cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
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cpu-throttle.h (1942B)

      1/*
      2 * Copyright (c) 2012 SUSE LINUX Products GmbH
      3 *
      4 * This program is free software; you can redistribute it and/or
      5 * modify it under the terms of the GNU General Public License
      6 * as published by the Free Software Foundation; either version 2
      7 * of the License, or (at your option) any later version.
      8 *
      9 * This program is distributed in the hope that it will be useful,
     10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
     11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     12 * GNU General Public License for more details.
     13 *
     14 * You should have received a copy of the GNU General Public License
     15 * along with this program; if not, see
     16 * <http://www.gnu.org/licenses/gpl-2.0.html>
     17 */
     18
     19#ifndef SYSEMU_CPU_THROTTLE_H
     20#define SYSEMU_CPU_THROTTLE_H
     21
     22#include "qemu/timer.h"
     23
     24/**
     25 * cpu_throttle_init:
     26 *
     27 * Initialize the CPU throttling API.
     28 */
     29void cpu_throttle_init(void);
     30
     31/**
     32 * cpu_throttle_set:
     33 * @new_throttle_pct: Percent of sleep time. Valid range is 1 to 99.
     34 *
     35 * Throttles all vcpus by forcing them to sleep for the given percentage of
     36 * time. A throttle_percentage of 25 corresponds to a 75% duty cycle roughly.
     37 * (example: 10ms sleep for every 30ms awake).
     38 *
     39 * cpu_throttle_set can be called as needed to adjust new_throttle_pct.
     40 * Once the throttling starts, it will remain in effect until cpu_throttle_stop
     41 * is called.
     42 */
     43void cpu_throttle_set(int new_throttle_pct);
     44
     45/**
     46 * cpu_throttle_stop:
     47 *
     48 * Stops the vcpu throttling started by cpu_throttle_set.
     49 */
     50void cpu_throttle_stop(void);
     51
     52/**
     53 * cpu_throttle_active:
     54 *
     55 * Returns: %true if the vcpus are currently being throttled, %false otherwise.
     56 */
     57bool cpu_throttle_active(void);
     58
     59/**
     60 * cpu_throttle_get_percentage:
     61 *
     62 * Returns the vcpu throttle percentage. See cpu_throttle_set for details.
     63 *
     64 * Returns: The throttle percentage in range 1 to 99.
     65 */
     66int cpu_throttle_get_percentage(void);
     67
     68#endif /* SYSEMU_CPU_THROTTLE_H */