99 lines
3.1 KiB
C
99 lines
3.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* Copyright (C) 2025 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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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, /* Caches, e.g. L2, L3 */
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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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#define MPAM_CLASS_ID_DEFAULT 255
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#ifdef CONFIG_ACPI_MPAM
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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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#ifdef CONFIG_ARM64_MPAM_DRIVER
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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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#else
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static inline int mpam_ris_create(struct mpam_msc *msc, u8 ris_idx,
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enum mpam_class_types type, u8 class_id,
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int component_id)
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{
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return -EINVAL;
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}
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#endif
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bool resctrl_arch_alloc_capable(void);
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bool resctrl_arch_mon_capable(void);
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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 rmid);
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void resctrl_arch_sched_in(struct task_struct *tsk);
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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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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, enum resctrl_event_id evtid);
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void resctrl_arch_mon_ctx_free(struct rdt_resource *r, enum resctrl_event_id evtid, void *ctx);
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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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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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/**
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* mpam_register_requestor() - Register a requestor with the MPAM driver
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* @partid_max: The maximum PARTID value the requestor can generate.
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* @pmg_max: The maximum PMG value the requestor can generate.
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*
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* Registers a requestor with the MPAM driver to ensure the chosen system-wide
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* minimum PARTID and PMG values will allow the requestors features to be used.
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*
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* Returns an error if the registration is too late, and a larger PARTID/PMG
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* value has been advertised to user-space. In this case the requestor should
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* not use its MPAM features. Returns 0 on success.
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*/
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int mpam_register_requestor(u16 partid_max, u8 pmg_max);
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#endif /* __LINUX_ARM_MPAM_H */
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