Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright (C) 2025 Arm Ltd.
4 * Based on arch/x86/kernel/cpu/resctrl/internal.h
5 */
6
7#ifndef __LINUX_RESCTRL_TYPES_H
8#define __LINUX_RESCTRL_TYPES_H
9
10#define MAX_MBA_BW 100u
11#define MBM_OVERFLOW_INTERVAL 1000
12
13/* Reads to Local DRAM Memory */
14#define READS_TO_LOCAL_MEM BIT(0)
15
16/* Reads to Remote DRAM Memory */
17#define READS_TO_REMOTE_MEM BIT(1)
18
19/* Non-Temporal Writes to Local Memory */
20#define NON_TEMP_WRITE_TO_LOCAL_MEM BIT(2)
21
22/* Non-Temporal Writes to Remote Memory */
23#define NON_TEMP_WRITE_TO_REMOTE_MEM BIT(3)
24
25/* Reads to Local Memory the system identifies as "Slow Memory" */
26#define READS_TO_LOCAL_S_MEM BIT(4)
27
28/* Reads to Remote Memory the system identifies as "Slow Memory" */
29#define READS_TO_REMOTE_S_MEM BIT(5)
30
31/* Dirty Victims to All Types of Memory */
32#define DIRTY_VICTIMS_TO_ALL_MEM BIT(6)
33
34/* Max event bits supported */
35#define MAX_EVT_CONFIG_BITS GENMASK(6, 0)
36
37/* Number of memory transactions that an MBM event can be configured with */
38#define NUM_MBM_TRANSACTIONS 7
39
40/* Event IDs */
41enum resctrl_event_id {
42 /* Must match value of first event below */
43 QOS_FIRST_EVENT = 0x01,
44
45 /*
46 * These values match those used to program IA32_QM_EVTSEL before
47 * reading IA32_QM_CTR on RDT systems.
48 */
49 QOS_L3_OCCUP_EVENT_ID = 0x01,
50 QOS_L3_MBM_TOTAL_EVENT_ID = 0x02,
51 QOS_L3_MBM_LOCAL_EVENT_ID = 0x03,
52
53 /* Must be the last */
54 QOS_NUM_EVENTS,
55};
56
57#define QOS_NUM_L3_MBM_EVENTS (QOS_L3_MBM_LOCAL_EVENT_ID - QOS_L3_MBM_TOTAL_EVENT_ID + 1)
58#define MBM_STATE_IDX(evt) ((evt) - QOS_L3_MBM_TOTAL_EVENT_ID)
59
60#endif /* __LINUX_RESCTRL_TYPES_H */