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| 1 | +// SPDX-License-Identifier: GPL-2.0-or-later |
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1 | 2 | /* |
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2 | 3 | * Performance event support - Freescale Embedded Performance Monitor |
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3 | 4 | * |
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4 | 5 | * Copyright 2008-2009 Paul Mackerras, IBM Corporation. |
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5 | 6 | * Copyright 2010 Freescale Semiconductor, Inc. |
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6 | | - * |
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7 | | - * This program is free software; you can redistribute it and/or |
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8 | | - * modify it under the terms of the GNU General Public License |
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9 | | - * as published by the Free Software Foundation; either version |
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10 | | - * 2 of the License, or (at your option) any later version. |
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11 | 7 | */ |
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12 | 8 | #include <linux/kernel.h> |
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13 | 9 | #include <linux/sched.h> |
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.. | .. |
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34 | 30 | static atomic_t num_events; |
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35 | 31 | /* Used to avoid races in calling reserve/release_pmc_hardware */ |
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36 | 32 | static DEFINE_MUTEX(pmc_reserve_mutex); |
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37 | | - |
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38 | | -/* |
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39 | | - * If interrupts were soft-disabled when a PMU interrupt occurs, treat |
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40 | | - * it as an NMI. |
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41 | | - */ |
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42 | | -static inline int perf_intr_is_nmi(struct pt_regs *regs) |
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43 | | -{ |
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44 | | -#ifdef __powerpc64__ |
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45 | | - return (regs->softe & IRQS_DISABLED); |
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46 | | -#else |
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47 | | - return 0; |
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48 | | -#endif |
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49 | | -} |
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50 | 33 | |
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51 | 34 | static void perf_event_interrupt(struct pt_regs *regs); |
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52 | 35 | |
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.. | .. |
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663 | 646 | struct perf_event *event; |
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664 | 647 | unsigned long val; |
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665 | 648 | int found = 0; |
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666 | | - int nmi; |
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667 | | - |
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668 | | - nmi = perf_intr_is_nmi(regs); |
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669 | | - if (nmi) |
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670 | | - nmi_enter(); |
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671 | | - else |
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672 | | - irq_enter(); |
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673 | 649 | |
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674 | 650 | for (i = 0; i < ppmu->n_counter; ++i) { |
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675 | 651 | event = cpuhw->event[i]; |
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.. | .. |
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694 | 670 | mtmsr(mfmsr() | MSR_PMM); |
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695 | 671 | mtpmr(PMRN_PMGC0, PMGC0_PMIE | PMGC0_FCECE); |
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696 | 672 | isync(); |
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697 | | - |
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698 | | - if (nmi) |
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699 | | - nmi_exit(); |
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700 | | - else |
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701 | | - irq_exit(); |
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702 | 673 | } |
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703 | 674 | |
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704 | 675 | void hw_perf_event_setup(int cpu) |
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