cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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tick-legacy.c (999B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 * Timer tick function for architectures that lack generic clockevents,
      4 * consolidated here from m68k/ia64/parisc/arm.
      5 */
      6
      7#include <linux/irq.h>
      8#include <linux/profile.h>
      9#include <linux/timekeeper_internal.h>
     10
     11#include "tick-internal.h"
     12
     13/**
     14 * legacy_timer_tick() - advances the timekeeping infrastructure
     15 * @ticks:	number of ticks, that have elapsed since the last call.
     16 *
     17 * This is used by platforms that have not been converted to
     18 * generic clockevents.
     19 *
     20 * If 'ticks' is zero, the CPU is not handling timekeeping, so
     21 * only perform process accounting and profiling.
     22 *
     23 * Must be called with interrupts disabled.
     24 */
     25void legacy_timer_tick(unsigned long ticks)
     26{
     27	if (ticks) {
     28		raw_spin_lock(&jiffies_lock);
     29		write_seqcount_begin(&jiffies_seq);
     30		do_timer(ticks);
     31		write_seqcount_end(&jiffies_seq);
     32		raw_spin_unlock(&jiffies_lock);
     33		update_wall_time();
     34	}
     35	update_process_times(user_mode(get_irq_regs()));
     36	profile_tick(CPU_PROFILING);
     37}