linux.git/arch/parisc/kernel/processor.c, branch v4.11 Linux kernel source tree parisc: Optimize timer interrupt function 2016-12-20T20:39:40+00:00 Helge Deller deller@gmx.de 2016-12-20T19:51:10+00:00 160494d381373cfa21208484aea4e5db2d3cb0a8 Restructure the timer interrupt function to better cope with missed timer irqs. Optimize the calculation when the next interrupt should happen and skip irqs if they would happen too shortly after exit of the irq function. The update_process_times() call is done anyway at every timer irq, so we can safely drop the prof_counter and prof_multiplier variables from the per_cpu structure. Signed-off-by: Helge Deller <deller@gmx.de> 
Restructure the timer interrupt function to better cope with missed timer irqs.
Optimize the calculation when the next interrupt should happen and skip irqs if
they would happen too shortly after exit of the irq function.

The update_process_times() call is done anyway at every timer irq, so we can
safely drop the prof_counter and prof_multiplier variables from the per_cpu
structure.

Signed-off-by: Helge Deller <deller@gmx.de>
parisc: Enhance CPU detection code on PAT machines 2016-12-12T21:28:09+00:00 Helge Deller deller@gmx.de 2016-11-17T20:27:50+00:00 637250cc8f5e2bfc5c3a96802d1d96b4987a1d62 This patch fixes the debug code which runs during the inventory scan on machines with PAT firmware. Additionally print out the relationship between the detected logical CPU number and it's physical location and physical cpu number. This leads to information which can be used to feed numa-structures in the kernel in later patches. An example output is from my single-CPU (2 cores) C8000 machine is: Logical CPU #0 is physical cpu #0 at 0xffff0000ffff15, hpa 0xfffffffffe780000 Logical CPU #1 is physical cpu #1 at 0xffff0000ffff15, hpa 0xfffffffffe781000 Signed-off-by: Helge Deller <deller@gmx.de> 
This patch fixes the debug code which runs during the inventory scan on
machines with PAT firmware.

Additionally print out the relationship between the detected logical CPU
number and it's physical location and physical cpu number.
This leads to information which can be used to feed numa-structures in
the kernel in later patches. An example output is from my single-CPU (2
cores) C8000 machine is:

  Logical CPU #0 is physical cpu #0 at 0xffff0000ffff15, hpa 0xfffffffffe780000
  Logical CPU #1 is physical cpu #1 at 0xffff0000ffff15, hpa 0xfffffffffe781000

Signed-off-by: Helge Deller <deller@gmx.de>
parisc: Fix automatic selection of cr16 clocksource 2016-08-20T11:33:51+00:00 Helge Deller deller@gmx.de 2016-08-19T20:39:02+00:00 ae141830b118c3fb5b7eab6fa7c8ab7b7224b0a4 Commit 54b66800907 (parisc: Add native high-resolution sched_clock() implementation) added support to use the CPU-internal cr16 counters as reliable clocksource with the help of HAVE_UNSTABLE_SCHED_CLOCK. Sadly the commit missed to remove the hack which prevented cr16 to become the default clocksource even on SMP systems. Signed-off-by: Helge Deller <deller@gmx.de> Cc: stable@vger.kernel.org # 4.7+ 
Commit 54b66800907 (parisc: Add native high-resolution sched_clock()
implementation) added support to use the CPU-internal cr16 counters as reliable
clocksource with the help of HAVE_UNSTABLE_SCHED_CLOCK.

Sadly the commit missed to remove the hack which prevented cr16 to become the
default clocksource even on SMP systems.

Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org # 4.7+
parisc: Fix printk time during boot 2016-06-05T06:45:09+00:00 Helge Deller deller@gmx.de 2016-06-03T17:22:31+00:00 0032c08833ab7c7861d12eb35da26dce85f3e229 Avoid showing invalid printk time stamps during boot. Signed-off-by: Helge Deller <deller@gmx.de> Reviewed-by: Aaro Koskinen <aaro.koskinen@iki.fi> 
Avoid showing invalid printk time stamps during boot.

Signed-off-by: Helge Deller <deller@gmx.de>
Reviewed-by: Aaro Koskinen <aaro.koskinen@iki.fi>
parisc: Reduce overhead of parisc_requires_coherency() 2016-01-12T21:03:36+00:00 Helge Deller deller@gmx.de 2015-12-12T17:22:03+00:00 fc6325750348272d10a8e39adb9fc0e89a667774 Signed-off-by: Helge Deller <deller@gmx.de> 
Signed-off-by: Helge Deller <deller@gmx.de>
parisc: delete __cpuinit usage from all users 2013-07-14T23:36:51+00:00 Paul Gortmaker paul.gortmaker@windriver.com 2013-06-17T19:43:14+00:00 60ffef065dd40b91f6f76af6c7510ddf23102f54 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 <James.Bottomley@HansenPartnership.com> Cc: Helge Deller <deller@gmx.de> Cc: linux-parisc@vger.kernel.org Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> 
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 <James.Bottomley@HansenPartnership.com>
Cc: Helge Deller <deller@gmx.de>
Cc: linux-parisc@vger.kernel.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
parisc: more capabilities info in /proc/cpuinfo 2013-07-09T20:09:17+00:00 Helge Deller deller@gmx.de 2013-06-21T21:32:44+00:00 30a9f0b251285ba29f09a7134eee07a4c3aca639 Signed-off-by: Helge Deller <deller@gmx.de> Cc: <stable@vger.kernel.org> # 3.10 
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: <stable@vger.kernel.org> # 3.10
parisc: processor.c, fix bloated stack frame 2009-07-03T03:34:11+00:00 Kyle McMartin kyle@mcmartin.ca 2009-06-23T17:10:03+00:00 64a0cdb026666cd9911fa045b863fb1f0f255dd8 The pa_pdc_cell struct can be kmalloc'd, so do that instead. Signed-off-by: Kyle McMartin <kyle@mcmartin.ca> 
The pa_pdc_cell struct can be kmalloc'd, so do that instead.

Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
parisc: remove CVS keywords 2009-07-03T03:34:06+00:00 Alexander Beregalov a.beregalov@gmail.com 2009-04-03T01:49:22+00:00 071327ec9005e9a826d088d37021ed2c88e683f7 Signed-off-by: Alexander Beregalov <a.beregalov@gmail.com> Acked-by: Matthew Wilcox <willy@linux.intel.com> Acked-by: Grant Grundler <grundler@parisc-linux.org> Signed-off-by: Kyle McMartin <kyle@mcmartin.ca> 
Signed-off-by: Alexander Beregalov <a.beregalov@gmail.com>
Acked-by: Matthew Wilcox <willy@linux.intel.com>
Acked-by: Grant Grundler <grundler@parisc-linux.org>
Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
Merge branch 'rusty-cpumask-parisc' into parisc 2009-04-02T01:43:14+00:00 Kyle McMartin kyle@mcmartin.ca 2009-04-02T01:43:14+00:00 7cec2ef4a298605b010f1c80041de884e777ea67