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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uncore-frequency-common.h (2403B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2/*
      3 * Intel Uncore Frequency Control: Common defines and prototypes
      4 * Copyright (c) 2022, Intel Corporation.
      5 * All rights reserved.
      6 *
      7 */
      8
      9#ifndef __INTEL_UNCORE_FREQ_COMMON_H
     10#define __INTEL_UNCORE_FREQ_COMMON_H
     11
     12#include <linux/device.h>
     13
     14/**
     15 * struct uncore_data - Encapsulate all uncore data
     16 * @stored_uncore_data: Last user changed MSR 620 value, which will be restored
     17 *			on system resume.
     18 * @initial_min_freq_khz: Sampled minimum uncore frequency at driver init
     19 * @initial_max_freq_khz: Sampled maximum uncore frequency at driver init
     20 * @control_cpu:	Designated CPU for a die to read/write
     21 * @valid:		Mark the data valid/invalid
     22 * @package_id:	Package id for this instance
     23 * @die_id:		Die id for this instance
     24 * @name:		Sysfs entry name for this instance
     25 * @uncore_attr_group:	Attribute group storage
     26 * @max_freq_khz_dev_attr: Storage for device attribute max_freq_khz
     27 * @mix_freq_khz_dev_attr: Storage for device attribute min_freq_khz
     28 * @initial_max_freq_khz_dev_attr: Storage for device attribute initial_max_freq_khz
     29 * @initial_min_freq_khz_dev_attr: Storage for device attribute initial_min_freq_khz
     30 * @current_freq_khz_dev_attr: Storage for device attribute current_freq_khz
     31 * @uncore_attrs:	Attribute storage for group creation
     32 *
     33 * This structure is used to encapsulate all data related to uncore sysfs
     34 * settings for a die/package.
     35 */
     36struct uncore_data {
     37	u64 stored_uncore_data;
     38	u32 initial_min_freq_khz;
     39	u32 initial_max_freq_khz;
     40	int control_cpu;
     41	bool valid;
     42	int package_id;
     43	int die_id;
     44	char name[32];
     45
     46	struct attribute_group uncore_attr_group;
     47	struct device_attribute max_freq_khz_dev_attr;
     48	struct device_attribute min_freq_khz_dev_attr;
     49	struct device_attribute initial_max_freq_khz_dev_attr;
     50	struct device_attribute initial_min_freq_khz_dev_attr;
     51	struct device_attribute current_freq_khz_dev_attr;
     52	struct attribute *uncore_attrs[6];
     53};
     54
     55int uncore_freq_common_init(int (*read_control_freq)(struct uncore_data *data, unsigned int *min, unsigned int *max),
     56			     int (*write_control_freq)(struct uncore_data *data, unsigned int input, unsigned int min_max),
     57			     int (*uncore_read_freq)(struct uncore_data *data, unsigned int *freq));
     58void uncore_freq_common_exit(void);
     59int uncore_freq_add_entry(struct uncore_data *data, int cpu);
     60void uncore_freq_remove_die_entry(struct uncore_data *data);
     61
     62#endif