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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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C
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899/* SPDX-License-Identifier: GPL-2.0 *//* Copyright (C) 2025 Arm Ltd. */
#ifndef __LINUX_ARM_MPAM_H#define __LINUX_ARM_MPAM_H
#include <linux/acpi.h>#include <linux/resctrl_types.h>#include <linux/types.h>
struct mpam_msc;
enum mpam_msc_iface { MPAM_IFACE_MMIO, /* a real MPAM MSC */ MPAM_IFACE_PCC, /* a fake MPAM MSC */};
enum mpam_class_types { MPAM_CLASS_CACHE, /* Caches, e.g. L2, L3 */ MPAM_CLASS_MEMORY, /* Main memory */ MPAM_CLASS_UNKNOWN, /* Everything else, e.g. SMMU */};
#define MPAM_CLASS_ID_DEFAULT 255
#ifdef CONFIG_ACPI_MPAMint acpi_mpam_parse_resources(struct mpam_msc *msc, struct acpi_mpam_msc_node *tbl_msc);
int acpi_mpam_count_msc(void);#elsestatic inline int acpi_mpam_parse_resources(struct mpam_msc *msc, struct acpi_mpam_msc_node *tbl_msc){ return -EINVAL;}
static inline int acpi_mpam_count_msc(void) { return -EINVAL; }#endif
#ifdef CONFIG_ARM64_MPAM_DRIVERint mpam_ris_create(struct mpam_msc *msc, u8 ris_idx, enum mpam_class_types type, u8 class_id, int component_id);#elsestatic inline int mpam_ris_create(struct mpam_msc *msc, u8 ris_idx, enum mpam_class_types type, u8 class_id, int component_id){ return -EINVAL;}#endif
bool resctrl_arch_alloc_capable(void);bool resctrl_arch_mon_capable(void);
void resctrl_arch_set_cpu_default_closid(int cpu, u32 closid);void resctrl_arch_set_closid_rmid(struct task_struct *tsk, u32 closid, u32 rmid);void resctrl_arch_set_cpu_default_closid_rmid(int cpu, u32 closid, u32 rmid);void resctrl_arch_sched_in(struct task_struct *tsk);bool resctrl_arch_match_closid(struct task_struct *tsk, u32 closid);bool resctrl_arch_match_rmid(struct task_struct *tsk, u32 closid, u32 rmid);u32 resctrl_arch_rmid_idx_encode(u32 closid, u32 rmid);void resctrl_arch_rmid_idx_decode(u32 idx, u32 *closid, u32 *rmid);u32 resctrl_arch_system_num_rmid_idx(void);
struct rdt_resource;void *resctrl_arch_mon_ctx_alloc(struct rdt_resource *r, enum resctrl_event_id evtid);void resctrl_arch_mon_ctx_free(struct rdt_resource *r, enum resctrl_event_id evtid, void *ctx);
/* * The CPU configuration for MPAM is cheap to write, and is only written if it * has changed. No need for fine grained enables. */static inline void resctrl_arch_enable_mon(void) { }static inline void resctrl_arch_disable_mon(void) { }static inline void resctrl_arch_enable_alloc(void) { }static inline void resctrl_arch_disable_alloc(void) { }
static inline unsigned int resctrl_arch_round_mon_val(unsigned int val){ return val;}
/** * mpam_register_requestor() - Register a requestor with the MPAM driver * @partid_max: The maximum PARTID value the requestor can generate. * @pmg_max: The maximum PMG value the requestor can generate. * * Registers a requestor with the MPAM driver to ensure the chosen system-wide * minimum PARTID and PMG values will allow the requestors features to be used. * * Returns an error if the registration is too late, and a larger PARTID/PMG * value has been advertised to user-space. In this case the requestor should * not use its MPAM features. Returns 0 on success. */int mpam_register_requestor(u16 partid_max, u8 pmg_max);
#endif /* __LINUX_ARM_MPAM_H */