irq_cpu() Signed-off-by: Vineet Gupta

ARC: smp: Introduce smp hook @init_early_smp for Master core

2015-10-28T10:43:40+00:00

This adds a platform agnostic early SMP init hook which is called on Master core before calling setup_processor() setup_arch() smp_init_cpus() smp_ops.init_early_smp() ... setup_processor() How this helps: - Used for one time init of certain SMP centric IP blocks, before calling setup_processor() which probes various bits of core, possibly including this block - Currently platforms need to call this IP block init from their init routines, which doesn't make sense as this is specific to ARC core and not platform and otherwise requires copy/paste in all (and hence a possible point of failure) e.g. MCIP init is called from 2 platforms currently (axs10x and sim) which will go away once we have this. This change only adds the hooks but they are empty for now. Next commit will populate them and remove the explicit init calls from platforms. Signed-off-by: Vineet Gupta

ARC: Allow SMP kernel to build/boot on UP-only infrastructure

2014-09-27T09:19:01+00:00

In light of recent SNAFU with SMP build, allow simple platform to build as SMP but run UP. * Remove the dependence on simulation SMP extension to enable quick build/test iterations of SMP kernel. * In absence of platform SMP registration, prevent the NULL smp feature name from borkign the system Signed-off-by: Vineet Gupta

ARC: [SMP] IPI ACK interface doesn't need "self" cpu-id

2013-12-23T06:35:04+00:00

The interface is confusing, it feels like we are getting "sender" info, whereas it is the "receiver", which can very well be retrived by smp_processor_id(), if need be. Signed-off-by: Vineet Gupta

ARC: [SMP] cpumask not needed in IPI send path

2013-12-23T06:35:04+00:00

The current IPI sending callstack needlessly involves cpumask. arch_send_call_function_single_ipi(cpu) / smp_send_reschedule(cpu) ipi_send_msg(cpumask_of(cpu)) --> [cpu to cpumask] plat_smp_ops.ipi_send(callmap) for_each_cpu(callmap) --> [cpuask to cpu] do_plat_specific_ipi_PER_CPU Given that current backends are not capable of 1:N IPIs, lets simplify the interface for now, by keeping "a" cpu all along. Signed-off-by: Vineet Gupta

arc: remove '__init' for first_lines_of_secondary()

2013-11-06T05:11:43+00:00

first_lines_of_secondary() is a '__init' function, but it may be called by __cpu_up() by _cpu_up() by cpu_up() which is a normal export symbol function. So recommend to remove '__init'. The related warning (with allmodconfig): MODPOST vmlinux.o WARNING: vmlinux.o(.text+0x315c): Section mismatch in reference from the function __cpu_up() to the function .init.text:first_lines_of_secondary() The function __cpu_up() references the function __init first_lines_of_secondary(). This is often because __cpu_up lacks a __init annotation or the annotation of first_lines_of_secondary is wrong. Signed-off-by: Chen Gang

ARC: [Review] Multi-platform image #7: SMP common code to use callbacks

2013-02-15T17:46:16+00:00

This again is for switch from singleton platform SMP API to multi-platform paradigm Platform code is not yet setup to populate the callbacks, that happens in next commit Signed-off-by: Vineet Gupta Cc: Arnd Bergmann Acked-by: Arnd Bergmann