kernel.git/arch/parisc/kernel/smp.c, branch linux-4.9.y

parisc/kgdb: add kgdb_roundup() to make kgdb work with idle polling

2021-11-26T10:48:32Z

[ Upstream commit 66e29fcda1824f0427966fbee2bd2c85bf362c82 ] With idle polling, IPIs are not sent when a CPU idle, but queued and run later from do_idle(). The default kgdb_call_nmi_hook() implementation gets the pointer to struct pt_regs from get_irq_reqs(), which doesn't work in that case because it was not called from the IPI interrupt handler. Fix it by defining our own kgdb_roundup() function which sents an IPI_ENTER_KGDB. When that IPI is received on the target CPU kgdb_nmicallback() is called. Signed-off-by: Sven Schnelle Signed-off-by: Helge Deller Signed-off-by: Sasha Levin

parisc: Check return value of smp_boot_one_cpu()

2016-09-20T16:02:36Z

Check return value of smp_boot_one_cpu() whether CPU could be brought up. Reported-by: John David Anglin Signed-off-by: Helge Deller

arch/hotplug: Call into idle with a proper state

2016-03-01T19:36:57Z

Let the non boot cpus call into idle with the corresponding hotplug state, so the hotplug core can handle the further bringup. That's a first step to convert the boot side of the hotplugged cpus to do all the synchronization with the other side through the state machine. For now it'll only start the hotplug thread and kick the full bringup of the cpu. Signed-off-by: Thomas Gleixner Cc: linux-arch@vger.kernel.org Cc: Rik van Riel Cc: Rafael Wysocki Cc: "Srivatsa S. Bhat" Cc: Peter Zijlstra Cc: Arjan van de Ven Cc: Sebastian Siewior Cc: Rusty Russell Cc: Steven Rostedt Cc: Oleg Nesterov Cc: Tejun Heo Cc: Andrew Morton Cc: Paul McKenney Cc: Linus Torvalds Cc: Paul Turner Link: http://lkml.kernel.org/r/20160226182341.614102639@linutronix.de Signed-off-by: Thomas Gleixner

parisc: Remove unused function

2015-02-17T09:41:19Z

Remove the function smp_send_start() that is not used anywhere. This was partially found by using a static code analysis program called cppcheck. Signed-off-by: Rickard Strandqvist Signed-off-by: Helge Deller

parisc: do not count IPI calls twice

2013-11-07T21:28:54Z

The number of IPI calls is already visible as per-cpu IPI irq counters in/proc/cpuinfo, so let's drop this additional counting. This partly reverts: cd85d55 parisc: more irq statistics in /proc/interrupts Signed-off-by: Helge Deller

parisc: kill SMP single function call interrupt

2013-10-13T15:44:29Z

Commit 9a46ad6d6df3b54 "smp: make smp_call_function_many() use logic similar to smp_call_function_single()" has unified the way to handle single and multiple cross-CPU function calls. Now only one interrupt is needed for architecture specific code to support generic SMP function call interfaces, so kill the redundant single function call interrupt. Signed-off-by: Jiang Liu Cc: Jiang Liu Signed-off-by: Helge Deller

parisc: delete __cpuinit usage from all users

2013-07-14T23:36:51Z

The __cpuinit type of throwaway sections might have made sense some time ago when RAM was more constrained, but now the savings do not offset the cost and complications. For example, the fix in commit 5e427ec2d0 ("x86: Fix bit corruption at CPU resume time") is a good example of the nasty type of bugs that can be created with improper use of the various __init prefixes. After a discussion on LKML[1] it was decided that cpuinit should go the way of devinit and be phased out. Once all the users are gone, we can then finally remove the macros themselves from linux/init.h. This removes all the parisc uses of the __cpuinit macros. [1] https://lkml.org/lkml/2013/5/20/589 Acked-by: James Bottomley Cc: Helge Deller Cc: linux-parisc@vger.kernel.org Signed-off-by: Paul Gortmaker

parisc: tlb flush counting fix for SMP and UP

2013-05-07T21:44:04Z

Fix up build error on UP and show correctly number of function call (ipi) irqs. Signed-off-by: Helge Deller

parisc: more irq statistics in /proc/interrupts

2013-05-07T20:39:22Z

Add framework and initial values for more fine grained statistics in /proc/interrupts. Signed-off-by: Helge Deller

parisc: Use generic idle loop

2013-04-08T15:39:27Z

Signed-off-by: Thomas Gleixner Cc: Linus Torvalds Cc: Rusty Russell Cc: Paul McKenney Cc: Peter Zijlstra Reviewed-by: Cc: Srivatsa S. Bhat Cc: Magnus Damm Cc: James E.J. Bottomley Cc: Helge Deller Link: http://lkml.kernel.org/r/20130321215234.956305981@linutronix.de Signed-off-by: Thomas Gleixner