106 lines
3.6 KiB
C
106 lines
3.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
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// Copyright (C) 2021 Arm Ltd.
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#ifndef __LINUX_ARM_MPAM_H
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#define __LINUX_ARM_MPAM_H
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#include <linux/acpi.h>
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#include <linux/resctrl_types.h>
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#include <linux/types.h>
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/*
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* The value of the MPAM1_EL1 sysreg when a task is in the default group.
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* This is used by the context switch code to use the resctrl CPU property
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* instead. The value is modified when CDP is enabled/disabled by mounting
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* the resctrl filesystem.
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*/
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extern u64 mpam_resctrl_default_group;
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#include <asm/mpam.h>
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struct mpam_msc;
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enum mpam_msc_iface {
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MPAM_IFACE_MMIO, /* a real MPAM MSC */
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MPAM_IFACE_PCC, /* a fake MPAM MSC */
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};
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enum mpam_class_types {
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MPAM_CLASS_CACHE, /* Well known caches, e.g. L2 */
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MPAM_CLASS_MEMORY, /* Main memory */
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MPAM_CLASS_UNKNOWN, /* Everything else, e.g. SMMU */
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};
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#ifdef CONFIG_ACPI_MPAM
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/* Parse the ACPI description of resources entries for this MSC. */
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int acpi_mpam_parse_resources(struct mpam_msc *msc,
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struct acpi_mpam_msc_node *tbl_msc);
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int acpi_mpam_count_msc(void);
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#else
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static inline int acpi_mpam_parse_resources(struct mpam_msc *msc,
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struct acpi_mpam_msc_node *tbl_msc)
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{
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return -EINVAL;
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}
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static inline int acpi_mpam_count_msc(void) { return -EINVAL; }
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#endif
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int mpam_register_requestor(u16 partid_max, u8 pmg_max);
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int mpam_ris_create(struct mpam_msc *msc, u8 ris_idx,
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enum mpam_class_types type, u8 class_id, int component_id);
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static inline unsigned int resctrl_arch_round_mon_val(unsigned int val)
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{
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return val;
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}
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/* MPAM counters requires a monitor to be allocated */
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static inline bool resctrl_arch_event_is_free_running(enum resctrl_event_id evt)
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{
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return false;
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}
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bool resctrl_arch_alloc_capable(void);
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bool resctrl_arch_mon_capable(void);
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bool resctrl_arch_is_llc_occupancy_enabled(void);
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bool resctrl_arch_is_mbm_local_enabled(void);
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bool resctrl_arch_is_mbm_total_enabled(void);
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/* reset cached configurations, then all devices */
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void resctrl_arch_reset_resources(void);
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bool resctrl_arch_get_cdp_enabled(enum resctrl_res_level ignored);
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int resctrl_arch_set_cdp_enabled(enum resctrl_res_level ignored, bool enable);
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bool resctrl_arch_match_closid(struct task_struct *tsk, u32 closid);
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bool resctrl_arch_match_rmid(struct task_struct *tsk, u32 closid, u32 rmid);
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void resctrl_arch_set_cpu_default_closid(int cpu, u32 closid);
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void resctrl_arch_set_closid_rmid(struct task_struct *tsk, u32 closid, u32 rmid);
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void resctrl_arch_set_cpu_default_closid_rmid(int cpu, u32 closid, u32 pmg);
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void resctrl_sched_in(struct task_struct *tsk);
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u32 resctrl_arch_rmid_idx_encode(u32 closid, u32 rmid);
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void resctrl_arch_rmid_idx_decode(u32 idx, u32 *closid, u32 *rmid);
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u32 resctrl_arch_system_num_rmid_idx(void);
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struct rdt_resource;
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void *resctrl_arch_mon_ctx_alloc(struct rdt_resource *r, int evtid);
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void resctrl_arch_mon_ctx_free(struct rdt_resource *r, int evtid, void *ctx);
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/* Pseudo lock is not supported by MPAM */
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static inline int resctrl_arch_pseudo_lock_fn(void *_plr) { return 0; }
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static inline int resctrl_arch_measure_l2_residency(void *_plr) { return 0; }
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static inline int resctrl_arch_measure_l3_residency(void *_plr) { return 0; }
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static inline int resctrl_arch_measure_cycles_lat_fn(void *_plr) { return 0; }
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static inline u64 resctrl_arch_get_prefetch_disable_bits(void) { return 0; }
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/*
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* The CPU configuration for MPAM is cheap to write, and is only written if it
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* has changed. No need for fine grained enables.
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*/
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static inline void resctrl_arch_enable_mon(void) { }
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static inline void resctrl_arch_disable_mon(void) { }
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static inline void resctrl_arch_enable_alloc(void) { }
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static inline void resctrl_arch_disable_alloc(void) { }
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#endif /* __LINUX_ARM_MPAM_H */
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