/* SPDX-License-Identifier: GPL-2.0 */ /* * include/linux/memory.h - generic memory definition * * This is mainly for topological representation. We define the * basic "struct memory_block" here, which can be embedded in per-arch * definitions or NUMA information. * * Basic handling of the devices is done in drivers/base/memory.c * and system devices are handled in drivers/base/sys.c. * * Memory block are exported via sysfs in the class/memory/devices/ * directory. *
*/ #ifndef _LINUX_MEMORY_H_ #define _LINUX_MEMORY_H_
/** * struct memory_group - a logical group of memory blocks * @nid: The node id for all memory blocks inside the memory group. * @memory_blocks: List of all memory blocks belonging to this memory group. * @present_kernel_pages: Present (online) memory outside ZONE_MOVABLE of this * memory group. * @present_movable_pages: Present (online) memory in ZONE_MOVABLE of this * memory group. * @is_dynamic: The memory group type: static vs. dynamic * @s.max_pages: Valid with &memory_group.is_dynamic == false. The maximum * number of pages we'll have in this static memory group. * @d.unit_pages: Valid with &memory_group.is_dynamic == true. Unit in pages * in which memory is added/removed in this dynamic memory group. * This granularity defines the alignment of a unit in physical * address space; it has to be at least as big as a single * memory block. * * A memory group logically groups memory blocks; each memory block * belongs to at most one memory group. A memory group corresponds to * a memory device, such as a DIMM or a NUMA node, which spans multiple * memory blocks and might even span multiple non-contiguous physical memory * ranges. * * Modification of members after registration is serialized by memory * hot(un)plug code.
*/ struct memory_group { int nid; struct list_head memory_blocks; unsignedlong present_kernel_pages; unsignedlong present_movable_pages; bool is_dynamic; union { struct { unsignedlong max_pages;
} s; struct { unsignedlong unit_pages;
} d;
};
};
struct memory_block { unsignedlong start_section_nr; unsignedlong state; /* serialized by the dev->lock */ int online_type; /* for passing data to online routine */ int nid; /* NID for this memory block */ /* * The single zone of this memory block if all PFNs of this memory block * that are System RAM (not a memory hole, not ZONE_DEVICE ranges) are * managed by a single zone. NULL if multiple zones (including nodes) * apply.
*/ struct zone *zone; struct device dev; struct vmem_altmap *altmap; struct memory_group *group; /* group (if any) for this block */ struct list_head group_next; /* next block inside memory group */ #ifdefined(CONFIG_MEMORY_FAILURE) && defined(CONFIG_MEMORY_HOTPLUG)
atomic_long_t nr_hwpoison; #endif
};
int arch_get_memory_phys_device(unsignedlong start_pfn); unsignedlong memory_block_size_bytes(void); int set_memory_block_size_order(unsignedint order);
/* These states are exposed to userspace as text strings in sysfs */ #define MEM_ONLINE (1<<0) /* exposed to userspace */ #define MEM_GOING_OFFLINE (1<<1) /* exposed to userspace */ #define MEM_OFFLINE (1<<2) /* exposed to userspace */ #define MEM_GOING_ONLINE (1<<3) #define MEM_CANCEL_ONLINE (1<<4) #define MEM_CANCEL_OFFLINE (1<<5) #define MEM_PREPARE_ONLINE (1<<6) #define MEM_FINISH_OFFLINE (1<<7)
struct memory_notify { /* * The altmap_start_pfn and altmap_nr_pages fields are designated for * specifying the altmap range and are exclusively intended for use in * MEM_PREPARE_ONLINE/MEM_FINISH_OFFLINE notifiers.
*/ unsignedlong altmap_start_pfn; unsignedlong altmap_nr_pages; unsignedlong start_pfn; unsignedlong nr_pages;
};
struct notifier_block; struct mem_section;
/* * Priorities for the hotplug memory callback routines (stored in decreasing * order in the callback chain)
*/ #define DEFAULT_CALLBACK_PRI 0 #define SLAB_CALLBACK_PRI 1 #define HMAT_CALLBACK_PRI 2 #define CXL_CALLBACK_PRI 5 #define MM_COMPUTE_BATCH_PRI 10 #define CPUSET_CALLBACK_PRI 10 #define MEMTIER_HOTPLUG_PRI 100 #define KSM_CALLBACK_PRI 100
Die Informationen auf dieser Webseite wurden
nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit,
noch Qualität der bereit gestellten Informationen zugesichert.
Bemerkung:
Die farbliche Syntaxdarstellung ist noch experimentell.