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6017608936
Add Icelake core PMU perf code, including constraint tables and the main enable code. Icelake expanded the generic counters to always 8 even with HT on, but a range of events cannot be scheduled on the extra 4 counters. Add new constraint ranges to describe this to the scheduler. The number of constraints that need to be checked is larger now than with earlier CPUs. At some point we may need a new data structure to look them up more efficiently than with linear search. So far it still seems to be acceptable however. Icelake added a new fixed counter SLOTS. Full support for it is added later in the patch series. The cache events table is identical to Skylake. Compare to PEBS instruction event on generic counter, fixed counter 0 has less skid. Force instruction:ppp always in fixed counter 0. Originally-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Kan Liang <kan.liang@linux.intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: acme@kernel.org Cc: jolsa@kernel.org Link: https://lkml.kernel.org/r/20190402194509.2832-9-kan.liang@linux.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
37 lines
849 B
C
37 lines
849 B
C
#ifndef _ASM_INTEL_DS_H
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#define _ASM_INTEL_DS_H
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#include <linux/percpu-defs.h>
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#define BTS_BUFFER_SIZE (PAGE_SIZE << 4)
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#define PEBS_BUFFER_SIZE (PAGE_SIZE << 4)
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/* The maximal number of PEBS events: */
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#define MAX_PEBS_EVENTS 8
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#define MAX_FIXED_PEBS_EVENTS 4
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/*
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* A debug store configuration.
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*
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* We only support architectures that use 64bit fields.
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*/
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struct debug_store {
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u64 bts_buffer_base;
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u64 bts_index;
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u64 bts_absolute_maximum;
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u64 bts_interrupt_threshold;
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u64 pebs_buffer_base;
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u64 pebs_index;
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u64 pebs_absolute_maximum;
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u64 pebs_interrupt_threshold;
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u64 pebs_event_reset[MAX_PEBS_EVENTS + MAX_FIXED_PEBS_EVENTS];
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} __aligned(PAGE_SIZE);
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DECLARE_PER_CPU_PAGE_ALIGNED(struct debug_store, cpu_debug_store);
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struct debug_store_buffers {
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char bts_buffer[BTS_BUFFER_SIZE];
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char pebs_buffer[PEBS_BUFFER_SIZE];
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};
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#endif
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