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* perf_counter, x86: fix zero irq_period countersIngo Molnar2009-05-171-0/+3
| | | | | | | | | | | | | | | | | | | | The quirk to irq_period unearthed an unrobustness we had in the hw_counter initialization sequence: we left irq_period at 0, which was then quirked up to 2 ... which then generated a _lot_ of interrupts during 'perf stat' runs, slowed them down and skewed the counter results in general. Initialize irq_period to the maximum instead. [ Impact: fix perf stat results ] Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Srivatsa Vaddagiri <vatsa@in.ibm.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf_counter: frequency based adaptive irq_periodPeter Zijlstra2009-05-151-6/+3
| | | | | | | | | | | | | | Instead of specifying the irq_period for a counter, provide a target interrupt frequency and dynamically adapt the irq_period to match this frequency. [ Impact: new perf-counter attribute/feature ] Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <20090515132018.646195868@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf_counter: x86: Protect against infinite loops in intel_pmu_handle_irq()Ingo Molnar2009-05-151-7/+18
| | | | | | | | | | | | | | | | intel_pmu_handle_irq() can lock up in an infinite loop if the hardware does not allow the acking of irqs. Alas, this happened in testing so make this robust and emit a warning if it happens in the future. Also, clean up the IRQ handlers a bit. [ Impact: improve perfcounter irq/nmi handling robustness ] Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf_counter: x86: Disallow interval of 1Ingo Molnar2009-05-151-0/+5
| | | | | | | | | | | | | | | On certain CPUs i have observed a stuck PMU if interval was set to 1 and NMIs were used. The PMU had PMC0 set in MSR_CORE_PERF_GLOBAL_STATUS, but it was not possible to ack it via MSR_CORE_PERF_GLOBAL_OVF_CTRL, and the NMI loop got stuck infinitely. [ Impact: fix rare hangs during high perfcounter load ] Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf_counter: x86: Robustify interrupt handlingPeter Zijlstra2009-05-151-3/+13
| | | | | | | | | | | | | Two consecutive NMIs could daze and confuse the machine when the first would handle the overflow of both counters. [ Impact: fix false-positive syslog messages under multi-session profiling ] Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf_counter: Rework the perf counter disable/enablePeter Zijlstra2009-05-151-71/+42
| | | | | | | | | | | | | | | | | | | | | | | | The current disable/enable mechanism is: token = hw_perf_save_disable(); ... /* do bits */ ... hw_perf_restore(token); This works well, provided that the use nests properly. Except we don't. x86 NMI/INT throttling has non-nested use of this, breaking things. Therefore provide a reference counter disable/enable interface, where the first disable disables the hardware, and the last enable enables the hardware again. [ Impact: refactor, simplify the PMU disable/enable logic ] Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf_counter: x86: Fix up the amd NMI/INT throttlePeter Zijlstra2009-05-151-12/+26
| | | | | | | | | | | | | perf_counter_unthrottle() restores throttle_ctrl, buts its never set. Also, we fail to disable all counters when throttling. [ Impact: fix rare stuck perf-counters when they are throttled ] Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf_counter: x86: Allow unpriviliged use of NMIsPeter Zijlstra2009-05-151-1/+4
| | | | | | | | | | | | | Apply sysctl_perf_counter_priv to NMIs. Also, fail the counter creation instead of silently down-grading to regular interrupts. [ Impact: allow wider perf-counter usage ] Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf_counter: x86: Fix throttlingIngo Molnar2009-05-151-5/+15
| | | | | | | | | | | | | | | | | If counters are disabled globally when a perfcounter IRQ/NMI hits, and if we throttle in that case, we'll promote the '0' value to the next lapic IRQ and disable all perfcounters at that point, permanently ... Fix it. [ Impact: fix hung perfcounters under load ] Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf_counter: x86: More accurate counter updatePeter Zijlstra2009-05-151-3/+6
| | | | | | | | | | | | | | | Take the counter width into account instead of assuming 32 bits. In particular Nehalem has 44 bit wide counters, and all arithmetics should happen on a 44-bit signed integer basis. [ Impact: fix rare event imprecision, warning message on Nehalem ] Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf_counter: fix print debug irq disablePeter Zijlstra2009-05-131-2/+3
| | | | | | | | | | | | | | | inconsistent {IN-HARDIRQ-W} -> {HARDIRQ-ON-W} usage. bash/15802 [HC0[0]:SC0[0]:HE1:SE1] takes: (sysrq_key_table_lock){?.....}, Don't unconditionally enable interrupts in the perf_counter_print_debug() path. [ Impact: fix potential deadlock pointed out by lockdep ] LKML-Reference: <new-submission> Reported-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
* perf_counter, x86: clean up throttling printkMike Galbraith2009-05-111-1/+1
| | | | | | | | | | | | | | | | s/PERFMON/perfcounters for perfcounter interrupt throttling warning. 'perfmon' is the CPU feature name that is Intel-only, while we do throttling in a generic way. [ Impact: cleanup ] Signed-off-by: Mike Galbraith <efault@gmx.de> Cc: Robert Richter <robert.richter@amd.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf_counter: fix fixed-purpose counter support on v2 Intel-PERFMONIngo Molnar2009-05-041-1/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | Fixed-purpose counters stopped working in a simple 'perf stat ls' run: <not counted> cache references <not counted> cache misses Due to: ef7b3e0: perf_counter, x86: remove vendor check in fixed_mode_idx() Which made x86_pmu.num_counters_fixed matter: if it's nonzero, the fixed-purpose counters are utilized. But on v2 perfmon this field is not set (despite there being fixed-purpose PMCs). So add a quirk to set the number of fixed-purpose counters to at least three. [ Impact: add quirk for three fixed-purpose counters on certain Intel CPUs ] Cc: Robert Richter <robert.richter@amd.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1241002046-8832-28-git-send-email-robert.richter@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf_counter: x86: fixup nmi_watchdog vs perf_counter boo-booPeter Zijlstra2009-05-041-7/+7
| | | | | | | | | | | | | | Invert the atomic_inc_not_zero() test so that we will indeed detect the first activation. Also rename the global num_counters, since its easy to confuse with x86_pmu.num_counters. [ Impact: fix non-working perfcounters on AMD CPUs, cleanup ] Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1241455664.7620.4938.camel@twins> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf_counter: fix nmi-watchdog interactionPeter Zijlstra2009-05-011-0/+3
| | | | | | | | | | | | | When we don't have any perf-counters active, don't act like we know what the NMI is for. [ Impact: fix hard hang with nmi_watchdog=2 ] Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> LKML-Reference: <20090501102533.109867793@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* Merge branch 'core/signal' into perfcounters/coreThomas Gleixner2009-04-304-3/+8
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | This is necessary to avoid the conflict of syscall numbers. Conflicts: arch/x86/ia32/ia32entry.S arch/x86/include/asm/unistd_32.h arch/x86/include/asm/unistd_64.h Fixes up the borked syscall numbers of perfcounters versus preadv/pwritev as well. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * x86: hookup sys_rt_tgsigqueueinfoThomas Gleixner2009-04-304-0/+5
| | | | | | | | | | | | Make the new sys_rt_tgsigqueueinfo available for x86. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* | perf_counter, x86: rename bitmasks to ->used_mask and ->active_maskRobert Richter2009-04-291-14/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Standardize on explicitly mentioning '_mask' in fields that are not plain flags but masks. This avoids typos like: if (cpuc->used) (which could easily slip through review unnoticed), while if a typo looks like this: if (cpuc->used_mask) it might get noticed during review. [ Impact: cleanup ] Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <1241016956-24648-1-git-send-email-robert.richter@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf_counter: add/update copyrightsIngo Molnar2009-04-291-4/+5
| | | | | | | | | | Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf_counter, x86: remove unused function argument in intel_pmu_get_status()Robert Richter2009-04-291-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | The mask argument is unused and thus can be removed. [ Impact: cleanup ] Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: Paul Mackerras <paulus@samba.org> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1241002046-8832-29-git-send-email-robert.richter@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf_counter, x86: remove vendor check in fixed_mode_idx()Robert Richter2009-04-291-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The function fixed_mode_idx() is used generically. Now it checks the num_counters_fixed value instead of the vendor to decide if fixed counters are present. [ Impact: generalize code ] Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: Paul Mackerras <paulus@samba.org> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1241002046-8832-28-git-send-email-robert.richter@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf_counter, x86: introduce max_period variableRobert Richter2009-04-291-8/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | In x86 pmus the allowed counter period to programm differs. This introduces a max_period value and allows the generic implementation for all models to check the max period. [ Impact: generalize code ] Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: Paul Mackerras <paulus@samba.org> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1241002046-8832-27-git-send-email-robert.richter@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf_counter, x86: return raw count with x86_perf_counter_update()Robert Richter2009-04-291-3/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | To check on AMD cpus if a counter overflows, the upper bit of the raw counter value must be checked. This value is already internally available in x86_perf_counter_update(). Now, the value is returned so that it can be used directly to check for overflows. [ Impact: micro-optimization ] Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: Paul Mackerras <paulus@samba.org> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1241002046-8832-26-git-send-email-robert.richter@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf_counter, x86: implement the interrupt handler for AMD cpusRobert Richter2009-04-291-8/+37
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch implements the interrupt handler for AMD performance counters. In difference to the Intel pmu, there is no single status register and also there are no fixed counters. This makes the handler very different and it is useful to make the handler vendor specific. To check if a counter is overflowed the upper bit of the counter is checked. Only counters where the active bit is set are checked. With this patch throttling is enabled for AMD performance counters. This patch also reenables Linux performance counters on AMD cpus. [ Impact: re-enable perfcounters on AMD CPUs ] Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: Paul Mackerras <paulus@samba.org> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1241002046-8832-25-git-send-email-robert.richter@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf_counter, x86: change and remove pmu initialization checksRobert Richter2009-04-291-21/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some functions are only called if the pmu was proper initialized. That initalization checks can be removed. The way to check initialization changed too. Now, the pointer to the interrupt handler is checked. If it exists the pmu is initialized. This also removes a static variable and uses struct x86_pmu as only data source for the check. [ Impact: simplify code ] Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: Paul Mackerras <paulus@samba.org> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1241002046-8832-24-git-send-email-robert.richter@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf_counter, x86: rework counter disable functionsRobert Richter2009-04-291-25/+23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | As for the enable function, this patch reworks the disable functions and introduces x86_pmu_disable_counter(). The internal function i/f in struct x86_pmu changed too. [ Impact: refactor and generalize code ] Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: Paul Mackerras <paulus@samba.org> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1241002046-8832-23-git-send-email-robert.richter@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf_counter, x86: rework counter enable functionsRobert Richter2009-04-291-28/+24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There is vendor specific code in generic x86 code, and there is vendor specific code that could be generic. This patch introduces x86_pmu_enable_counter() for x86 generic code. Fixed counter code for Intel is moved to Intel only functions. In the end, checks and calls via function pointers were reduced to the necessary. Also, the internal function i/f changed. [ Impact: refactor and generalize code ] Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: Paul Mackerras <paulus@samba.org> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1241002046-8832-22-git-send-email-robert.richter@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf_counter, x86: consistent use of type int for counter indexRobert Richter2009-04-291-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | The type of counter index is sometimes implemented as unsigned int. This patch changes this to have a consistent usage of int. [ Impact: cleanup ] Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: Paul Mackerras <paulus@samba.org> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1241002046-8832-21-git-send-email-robert.richter@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf_counter, x86: generic use of cpuc->activeRobert Richter2009-04-291-11/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | cpuc->active will now be used to indicate an enabled counter which implies also valid pointers of cpuc->counters[]. In contrast, cpuc->used only locks the counter, but it can be still uninitialized. [ Impact: refactor and generalize code ] Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: Paul Mackerras <paulus@samba.org> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1241002046-8832-20-git-send-email-robert.richter@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf_counter, x86: rename cpuc->active_maskRobert Richter2009-04-291-5/+5
| | | | | | | | | | | | | | | | | | | | | | | | This is to have a consistent naming scheme with cpuc->used. [ Impact: cleanup ] Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: Paul Mackerras <paulus@samba.org> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1241002046-8832-19-git-send-email-robert.richter@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf_counter, x86: make x86_pmu_read() static inlineRobert Richter2009-04-291-1/+1
| | | | | | | | | | | | | | | | | | | | [ Impact: micro-optimization ] Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: Paul Mackerras <paulus@samba.org> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1241002046-8832-18-git-send-email-robert.richter@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf_counter, x86: make pmu version genericRobert Richter2009-04-291-11/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | This makes the use of the version variable generic. Also, some debug messages have been generalized. [ Impact: refactor and generalize code ] Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: Paul Mackerras <paulus@samba.org> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1241002046-8832-17-git-send-email-robert.richter@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf_counter, x86: move counter parameters to struct x86_pmuRobert Richter2009-04-291-43/+37
| | | | | | | | | | | | | | | | | | | | [ Impact: refactor and generalize code ] Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: Paul Mackerras <paulus@samba.org> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1241002046-8832-16-git-send-email-robert.richter@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf_counter, x86: make x86_pmu data a static structRobert Richter2009-04-291-25/+25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Instead of using a pointer to reference to the x86 pmu we now have one single data structure that is initialized at the beginning. This saves the pointer access when using this memory. [ Impact: micro-optimization ] Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: Paul Mackerras <paulus@samba.org> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1241002046-8832-15-git-send-email-robert.richter@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf_counter, x86: modify initialization of struct x86_pmuRobert Richter2009-04-291-11/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds an error handler and changes initialization of struct x86_pmu. No functional changes. Needed for follow-on patches. [ Impact: cleanup ] Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: Paul Mackerras <paulus@samba.org> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1241002046-8832-14-git-send-email-robert.richter@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf_counter, x86: rename intel only functionsRobert Richter2009-04-291-4/+4
| | | | | | | | | | | | | | | | | | | | [ Impact: cleanup ] Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: Paul Mackerras <paulus@samba.org> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1241002046-8832-13-git-send-email-robert.richter@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf_counter, x86: rename __hw_perf_counter_set_period into ↵Robert Richter2009-04-291-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | x86_perf_counter_set_period [ Impact: cleanup ] Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: Paul Mackerras <paulus@samba.org> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1241002046-8832-12-git-send-email-robert.richter@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf_counter, x86: remove ack_status() from struct x86_pmuRobert Richter2009-04-291-17/+2
| | | | | | | | | | | | | | | | | | | | | | | | This function is Intel only and not necessary for AMD cpus. [ Impact: simplify code ] Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: Paul Mackerras <paulus@samba.org> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1241002046-8832-11-git-send-email-robert.richter@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf_counter, x86: remove get_status() from struct x86_pmuRobert Richter2009-04-291-34/+5
| | | | | | | | | | | | | | | | | | | | | | | | This function is Intel only and not necessary for AMD cpus. [ Impact: simplify code ] Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: Paul Mackerras <paulus@samba.org> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1241002046-8832-10-git-send-email-robert.richter@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf_counter, x86: make interrupt handler model specificRobert Richter2009-04-291-3/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | This separates the perfcounter interrupt handler for AMD and Intel cpus. The AMD interrupt handler implementation is a follow-on patch. [ Impact: refactor and clean up code ] Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: Paul Mackerras <paulus@samba.org> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1241002046-8832-9-git-send-email-robert.richter@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf_counter, x86: rename struct pmc_x86_ops into struct x86_pmuRobert Richter2009-04-291-67/+68
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch renames struct pmc_x86_ops into struct x86_pmu. It introduces a structure to describe an x86 model specific pmu (performance monitoring unit). It may contain ops and data. The new name of the structure fits better, is shorter, and thus better to handle. Where it was appropriate, names of function and variable have been changed too. [ Impact: cleanup ] Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: Paul Mackerras <paulus@samba.org> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1241002046-8832-8-git-send-email-robert.richter@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perfcounters: rename struct hw_perf_counter_ops into struct pmuRobert Richter2009-04-291-19/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch renames struct hw_perf_counter_ops into struct pmu. It introduces a structure to describe a cpu specific pmu (performance monitoring unit). It may contain ops and data. The new name of the structure fits better, is shorter, and thus better to handle. Where it was appropriate, names of function and variable have been changed too. [ Impact: cleanup ] Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: Paul Mackerras <paulus@samba.org> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1241002046-8832-7-git-send-email-robert.richter@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf_counter, x86: protect per-cpu variables with compile barriers onlyRobert Richter2009-04-291-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Per-cpu variables needn't to be protected with cpu barriers (smp_wmb()). Protection is only needed for preemption on the same cpu (rescheduling or the nmi handler). This can be done using a compiler barrier only. [ Impact: micro-optimization ] Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: Paul Mackerras <paulus@samba.org> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1241002046-8832-6-git-send-email-robert.richter@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf_counter, x86: rework pmc_amd_save_disable_all() and pmc_amd_restore_all()Robert Richter2009-04-291-10/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | MSR reads and writes are expensive. This patch adds checks to avoid its usage where possible. [ Impact: micro-optimization on AMD CPUs ] Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: Paul Mackerras <paulus@samba.org> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1241002046-8832-5-git-send-email-robert.richter@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf_counter, x86: add default path to cpu detectionRobert Richter2009-04-291-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | This quits hw counter initialization immediately if no cpu is detected. [ Impact: cleanup ] Signed-off-by: Robert Richter <robert.richter@amd.com> Cc: Paul Mackerras <paulus@samba.org> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1241002046-8832-4-git-send-email-robert.richter@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | perf_counter, x86: remove X86_FEATURE_ARCH_PERFMON flag for AMD cpusRobert Richter2009-04-292-7/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | X86_FEATURE_ARCH_PERFMON is an Intel hardware feature that does not work on AMD CPUs. The flag is now only used in Intel specific code (especially initialization). [ Impact: refactor code ] Signed-off-by: Robert Richter <robert.richter@amd.com> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <1241002046-8832-2-git-send-email-robert.richter@amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | Merge branch 'linus' into perfcounters/coreIngo Molnar2009-04-2971-514/+736
|\| | | | | | | | | | | | | Merge reason: This brach was on -rc1, refresh it to almost-rc4 to pick up the latest upstream fixes. Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * Merge branch 'for-linus' of ↵Linus Torvalds2009-04-275-6/+17
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6: PCI: only save/restore existent registers in the PCIe capability x86/PCI: don't bother with root quirks if _CRS is used docbooks: add/fix PCI kernel-doc PCI: cleanup debug output resources x86/PCI: set_pci_bus_resources_arch_default cleanups x86/PCI: Move set_pci_bus_resources_arch_default into arch/x86 x86/PCI: don't call e820_all_mapped with -1 in the mmconfig case PCI quirk: disable MSI on VIA VT3364 chipsets
| | * x86/PCI: don't bother with root quirks if _CRS is usedYinghai Lu2009-04-221-0/+4
| | | | | | | | | | | | | | | | | | | | | It will be overwriten later if _CRS is used, so don't bother to set it. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
| | * x86/PCI: set_pci_bus_resources_arch_default cleanupsYinghai Lu2009-04-224-7/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Rename set_pci_bus_resources_arch_default to x86_pci_root_bus_res_quirks, move the weak version from common.c to i386.c, and before calling, make sure it's a root bus. Reviewed-by: Matthew Wilcox <willy@linux.intel.com> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
generated by cgit v1.2.3 (git 2.25.1) at 2025-01-28 02:59:12 +0000