linux-dev/arch/metag/kernel/perf, branch master

metag: Remove arch/metag/

2018-02-22T11:07:21Z

The earliest Meta architecture port of Linux I have a record of was an import of a Meta port of Linux v2.4.1 in February 2004, which was worked on significantly over the next few years by Graham Whaley, Will Newton, Matt Fleming, myself and others. Eventually the port was merged into mainline in v3.9 in March 2013, not long after Imagination Technologies bought MIPS Technologies and shifted its CPU focus over to the MIPS architecture. As a result, though the port was maintained for a while, kept on life support for a while longer, and useful for testing a few specific drivers for which I don't have ready access to the equivalent MIPS hardware, it is now essentially dead with no users. It is also stuck using an out-of-tree toolchain based on GCC 4.2.4 which is no longer maintained, now struggles to build modern kernels due to toolchain bugs, and doesn't itself build with a modern GCC. The latest buildroot port is still using an old uClibc snapshot which is no longer served, and the latest uClibc doesn't build with GCC 4.2.4. So lets call it a day and drop the Meta architecture port from the kernel. RIP Meta. Signed-off-by: James Hogan Link: https://lkml.kernel.org/r/95906b76-6ce1-3f84-eaba-c29b4ae952eb@roeck-us.net Reviewed-by: Guenter Roeck Acked-by: Peter Zijlstra (Intel) Acked-by: Graham Whaley Cc: linux-metag@vger.kernel.org

cpu/hotplug: Cleanup state names

2016-12-25T09:47:44Z

When the state names got added a script was used to add the extra argument to the calls. The script basically converted the state constant to a string, but the cleanup to convert these strings into meaningful ones did not happen. Replace all the useless strings with 'subsys/xxx/yyy:state' strings which are used in all the other places already. Signed-off-by: Thomas Gleixner Cc: Peter Zijlstra Cc: Sebastian Siewior Link: http://lkml.kernel.org/r/20161221192112.085444152@linutronix.de Signed-off-by: Thomas Gleixner

metag/perf: Convert to hotplug state machine

2016-07-15T08:40:27Z

Install the callbacks via the state machine and let the core invoke the callbacks on the already online CPUs. Signed-off-by: Richard Cochran Signed-off-by: Anna-Maria Gleixner Reviewed-by: Sebastian Andrzej Siewior Cc: Alexander Shishkin Cc: Arnaldo Carvalho de Melo Cc: James Hogan Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: linux-metag@vger.kernel.org Cc: rt@linutronix.de Link: http://lkml.kernel.org/r/20160713153336.717395164@linutronix.de Signed-off-by: Ingo Molnar

metag: perf: fix build on Meta1

2016-05-03T08:25:30Z

Meta1 doesn't support PERF_ICORE or PERF_CHAN registers resulting in build errors due to missing definitions. Fix this with an ifdef matching the one in asm/metag_mem.h. The build errors (found by a randconfig): arch/metag/kernel/perf/perf_event.c: In function 'metag_pmu_enable_counter': arch/metag/kernel/perf/perf_event.c:639: error: 'PERF_ICORE0' undeclared (first use in this function) arch/metag/kernel/perf/perf_event.c:639: error: (Each undeclared identifier is reported only once arch/metag/kernel/perf/perf_event.c:639: error: for each function it appears in.) arch/metag/kernel/perf/perf_event.c:643: error: 'PERF_CHAN0' undeclared (first use in this function) Signed-off-by: James Hogan Cc: linux-metag@vger.kernel.org

metag: Replace __get_cpu_var uses for address calculation

2014-08-26T17:45:47Z

Replace __get_cpu_var uses for address calculation with this_cpu_ptr(). Acked-by: James Hogan Signed-off-by: Christoph Lameter Signed-off-by: Tejun Heo

metag, perf: Use common PMU interrupt disabled code

2014-06-18T16:43:45Z

Transition to using the new generic PERF_PMU_CAP_NO_INTERRUPT method for failing a sampling event when no PMU interrupt is available. Signed-off-by: Vince Weaver Acked-by: James Hogan Signed-off-by: Peter Zijlstra Cc: Arnaldo Carvalho de Melo Cc: Paul Mackerras Cc: linux-metag@vger.kernel.org Link: http://lkml.kernel.org/r/alpine.DEB.2.10.1406150202050.16738@vincent-weaver-1.umelst.maine.edu Signed-off-by: Ingo Molnar

metag: delete __cpuinit usage from all metag files

2013-07-14T23:36:54Z

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. Note that some harmless section mismatch warnings may result, since notify_cpu_starting() and cpu_up() are arch independent (kernel/cpu.c) are flagged as __cpuinit -- so if we remove the __cpuinit from arch specific callers, we will also get section mismatch warnings. As an intermediate step, we intend to turn the linux/init.h cpuinit content into no-ops as early as possible, since that will get rid of these warnings. In any case, they are temporary and harmless. This removes all the arch/metag uses of the __cpuinit macros from all C files. Currently metag does not have any __CPUINIT used in assembly files. [1] https://lkml.org/lkml/2013/5/20/589 Cc: James Hogan Acked-by: James Hogan Signed-off-by: Paul Gortmaker

perf: Add const qualifier to perf_pmu_register's 'name' arg

2013-06-19T10:50:23Z

This allows us to use pdev->name for registering a PMU device. IMO the name is not supposed to be changed anyway. Signed-off-by: Mischa Jonker Signed-off-by: Peter Zijlstra Link: http://lkml.kernel.org/r/1370339148-5566-1-git-send-email-mjonker@synopsys.com Signed-off-by: Ingo Molnar

metag: perf: prepare for use by oprofile

2013-03-15T13:20:19Z

To allow our perf_events code to work with oprofile the PERF_TYPE_RAW event type attribute is implemented, which allows the internal encoding of events to be used externally (this requires some tweaks so that it handles invalid event types more gracefully), and perf_pmu_name() is adjusted to return metag_pmu->name instead of metag_pmu->pmu.name (which is changed to "meta2"). Signed-off-by: James Hogan Cc: Peter Zijlstra Cc: Paul Mackerras Cc: Ingo Molnar Cc: Arnaldo Carvalho de Melo Cc: Robert Richter Cc: oprofile-list@lists.sf.net

metag: perf: don't reset TXTACTCYC

2013-03-15T13:20:15Z

The thread active cycle counter TXTACTCYC is used in __delay so it shouldn't really be reset to zero by perf. Fix perf to just read the value, and instead of clearing it, record the prev_count value in enable_counter so that the delta calculations know about the previous value. Signed-off-by: James Hogan Cc: Peter Zijlstra Cc: Paul Mackerras Cc: Ingo Molnar Cc: Arnaldo Carvalho de Melo