12874c5fdSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-or-later 295f72d1eSYinghai Lu /* 395f72d1eSYinghai Lu * Procedures for maintaining information about logical memory blocks. 495f72d1eSYinghai Lu * 595f72d1eSYinghai Lu * Peter Bergner, IBM Corp. June 2001. 695f72d1eSYinghai Lu * Copyright (C) 2001 Peter Bergner. 795f72d1eSYinghai Lu */ 895f72d1eSYinghai Lu 995f72d1eSYinghai Lu #include <linux/kernel.h> 10142b45a7SBenjamin Herrenschmidt #include <linux/slab.h> 1195f72d1eSYinghai Lu #include <linux/init.h> 1295f72d1eSYinghai Lu #include <linux/bitops.h> 13449e8df3SBenjamin Herrenschmidt #include <linux/poison.h> 14c196f76fSBenjamin Herrenschmidt #include <linux/pfn.h> 156d03b885SBenjamin Herrenschmidt #include <linux/debugfs.h> 16514c6032SRandy Dunlap #include <linux/kmemleak.h> 176d03b885SBenjamin Herrenschmidt #include <linux/seq_file.h> 1895f72d1eSYinghai Lu #include <linux/memblock.h> 1995f72d1eSYinghai Lu 20c4c5ad6bSChristoph Hellwig #include <asm/sections.h> 2126f09e9bSSantosh Shilimkar #include <linux/io.h> 2226f09e9bSSantosh Shilimkar 2326f09e9bSSantosh Shilimkar #include "internal.h" 2479442ed1STang Chen 258a5b403dSArd Biesheuvel #define INIT_MEMBLOCK_REGIONS 128 268a5b403dSArd Biesheuvel #define INIT_PHYSMEM_REGIONS 4 278a5b403dSArd Biesheuvel 288a5b403dSArd Biesheuvel #ifndef INIT_MEMBLOCK_RESERVED_REGIONS 298a5b403dSArd Biesheuvel # define INIT_MEMBLOCK_RESERVED_REGIONS INIT_MEMBLOCK_REGIONS 308a5b403dSArd Biesheuvel #endif 318a5b403dSArd Biesheuvel 32450d0e74SZhou Guanghui #ifndef INIT_MEMBLOCK_MEMORY_REGIONS 33450d0e74SZhou Guanghui #define INIT_MEMBLOCK_MEMORY_REGIONS INIT_MEMBLOCK_REGIONS 34450d0e74SZhou Guanghui #endif 35450d0e74SZhou Guanghui 363e039c5cSMike Rapoport /** 373e039c5cSMike Rapoport * DOC: memblock overview 383e039c5cSMike Rapoport * 393e039c5cSMike Rapoport * Memblock is a method of managing memory regions during the early 403e039c5cSMike Rapoport * boot period when the usual kernel memory allocators are not up and 413e039c5cSMike Rapoport * running. 423e039c5cSMike Rapoport * 433e039c5cSMike Rapoport * Memblock views the system memory as collections of contiguous 443e039c5cSMike Rapoport * regions. There are several types of these collections: 453e039c5cSMike Rapoport * 463e039c5cSMike Rapoport * * ``memory`` - describes the physical memory available to the 473e039c5cSMike Rapoport * kernel; this may differ from the actual physical memory installed 483e039c5cSMike Rapoport * in the system, for instance when the memory is restricted with 493e039c5cSMike Rapoport * ``mem=`` command line parameter 503e039c5cSMike Rapoport * * ``reserved`` - describes the regions that were allocated 5177649905SDavid Hildenbrand * * ``physmem`` - describes the actual physical memory available during 5277649905SDavid Hildenbrand * boot regardless of the possible restrictions and memory hot(un)plug; 5377649905SDavid Hildenbrand * the ``physmem`` type is only available on some architectures. 543e039c5cSMike Rapoport * 559303c9d5SMauro Carvalho Chehab * Each region is represented by struct memblock_region that 563e039c5cSMike Rapoport * defines the region extents, its attributes and NUMA node id on NUMA 571bf162e4SMauro Carvalho Chehab * systems. Every memory type is described by the struct memblock_type 581bf162e4SMauro Carvalho Chehab * which contains an array of memory regions along with 5977649905SDavid Hildenbrand * the allocator metadata. The "memory" and "reserved" types are nicely 609303c9d5SMauro Carvalho Chehab * wrapped with struct memblock. This structure is statically 6177649905SDavid Hildenbrand * initialized at build time. The region arrays are initially sized to 62450d0e74SZhou Guanghui * %INIT_MEMBLOCK_MEMORY_REGIONS for "memory" and 63450d0e74SZhou Guanghui * %INIT_MEMBLOCK_RESERVED_REGIONS for "reserved". The region array 64450d0e74SZhou Guanghui * for "physmem" is initially sized to %INIT_PHYSMEM_REGIONS. 656e5af9a8SCao jin * The memblock_allow_resize() enables automatic resizing of the region 666e5af9a8SCao jin * arrays during addition of new regions. This feature should be used 676e5af9a8SCao jin * with care so that memory allocated for the region array will not 686e5af9a8SCao jin * overlap with areas that should be reserved, for example initrd. 693e039c5cSMike Rapoport * 703e039c5cSMike Rapoport * The early architecture setup should tell memblock what the physical 716e5af9a8SCao jin * memory layout is by using memblock_add() or memblock_add_node() 726e5af9a8SCao jin * functions. The first function does not assign the region to a NUMA 736e5af9a8SCao jin * node and it is appropriate for UMA systems. Yet, it is possible to 746e5af9a8SCao jin * use it on NUMA systems as well and assign the region to a NUMA node 756e5af9a8SCao jin * later in the setup process using memblock_set_node(). The 766e5af9a8SCao jin * memblock_add_node() performs such an assignment directly. 773e039c5cSMike Rapoport * 78a2974133SMike Rapoport * Once memblock is setup the memory can be allocated using one of the 79a2974133SMike Rapoport * API variants: 80a2974133SMike Rapoport * 816e5af9a8SCao jin * * memblock_phys_alloc*() - these functions return the **physical** 826e5af9a8SCao jin * address of the allocated memory 836e5af9a8SCao jin * * memblock_alloc*() - these functions return the **virtual** address 846e5af9a8SCao jin * of the allocated memory. 85a2974133SMike Rapoport * 86df1758d9SEthon Paul * Note, that both API variants use implicit assumptions about allowed 87a2974133SMike Rapoport * memory ranges and the fallback methods. Consult the documentation 886e5af9a8SCao jin * of memblock_alloc_internal() and memblock_alloc_range_nid() 896e5af9a8SCao jin * functions for more elaborate description. 903e039c5cSMike Rapoport * 916e5af9a8SCao jin * As the system boot progresses, the architecture specific mem_init() 926e5af9a8SCao jin * function frees all the memory to the buddy page allocator. 933e039c5cSMike Rapoport * 946e5af9a8SCao jin * Unless an architecture enables %CONFIG_ARCH_KEEP_MEMBLOCK, the 9577649905SDavid Hildenbrand * memblock data structures (except "physmem") will be discarded after the 9677649905SDavid Hildenbrand * system initialization completes. 973e039c5cSMike Rapoport */ 983e039c5cSMike Rapoport 99a9ee6cf5SMike Rapoport #ifndef CONFIG_NUMA 100bda49a81SMike Rapoport struct pglist_data __refdata contig_page_data; 101bda49a81SMike Rapoport EXPORT_SYMBOL(contig_page_data); 102bda49a81SMike Rapoport #endif 103bda49a81SMike Rapoport 104bda49a81SMike Rapoport unsigned long max_low_pfn; 105bda49a81SMike Rapoport unsigned long min_low_pfn; 106bda49a81SMike Rapoport unsigned long max_pfn; 107bda49a81SMike Rapoport unsigned long long max_possible_pfn; 108bda49a81SMike Rapoport 109450d0e74SZhou Guanghui static struct memblock_region memblock_memory_init_regions[INIT_MEMBLOCK_MEMORY_REGIONS] __initdata_memblock; 1108a5b403dSArd Biesheuvel static struct memblock_region memblock_reserved_init_regions[INIT_MEMBLOCK_RESERVED_REGIONS] __initdata_memblock; 11170210ed9SPhilipp Hachtmann #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP 11277649905SDavid Hildenbrand static struct memblock_region memblock_physmem_init_regions[INIT_PHYSMEM_REGIONS]; 11370210ed9SPhilipp Hachtmann #endif 114fe091c20STejun Heo 115fe091c20STejun Heo struct memblock memblock __initdata_memblock = { 116fe091c20STejun Heo .memory.regions = memblock_memory_init_regions, 117fe091c20STejun Heo .memory.cnt = 1, /* empty dummy entry */ 118450d0e74SZhou Guanghui .memory.max = INIT_MEMBLOCK_MEMORY_REGIONS, 1190262d9c8SHeiko Carstens .memory.name = "memory", 120fe091c20STejun Heo 121fe091c20STejun Heo .reserved.regions = memblock_reserved_init_regions, 122fe091c20STejun Heo .reserved.cnt = 1, /* empty dummy entry */ 1238a5b403dSArd Biesheuvel .reserved.max = INIT_MEMBLOCK_RESERVED_REGIONS, 1240262d9c8SHeiko Carstens .reserved.name = "reserved", 125fe091c20STejun Heo 12679442ed1STang Chen .bottom_up = false, 127fe091c20STejun Heo .current_limit = MEMBLOCK_ALLOC_ANYWHERE, 128fe091c20STejun Heo }; 12995f72d1eSYinghai Lu 13077649905SDavid Hildenbrand #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP 13177649905SDavid Hildenbrand struct memblock_type physmem = { 13277649905SDavid Hildenbrand .regions = memblock_physmem_init_regions, 13377649905SDavid Hildenbrand .cnt = 1, /* empty dummy entry */ 13477649905SDavid Hildenbrand .max = INIT_PHYSMEM_REGIONS, 13577649905SDavid Hildenbrand .name = "physmem", 13677649905SDavid Hildenbrand }; 13777649905SDavid Hildenbrand #endif 13877649905SDavid Hildenbrand 1399f3d5eaaSMike Rapoport /* 1409f3d5eaaSMike Rapoport * keep a pointer to &memblock.memory in the text section to use it in 1419f3d5eaaSMike Rapoport * __next_mem_range() and its helpers. 1429f3d5eaaSMike Rapoport * For architectures that do not keep memblock data after init, this 1439f3d5eaaSMike Rapoport * pointer will be reset to NULL at memblock_discard() 1449f3d5eaaSMike Rapoport */ 1459f3d5eaaSMike Rapoport static __refdata struct memblock_type *memblock_memory = &memblock.memory; 1469f3d5eaaSMike Rapoport 147cd991db8SMike Rapoport #define for_each_memblock_type(i, memblock_type, rgn) \ 148cd991db8SMike Rapoport for (i = 0, rgn = &memblock_type->regions[0]; \ 149cd991db8SMike Rapoport i < memblock_type->cnt; \ 150cd991db8SMike Rapoport i++, rgn = &memblock_type->regions[i]) 151cd991db8SMike Rapoport 15287c55870SMike Rapoport #define memblock_dbg(fmt, ...) \ 15387c55870SMike Rapoport do { \ 15487c55870SMike Rapoport if (memblock_debug) \ 15587c55870SMike Rapoport pr_info(fmt, ##__VA_ARGS__); \ 15687c55870SMike Rapoport } while (0) 15787c55870SMike Rapoport 15887c55870SMike Rapoport static int memblock_debug __initdata_memblock; 159fc493f83SClaudio Migliorelli static bool system_has_some_mirror __initdata_memblock; 1601aadc056STejun Heo static int memblock_can_resize __initdata_memblock; 161fc493f83SClaudio Migliorelli static int memblock_memory_in_slab __initdata_memblock; 162fc493f83SClaudio Migliorelli static int memblock_reserved_in_slab __initdata_memblock; 16395f72d1eSYinghai Lu 1640db31d63SMa Wupeng bool __init_memblock memblock_has_mirror(void) 1650db31d63SMa Wupeng { 1660db31d63SMa Wupeng return system_has_some_mirror; 1670db31d63SMa Wupeng } 1680db31d63SMa Wupeng 169c366ea89SMike Rapoport static enum memblock_flags __init_memblock choose_memblock_flags(void) 170a3f5bafcSTony Luck { 171a3f5bafcSTony Luck return system_has_some_mirror ? MEMBLOCK_MIRROR : MEMBLOCK_NONE; 172a3f5bafcSTony Luck } 173a3f5bafcSTony Luck 174eb18f1b5STejun Heo /* adjust *@size so that (@base + *@size) doesn't overflow, return new size */ 175eb18f1b5STejun Heo static inline phys_addr_t memblock_cap_size(phys_addr_t base, phys_addr_t *size) 176eb18f1b5STejun Heo { 1771c4bc43dSStefan Agner return *size = min(*size, PHYS_ADDR_MAX - base); 178eb18f1b5STejun Heo } 179eb18f1b5STejun Heo 1806ed311b2SBenjamin Herrenschmidt /* 1816ed311b2SBenjamin Herrenschmidt * Address comparison utilities 1826ed311b2SBenjamin Herrenschmidt */ 18310d06439SYinghai Lu static unsigned long __init_memblock memblock_addrs_overlap(phys_addr_t base1, phys_addr_t size1, 1842898cc4cSBenjamin Herrenschmidt phys_addr_t base2, phys_addr_t size2) 18595f72d1eSYinghai Lu { 18695f72d1eSYinghai Lu return ((base1 < (base2 + size2)) && (base2 < (base1 + size1))); 18795f72d1eSYinghai Lu } 18895f72d1eSYinghai Lu 18995cf82ecSTang Chen bool __init_memblock memblock_overlaps_region(struct memblock_type *type, 1902d7d3eb2SH Hartley Sweeten phys_addr_t base, phys_addr_t size) 1916ed311b2SBenjamin Herrenschmidt { 1926ed311b2SBenjamin Herrenschmidt unsigned long i; 1936ed311b2SBenjamin Herrenschmidt 194023accf5SMike Rapoport memblock_cap_size(base, &size); 195023accf5SMike Rapoport 196f14516fbSAlexander Kuleshov for (i = 0; i < type->cnt; i++) 197f14516fbSAlexander Kuleshov if (memblock_addrs_overlap(base, size, type->regions[i].base, 198f14516fbSAlexander Kuleshov type->regions[i].size)) 1996ed311b2SBenjamin Herrenschmidt break; 200c5c5c9d1STang Chen return i < type->cnt; 2016ed311b2SBenjamin Herrenschmidt } 2026ed311b2SBenjamin Herrenschmidt 20347cec443SMike Rapoport /** 20479442ed1STang Chen * __memblock_find_range_bottom_up - find free area utility in bottom-up 20579442ed1STang Chen * @start: start of candidate range 20647cec443SMike Rapoport * @end: end of candidate range, can be %MEMBLOCK_ALLOC_ANYWHERE or 20747cec443SMike Rapoport * %MEMBLOCK_ALLOC_ACCESSIBLE 20879442ed1STang Chen * @size: size of free area to find 20979442ed1STang Chen * @align: alignment of free area to find 210b1154233SGrygorii Strashko * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 211fc6daaf9STony Luck * @flags: pick from blocks based on memory attributes 21279442ed1STang Chen * 21379442ed1STang Chen * Utility called from memblock_find_in_range_node(), find free area bottom-up. 21479442ed1STang Chen * 21547cec443SMike Rapoport * Return: 21679442ed1STang Chen * Found address on success, 0 on failure. 21779442ed1STang Chen */ 21879442ed1STang Chen static phys_addr_t __init_memblock 21979442ed1STang Chen __memblock_find_range_bottom_up(phys_addr_t start, phys_addr_t end, 220fc6daaf9STony Luck phys_addr_t size, phys_addr_t align, int nid, 221e1720feeSMike Rapoport enum memblock_flags flags) 22279442ed1STang Chen { 22379442ed1STang Chen phys_addr_t this_start, this_end, cand; 22479442ed1STang Chen u64 i; 22579442ed1STang Chen 226fc6daaf9STony Luck for_each_free_mem_range(i, nid, flags, &this_start, &this_end, NULL) { 22779442ed1STang Chen this_start = clamp(this_start, start, end); 22879442ed1STang Chen this_end = clamp(this_end, start, end); 22979442ed1STang Chen 23079442ed1STang Chen cand = round_up(this_start, align); 23179442ed1STang Chen if (cand < this_end && this_end - cand >= size) 23279442ed1STang Chen return cand; 23379442ed1STang Chen } 23479442ed1STang Chen 23579442ed1STang Chen return 0; 23679442ed1STang Chen } 23779442ed1STang Chen 2387bd0b0f0STejun Heo /** 2391402899eSTang Chen * __memblock_find_range_top_down - find free area utility, in top-down 2401402899eSTang Chen * @start: start of candidate range 24147cec443SMike Rapoport * @end: end of candidate range, can be %MEMBLOCK_ALLOC_ANYWHERE or 24247cec443SMike Rapoport * %MEMBLOCK_ALLOC_ACCESSIBLE 2431402899eSTang Chen * @size: size of free area to find 2441402899eSTang Chen * @align: alignment of free area to find 245b1154233SGrygorii Strashko * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 246fc6daaf9STony Luck * @flags: pick from blocks based on memory attributes 2471402899eSTang Chen * 2481402899eSTang Chen * Utility called from memblock_find_in_range_node(), find free area top-down. 2491402899eSTang Chen * 25047cec443SMike Rapoport * Return: 25179442ed1STang Chen * Found address on success, 0 on failure. 2521402899eSTang Chen */ 2531402899eSTang Chen static phys_addr_t __init_memblock 2541402899eSTang Chen __memblock_find_range_top_down(phys_addr_t start, phys_addr_t end, 255fc6daaf9STony Luck phys_addr_t size, phys_addr_t align, int nid, 256e1720feeSMike Rapoport enum memblock_flags flags) 2571402899eSTang Chen { 2581402899eSTang Chen phys_addr_t this_start, this_end, cand; 2591402899eSTang Chen u64 i; 2601402899eSTang Chen 261fc6daaf9STony Luck for_each_free_mem_range_reverse(i, nid, flags, &this_start, &this_end, 262fc6daaf9STony Luck NULL) { 2631402899eSTang Chen this_start = clamp(this_start, start, end); 2641402899eSTang Chen this_end = clamp(this_end, start, end); 2651402899eSTang Chen 2661402899eSTang Chen if (this_end < size) 2671402899eSTang Chen continue; 2681402899eSTang Chen 2691402899eSTang Chen cand = round_down(this_end - size, align); 2701402899eSTang Chen if (cand >= this_start) 2711402899eSTang Chen return cand; 2721402899eSTang Chen } 2731402899eSTang Chen 2741402899eSTang Chen return 0; 2751402899eSTang Chen } 2761402899eSTang Chen 2771402899eSTang Chen /** 2787bd0b0f0STejun Heo * memblock_find_in_range_node - find free area in given range and node 2797bd0b0f0STejun Heo * @size: size of free area to find 2807bd0b0f0STejun Heo * @align: alignment of free area to find 28187029ee9SGrygorii Strashko * @start: start of candidate range 28247cec443SMike Rapoport * @end: end of candidate range, can be %MEMBLOCK_ALLOC_ANYWHERE or 28347cec443SMike Rapoport * %MEMBLOCK_ALLOC_ACCESSIBLE 284b1154233SGrygorii Strashko * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 285fc6daaf9STony Luck * @flags: pick from blocks based on memory attributes 2867bd0b0f0STejun Heo * 2877bd0b0f0STejun Heo * Find @size free area aligned to @align in the specified range and node. 2887bd0b0f0STejun Heo * 28947cec443SMike Rapoport * Return: 29079442ed1STang Chen * Found address on success, 0 on failure. 2916ed311b2SBenjamin Herrenschmidt */ 292c366ea89SMike Rapoport static phys_addr_t __init_memblock memblock_find_in_range_node(phys_addr_t size, 29387029ee9SGrygorii Strashko phys_addr_t align, phys_addr_t start, 294e1720feeSMike Rapoport phys_addr_t end, int nid, 295e1720feeSMike Rapoport enum memblock_flags flags) 296f7210e6cSTang Chen { 297f7210e6cSTang Chen /* pump up @end */ 298fed84c78SQian Cai if (end == MEMBLOCK_ALLOC_ACCESSIBLE || 299c6975d7cSQian Cai end == MEMBLOCK_ALLOC_NOLEAKTRACE) 300f7210e6cSTang Chen end = memblock.current_limit; 301f7210e6cSTang Chen 302f7210e6cSTang Chen /* avoid allocating the first page */ 303f7210e6cSTang Chen start = max_t(phys_addr_t, start, PAGE_SIZE); 304f7210e6cSTang Chen end = max(start, end); 30579442ed1STang Chen 3062dcb3964SRoman Gushchin if (memblock_bottom_up()) 3072dcb3964SRoman Gushchin return __memblock_find_range_bottom_up(start, end, size, align, 3082dcb3964SRoman Gushchin nid, flags); 3092dcb3964SRoman Gushchin else 3102dcb3964SRoman Gushchin return __memblock_find_range_top_down(start, end, size, align, 3112dcb3964SRoman Gushchin nid, flags); 312f7210e6cSTang Chen } 3136ed311b2SBenjamin Herrenschmidt 3147bd0b0f0STejun Heo /** 3157bd0b0f0STejun Heo * memblock_find_in_range - find free area in given range 3167bd0b0f0STejun Heo * @start: start of candidate range 31747cec443SMike Rapoport * @end: end of candidate range, can be %MEMBLOCK_ALLOC_ANYWHERE or 31847cec443SMike Rapoport * %MEMBLOCK_ALLOC_ACCESSIBLE 3197bd0b0f0STejun Heo * @size: size of free area to find 3207bd0b0f0STejun Heo * @align: alignment of free area to find 3217bd0b0f0STejun Heo * 3227bd0b0f0STejun Heo * Find @size free area aligned to @align in the specified range. 3237bd0b0f0STejun Heo * 32447cec443SMike Rapoport * Return: 32579442ed1STang Chen * Found address on success, 0 on failure. 3267bd0b0f0STejun Heo */ 327a7259df7SMike Rapoport static phys_addr_t __init_memblock memblock_find_in_range(phys_addr_t start, 3287bd0b0f0STejun Heo phys_addr_t end, phys_addr_t size, 3297bd0b0f0STejun Heo phys_addr_t align) 3307bd0b0f0STejun Heo { 331a3f5bafcSTony Luck phys_addr_t ret; 332e1720feeSMike Rapoport enum memblock_flags flags = choose_memblock_flags(); 333a3f5bafcSTony Luck 334a3f5bafcSTony Luck again: 335a3f5bafcSTony Luck ret = memblock_find_in_range_node(size, align, start, end, 336a3f5bafcSTony Luck NUMA_NO_NODE, flags); 337a3f5bafcSTony Luck 338a3f5bafcSTony Luck if (!ret && (flags & MEMBLOCK_MIRROR)) { 33914d9a675SMa Wupeng pr_warn_ratelimited("Could not allocate %pap bytes of mirrored memory\n", 340a3f5bafcSTony Luck &size); 341a3f5bafcSTony Luck flags &= ~MEMBLOCK_MIRROR; 342a3f5bafcSTony Luck goto again; 343a3f5bafcSTony Luck } 344a3f5bafcSTony Luck 345a3f5bafcSTony Luck return ret; 3467bd0b0f0STejun Heo } 3477bd0b0f0STejun Heo 34810d06439SYinghai Lu static void __init_memblock memblock_remove_region(struct memblock_type *type, unsigned long r) 34995f72d1eSYinghai Lu { 3501440c4e2STejun Heo type->total_size -= type->regions[r].size; 3517c0caeb8STejun Heo memmove(&type->regions[r], &type->regions[r + 1], 3527c0caeb8STejun Heo (type->cnt - (r + 1)) * sizeof(type->regions[r])); 353e3239ff9SBenjamin Herrenschmidt type->cnt--; 35495f72d1eSYinghai Lu 3558f7a6605SBenjamin Herrenschmidt /* Special case for empty arrays */ 3568f7a6605SBenjamin Herrenschmidt if (type->cnt == 0) { 3571440c4e2STejun Heo WARN_ON(type->total_size != 0); 3588f7a6605SBenjamin Herrenschmidt type->cnt = 1; 3598f7a6605SBenjamin Herrenschmidt type->regions[0].base = 0; 3608f7a6605SBenjamin Herrenschmidt type->regions[0].size = 0; 36166a20757STang Chen type->regions[0].flags = 0; 3627c0caeb8STejun Heo memblock_set_region_node(&type->regions[0], MAX_NUMNODES); 3638f7a6605SBenjamin Herrenschmidt } 36495f72d1eSYinghai Lu } 36595f72d1eSYinghai Lu 366350e88baSMike Rapoport #ifndef CONFIG_ARCH_KEEP_MEMBLOCK 3673010f876SPavel Tatashin /** 36847cec443SMike Rapoport * memblock_discard - discard memory and reserved arrays if they were allocated 3693010f876SPavel Tatashin */ 3703010f876SPavel Tatashin void __init memblock_discard(void) 37129f67386SYinghai Lu { 3723010f876SPavel Tatashin phys_addr_t addr, size; 37329f67386SYinghai Lu 3743010f876SPavel Tatashin if (memblock.reserved.regions != memblock_reserved_init_regions) { 3753010f876SPavel Tatashin addr = __pa(memblock.reserved.regions); 3763010f876SPavel Tatashin size = PAGE_ALIGN(sizeof(struct memblock_region) * 37729f67386SYinghai Lu memblock.reserved.max); 378c94afc46SMiaohe Lin if (memblock_reserved_in_slab) 379c94afc46SMiaohe Lin kfree(memblock.reserved.regions); 380c94afc46SMiaohe Lin else 381621d9739SMike Rapoport memblock_free_late(addr, size); 38229f67386SYinghai Lu } 38329f67386SYinghai Lu 38491b540f9SPavel Tatashin if (memblock.memory.regions != memblock_memory_init_regions) { 3853010f876SPavel Tatashin addr = __pa(memblock.memory.regions); 3863010f876SPavel Tatashin size = PAGE_ALIGN(sizeof(struct memblock_region) * 3875e270e25SPhilipp Hachtmann memblock.memory.max); 388c94afc46SMiaohe Lin if (memblock_memory_in_slab) 389c94afc46SMiaohe Lin kfree(memblock.memory.regions); 390c94afc46SMiaohe Lin else 391621d9739SMike Rapoport memblock_free_late(addr, size); 3925e270e25SPhilipp Hachtmann } 3939f3d5eaaSMike Rapoport 3949f3d5eaaSMike Rapoport memblock_memory = NULL; 3953010f876SPavel Tatashin } 3965e270e25SPhilipp Hachtmann #endif 3975e270e25SPhilipp Hachtmann 39848c3b583SGreg Pearson /** 39948c3b583SGreg Pearson * memblock_double_array - double the size of the memblock regions array 40048c3b583SGreg Pearson * @type: memblock type of the regions array being doubled 40148c3b583SGreg Pearson * @new_area_start: starting address of memory range to avoid overlap with 40248c3b583SGreg Pearson * @new_area_size: size of memory range to avoid overlap with 40348c3b583SGreg Pearson * 40448c3b583SGreg Pearson * Double the size of the @type regions array. If memblock is being used to 40548c3b583SGreg Pearson * allocate memory for a new reserved regions array and there is a previously 40648c3b583SGreg Pearson * allocated memory range [@new_area_start, @new_area_start + @new_area_size] 40748c3b583SGreg Pearson * waiting to be reserved, ensure the memory used by the new array does 40848c3b583SGreg Pearson * not overlap. 40948c3b583SGreg Pearson * 41047cec443SMike Rapoport * Return: 41148c3b583SGreg Pearson * 0 on success, -1 on failure. 41248c3b583SGreg Pearson */ 41348c3b583SGreg Pearson static int __init_memblock memblock_double_array(struct memblock_type *type, 41448c3b583SGreg Pearson phys_addr_t new_area_start, 41548c3b583SGreg Pearson phys_addr_t new_area_size) 416142b45a7SBenjamin Herrenschmidt { 417142b45a7SBenjamin Herrenschmidt struct memblock_region *new_array, *old_array; 41829f67386SYinghai Lu phys_addr_t old_alloc_size, new_alloc_size; 419a36aab89SMike Rapoport phys_addr_t old_size, new_size, addr, new_end; 420142b45a7SBenjamin Herrenschmidt int use_slab = slab_is_available(); 421181eb394SGavin Shan int *in_slab; 422142b45a7SBenjamin Herrenschmidt 423142b45a7SBenjamin Herrenschmidt /* We don't allow resizing until we know about the reserved regions 424142b45a7SBenjamin Herrenschmidt * of memory that aren't suitable for allocation 425142b45a7SBenjamin Herrenschmidt */ 426142b45a7SBenjamin Herrenschmidt if (!memblock_can_resize) 427142b45a7SBenjamin Herrenschmidt return -1; 428142b45a7SBenjamin Herrenschmidt 429142b45a7SBenjamin Herrenschmidt /* Calculate new doubled size */ 430142b45a7SBenjamin Herrenschmidt old_size = type->max * sizeof(struct memblock_region); 431142b45a7SBenjamin Herrenschmidt new_size = old_size << 1; 43229f67386SYinghai Lu /* 43329f67386SYinghai Lu * We need to allocated new one align to PAGE_SIZE, 43429f67386SYinghai Lu * so we can free them completely later. 43529f67386SYinghai Lu */ 43629f67386SYinghai Lu old_alloc_size = PAGE_ALIGN(old_size); 43729f67386SYinghai Lu new_alloc_size = PAGE_ALIGN(new_size); 438142b45a7SBenjamin Herrenschmidt 439181eb394SGavin Shan /* Retrieve the slab flag */ 440181eb394SGavin Shan if (type == &memblock.memory) 441181eb394SGavin Shan in_slab = &memblock_memory_in_slab; 442181eb394SGavin Shan else 443181eb394SGavin Shan in_slab = &memblock_reserved_in_slab; 444181eb394SGavin Shan 445a2974133SMike Rapoport /* Try to find some space for it */ 446142b45a7SBenjamin Herrenschmidt if (use_slab) { 447142b45a7SBenjamin Herrenschmidt new_array = kmalloc(new_size, GFP_KERNEL); 4481f5026a7STejun Heo addr = new_array ? __pa(new_array) : 0; 4494e2f0775SGavin Shan } else { 45048c3b583SGreg Pearson /* only exclude range when trying to double reserved.regions */ 45148c3b583SGreg Pearson if (type != &memblock.reserved) 45248c3b583SGreg Pearson new_area_start = new_area_size = 0; 45348c3b583SGreg Pearson 45448c3b583SGreg Pearson addr = memblock_find_in_range(new_area_start + new_area_size, 45548c3b583SGreg Pearson memblock.current_limit, 45629f67386SYinghai Lu new_alloc_size, PAGE_SIZE); 45748c3b583SGreg Pearson if (!addr && new_area_size) 45848c3b583SGreg Pearson addr = memblock_find_in_range(0, 45948c3b583SGreg Pearson min(new_area_start, memblock.current_limit), 46029f67386SYinghai Lu new_alloc_size, PAGE_SIZE); 46148c3b583SGreg Pearson 46215674868SSachin Kamat new_array = addr ? __va(addr) : NULL; 4634e2f0775SGavin Shan } 4641f5026a7STejun Heo if (!addr) { 465142b45a7SBenjamin Herrenschmidt pr_err("memblock: Failed to double %s array from %ld to %ld entries !\n", 4660262d9c8SHeiko Carstens type->name, type->max, type->max * 2); 467142b45a7SBenjamin Herrenschmidt return -1; 468142b45a7SBenjamin Herrenschmidt } 469142b45a7SBenjamin Herrenschmidt 470a36aab89SMike Rapoport new_end = addr + new_size - 1; 471a36aab89SMike Rapoport memblock_dbg("memblock: %s is doubled to %ld at [%pa-%pa]", 472a36aab89SMike Rapoport type->name, type->max * 2, &addr, &new_end); 473ea9e4376SYinghai Lu 474fd07383bSAndrew Morton /* 475fd07383bSAndrew Morton * Found space, we now need to move the array over before we add the 476fd07383bSAndrew Morton * reserved region since it may be our reserved array itself that is 477fd07383bSAndrew Morton * full. 478142b45a7SBenjamin Herrenschmidt */ 479142b45a7SBenjamin Herrenschmidt memcpy(new_array, type->regions, old_size); 480142b45a7SBenjamin Herrenschmidt memset(new_array + type->max, 0, old_size); 481142b45a7SBenjamin Herrenschmidt old_array = type->regions; 482142b45a7SBenjamin Herrenschmidt type->regions = new_array; 483142b45a7SBenjamin Herrenschmidt type->max <<= 1; 484142b45a7SBenjamin Herrenschmidt 485fd07383bSAndrew Morton /* Free old array. We needn't free it if the array is the static one */ 486181eb394SGavin Shan if (*in_slab) 487181eb394SGavin Shan kfree(old_array); 488181eb394SGavin Shan else if (old_array != memblock_memory_init_regions && 489142b45a7SBenjamin Herrenschmidt old_array != memblock_reserved_init_regions) 4904421cca0SMike Rapoport memblock_free(old_array, old_alloc_size); 491142b45a7SBenjamin Herrenschmidt 492fd07383bSAndrew Morton /* 493fd07383bSAndrew Morton * Reserve the new array if that comes from the memblock. Otherwise, we 494fd07383bSAndrew Morton * needn't do it 495181eb394SGavin Shan */ 496181eb394SGavin Shan if (!use_slab) 49729f67386SYinghai Lu BUG_ON(memblock_reserve(addr, new_alloc_size)); 498181eb394SGavin Shan 499181eb394SGavin Shan /* Update slab flag */ 500181eb394SGavin Shan *in_slab = use_slab; 501181eb394SGavin Shan 502142b45a7SBenjamin Herrenschmidt return 0; 503142b45a7SBenjamin Herrenschmidt } 504142b45a7SBenjamin Herrenschmidt 505784656f9STejun Heo /** 506784656f9STejun Heo * memblock_merge_regions - merge neighboring compatible regions 507784656f9STejun Heo * @type: memblock type to scan 5082fe03412SPeng Zhang * @start_rgn: start scanning from (@start_rgn - 1) 5092fe03412SPeng Zhang * @end_rgn: end scanning at (@end_rgn - 1) 5102fe03412SPeng Zhang * Scan @type and merge neighboring compatible regions in [@start_rgn - 1, @end_rgn) 511784656f9STejun Heo */ 5122fe03412SPeng Zhang static void __init_memblock memblock_merge_regions(struct memblock_type *type, 5132fe03412SPeng Zhang unsigned long start_rgn, 5142fe03412SPeng Zhang unsigned long end_rgn) 515784656f9STejun Heo { 516784656f9STejun Heo int i = 0; 5172fe03412SPeng Zhang if (start_rgn) 5182fe03412SPeng Zhang i = start_rgn - 1; 5192fe03412SPeng Zhang end_rgn = min(end_rgn, type->cnt - 1); 5202fe03412SPeng Zhang while (i < end_rgn) { 521784656f9STejun Heo struct memblock_region *this = &type->regions[i]; 522784656f9STejun Heo struct memblock_region *next = &type->regions[i + 1]; 523784656f9STejun Heo 5247c0caeb8STejun Heo if (this->base + this->size != next->base || 5257c0caeb8STejun Heo memblock_get_region_node(this) != 52666a20757STang Chen memblock_get_region_node(next) || 52766a20757STang Chen this->flags != next->flags) { 528784656f9STejun Heo BUG_ON(this->base + this->size > next->base); 529784656f9STejun Heo i++; 530784656f9STejun Heo continue; 531784656f9STejun Heo } 532784656f9STejun Heo 533784656f9STejun Heo this->size += next->size; 534c0232ae8SLin Feng /* move forward from next + 1, index of which is i + 2 */ 535c0232ae8SLin Feng memmove(next, next + 1, (type->cnt - (i + 2)) * sizeof(*next)); 536784656f9STejun Heo type->cnt--; 5372fe03412SPeng Zhang end_rgn--; 538784656f9STejun Heo } 539784656f9STejun Heo } 540784656f9STejun Heo 541784656f9STejun Heo /** 542784656f9STejun Heo * memblock_insert_region - insert new memblock region 543784656f9STejun Heo * @type: memblock type to insert into 544784656f9STejun Heo * @idx: index for the insertion point 545784656f9STejun Heo * @base: base address of the new region 546784656f9STejun Heo * @size: size of the new region 547209ff86dSTang Chen * @nid: node id of the new region 54866a20757STang Chen * @flags: flags of the new region 549784656f9STejun Heo * 550784656f9STejun Heo * Insert new memblock region [@base, @base + @size) into @type at @idx. 551412d0008SAlexander Kuleshov * @type must already have extra room to accommodate the new region. 552784656f9STejun Heo */ 553784656f9STejun Heo static void __init_memblock memblock_insert_region(struct memblock_type *type, 554784656f9STejun Heo int idx, phys_addr_t base, 55566a20757STang Chen phys_addr_t size, 556e1720feeSMike Rapoport int nid, 557e1720feeSMike Rapoport enum memblock_flags flags) 558784656f9STejun Heo { 559784656f9STejun Heo struct memblock_region *rgn = &type->regions[idx]; 560784656f9STejun Heo 561784656f9STejun Heo BUG_ON(type->cnt >= type->max); 562784656f9STejun Heo memmove(rgn + 1, rgn, (type->cnt - idx) * sizeof(*rgn)); 563784656f9STejun Heo rgn->base = base; 564784656f9STejun Heo rgn->size = size; 56566a20757STang Chen rgn->flags = flags; 5667c0caeb8STejun Heo memblock_set_region_node(rgn, nid); 567784656f9STejun Heo type->cnt++; 5681440c4e2STejun Heo type->total_size += size; 569784656f9STejun Heo } 570784656f9STejun Heo 571784656f9STejun Heo /** 572f1af9d3aSPhilipp Hachtmann * memblock_add_range - add new memblock region 573784656f9STejun Heo * @type: memblock type to add new region into 574784656f9STejun Heo * @base: base address of the new region 575784656f9STejun Heo * @size: size of the new region 5767fb0bc3fSTejun Heo * @nid: nid of the new region 57766a20757STang Chen * @flags: flags of the new region 578784656f9STejun Heo * 579784656f9STejun Heo * Add new memblock region [@base, @base + @size) into @type. The new region 580784656f9STejun Heo * is allowed to overlap with existing ones - overlaps don't affect already 581784656f9STejun Heo * existing regions. @type is guaranteed to be minimal (all neighbouring 582784656f9STejun Heo * compatible regions are merged) after the addition. 583784656f9STejun Heo * 58447cec443SMike Rapoport * Return: 585784656f9STejun Heo * 0 on success, -errno on failure. 586784656f9STejun Heo */ 58702634a44SAnshuman Khandual static int __init_memblock memblock_add_range(struct memblock_type *type, 58866a20757STang Chen phys_addr_t base, phys_addr_t size, 589e1720feeSMike Rapoport int nid, enum memblock_flags flags) 59095f72d1eSYinghai Lu { 591784656f9STejun Heo bool insert = false; 592eb18f1b5STejun Heo phys_addr_t obase = base; 593eb18f1b5STejun Heo phys_addr_t end = base + memblock_cap_size(base, &size); 5942fe03412SPeng Zhang int idx, nr_new, start_rgn = -1, end_rgn; 5958c9c1701SAlexander Kuleshov struct memblock_region *rgn; 59695f72d1eSYinghai Lu 597b3dc627cSTejun Heo if (!size) 598b3dc627cSTejun Heo return 0; 599b3dc627cSTejun Heo 600784656f9STejun Heo /* special case for empty array */ 601784656f9STejun Heo if (type->regions[0].size == 0) { 6021440c4e2STejun Heo WARN_ON(type->cnt != 1 || type->total_size); 603784656f9STejun Heo type->regions[0].base = base; 604784656f9STejun Heo type->regions[0].size = size; 60566a20757STang Chen type->regions[0].flags = flags; 6067fb0bc3fSTejun Heo memblock_set_region_node(&type->regions[0], nid); 6071440c4e2STejun Heo type->total_size = size; 608784656f9STejun Heo return 0; 609784656f9STejun Heo } 61028e1a8f4SJinyu Tang 61128e1a8f4SJinyu Tang /* 61228e1a8f4SJinyu Tang * The worst case is when new range overlaps all existing regions, 61328e1a8f4SJinyu Tang * then we'll need type->cnt + 1 empty regions in @type. So if 614ad500fb2SPeng Zhang * type->cnt * 2 + 1 is less than or equal to type->max, we know 61528e1a8f4SJinyu Tang * that there is enough empty regions in @type, and we can insert 61628e1a8f4SJinyu Tang * regions directly. 61728e1a8f4SJinyu Tang */ 618ad500fb2SPeng Zhang if (type->cnt * 2 + 1 <= type->max) 61928e1a8f4SJinyu Tang insert = true; 62028e1a8f4SJinyu Tang 621784656f9STejun Heo repeat: 622784656f9STejun Heo /* 623784656f9STejun Heo * The following is executed twice. Once with %false @insert and 624784656f9STejun Heo * then with %true. The first counts the number of regions needed 625412d0008SAlexander Kuleshov * to accommodate the new area. The second actually inserts them. 626784656f9STejun Heo */ 627784656f9STejun Heo base = obase; 628784656f9STejun Heo nr_new = 0; 629784656f9STejun Heo 63066e8b438SGioh Kim for_each_memblock_type(idx, type, rgn) { 631784656f9STejun Heo phys_addr_t rbase = rgn->base; 632784656f9STejun Heo phys_addr_t rend = rbase + rgn->size; 6338f7a6605SBenjamin Herrenschmidt 634784656f9STejun Heo if (rbase >= end) 6358f7a6605SBenjamin Herrenschmidt break; 636784656f9STejun Heo if (rend <= base) 637784656f9STejun Heo continue; 638784656f9STejun Heo /* 639784656f9STejun Heo * @rgn overlaps. If it separates the lower part of new 640784656f9STejun Heo * area, insert that portion. 6418f7a6605SBenjamin Herrenschmidt */ 642784656f9STejun Heo if (rbase > base) { 643a9ee6cf5SMike Rapoport #ifdef CONFIG_NUMA 644c0a29498SWei Yang WARN_ON(nid != memblock_get_region_node(rgn)); 645c0a29498SWei Yang #endif 6464fcab5f4SWei Yang WARN_ON(flags != rgn->flags); 647784656f9STejun Heo nr_new++; 6482fe03412SPeng Zhang if (insert) { 6492fe03412SPeng Zhang if (start_rgn == -1) 6502fe03412SPeng Zhang start_rgn = idx; 6512fe03412SPeng Zhang end_rgn = idx + 1; 6528c9c1701SAlexander Kuleshov memblock_insert_region(type, idx++, base, 65366a20757STang Chen rbase - base, nid, 65466a20757STang Chen flags); 655784656f9STejun Heo } 6562fe03412SPeng Zhang } 657784656f9STejun Heo /* area below @rend is dealt with, forget about it */ 658784656f9STejun Heo base = min(rend, end); 6598f7a6605SBenjamin Herrenschmidt } 6608f7a6605SBenjamin Herrenschmidt 661784656f9STejun Heo /* insert the remaining portion */ 662784656f9STejun Heo if (base < end) { 663784656f9STejun Heo nr_new++; 6642fe03412SPeng Zhang if (insert) { 6652fe03412SPeng Zhang if (start_rgn == -1) 6662fe03412SPeng Zhang start_rgn = idx; 6672fe03412SPeng Zhang end_rgn = idx + 1; 6688c9c1701SAlexander Kuleshov memblock_insert_region(type, idx, base, end - base, 66966a20757STang Chen nid, flags); 6708f7a6605SBenjamin Herrenschmidt } 6712fe03412SPeng Zhang } 6728f7a6605SBenjamin Herrenschmidt 673ef3cc4dbSnimisolo if (!nr_new) 674ef3cc4dbSnimisolo return 0; 675ef3cc4dbSnimisolo 676784656f9STejun Heo /* 677784656f9STejun Heo * If this was the first round, resize array and repeat for actual 678784656f9STejun Heo * insertions; otherwise, merge and return. 6798f7a6605SBenjamin Herrenschmidt */ 680784656f9STejun Heo if (!insert) { 681784656f9STejun Heo while (type->cnt + nr_new > type->max) 68248c3b583SGreg Pearson if (memblock_double_array(type, obase, size) < 0) 683784656f9STejun Heo return -ENOMEM; 684784656f9STejun Heo insert = true; 685784656f9STejun Heo goto repeat; 68695f72d1eSYinghai Lu } else { 6872fe03412SPeng Zhang memblock_merge_regions(type, start_rgn, end_rgn); 68895f72d1eSYinghai Lu return 0; 68995f72d1eSYinghai Lu } 690784656f9STejun Heo } 69195f72d1eSYinghai Lu 69248a833ccSMike Rapoport /** 69348a833ccSMike Rapoport * memblock_add_node - add new memblock region within a NUMA node 69448a833ccSMike Rapoport * @base: base address of the new region 69548a833ccSMike Rapoport * @size: size of the new region 69648a833ccSMike Rapoport * @nid: nid of the new region 697952eea9bSDavid Hildenbrand * @flags: flags of the new region 69848a833ccSMike Rapoport * 69948a833ccSMike Rapoport * Add new memblock region [@base, @base + @size) to the "memory" 70048a833ccSMike Rapoport * type. See memblock_add_range() description for mode details 70148a833ccSMike Rapoport * 70248a833ccSMike Rapoport * Return: 70348a833ccSMike Rapoport * 0 on success, -errno on failure. 70448a833ccSMike Rapoport */ 7057fb0bc3fSTejun Heo int __init_memblock memblock_add_node(phys_addr_t base, phys_addr_t size, 706952eea9bSDavid Hildenbrand int nid, enum memblock_flags flags) 7077fb0bc3fSTejun Heo { 70800974b9aSGeert Uytterhoeven phys_addr_t end = base + size - 1; 70900974b9aSGeert Uytterhoeven 710952eea9bSDavid Hildenbrand memblock_dbg("%s: [%pa-%pa] nid=%d flags=%x %pS\n", __func__, 711952eea9bSDavid Hildenbrand &base, &end, nid, flags, (void *)_RET_IP_); 71200974b9aSGeert Uytterhoeven 713952eea9bSDavid Hildenbrand return memblock_add_range(&memblock.memory, base, size, nid, flags); 7147fb0bc3fSTejun Heo } 7157fb0bc3fSTejun Heo 71648a833ccSMike Rapoport /** 71748a833ccSMike Rapoport * memblock_add - add new memblock region 71848a833ccSMike Rapoport * @base: base address of the new region 71948a833ccSMike Rapoport * @size: size of the new region 72048a833ccSMike Rapoport * 72148a833ccSMike Rapoport * Add new memblock region [@base, @base + @size) to the "memory" 72248a833ccSMike Rapoport * type. See memblock_add_range() description for mode details 72348a833ccSMike Rapoport * 72448a833ccSMike Rapoport * Return: 72548a833ccSMike Rapoport * 0 on success, -errno on failure. 72648a833ccSMike Rapoport */ 727f705ac4bSAlexander Kuleshov int __init_memblock memblock_add(phys_addr_t base, phys_addr_t size) 7286a4055bcSAlexander Kuleshov { 7295d63f81cSMiles Chen phys_addr_t end = base + size - 1; 7305d63f81cSMiles Chen 731a090d711SAnshuman Khandual memblock_dbg("%s: [%pa-%pa] %pS\n", __func__, 7325d63f81cSMiles Chen &base, &end, (void *)_RET_IP_); 7336a4055bcSAlexander Kuleshov 734f705ac4bSAlexander Kuleshov return memblock_add_range(&memblock.memory, base, size, MAX_NUMNODES, 0); 73595f72d1eSYinghai Lu } 73695f72d1eSYinghai Lu 7376a9ceb31STejun Heo /** 7386a9ceb31STejun Heo * memblock_isolate_range - isolate given range into disjoint memblocks 7396a9ceb31STejun Heo * @type: memblock type to isolate range for 7406a9ceb31STejun Heo * @base: base of range to isolate 7416a9ceb31STejun Heo * @size: size of range to isolate 7426a9ceb31STejun Heo * @start_rgn: out parameter for the start of isolated region 7436a9ceb31STejun Heo * @end_rgn: out parameter for the end of isolated region 7446a9ceb31STejun Heo * 7456a9ceb31STejun Heo * Walk @type and ensure that regions don't cross the boundaries defined by 7466a9ceb31STejun Heo * [@base, @base + @size). Crossing regions are split at the boundaries, 7476a9ceb31STejun Heo * which may create at most two more regions. The index of the first 7486a9ceb31STejun Heo * region inside the range is returned in *@start_rgn and end in *@end_rgn. 7496a9ceb31STejun Heo * 75047cec443SMike Rapoport * Return: 7516a9ceb31STejun Heo * 0 on success, -errno on failure. 7526a9ceb31STejun Heo */ 7536a9ceb31STejun Heo static int __init_memblock memblock_isolate_range(struct memblock_type *type, 7546a9ceb31STejun Heo phys_addr_t base, phys_addr_t size, 7556a9ceb31STejun Heo int *start_rgn, int *end_rgn) 7566a9ceb31STejun Heo { 757eb18f1b5STejun Heo phys_addr_t end = base + memblock_cap_size(base, &size); 7588c9c1701SAlexander Kuleshov int idx; 7598c9c1701SAlexander Kuleshov struct memblock_region *rgn; 7606a9ceb31STejun Heo 7616a9ceb31STejun Heo *start_rgn = *end_rgn = 0; 7626a9ceb31STejun Heo 763b3dc627cSTejun Heo if (!size) 764b3dc627cSTejun Heo return 0; 765b3dc627cSTejun Heo 7666a9ceb31STejun Heo /* we'll create at most two more regions */ 7676a9ceb31STejun Heo while (type->cnt + 2 > type->max) 76848c3b583SGreg Pearson if (memblock_double_array(type, base, size) < 0) 7696a9ceb31STejun Heo return -ENOMEM; 7706a9ceb31STejun Heo 77166e8b438SGioh Kim for_each_memblock_type(idx, type, rgn) { 7726a9ceb31STejun Heo phys_addr_t rbase = rgn->base; 7736a9ceb31STejun Heo phys_addr_t rend = rbase + rgn->size; 7746a9ceb31STejun Heo 7756a9ceb31STejun Heo if (rbase >= end) 7766a9ceb31STejun Heo break; 7776a9ceb31STejun Heo if (rend <= base) 7786a9ceb31STejun Heo continue; 7796a9ceb31STejun Heo 7806a9ceb31STejun Heo if (rbase < base) { 7816a9ceb31STejun Heo /* 7826a9ceb31STejun Heo * @rgn intersects from below. Split and continue 7836a9ceb31STejun Heo * to process the next region - the new top half. 7846a9ceb31STejun Heo */ 7856a9ceb31STejun Heo rgn->base = base; 7861440c4e2STejun Heo rgn->size -= base - rbase; 7871440c4e2STejun Heo type->total_size -= base - rbase; 7888c9c1701SAlexander Kuleshov memblock_insert_region(type, idx, rbase, base - rbase, 78966a20757STang Chen memblock_get_region_node(rgn), 79066a20757STang Chen rgn->flags); 7916a9ceb31STejun Heo } else if (rend > end) { 7926a9ceb31STejun Heo /* 7936a9ceb31STejun Heo * @rgn intersects from above. Split and redo the 7946a9ceb31STejun Heo * current region - the new bottom half. 7956a9ceb31STejun Heo */ 7966a9ceb31STejun Heo rgn->base = end; 7971440c4e2STejun Heo rgn->size -= end - rbase; 7981440c4e2STejun Heo type->total_size -= end - rbase; 7998c9c1701SAlexander Kuleshov memblock_insert_region(type, idx--, rbase, end - rbase, 80066a20757STang Chen memblock_get_region_node(rgn), 80166a20757STang Chen rgn->flags); 8026a9ceb31STejun Heo } else { 8036a9ceb31STejun Heo /* @rgn is fully contained, record it */ 8046a9ceb31STejun Heo if (!*end_rgn) 8058c9c1701SAlexander Kuleshov *start_rgn = idx; 8068c9c1701SAlexander Kuleshov *end_rgn = idx + 1; 8076a9ceb31STejun Heo } 8086a9ceb31STejun Heo } 8096a9ceb31STejun Heo 8106a9ceb31STejun Heo return 0; 8116a9ceb31STejun Heo } 8126a9ceb31STejun Heo 81335bd16a2SAlexander Kuleshov static int __init_memblock memblock_remove_range(struct memblock_type *type, 8148f7a6605SBenjamin Herrenschmidt phys_addr_t base, phys_addr_t size) 81595f72d1eSYinghai Lu { 81671936180STejun Heo int start_rgn, end_rgn; 81771936180STejun Heo int i, ret; 81895f72d1eSYinghai Lu 81971936180STejun Heo ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); 82071936180STejun Heo if (ret) 82171936180STejun Heo return ret; 82295f72d1eSYinghai Lu 82371936180STejun Heo for (i = end_rgn - 1; i >= start_rgn; i--) 82471936180STejun Heo memblock_remove_region(type, i); 82595f72d1eSYinghai Lu return 0; 82695f72d1eSYinghai Lu } 82795f72d1eSYinghai Lu 828581adcbeSTejun Heo int __init_memblock memblock_remove(phys_addr_t base, phys_addr_t size) 82995f72d1eSYinghai Lu { 83025cf23d7SMinchan Kim phys_addr_t end = base + size - 1; 83125cf23d7SMinchan Kim 832a090d711SAnshuman Khandual memblock_dbg("%s: [%pa-%pa] %pS\n", __func__, 83325cf23d7SMinchan Kim &base, &end, (void *)_RET_IP_); 83425cf23d7SMinchan Kim 835f1af9d3aSPhilipp Hachtmann return memblock_remove_range(&memblock.memory, base, size); 83695f72d1eSYinghai Lu } 83795f72d1eSYinghai Lu 8384d72868cSMike Rapoport /** 8394421cca0SMike Rapoport * memblock_free - free boot memory allocation 84077e02cf5SLinus Torvalds * @ptr: starting address of the boot memory allocation 84177e02cf5SLinus Torvalds * @size: size of the boot memory block in bytes 84277e02cf5SLinus Torvalds * 84377e02cf5SLinus Torvalds * Free boot memory block previously allocated by memblock_alloc_xx() API. 84477e02cf5SLinus Torvalds * The freeing memory will not be released to the buddy allocator. 84577e02cf5SLinus Torvalds */ 8464421cca0SMike Rapoport void __init_memblock memblock_free(void *ptr, size_t size) 84777e02cf5SLinus Torvalds { 84877e02cf5SLinus Torvalds if (ptr) 8493ecc6834SMike Rapoport memblock_phys_free(__pa(ptr), size); 85077e02cf5SLinus Torvalds } 85177e02cf5SLinus Torvalds 85277e02cf5SLinus Torvalds /** 8533ecc6834SMike Rapoport * memblock_phys_free - free boot memory block 8544d72868cSMike Rapoport * @base: phys starting address of the boot memory block 8554d72868cSMike Rapoport * @size: size of the boot memory block in bytes 8564d72868cSMike Rapoport * 857fa81ab49SMiaoqian Lin * Free boot memory block previously allocated by memblock_phys_alloc_xx() API. 8584d72868cSMike Rapoport * The freeing memory will not be released to the buddy allocator. 8594d72868cSMike Rapoport */ 8603ecc6834SMike Rapoport int __init_memblock memblock_phys_free(phys_addr_t base, phys_addr_t size) 86195f72d1eSYinghai Lu { 8625d63f81cSMiles Chen phys_addr_t end = base + size - 1; 8635d63f81cSMiles Chen 864a090d711SAnshuman Khandual memblock_dbg("%s: [%pa-%pa] %pS\n", __func__, 8655d63f81cSMiles Chen &base, &end, (void *)_RET_IP_); 86624aa0788STejun Heo 8679099daedSCatalin Marinas kmemleak_free_part_phys(base, size); 868f1af9d3aSPhilipp Hachtmann return memblock_remove_range(&memblock.reserved, base, size); 86995f72d1eSYinghai Lu } 87095f72d1eSYinghai Lu 871f705ac4bSAlexander Kuleshov int __init_memblock memblock_reserve(phys_addr_t base, phys_addr_t size) 87295f72d1eSYinghai Lu { 8735d63f81cSMiles Chen phys_addr_t end = base + size - 1; 8745d63f81cSMiles Chen 875a090d711SAnshuman Khandual memblock_dbg("%s: [%pa-%pa] %pS\n", __func__, 8765d63f81cSMiles Chen &base, &end, (void *)_RET_IP_); 87795f72d1eSYinghai Lu 878f705ac4bSAlexander Kuleshov return memblock_add_range(&memblock.reserved, base, size, MAX_NUMNODES, 0); 87995f72d1eSYinghai Lu } 88095f72d1eSYinghai Lu 88102634a44SAnshuman Khandual #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP 88202634a44SAnshuman Khandual int __init_memblock memblock_physmem_add(phys_addr_t base, phys_addr_t size) 88302634a44SAnshuman Khandual { 88402634a44SAnshuman Khandual phys_addr_t end = base + size - 1; 88502634a44SAnshuman Khandual 88602634a44SAnshuman Khandual memblock_dbg("%s: [%pa-%pa] %pS\n", __func__, 88702634a44SAnshuman Khandual &base, &end, (void *)_RET_IP_); 88802634a44SAnshuman Khandual 88977649905SDavid Hildenbrand return memblock_add_range(&physmem, base, size, MAX_NUMNODES, 0); 89002634a44SAnshuman Khandual } 89102634a44SAnshuman Khandual #endif 89202634a44SAnshuman Khandual 89335fd0808STejun Heo /** 89447cec443SMike Rapoport * memblock_setclr_flag - set or clear flag for a memory region 895*ee8d2071SUsama Arif * @type: memblock type to set/clear flag for 89647cec443SMike Rapoport * @base: base address of the region 89747cec443SMike Rapoport * @size: size of the region 89847cec443SMike Rapoport * @set: set or clear the flag 8998958b249SHaitao Shi * @flag: the flag to update 90066b16edfSTang Chen * 9014308ce17STony Luck * This function isolates region [@base, @base + @size), and sets/clears flag 90266b16edfSTang Chen * 90347cec443SMike Rapoport * Return: 0 on success, -errno on failure. 90466b16edfSTang Chen */ 905*ee8d2071SUsama Arif static int __init_memblock memblock_setclr_flag(struct memblock_type *type, 906*ee8d2071SUsama Arif phys_addr_t base, phys_addr_t size, int set, int flag) 90766b16edfSTang Chen { 90866b16edfSTang Chen int i, ret, start_rgn, end_rgn; 90966b16edfSTang Chen 91066b16edfSTang Chen ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); 91166b16edfSTang Chen if (ret) 91266b16edfSTang Chen return ret; 91366b16edfSTang Chen 914fe145124SMike Rapoport for (i = start_rgn; i < end_rgn; i++) { 915fe145124SMike Rapoport struct memblock_region *r = &type->regions[i]; 916fe145124SMike Rapoport 9174308ce17STony Luck if (set) 918fe145124SMike Rapoport r->flags |= flag; 9194308ce17STony Luck else 920fe145124SMike Rapoport r->flags &= ~flag; 921fe145124SMike Rapoport } 92266b16edfSTang Chen 9232fe03412SPeng Zhang memblock_merge_regions(type, start_rgn, end_rgn); 92466b16edfSTang Chen return 0; 92566b16edfSTang Chen } 92666b16edfSTang Chen 92766b16edfSTang Chen /** 9284308ce17STony Luck * memblock_mark_hotplug - Mark hotpluggable memory with flag MEMBLOCK_HOTPLUG. 9294308ce17STony Luck * @base: the base phys addr of the region 9304308ce17STony Luck * @size: the size of the region 9314308ce17STony Luck * 93247cec443SMike Rapoport * Return: 0 on success, -errno on failure. 9334308ce17STony Luck */ 9344308ce17STony Luck int __init_memblock memblock_mark_hotplug(phys_addr_t base, phys_addr_t size) 9354308ce17STony Luck { 936*ee8d2071SUsama Arif return memblock_setclr_flag(&memblock.memory, base, size, 1, MEMBLOCK_HOTPLUG); 9374308ce17STony Luck } 9384308ce17STony Luck 9394308ce17STony Luck /** 94066b16edfSTang Chen * memblock_clear_hotplug - Clear flag MEMBLOCK_HOTPLUG for a specified region. 94166b16edfSTang Chen * @base: the base phys addr of the region 94266b16edfSTang Chen * @size: the size of the region 94366b16edfSTang Chen * 94447cec443SMike Rapoport * Return: 0 on success, -errno on failure. 94566b16edfSTang Chen */ 94666b16edfSTang Chen int __init_memblock memblock_clear_hotplug(phys_addr_t base, phys_addr_t size) 94766b16edfSTang Chen { 948*ee8d2071SUsama Arif return memblock_setclr_flag(&memblock.memory, base, size, 0, MEMBLOCK_HOTPLUG); 94966b16edfSTang Chen } 95066b16edfSTang Chen 95166b16edfSTang Chen /** 952a3f5bafcSTony Luck * memblock_mark_mirror - Mark mirrored memory with flag MEMBLOCK_MIRROR. 953a3f5bafcSTony Luck * @base: the base phys addr of the region 954a3f5bafcSTony Luck * @size: the size of the region 955a3f5bafcSTony Luck * 95647cec443SMike Rapoport * Return: 0 on success, -errno on failure. 957a3f5bafcSTony Luck */ 958a3f5bafcSTony Luck int __init_memblock memblock_mark_mirror(phys_addr_t base, phys_addr_t size) 959a3f5bafcSTony Luck { 960902c2d91SMa Wupeng if (!mirrored_kernelcore) 961902c2d91SMa Wupeng return 0; 962902c2d91SMa Wupeng 963a3f5bafcSTony Luck system_has_some_mirror = true; 964a3f5bafcSTony Luck 965*ee8d2071SUsama Arif return memblock_setclr_flag(&memblock.memory, base, size, 1, MEMBLOCK_MIRROR); 966a3f5bafcSTony Luck } 967a3f5bafcSTony Luck 968bf3d3cc5SArd Biesheuvel /** 969bf3d3cc5SArd Biesheuvel * memblock_mark_nomap - Mark a memory region with flag MEMBLOCK_NOMAP. 970bf3d3cc5SArd Biesheuvel * @base: the base phys addr of the region 971bf3d3cc5SArd Biesheuvel * @size: the size of the region 972bf3d3cc5SArd Biesheuvel * 9739092d4f7SMike Rapoport * The memory regions marked with %MEMBLOCK_NOMAP will not be added to the 9749092d4f7SMike Rapoport * direct mapping of the physical memory. These regions will still be 9759092d4f7SMike Rapoport * covered by the memory map. The struct page representing NOMAP memory 9769092d4f7SMike Rapoport * frames in the memory map will be PageReserved() 9779092d4f7SMike Rapoport * 978658aafc8SMike Rapoport * Note: if the memory being marked %MEMBLOCK_NOMAP was allocated from 979658aafc8SMike Rapoport * memblock, the caller must inform kmemleak to ignore that memory 980658aafc8SMike Rapoport * 98147cec443SMike Rapoport * Return: 0 on success, -errno on failure. 982bf3d3cc5SArd Biesheuvel */ 983bf3d3cc5SArd Biesheuvel int __init_memblock memblock_mark_nomap(phys_addr_t base, phys_addr_t size) 984bf3d3cc5SArd Biesheuvel { 985*ee8d2071SUsama Arif return memblock_setclr_flag(&memblock.memory, base, size, 1, MEMBLOCK_NOMAP); 986bf3d3cc5SArd Biesheuvel } 987a3f5bafcSTony Luck 988a3f5bafcSTony Luck /** 9894c546b8aSAKASHI Takahiro * memblock_clear_nomap - Clear flag MEMBLOCK_NOMAP for a specified region. 9904c546b8aSAKASHI Takahiro * @base: the base phys addr of the region 9914c546b8aSAKASHI Takahiro * @size: the size of the region 9924c546b8aSAKASHI Takahiro * 99347cec443SMike Rapoport * Return: 0 on success, -errno on failure. 9944c546b8aSAKASHI Takahiro */ 9954c546b8aSAKASHI Takahiro int __init_memblock memblock_clear_nomap(phys_addr_t base, phys_addr_t size) 9964c546b8aSAKASHI Takahiro { 997*ee8d2071SUsama Arif return memblock_setclr_flag(&memblock.memory, base, size, 0, MEMBLOCK_NOMAP); 9984c546b8aSAKASHI Takahiro } 9994c546b8aSAKASHI Takahiro 10009f3d5eaaSMike Rapoport static bool should_skip_region(struct memblock_type *type, 10019f3d5eaaSMike Rapoport struct memblock_region *m, 10029f3d5eaaSMike Rapoport int nid, int flags) 1003c9a688a3SMike Rapoport { 1004c9a688a3SMike Rapoport int m_nid = memblock_get_region_node(m); 1005c9a688a3SMike Rapoport 10069f3d5eaaSMike Rapoport /* we never skip regions when iterating memblock.reserved or physmem */ 10079f3d5eaaSMike Rapoport if (type != memblock_memory) 10089f3d5eaaSMike Rapoport return false; 10099f3d5eaaSMike Rapoport 1010c9a688a3SMike Rapoport /* only memory regions are associated with nodes, check it */ 1011c9a688a3SMike Rapoport if (nid != NUMA_NO_NODE && nid != m_nid) 1012c9a688a3SMike Rapoport return true; 1013c9a688a3SMike Rapoport 1014c9a688a3SMike Rapoport /* skip hotpluggable memory regions if needed */ 101579e482e9SMike Rapoport if (movable_node_is_enabled() && memblock_is_hotpluggable(m) && 101679e482e9SMike Rapoport !(flags & MEMBLOCK_HOTPLUG)) 1017c9a688a3SMike Rapoport return true; 1018c9a688a3SMike Rapoport 1019c9a688a3SMike Rapoport /* if we want mirror memory skip non-mirror memory regions */ 1020c9a688a3SMike Rapoport if ((flags & MEMBLOCK_MIRROR) && !memblock_is_mirror(m)) 1021c9a688a3SMike Rapoport return true; 1022c9a688a3SMike Rapoport 1023c9a688a3SMike Rapoport /* skip nomap memory unless we were asked for it explicitly */ 1024c9a688a3SMike Rapoport if (!(flags & MEMBLOCK_NOMAP) && memblock_is_nomap(m)) 1025c9a688a3SMike Rapoport return true; 1026c9a688a3SMike Rapoport 1027f7892d8eSDavid Hildenbrand /* skip driver-managed memory unless we were asked for it explicitly */ 1028f7892d8eSDavid Hildenbrand if (!(flags & MEMBLOCK_DRIVER_MANAGED) && memblock_is_driver_managed(m)) 1029f7892d8eSDavid Hildenbrand return true; 1030f7892d8eSDavid Hildenbrand 1031c9a688a3SMike Rapoport return false; 1032c9a688a3SMike Rapoport } 1033c9a688a3SMike Rapoport 10348e7a7f86SRobin Holt /** 1035a2974133SMike Rapoport * __next_mem_range - next function for for_each_free_mem_range() etc. 103635fd0808STejun Heo * @idx: pointer to u64 loop variable 1037b1154233SGrygorii Strashko * @nid: node selector, %NUMA_NO_NODE for all nodes 1038fc6daaf9STony Luck * @flags: pick from blocks based on memory attributes 1039f1af9d3aSPhilipp Hachtmann * @type_a: pointer to memblock_type from where the range is taken 1040f1af9d3aSPhilipp Hachtmann * @type_b: pointer to memblock_type which excludes memory from being taken 1041dad7557eSWanpeng Li * @out_start: ptr to phys_addr_t for start address of the range, can be %NULL 1042dad7557eSWanpeng Li * @out_end: ptr to phys_addr_t for end address of the range, can be %NULL 1043dad7557eSWanpeng Li * @out_nid: ptr to int for nid of the range, can be %NULL 104435fd0808STejun Heo * 1045f1af9d3aSPhilipp Hachtmann * Find the first area from *@idx which matches @nid, fill the out 104635fd0808STejun Heo * parameters, and update *@idx for the next iteration. The lower 32bit of 1047f1af9d3aSPhilipp Hachtmann * *@idx contains index into type_a and the upper 32bit indexes the 1048f1af9d3aSPhilipp Hachtmann * areas before each region in type_b. For example, if type_b regions 104935fd0808STejun Heo * look like the following, 105035fd0808STejun Heo * 105135fd0808STejun Heo * 0:[0-16), 1:[32-48), 2:[128-130) 105235fd0808STejun Heo * 105335fd0808STejun Heo * The upper 32bit indexes the following regions. 105435fd0808STejun Heo * 105535fd0808STejun Heo * 0:[0-0), 1:[16-32), 2:[48-128), 3:[130-MAX) 105635fd0808STejun Heo * 105735fd0808STejun Heo * As both region arrays are sorted, the function advances the two indices 105835fd0808STejun Heo * in lockstep and returns each intersection. 105935fd0808STejun Heo */ 106077649905SDavid Hildenbrand void __next_mem_range(u64 *idx, int nid, enum memblock_flags flags, 1061f1af9d3aSPhilipp Hachtmann struct memblock_type *type_a, 106277649905SDavid Hildenbrand struct memblock_type *type_b, phys_addr_t *out_start, 106335fd0808STejun Heo phys_addr_t *out_end, int *out_nid) 106435fd0808STejun Heo { 1065f1af9d3aSPhilipp Hachtmann int idx_a = *idx & 0xffffffff; 1066f1af9d3aSPhilipp Hachtmann int idx_b = *idx >> 32; 1067b1154233SGrygorii Strashko 1068f1af9d3aSPhilipp Hachtmann if (WARN_ONCE(nid == MAX_NUMNODES, 1069f1af9d3aSPhilipp Hachtmann "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n")) 1070560dca27SGrygorii Strashko nid = NUMA_NO_NODE; 107135fd0808STejun Heo 1072f1af9d3aSPhilipp Hachtmann for (; idx_a < type_a->cnt; idx_a++) { 1073f1af9d3aSPhilipp Hachtmann struct memblock_region *m = &type_a->regions[idx_a]; 1074f1af9d3aSPhilipp Hachtmann 107535fd0808STejun Heo phys_addr_t m_start = m->base; 107635fd0808STejun Heo phys_addr_t m_end = m->base + m->size; 1077f1af9d3aSPhilipp Hachtmann int m_nid = memblock_get_region_node(m); 107835fd0808STejun Heo 10799f3d5eaaSMike Rapoport if (should_skip_region(type_a, m, nid, flags)) 1080bf3d3cc5SArd Biesheuvel continue; 1081bf3d3cc5SArd Biesheuvel 1082f1af9d3aSPhilipp Hachtmann if (!type_b) { 1083f1af9d3aSPhilipp Hachtmann if (out_start) 1084f1af9d3aSPhilipp Hachtmann *out_start = m_start; 1085f1af9d3aSPhilipp Hachtmann if (out_end) 1086f1af9d3aSPhilipp Hachtmann *out_end = m_end; 1087f1af9d3aSPhilipp Hachtmann if (out_nid) 1088f1af9d3aSPhilipp Hachtmann *out_nid = m_nid; 1089f1af9d3aSPhilipp Hachtmann idx_a++; 1090f1af9d3aSPhilipp Hachtmann *idx = (u32)idx_a | (u64)idx_b << 32; 1091f1af9d3aSPhilipp Hachtmann return; 1092f1af9d3aSPhilipp Hachtmann } 109335fd0808STejun Heo 1094f1af9d3aSPhilipp Hachtmann /* scan areas before each reservation */ 1095f1af9d3aSPhilipp Hachtmann for (; idx_b < type_b->cnt + 1; idx_b++) { 1096f1af9d3aSPhilipp Hachtmann struct memblock_region *r; 1097f1af9d3aSPhilipp Hachtmann phys_addr_t r_start; 1098f1af9d3aSPhilipp Hachtmann phys_addr_t r_end; 1099f1af9d3aSPhilipp Hachtmann 1100f1af9d3aSPhilipp Hachtmann r = &type_b->regions[idx_b]; 1101f1af9d3aSPhilipp Hachtmann r_start = idx_b ? r[-1].base + r[-1].size : 0; 1102f1af9d3aSPhilipp Hachtmann r_end = idx_b < type_b->cnt ? 11031c4bc43dSStefan Agner r->base : PHYS_ADDR_MAX; 1104f1af9d3aSPhilipp Hachtmann 1105f1af9d3aSPhilipp Hachtmann /* 1106f1af9d3aSPhilipp Hachtmann * if idx_b advanced past idx_a, 1107f1af9d3aSPhilipp Hachtmann * break out to advance idx_a 1108f1af9d3aSPhilipp Hachtmann */ 110935fd0808STejun Heo if (r_start >= m_end) 111035fd0808STejun Heo break; 111135fd0808STejun Heo /* if the two regions intersect, we're done */ 111235fd0808STejun Heo if (m_start < r_end) { 111335fd0808STejun Heo if (out_start) 1114f1af9d3aSPhilipp Hachtmann *out_start = 1115f1af9d3aSPhilipp Hachtmann max(m_start, r_start); 111635fd0808STejun Heo if (out_end) 111735fd0808STejun Heo *out_end = min(m_end, r_end); 111835fd0808STejun Heo if (out_nid) 1119f1af9d3aSPhilipp Hachtmann *out_nid = m_nid; 112035fd0808STejun Heo /* 1121f1af9d3aSPhilipp Hachtmann * The region which ends first is 1122f1af9d3aSPhilipp Hachtmann * advanced for the next iteration. 112335fd0808STejun Heo */ 112435fd0808STejun Heo if (m_end <= r_end) 1125f1af9d3aSPhilipp Hachtmann idx_a++; 112635fd0808STejun Heo else 1127f1af9d3aSPhilipp Hachtmann idx_b++; 1128f1af9d3aSPhilipp Hachtmann *idx = (u32)idx_a | (u64)idx_b << 32; 112935fd0808STejun Heo return; 113035fd0808STejun Heo } 113135fd0808STejun Heo } 113235fd0808STejun Heo } 113335fd0808STejun Heo 113435fd0808STejun Heo /* signal end of iteration */ 113535fd0808STejun Heo *idx = ULLONG_MAX; 113635fd0808STejun Heo } 113735fd0808STejun Heo 11387bd0b0f0STejun Heo /** 1139f1af9d3aSPhilipp Hachtmann * __next_mem_range_rev - generic next function for for_each_*_range_rev() 1140f1af9d3aSPhilipp Hachtmann * 11417bd0b0f0STejun Heo * @idx: pointer to u64 loop variable 1142ad5ea8cdSAlexander Kuleshov * @nid: node selector, %NUMA_NO_NODE for all nodes 1143fc6daaf9STony Luck * @flags: pick from blocks based on memory attributes 1144f1af9d3aSPhilipp Hachtmann * @type_a: pointer to memblock_type from where the range is taken 1145f1af9d3aSPhilipp Hachtmann * @type_b: pointer to memblock_type which excludes memory from being taken 1146dad7557eSWanpeng Li * @out_start: ptr to phys_addr_t for start address of the range, can be %NULL 1147dad7557eSWanpeng Li * @out_end: ptr to phys_addr_t for end address of the range, can be %NULL 1148dad7557eSWanpeng Li * @out_nid: ptr to int for nid of the range, can be %NULL 11497bd0b0f0STejun Heo * 115047cec443SMike Rapoport * Finds the next range from type_a which is not marked as unsuitable 115147cec443SMike Rapoport * in type_b. 115247cec443SMike Rapoport * 1153f1af9d3aSPhilipp Hachtmann * Reverse of __next_mem_range(). 11547bd0b0f0STejun Heo */ 1155e1720feeSMike Rapoport void __init_memblock __next_mem_range_rev(u64 *idx, int nid, 1156e1720feeSMike Rapoport enum memblock_flags flags, 1157f1af9d3aSPhilipp Hachtmann struct memblock_type *type_a, 1158f1af9d3aSPhilipp Hachtmann struct memblock_type *type_b, 11597bd0b0f0STejun Heo phys_addr_t *out_start, 11607bd0b0f0STejun Heo phys_addr_t *out_end, int *out_nid) 11617bd0b0f0STejun Heo { 1162f1af9d3aSPhilipp Hachtmann int idx_a = *idx & 0xffffffff; 1163f1af9d3aSPhilipp Hachtmann int idx_b = *idx >> 32; 1164b1154233SGrygorii Strashko 1165560dca27SGrygorii Strashko if (WARN_ONCE(nid == MAX_NUMNODES, "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n")) 1166560dca27SGrygorii Strashko nid = NUMA_NO_NODE; 11677bd0b0f0STejun Heo 11687bd0b0f0STejun Heo if (*idx == (u64)ULLONG_MAX) { 1169f1af9d3aSPhilipp Hachtmann idx_a = type_a->cnt - 1; 1170e47608abSzijun_hu if (type_b != NULL) 1171f1af9d3aSPhilipp Hachtmann idx_b = type_b->cnt; 1172e47608abSzijun_hu else 1173e47608abSzijun_hu idx_b = 0; 11747bd0b0f0STejun Heo } 11757bd0b0f0STejun Heo 1176f1af9d3aSPhilipp Hachtmann for (; idx_a >= 0; idx_a--) { 1177f1af9d3aSPhilipp Hachtmann struct memblock_region *m = &type_a->regions[idx_a]; 1178f1af9d3aSPhilipp Hachtmann 11797bd0b0f0STejun Heo phys_addr_t m_start = m->base; 11807bd0b0f0STejun Heo phys_addr_t m_end = m->base + m->size; 1181f1af9d3aSPhilipp Hachtmann int m_nid = memblock_get_region_node(m); 11827bd0b0f0STejun Heo 11839f3d5eaaSMike Rapoport if (should_skip_region(type_a, m, nid, flags)) 1184bf3d3cc5SArd Biesheuvel continue; 1185bf3d3cc5SArd Biesheuvel 1186f1af9d3aSPhilipp Hachtmann if (!type_b) { 1187f1af9d3aSPhilipp Hachtmann if (out_start) 1188f1af9d3aSPhilipp Hachtmann *out_start = m_start; 1189f1af9d3aSPhilipp Hachtmann if (out_end) 1190f1af9d3aSPhilipp Hachtmann *out_end = m_end; 1191f1af9d3aSPhilipp Hachtmann if (out_nid) 1192f1af9d3aSPhilipp Hachtmann *out_nid = m_nid; 1193fb399b48Szijun_hu idx_a--; 1194f1af9d3aSPhilipp Hachtmann *idx = (u32)idx_a | (u64)idx_b << 32; 1195f1af9d3aSPhilipp Hachtmann return; 1196f1af9d3aSPhilipp Hachtmann } 11977bd0b0f0STejun Heo 1198f1af9d3aSPhilipp Hachtmann /* scan areas before each reservation */ 1199f1af9d3aSPhilipp Hachtmann for (; idx_b >= 0; idx_b--) { 1200f1af9d3aSPhilipp Hachtmann struct memblock_region *r; 1201f1af9d3aSPhilipp Hachtmann phys_addr_t r_start; 1202f1af9d3aSPhilipp Hachtmann phys_addr_t r_end; 1203f1af9d3aSPhilipp Hachtmann 1204f1af9d3aSPhilipp Hachtmann r = &type_b->regions[idx_b]; 1205f1af9d3aSPhilipp Hachtmann r_start = idx_b ? r[-1].base + r[-1].size : 0; 1206f1af9d3aSPhilipp Hachtmann r_end = idx_b < type_b->cnt ? 12071c4bc43dSStefan Agner r->base : PHYS_ADDR_MAX; 1208f1af9d3aSPhilipp Hachtmann /* 1209f1af9d3aSPhilipp Hachtmann * if idx_b advanced past idx_a, 1210f1af9d3aSPhilipp Hachtmann * break out to advance idx_a 1211f1af9d3aSPhilipp Hachtmann */ 1212f1af9d3aSPhilipp Hachtmann 12137bd0b0f0STejun Heo if (r_end <= m_start) 12147bd0b0f0STejun Heo break; 12157bd0b0f0STejun Heo /* if the two regions intersect, we're done */ 12167bd0b0f0STejun Heo if (m_end > r_start) { 12177bd0b0f0STejun Heo if (out_start) 12187bd0b0f0STejun Heo *out_start = max(m_start, r_start); 12197bd0b0f0STejun Heo if (out_end) 12207bd0b0f0STejun Heo *out_end = min(m_end, r_end); 12217bd0b0f0STejun Heo if (out_nid) 1222f1af9d3aSPhilipp Hachtmann *out_nid = m_nid; 12237bd0b0f0STejun Heo if (m_start >= r_start) 1224f1af9d3aSPhilipp Hachtmann idx_a--; 12257bd0b0f0STejun Heo else 1226f1af9d3aSPhilipp Hachtmann idx_b--; 1227f1af9d3aSPhilipp Hachtmann *idx = (u32)idx_a | (u64)idx_b << 32; 12287bd0b0f0STejun Heo return; 12297bd0b0f0STejun Heo } 12307bd0b0f0STejun Heo } 12317bd0b0f0STejun Heo } 1232f1af9d3aSPhilipp Hachtmann /* signal end of iteration */ 12337bd0b0f0STejun Heo *idx = ULLONG_MAX; 12347bd0b0f0STejun Heo } 12357bd0b0f0STejun Heo 12367c0caeb8STejun Heo /* 123745e79815SChen Chang * Common iterator interface used to define for_each_mem_pfn_range(). 12387c0caeb8STejun Heo */ 12397c0caeb8STejun Heo void __init_memblock __next_mem_pfn_range(int *idx, int nid, 12407c0caeb8STejun Heo unsigned long *out_start_pfn, 12417c0caeb8STejun Heo unsigned long *out_end_pfn, int *out_nid) 12427c0caeb8STejun Heo { 12437c0caeb8STejun Heo struct memblock_type *type = &memblock.memory; 12447c0caeb8STejun Heo struct memblock_region *r; 1245d622abf7SMike Rapoport int r_nid; 12467c0caeb8STejun Heo 12477c0caeb8STejun Heo while (++*idx < type->cnt) { 12487c0caeb8STejun Heo r = &type->regions[*idx]; 1249d622abf7SMike Rapoport r_nid = memblock_get_region_node(r); 12507c0caeb8STejun Heo 12517c0caeb8STejun Heo if (PFN_UP(r->base) >= PFN_DOWN(r->base + r->size)) 12527c0caeb8STejun Heo continue; 1253d622abf7SMike Rapoport if (nid == MAX_NUMNODES || nid == r_nid) 12547c0caeb8STejun Heo break; 12557c0caeb8STejun Heo } 12567c0caeb8STejun Heo if (*idx >= type->cnt) { 12577c0caeb8STejun Heo *idx = -1; 12587c0caeb8STejun Heo return; 12597c0caeb8STejun Heo } 12607c0caeb8STejun Heo 12617c0caeb8STejun Heo if (out_start_pfn) 12627c0caeb8STejun Heo *out_start_pfn = PFN_UP(r->base); 12637c0caeb8STejun Heo if (out_end_pfn) 12647c0caeb8STejun Heo *out_end_pfn = PFN_DOWN(r->base + r->size); 12657c0caeb8STejun Heo if (out_nid) 1266d622abf7SMike Rapoport *out_nid = r_nid; 12677c0caeb8STejun Heo } 12687c0caeb8STejun Heo 12697c0caeb8STejun Heo /** 12707c0caeb8STejun Heo * memblock_set_node - set node ID on memblock regions 12717c0caeb8STejun Heo * @base: base of area to set node ID for 12727c0caeb8STejun Heo * @size: size of area to set node ID for 1273e7e8de59STang Chen * @type: memblock type to set node ID for 12747c0caeb8STejun Heo * @nid: node ID to set 12757c0caeb8STejun Heo * 1276e7e8de59STang Chen * Set the nid of memblock @type regions in [@base, @base + @size) to @nid. 12777c0caeb8STejun Heo * Regions which cross the area boundaries are split as necessary. 12787c0caeb8STejun Heo * 127947cec443SMike Rapoport * Return: 12807c0caeb8STejun Heo * 0 on success, -errno on failure. 12817c0caeb8STejun Heo */ 12827c0caeb8STejun Heo int __init_memblock memblock_set_node(phys_addr_t base, phys_addr_t size, 1283e7e8de59STang Chen struct memblock_type *type, int nid) 12847c0caeb8STejun Heo { 1285a9ee6cf5SMike Rapoport #ifdef CONFIG_NUMA 12866a9ceb31STejun Heo int start_rgn, end_rgn; 12876a9ceb31STejun Heo int i, ret; 12887c0caeb8STejun Heo 12896a9ceb31STejun Heo ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); 12906a9ceb31STejun Heo if (ret) 12916a9ceb31STejun Heo return ret; 12927c0caeb8STejun Heo 12936a9ceb31STejun Heo for (i = start_rgn; i < end_rgn; i++) 1294e9d24ad3SWanpeng Li memblock_set_region_node(&type->regions[i], nid); 12957c0caeb8STejun Heo 12962fe03412SPeng Zhang memblock_merge_regions(type, start_rgn, end_rgn); 12973f08a302SMike Rapoport #endif 12987c0caeb8STejun Heo return 0; 12997c0caeb8STejun Heo } 13003f08a302SMike Rapoport 1301837566e7SAlexander Duyck #ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT 1302837566e7SAlexander Duyck /** 1303837566e7SAlexander Duyck * __next_mem_pfn_range_in_zone - iterator for for_each_*_range_in_zone() 1304837566e7SAlexander Duyck * 1305837566e7SAlexander Duyck * @idx: pointer to u64 loop variable 1306837566e7SAlexander Duyck * @zone: zone in which all of the memory blocks reside 1307837566e7SAlexander Duyck * @out_spfn: ptr to ulong for start pfn of the range, can be %NULL 1308837566e7SAlexander Duyck * @out_epfn: ptr to ulong for end pfn of the range, can be %NULL 1309837566e7SAlexander Duyck * 1310837566e7SAlexander Duyck * This function is meant to be a zone/pfn specific wrapper for the 1311837566e7SAlexander Duyck * for_each_mem_range type iterators. Specifically they are used in the 1312837566e7SAlexander Duyck * deferred memory init routines and as such we were duplicating much of 1313837566e7SAlexander Duyck * this logic throughout the code. So instead of having it in multiple 1314837566e7SAlexander Duyck * locations it seemed like it would make more sense to centralize this to 1315837566e7SAlexander Duyck * one new iterator that does everything they need. 1316837566e7SAlexander Duyck */ 1317837566e7SAlexander Duyck void __init_memblock 1318837566e7SAlexander Duyck __next_mem_pfn_range_in_zone(u64 *idx, struct zone *zone, 1319837566e7SAlexander Duyck unsigned long *out_spfn, unsigned long *out_epfn) 1320837566e7SAlexander Duyck { 1321837566e7SAlexander Duyck int zone_nid = zone_to_nid(zone); 1322837566e7SAlexander Duyck phys_addr_t spa, epa; 1323837566e7SAlexander Duyck 1324837566e7SAlexander Duyck __next_mem_range(idx, zone_nid, MEMBLOCK_NONE, 1325837566e7SAlexander Duyck &memblock.memory, &memblock.reserved, 1326f30b002cSMiaohe Lin &spa, &epa, NULL); 1327837566e7SAlexander Duyck 1328837566e7SAlexander Duyck while (*idx != U64_MAX) { 1329837566e7SAlexander Duyck unsigned long epfn = PFN_DOWN(epa); 1330837566e7SAlexander Duyck unsigned long spfn = PFN_UP(spa); 1331837566e7SAlexander Duyck 1332837566e7SAlexander Duyck /* 1333837566e7SAlexander Duyck * Verify the end is at least past the start of the zone and 1334837566e7SAlexander Duyck * that we have at least one PFN to initialize. 1335837566e7SAlexander Duyck */ 1336837566e7SAlexander Duyck if (zone->zone_start_pfn < epfn && spfn < epfn) { 1337837566e7SAlexander Duyck /* if we went too far just stop searching */ 1338837566e7SAlexander Duyck if (zone_end_pfn(zone) <= spfn) { 1339837566e7SAlexander Duyck *idx = U64_MAX; 1340837566e7SAlexander Duyck break; 1341837566e7SAlexander Duyck } 1342837566e7SAlexander Duyck 1343837566e7SAlexander Duyck if (out_spfn) 1344837566e7SAlexander Duyck *out_spfn = max(zone->zone_start_pfn, spfn); 1345837566e7SAlexander Duyck if (out_epfn) 1346837566e7SAlexander Duyck *out_epfn = min(zone_end_pfn(zone), epfn); 1347837566e7SAlexander Duyck 1348837566e7SAlexander Duyck return; 1349837566e7SAlexander Duyck } 1350837566e7SAlexander Duyck 1351837566e7SAlexander Duyck __next_mem_range(idx, zone_nid, MEMBLOCK_NONE, 1352837566e7SAlexander Duyck &memblock.memory, &memblock.reserved, 1353f30b002cSMiaohe Lin &spa, &epa, NULL); 1354837566e7SAlexander Duyck } 1355837566e7SAlexander Duyck 1356837566e7SAlexander Duyck /* signal end of iteration */ 1357837566e7SAlexander Duyck if (out_spfn) 1358837566e7SAlexander Duyck *out_spfn = ULONG_MAX; 1359837566e7SAlexander Duyck if (out_epfn) 1360837566e7SAlexander Duyck *out_epfn = 0; 1361837566e7SAlexander Duyck } 1362837566e7SAlexander Duyck 1363837566e7SAlexander Duyck #endif /* CONFIG_DEFERRED_STRUCT_PAGE_INIT */ 13647c0caeb8STejun Heo 136592d12f95SMike Rapoport /** 136692d12f95SMike Rapoport * memblock_alloc_range_nid - allocate boot memory block 136792d12f95SMike Rapoport * @size: size of memory block to be allocated in bytes 136892d12f95SMike Rapoport * @align: alignment of the region and block's size 136992d12f95SMike Rapoport * @start: the lower bound of the memory region to allocate (phys address) 137092d12f95SMike Rapoport * @end: the upper bound of the memory region to allocate (phys address) 137192d12f95SMike Rapoport * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 13720ac398b1SYunfeng Ye * @exact_nid: control the allocation fall back to other nodes 137392d12f95SMike Rapoport * 137492d12f95SMike Rapoport * The allocation is performed from memory region limited by 137595830666SCao jin * memblock.current_limit if @end == %MEMBLOCK_ALLOC_ACCESSIBLE. 137692d12f95SMike Rapoport * 13770ac398b1SYunfeng Ye * If the specified node can not hold the requested memory and @exact_nid 13780ac398b1SYunfeng Ye * is false, the allocation falls back to any node in the system. 137992d12f95SMike Rapoport * 138092d12f95SMike Rapoport * For systems with memory mirroring, the allocation is attempted first 138192d12f95SMike Rapoport * from the regions with mirroring enabled and then retried from any 138292d12f95SMike Rapoport * memory region. 138392d12f95SMike Rapoport * 1384c200d900SPatrick Wang * In addition, function using kmemleak_alloc_phys for allocated boot 1385c200d900SPatrick Wang * memory block, it is never reported as leaks. 138692d12f95SMike Rapoport * 138792d12f95SMike Rapoport * Return: 138892d12f95SMike Rapoport * Physical address of allocated memory block on success, %0 on failure. 138992d12f95SMike Rapoport */ 13908676af1fSAslan Bakirov phys_addr_t __init memblock_alloc_range_nid(phys_addr_t size, 13912bfc2862SAkinobu Mita phys_addr_t align, phys_addr_t start, 13920ac398b1SYunfeng Ye phys_addr_t end, int nid, 13930ac398b1SYunfeng Ye bool exact_nid) 139495f72d1eSYinghai Lu { 139592d12f95SMike Rapoport enum memblock_flags flags = choose_memblock_flags(); 13966ed311b2SBenjamin Herrenschmidt phys_addr_t found; 139795f72d1eSYinghai Lu 139892d12f95SMike Rapoport if (WARN_ONCE(nid == MAX_NUMNODES, "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n")) 139992d12f95SMike Rapoport nid = NUMA_NO_NODE; 140092d12f95SMike Rapoport 14012f770806SMike Rapoport if (!align) { 14022f770806SMike Rapoport /* Can't use WARNs this early in boot on powerpc */ 14032f770806SMike Rapoport dump_stack(); 14042f770806SMike Rapoport align = SMP_CACHE_BYTES; 14052f770806SMike Rapoport } 14062f770806SMike Rapoport 140792d12f95SMike Rapoport again: 1408fc6daaf9STony Luck found = memblock_find_in_range_node(size, align, start, end, nid, 1409fc6daaf9STony Luck flags); 141092d12f95SMike Rapoport if (found && !memblock_reserve(found, size)) 141192d12f95SMike Rapoport goto done; 141292d12f95SMike Rapoport 14130ac398b1SYunfeng Ye if (nid != NUMA_NO_NODE && !exact_nid) { 141492d12f95SMike Rapoport found = memblock_find_in_range_node(size, align, start, 141592d12f95SMike Rapoport end, NUMA_NO_NODE, 141692d12f95SMike Rapoport flags); 141792d12f95SMike Rapoport if (found && !memblock_reserve(found, size)) 141892d12f95SMike Rapoport goto done; 141992d12f95SMike Rapoport } 142092d12f95SMike Rapoport 142192d12f95SMike Rapoport if (flags & MEMBLOCK_MIRROR) { 142292d12f95SMike Rapoport flags &= ~MEMBLOCK_MIRROR; 142314d9a675SMa Wupeng pr_warn_ratelimited("Could not allocate %pap bytes of mirrored memory\n", 142492d12f95SMike Rapoport &size); 142592d12f95SMike Rapoport goto again; 142692d12f95SMike Rapoport } 142792d12f95SMike Rapoport 142892d12f95SMike Rapoport return 0; 142992d12f95SMike Rapoport 143092d12f95SMike Rapoport done: 1431c6975d7cSQian Cai /* 1432c6975d7cSQian Cai * Skip kmemleak for those places like kasan_init() and 1433c6975d7cSQian Cai * early_pgtable_alloc() due to high volume. 1434c6975d7cSQian Cai */ 1435c6975d7cSQian Cai if (end != MEMBLOCK_ALLOC_NOLEAKTRACE) 1436aedf95eaSCatalin Marinas /* 1437c200d900SPatrick Wang * Memblock allocated blocks are never reported as 1438c200d900SPatrick Wang * leaks. This is because many of these blocks are 1439c200d900SPatrick Wang * only referred via the physical address which is 1440c200d900SPatrick Wang * not looked up by kmemleak. 1441aedf95eaSCatalin Marinas */ 1442c200d900SPatrick Wang kmemleak_alloc_phys(found, size, 0); 144392d12f95SMike Rapoport 1444dcdfdd40SKirill A. Shutemov /* 1445dcdfdd40SKirill A. Shutemov * Some Virtual Machine platforms, such as Intel TDX or AMD SEV-SNP, 1446dcdfdd40SKirill A. Shutemov * require memory to be accepted before it can be used by the 1447dcdfdd40SKirill A. Shutemov * guest. 1448dcdfdd40SKirill A. Shutemov * 1449dcdfdd40SKirill A. Shutemov * Accept the memory of the allocated buffer. 1450dcdfdd40SKirill A. Shutemov */ 1451dcdfdd40SKirill A. Shutemov accept_memory(found, found + size); 1452dcdfdd40SKirill A. Shutemov 14536ed311b2SBenjamin Herrenschmidt return found; 1454aedf95eaSCatalin Marinas } 145595f72d1eSYinghai Lu 1456a2974133SMike Rapoport /** 1457a2974133SMike Rapoport * memblock_phys_alloc_range - allocate a memory block inside specified range 1458a2974133SMike Rapoport * @size: size of memory block to be allocated in bytes 1459a2974133SMike Rapoport * @align: alignment of the region and block's size 1460a2974133SMike Rapoport * @start: the lower bound of the memory region to allocate (physical address) 1461a2974133SMike Rapoport * @end: the upper bound of the memory region to allocate (physical address) 1462a2974133SMike Rapoport * 1463a2974133SMike Rapoport * Allocate @size bytes in the between @start and @end. 1464a2974133SMike Rapoport * 1465a2974133SMike Rapoport * Return: physical address of the allocated memory block on success, 1466a2974133SMike Rapoport * %0 on failure. 1467a2974133SMike Rapoport */ 14688a770c2aSMike Rapoport phys_addr_t __init memblock_phys_alloc_range(phys_addr_t size, 14698a770c2aSMike Rapoport phys_addr_t align, 14708a770c2aSMike Rapoport phys_addr_t start, 14718a770c2aSMike Rapoport phys_addr_t end) 14722bfc2862SAkinobu Mita { 1473b5cf2d6cSFaiyaz Mohammed memblock_dbg("%s: %llu bytes align=0x%llx from=%pa max_addr=%pa %pS\n", 1474b5cf2d6cSFaiyaz Mohammed __func__, (u64)size, (u64)align, &start, &end, 1475b5cf2d6cSFaiyaz Mohammed (void *)_RET_IP_); 14760ac398b1SYunfeng Ye return memblock_alloc_range_nid(size, align, start, end, NUMA_NO_NODE, 14770ac398b1SYunfeng Ye false); 14787bd0b0f0STejun Heo } 14797bd0b0f0STejun Heo 1480a2974133SMike Rapoport /** 148117cbe038SLevi Yun * memblock_phys_alloc_try_nid - allocate a memory block from specified NUMA node 1482a2974133SMike Rapoport * @size: size of memory block to be allocated in bytes 1483a2974133SMike Rapoport * @align: alignment of the region and block's size 1484a2974133SMike Rapoport * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 1485a2974133SMike Rapoport * 1486a2974133SMike Rapoport * Allocates memory block from the specified NUMA node. If the node 1487a2974133SMike Rapoport * has no available memory, attempts to allocated from any node in the 1488a2974133SMike Rapoport * system. 1489a2974133SMike Rapoport * 1490a2974133SMike Rapoport * Return: physical address of the allocated memory block on success, 1491a2974133SMike Rapoport * %0 on failure. 1492a2974133SMike Rapoport */ 14939a8dd708SMike Rapoport phys_addr_t __init memblock_phys_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid) 14949d1e2492SBenjamin Herrenschmidt { 149533755574SMike Rapoport return memblock_alloc_range_nid(size, align, 0, 14960ac398b1SYunfeng Ye MEMBLOCK_ALLOC_ACCESSIBLE, nid, false); 149795f72d1eSYinghai Lu } 149895f72d1eSYinghai Lu 149926f09e9bSSantosh Shilimkar /** 1500eb31d559SMike Rapoport * memblock_alloc_internal - allocate boot memory block 150126f09e9bSSantosh Shilimkar * @size: size of memory block to be allocated in bytes 150226f09e9bSSantosh Shilimkar * @align: alignment of the region and block's size 150326f09e9bSSantosh Shilimkar * @min_addr: the lower bound of the memory region to allocate (phys address) 150426f09e9bSSantosh Shilimkar * @max_addr: the upper bound of the memory region to allocate (phys address) 150526f09e9bSSantosh Shilimkar * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 15060ac398b1SYunfeng Ye * @exact_nid: control the allocation fall back to other nodes 150726f09e9bSSantosh Shilimkar * 150892d12f95SMike Rapoport * Allocates memory block using memblock_alloc_range_nid() and 150992d12f95SMike Rapoport * converts the returned physical address to virtual. 151092d12f95SMike Rapoport * 151126f09e9bSSantosh Shilimkar * The @min_addr limit is dropped if it can not be satisfied and the allocation 151292d12f95SMike Rapoport * will fall back to memory below @min_addr. Other constraints, such 151392d12f95SMike Rapoport * as node and mirrored memory will be handled again in 151492d12f95SMike Rapoport * memblock_alloc_range_nid(). 151526f09e9bSSantosh Shilimkar * 151647cec443SMike Rapoport * Return: 151726f09e9bSSantosh Shilimkar * Virtual address of allocated memory block on success, NULL on failure. 151826f09e9bSSantosh Shilimkar */ 1519eb31d559SMike Rapoport static void * __init memblock_alloc_internal( 152026f09e9bSSantosh Shilimkar phys_addr_t size, phys_addr_t align, 152126f09e9bSSantosh Shilimkar phys_addr_t min_addr, phys_addr_t max_addr, 15220ac398b1SYunfeng Ye int nid, bool exact_nid) 152326f09e9bSSantosh Shilimkar { 152426f09e9bSSantosh Shilimkar phys_addr_t alloc; 152526f09e9bSSantosh Shilimkar 152626f09e9bSSantosh Shilimkar /* 152726f09e9bSSantosh Shilimkar * Detect any accidental use of these APIs after slab is ready, as at 152826f09e9bSSantosh Shilimkar * this moment memblock may be deinitialized already and its 1529c6ffc5caSMike Rapoport * internal data may be destroyed (after execution of memblock_free_all) 153026f09e9bSSantosh Shilimkar */ 153126f09e9bSSantosh Shilimkar if (WARN_ON_ONCE(slab_is_available())) 153226f09e9bSSantosh Shilimkar return kzalloc_node(size, GFP_NOWAIT, nid); 153326f09e9bSSantosh Shilimkar 1534f3057ad7SMike Rapoport if (max_addr > memblock.current_limit) 1535f3057ad7SMike Rapoport max_addr = memblock.current_limit; 1536f3057ad7SMike Rapoport 15370ac398b1SYunfeng Ye alloc = memblock_alloc_range_nid(size, align, min_addr, max_addr, nid, 15380ac398b1SYunfeng Ye exact_nid); 15392f770806SMike Rapoport 154092d12f95SMike Rapoport /* retry allocation without lower limit */ 154192d12f95SMike Rapoport if (!alloc && min_addr) 15420ac398b1SYunfeng Ye alloc = memblock_alloc_range_nid(size, align, 0, max_addr, nid, 15430ac398b1SYunfeng Ye exact_nid); 154426f09e9bSSantosh Shilimkar 154592d12f95SMike Rapoport if (!alloc) 1546a3f5bafcSTony Luck return NULL; 154726f09e9bSSantosh Shilimkar 154892d12f95SMike Rapoport return phys_to_virt(alloc); 154926f09e9bSSantosh Shilimkar } 155026f09e9bSSantosh Shilimkar 155126f09e9bSSantosh Shilimkar /** 15520ac398b1SYunfeng Ye * memblock_alloc_exact_nid_raw - allocate boot memory block on the exact node 15530ac398b1SYunfeng Ye * without zeroing memory 15540ac398b1SYunfeng Ye * @size: size of memory block to be allocated in bytes 15550ac398b1SYunfeng Ye * @align: alignment of the region and block's size 15560ac398b1SYunfeng Ye * @min_addr: the lower bound of the memory region from where the allocation 15570ac398b1SYunfeng Ye * is preferred (phys address) 15580ac398b1SYunfeng Ye * @max_addr: the upper bound of the memory region from where the allocation 15590ac398b1SYunfeng Ye * is preferred (phys address), or %MEMBLOCK_ALLOC_ACCESSIBLE to 15600ac398b1SYunfeng Ye * allocate only from memory limited by memblock.current_limit value 15610ac398b1SYunfeng Ye * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 15620ac398b1SYunfeng Ye * 15630ac398b1SYunfeng Ye * Public function, provides additional debug information (including caller 15640ac398b1SYunfeng Ye * info), if enabled. Does not zero allocated memory. 15650ac398b1SYunfeng Ye * 15660ac398b1SYunfeng Ye * Return: 15670ac398b1SYunfeng Ye * Virtual address of allocated memory block on success, NULL on failure. 15680ac398b1SYunfeng Ye */ 15690ac398b1SYunfeng Ye void * __init memblock_alloc_exact_nid_raw( 15700ac398b1SYunfeng Ye phys_addr_t size, phys_addr_t align, 15710ac398b1SYunfeng Ye phys_addr_t min_addr, phys_addr_t max_addr, 15720ac398b1SYunfeng Ye int nid) 15730ac398b1SYunfeng Ye { 15740ac398b1SYunfeng Ye memblock_dbg("%s: %llu bytes align=0x%llx nid=%d from=%pa max_addr=%pa %pS\n", 15750ac398b1SYunfeng Ye __func__, (u64)size, (u64)align, nid, &min_addr, 15760ac398b1SYunfeng Ye &max_addr, (void *)_RET_IP_); 15770ac398b1SYunfeng Ye 157808678804SMike Rapoport return memblock_alloc_internal(size, align, min_addr, max_addr, nid, 157908678804SMike Rapoport true); 15800ac398b1SYunfeng Ye } 15810ac398b1SYunfeng Ye 15820ac398b1SYunfeng Ye /** 1583eb31d559SMike Rapoport * memblock_alloc_try_nid_raw - allocate boot memory block without zeroing 1584ea1f5f37SPavel Tatashin * memory and without panicking 1585ea1f5f37SPavel Tatashin * @size: size of memory block to be allocated in bytes 1586ea1f5f37SPavel Tatashin * @align: alignment of the region and block's size 1587ea1f5f37SPavel Tatashin * @min_addr: the lower bound of the memory region from where the allocation 1588ea1f5f37SPavel Tatashin * is preferred (phys address) 1589ea1f5f37SPavel Tatashin * @max_addr: the upper bound of the memory region from where the allocation 159097ad1087SMike Rapoport * is preferred (phys address), or %MEMBLOCK_ALLOC_ACCESSIBLE to 1591ea1f5f37SPavel Tatashin * allocate only from memory limited by memblock.current_limit value 1592ea1f5f37SPavel Tatashin * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 1593ea1f5f37SPavel Tatashin * 1594ea1f5f37SPavel Tatashin * Public function, provides additional debug information (including caller 1595ea1f5f37SPavel Tatashin * info), if enabled. Does not zero allocated memory, does not panic if request 1596ea1f5f37SPavel Tatashin * cannot be satisfied. 1597ea1f5f37SPavel Tatashin * 159847cec443SMike Rapoport * Return: 1599ea1f5f37SPavel Tatashin * Virtual address of allocated memory block on success, NULL on failure. 1600ea1f5f37SPavel Tatashin */ 1601eb31d559SMike Rapoport void * __init memblock_alloc_try_nid_raw( 1602ea1f5f37SPavel Tatashin phys_addr_t size, phys_addr_t align, 1603ea1f5f37SPavel Tatashin phys_addr_t min_addr, phys_addr_t max_addr, 1604ea1f5f37SPavel Tatashin int nid) 1605ea1f5f37SPavel Tatashin { 1606d75f773cSSakari Ailus memblock_dbg("%s: %llu bytes align=0x%llx nid=%d from=%pa max_addr=%pa %pS\n", 1607a36aab89SMike Rapoport __func__, (u64)size, (u64)align, nid, &min_addr, 1608a36aab89SMike Rapoport &max_addr, (void *)_RET_IP_); 1609ea1f5f37SPavel Tatashin 161008678804SMike Rapoport return memblock_alloc_internal(size, align, min_addr, max_addr, nid, 161108678804SMike Rapoport false); 1612ea1f5f37SPavel Tatashin } 1613ea1f5f37SPavel Tatashin 1614ea1f5f37SPavel Tatashin /** 1615c0dbe825SMike Rapoport * memblock_alloc_try_nid - allocate boot memory block 161626f09e9bSSantosh Shilimkar * @size: size of memory block to be allocated in bytes 161726f09e9bSSantosh Shilimkar * @align: alignment of the region and block's size 161826f09e9bSSantosh Shilimkar * @min_addr: the lower bound of the memory region from where the allocation 161926f09e9bSSantosh Shilimkar * is preferred (phys address) 162026f09e9bSSantosh Shilimkar * @max_addr: the upper bound of the memory region from where the allocation 162197ad1087SMike Rapoport * is preferred (phys address), or %MEMBLOCK_ALLOC_ACCESSIBLE to 162226f09e9bSSantosh Shilimkar * allocate only from memory limited by memblock.current_limit value 162326f09e9bSSantosh Shilimkar * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 162426f09e9bSSantosh Shilimkar * 1625c0dbe825SMike Rapoport * Public function, provides additional debug information (including caller 1626c0dbe825SMike Rapoport * info), if enabled. This function zeroes the allocated memory. 162726f09e9bSSantosh Shilimkar * 162847cec443SMike Rapoport * Return: 162926f09e9bSSantosh Shilimkar * Virtual address of allocated memory block on success, NULL on failure. 163026f09e9bSSantosh Shilimkar */ 1631eb31d559SMike Rapoport void * __init memblock_alloc_try_nid( 163226f09e9bSSantosh Shilimkar phys_addr_t size, phys_addr_t align, 163326f09e9bSSantosh Shilimkar phys_addr_t min_addr, phys_addr_t max_addr, 163426f09e9bSSantosh Shilimkar int nid) 163526f09e9bSSantosh Shilimkar { 163626f09e9bSSantosh Shilimkar void *ptr; 163726f09e9bSSantosh Shilimkar 1638d75f773cSSakari Ailus memblock_dbg("%s: %llu bytes align=0x%llx nid=%d from=%pa max_addr=%pa %pS\n", 1639a36aab89SMike Rapoport __func__, (u64)size, (u64)align, nid, &min_addr, 1640a36aab89SMike Rapoport &max_addr, (void *)_RET_IP_); 1641eb31d559SMike Rapoport ptr = memblock_alloc_internal(size, align, 16420ac398b1SYunfeng Ye min_addr, max_addr, nid, false); 1643c0dbe825SMike Rapoport if (ptr) 1644ea1f5f37SPavel Tatashin memset(ptr, 0, size); 164526f09e9bSSantosh Shilimkar 1646c0dbe825SMike Rapoport return ptr; 164726f09e9bSSantosh Shilimkar } 164826f09e9bSSantosh Shilimkar 164926f09e9bSSantosh Shilimkar /** 1650621d9739SMike Rapoport * memblock_free_late - free pages directly to buddy allocator 165148a833ccSMike Rapoport * @base: phys starting address of the boot memory block 165226f09e9bSSantosh Shilimkar * @size: size of the boot memory block in bytes 165326f09e9bSSantosh Shilimkar * 1654a2974133SMike Rapoport * This is only useful when the memblock allocator has already been torn 165526f09e9bSSantosh Shilimkar * down, but we are still initializing the system. Pages are released directly 1656a2974133SMike Rapoport * to the buddy allocator. 165726f09e9bSSantosh Shilimkar */ 1658621d9739SMike Rapoport void __init memblock_free_late(phys_addr_t base, phys_addr_t size) 165926f09e9bSSantosh Shilimkar { 1660a36aab89SMike Rapoport phys_addr_t cursor, end; 166126f09e9bSSantosh Shilimkar 1662a36aab89SMike Rapoport end = base + size - 1; 1663d75f773cSSakari Ailus memblock_dbg("%s: [%pa-%pa] %pS\n", 1664a36aab89SMike Rapoport __func__, &base, &end, (void *)_RET_IP_); 16659099daedSCatalin Marinas kmemleak_free_part_phys(base, size); 166626f09e9bSSantosh Shilimkar cursor = PFN_UP(base); 166726f09e9bSSantosh Shilimkar end = PFN_DOWN(base + size); 166826f09e9bSSantosh Shilimkar 166926f09e9bSSantosh Shilimkar for (; cursor < end; cursor++) { 1670647037adSAaron Thompson memblock_free_pages(pfn_to_page(cursor), cursor, 0); 1671ca79b0c2SArun KS totalram_pages_inc(); 167226f09e9bSSantosh Shilimkar } 167326f09e9bSSantosh Shilimkar } 16749d1e2492SBenjamin Herrenschmidt 16759d1e2492SBenjamin Herrenschmidt /* 16769d1e2492SBenjamin Herrenschmidt * Remaining API functions 16779d1e2492SBenjamin Herrenschmidt */ 16789d1e2492SBenjamin Herrenschmidt 16791f1ffb8aSDavid Gibson phys_addr_t __init_memblock memblock_phys_mem_size(void) 168095f72d1eSYinghai Lu { 16811440c4e2STejun Heo return memblock.memory.total_size; 168295f72d1eSYinghai Lu } 168395f72d1eSYinghai Lu 16848907de5dSSrikar Dronamraju phys_addr_t __init_memblock memblock_reserved_size(void) 16858907de5dSSrikar Dronamraju { 16868907de5dSSrikar Dronamraju return memblock.reserved.total_size; 16878907de5dSSrikar Dronamraju } 16888907de5dSSrikar Dronamraju 16890a93ebefSSam Ravnborg /* lowest address */ 16900a93ebefSSam Ravnborg phys_addr_t __init_memblock memblock_start_of_DRAM(void) 16910a93ebefSSam Ravnborg { 16920a93ebefSSam Ravnborg return memblock.memory.regions[0].base; 16930a93ebefSSam Ravnborg } 16940a93ebefSSam Ravnborg 169510d06439SYinghai Lu phys_addr_t __init_memblock memblock_end_of_DRAM(void) 169695f72d1eSYinghai Lu { 169795f72d1eSYinghai Lu int idx = memblock.memory.cnt - 1; 169895f72d1eSYinghai Lu 1699e3239ff9SBenjamin Herrenschmidt return (memblock.memory.regions[idx].base + memblock.memory.regions[idx].size); 170095f72d1eSYinghai Lu } 170195f72d1eSYinghai Lu 1702a571d4ebSDennis Chen static phys_addr_t __init_memblock __find_max_addr(phys_addr_t limit) 170395f72d1eSYinghai Lu { 17041c4bc43dSStefan Agner phys_addr_t max_addr = PHYS_ADDR_MAX; 1705136199f0SEmil Medve struct memblock_region *r; 170695f72d1eSYinghai Lu 1707a571d4ebSDennis Chen /* 1708a571d4ebSDennis Chen * translate the memory @limit size into the max address within one of 1709a571d4ebSDennis Chen * the memory memblock regions, if the @limit exceeds the total size 17101c4bc43dSStefan Agner * of those regions, max_addr will keep original value PHYS_ADDR_MAX 1711a571d4ebSDennis Chen */ 1712cc6de168SMike Rapoport for_each_mem_region(r) { 1713c0ce8fefSTejun Heo if (limit <= r->size) { 1714c0ce8fefSTejun Heo max_addr = r->base + limit; 171595f72d1eSYinghai Lu break; 171695f72d1eSYinghai Lu } 1717c0ce8fefSTejun Heo limit -= r->size; 171895f72d1eSYinghai Lu } 1719c0ce8fefSTejun Heo 1720a571d4ebSDennis Chen return max_addr; 1721a571d4ebSDennis Chen } 1722a571d4ebSDennis Chen 1723a571d4ebSDennis Chen void __init memblock_enforce_memory_limit(phys_addr_t limit) 1724a571d4ebSDennis Chen { 172549aef717SColin Ian King phys_addr_t max_addr; 1726a571d4ebSDennis Chen 1727a571d4ebSDennis Chen if (!limit) 1728a571d4ebSDennis Chen return; 1729a571d4ebSDennis Chen 1730a571d4ebSDennis Chen max_addr = __find_max_addr(limit); 1731a571d4ebSDennis Chen 1732a571d4ebSDennis Chen /* @limit exceeds the total size of the memory, do nothing */ 17331c4bc43dSStefan Agner if (max_addr == PHYS_ADDR_MAX) 1734a571d4ebSDennis Chen return; 1735a571d4ebSDennis Chen 1736c0ce8fefSTejun Heo /* truncate both memory and reserved regions */ 1737f1af9d3aSPhilipp Hachtmann memblock_remove_range(&memblock.memory, max_addr, 17381c4bc43dSStefan Agner PHYS_ADDR_MAX); 1739f1af9d3aSPhilipp Hachtmann memblock_remove_range(&memblock.reserved, max_addr, 17401c4bc43dSStefan Agner PHYS_ADDR_MAX); 174195f72d1eSYinghai Lu } 174295f72d1eSYinghai Lu 1743c9ca9b4eSAKASHI Takahiro void __init memblock_cap_memory_range(phys_addr_t base, phys_addr_t size) 1744c9ca9b4eSAKASHI Takahiro { 1745c9ca9b4eSAKASHI Takahiro int start_rgn, end_rgn; 1746c9ca9b4eSAKASHI Takahiro int i, ret; 1747c9ca9b4eSAKASHI Takahiro 1748c9ca9b4eSAKASHI Takahiro if (!size) 1749c9ca9b4eSAKASHI Takahiro return; 1750c9ca9b4eSAKASHI Takahiro 17515173ed72SPeng Fan if (!memblock_memory->total_size) { 1752e888fa7bSGeert Uytterhoeven pr_warn("%s: No memory registered yet\n", __func__); 1753e888fa7bSGeert Uytterhoeven return; 1754e888fa7bSGeert Uytterhoeven } 1755e888fa7bSGeert Uytterhoeven 1756c9ca9b4eSAKASHI Takahiro ret = memblock_isolate_range(&memblock.memory, base, size, 1757c9ca9b4eSAKASHI Takahiro &start_rgn, &end_rgn); 1758c9ca9b4eSAKASHI Takahiro if (ret) 1759c9ca9b4eSAKASHI Takahiro return; 1760c9ca9b4eSAKASHI Takahiro 1761c9ca9b4eSAKASHI Takahiro /* remove all the MAP regions */ 1762c9ca9b4eSAKASHI Takahiro for (i = memblock.memory.cnt - 1; i >= end_rgn; i--) 1763c9ca9b4eSAKASHI Takahiro if (!memblock_is_nomap(&memblock.memory.regions[i])) 1764c9ca9b4eSAKASHI Takahiro memblock_remove_region(&memblock.memory, i); 1765c9ca9b4eSAKASHI Takahiro 1766c9ca9b4eSAKASHI Takahiro for (i = start_rgn - 1; i >= 0; i--) 1767c9ca9b4eSAKASHI Takahiro if (!memblock_is_nomap(&memblock.memory.regions[i])) 1768c9ca9b4eSAKASHI Takahiro memblock_remove_region(&memblock.memory, i); 1769c9ca9b4eSAKASHI Takahiro 1770c9ca9b4eSAKASHI Takahiro /* truncate the reserved regions */ 1771c9ca9b4eSAKASHI Takahiro memblock_remove_range(&memblock.reserved, 0, base); 1772c9ca9b4eSAKASHI Takahiro memblock_remove_range(&memblock.reserved, 17731c4bc43dSStefan Agner base + size, PHYS_ADDR_MAX); 1774c9ca9b4eSAKASHI Takahiro } 1775c9ca9b4eSAKASHI Takahiro 1776a571d4ebSDennis Chen void __init memblock_mem_limit_remove_map(phys_addr_t limit) 1777a571d4ebSDennis Chen { 1778a571d4ebSDennis Chen phys_addr_t max_addr; 1779a571d4ebSDennis Chen 1780a571d4ebSDennis Chen if (!limit) 1781a571d4ebSDennis Chen return; 1782a571d4ebSDennis Chen 1783a571d4ebSDennis Chen max_addr = __find_max_addr(limit); 1784a571d4ebSDennis Chen 1785a571d4ebSDennis Chen /* @limit exceeds the total size of the memory, do nothing */ 17861c4bc43dSStefan Agner if (max_addr == PHYS_ADDR_MAX) 1787a571d4ebSDennis Chen return; 1788a571d4ebSDennis Chen 1789c9ca9b4eSAKASHI Takahiro memblock_cap_memory_range(0, max_addr); 1790a571d4ebSDennis Chen } 1791a571d4ebSDennis Chen 1792cd79481dSYinghai Lu static int __init_memblock memblock_search(struct memblock_type *type, phys_addr_t addr) 179372d4b0b4SBenjamin Herrenschmidt { 179472d4b0b4SBenjamin Herrenschmidt unsigned int left = 0, right = type->cnt; 179572d4b0b4SBenjamin Herrenschmidt 179672d4b0b4SBenjamin Herrenschmidt do { 179772d4b0b4SBenjamin Herrenschmidt unsigned int mid = (right + left) / 2; 179872d4b0b4SBenjamin Herrenschmidt 179972d4b0b4SBenjamin Herrenschmidt if (addr < type->regions[mid].base) 180072d4b0b4SBenjamin Herrenschmidt right = mid; 180172d4b0b4SBenjamin Herrenschmidt else if (addr >= (type->regions[mid].base + 180272d4b0b4SBenjamin Herrenschmidt type->regions[mid].size)) 180372d4b0b4SBenjamin Herrenschmidt left = mid + 1; 180472d4b0b4SBenjamin Herrenschmidt else 180572d4b0b4SBenjamin Herrenschmidt return mid; 180672d4b0b4SBenjamin Herrenschmidt } while (left < right); 180772d4b0b4SBenjamin Herrenschmidt return -1; 180872d4b0b4SBenjamin Herrenschmidt } 180972d4b0b4SBenjamin Herrenschmidt 1810f5a222dcSYueyi Li bool __init_memblock memblock_is_reserved(phys_addr_t addr) 181195f72d1eSYinghai Lu { 181272d4b0b4SBenjamin Herrenschmidt return memblock_search(&memblock.reserved, addr) != -1; 181395f72d1eSYinghai Lu } 181472d4b0b4SBenjamin Herrenschmidt 1815b4ad0c7eSYaowei Bai bool __init_memblock memblock_is_memory(phys_addr_t addr) 181672d4b0b4SBenjamin Herrenschmidt { 181772d4b0b4SBenjamin Herrenschmidt return memblock_search(&memblock.memory, addr) != -1; 181872d4b0b4SBenjamin Herrenschmidt } 181972d4b0b4SBenjamin Herrenschmidt 1820937f0c26SYaowei Bai bool __init_memblock memblock_is_map_memory(phys_addr_t addr) 1821bf3d3cc5SArd Biesheuvel { 1822bf3d3cc5SArd Biesheuvel int i = memblock_search(&memblock.memory, addr); 1823bf3d3cc5SArd Biesheuvel 1824bf3d3cc5SArd Biesheuvel if (i == -1) 1825bf3d3cc5SArd Biesheuvel return false; 1826bf3d3cc5SArd Biesheuvel return !memblock_is_nomap(&memblock.memory.regions[i]); 1827bf3d3cc5SArd Biesheuvel } 1828bf3d3cc5SArd Biesheuvel 1829e76b63f8SYinghai Lu int __init_memblock memblock_search_pfn_nid(unsigned long pfn, 1830e76b63f8SYinghai Lu unsigned long *start_pfn, unsigned long *end_pfn) 1831e76b63f8SYinghai Lu { 1832e76b63f8SYinghai Lu struct memblock_type *type = &memblock.memory; 183316763230SFabian Frederick int mid = memblock_search(type, PFN_PHYS(pfn)); 1834e76b63f8SYinghai Lu 1835e76b63f8SYinghai Lu if (mid == -1) 1836e76b63f8SYinghai Lu return -1; 1837e76b63f8SYinghai Lu 1838f7e2f7e8SFabian Frederick *start_pfn = PFN_DOWN(type->regions[mid].base); 1839f7e2f7e8SFabian Frederick *end_pfn = PFN_DOWN(type->regions[mid].base + type->regions[mid].size); 1840e76b63f8SYinghai Lu 1841d622abf7SMike Rapoport return memblock_get_region_node(&type->regions[mid]); 1842e76b63f8SYinghai Lu } 1843e76b63f8SYinghai Lu 1844eab30949SStephen Boyd /** 1845eab30949SStephen Boyd * memblock_is_region_memory - check if a region is a subset of memory 1846eab30949SStephen Boyd * @base: base of region to check 1847eab30949SStephen Boyd * @size: size of region to check 1848eab30949SStephen Boyd * 1849eab30949SStephen Boyd * Check if the region [@base, @base + @size) is a subset of a memory block. 1850eab30949SStephen Boyd * 185147cec443SMike Rapoport * Return: 1852eab30949SStephen Boyd * 0 if false, non-zero if true 1853eab30949SStephen Boyd */ 1854937f0c26SYaowei Bai bool __init_memblock memblock_is_region_memory(phys_addr_t base, phys_addr_t size) 185572d4b0b4SBenjamin Herrenschmidt { 1856abb65272STomi Valkeinen int idx = memblock_search(&memblock.memory, base); 1857eb18f1b5STejun Heo phys_addr_t end = base + memblock_cap_size(base, &size); 185872d4b0b4SBenjamin Herrenschmidt 185972d4b0b4SBenjamin Herrenschmidt if (idx == -1) 1860937f0c26SYaowei Bai return false; 1861ef415ef4SWei Yang return (memblock.memory.regions[idx].base + 1862eb18f1b5STejun Heo memblock.memory.regions[idx].size) >= end; 186395f72d1eSYinghai Lu } 186495f72d1eSYinghai Lu 1865eab30949SStephen Boyd /** 1866eab30949SStephen Boyd * memblock_is_region_reserved - check if a region intersects reserved memory 1867eab30949SStephen Boyd * @base: base of region to check 1868eab30949SStephen Boyd * @size: size of region to check 1869eab30949SStephen Boyd * 187047cec443SMike Rapoport * Check if the region [@base, @base + @size) intersects a reserved 187147cec443SMike Rapoport * memory block. 1872eab30949SStephen Boyd * 187347cec443SMike Rapoport * Return: 1874c5c5c9d1STang Chen * True if they intersect, false if not. 1875eab30949SStephen Boyd */ 1876c5c5c9d1STang Chen bool __init_memblock memblock_is_region_reserved(phys_addr_t base, phys_addr_t size) 187795f72d1eSYinghai Lu { 1878c5c5c9d1STang Chen return memblock_overlaps_region(&memblock.reserved, base, size); 187995f72d1eSYinghai Lu } 188095f72d1eSYinghai Lu 18816ede1fd3SYinghai Lu void __init_memblock memblock_trim_memory(phys_addr_t align) 18826ede1fd3SYinghai Lu { 18836ede1fd3SYinghai Lu phys_addr_t start, end, orig_start, orig_end; 1884136199f0SEmil Medve struct memblock_region *r; 18856ede1fd3SYinghai Lu 1886cc6de168SMike Rapoport for_each_mem_region(r) { 1887136199f0SEmil Medve orig_start = r->base; 1888136199f0SEmil Medve orig_end = r->base + r->size; 18896ede1fd3SYinghai Lu start = round_up(orig_start, align); 18906ede1fd3SYinghai Lu end = round_down(orig_end, align); 18916ede1fd3SYinghai Lu 18926ede1fd3SYinghai Lu if (start == orig_start && end == orig_end) 18936ede1fd3SYinghai Lu continue; 18946ede1fd3SYinghai Lu 18956ede1fd3SYinghai Lu if (start < end) { 1896136199f0SEmil Medve r->base = start; 1897136199f0SEmil Medve r->size = end - start; 18986ede1fd3SYinghai Lu } else { 1899136199f0SEmil Medve memblock_remove_region(&memblock.memory, 1900136199f0SEmil Medve r - memblock.memory.regions); 1901136199f0SEmil Medve r--; 19026ede1fd3SYinghai Lu } 19036ede1fd3SYinghai Lu } 19046ede1fd3SYinghai Lu } 1905e63075a3SBenjamin Herrenschmidt 19063661ca66SYinghai Lu void __init_memblock memblock_set_current_limit(phys_addr_t limit) 1907e63075a3SBenjamin Herrenschmidt { 1908e63075a3SBenjamin Herrenschmidt memblock.current_limit = limit; 1909e63075a3SBenjamin Herrenschmidt } 1910e63075a3SBenjamin Herrenschmidt 1911fec51014SLaura Abbott phys_addr_t __init_memblock memblock_get_current_limit(void) 1912fec51014SLaura Abbott { 1913fec51014SLaura Abbott return memblock.current_limit; 1914fec51014SLaura Abbott } 1915fec51014SLaura Abbott 19160262d9c8SHeiko Carstens static void __init_memblock memblock_dump(struct memblock_type *type) 19176ed311b2SBenjamin Herrenschmidt { 19185d63f81cSMiles Chen phys_addr_t base, end, size; 1919e1720feeSMike Rapoport enum memblock_flags flags; 19208c9c1701SAlexander Kuleshov int idx; 19218c9c1701SAlexander Kuleshov struct memblock_region *rgn; 19226ed311b2SBenjamin Herrenschmidt 19230262d9c8SHeiko Carstens pr_info(" %s.cnt = 0x%lx\n", type->name, type->cnt); 19246ed311b2SBenjamin Herrenschmidt 192566e8b438SGioh Kim for_each_memblock_type(idx, type, rgn) { 19267c0caeb8STejun Heo char nid_buf[32] = ""; 19276ed311b2SBenjamin Herrenschmidt 19287c0caeb8STejun Heo base = rgn->base; 19297c0caeb8STejun Heo size = rgn->size; 19305d63f81cSMiles Chen end = base + size - 1; 193166a20757STang Chen flags = rgn->flags; 1932a9ee6cf5SMike Rapoport #ifdef CONFIG_NUMA 19337c0caeb8STejun Heo if (memblock_get_region_node(rgn) != MAX_NUMNODES) 19347c0caeb8STejun Heo snprintf(nid_buf, sizeof(nid_buf), " on node %d", 19357c0caeb8STejun Heo memblock_get_region_node(rgn)); 19367c0caeb8STejun Heo #endif 1937e1720feeSMike Rapoport pr_info(" %s[%#x]\t[%pa-%pa], %pa bytes%s flags: %#x\n", 19380262d9c8SHeiko Carstens type->name, idx, &base, &end, &size, nid_buf, flags); 19396ed311b2SBenjamin Herrenschmidt } 19406ed311b2SBenjamin Herrenschmidt } 19416ed311b2SBenjamin Herrenschmidt 194287c55870SMike Rapoport static void __init_memblock __memblock_dump_all(void) 19436ed311b2SBenjamin Herrenschmidt { 19446ed311b2SBenjamin Herrenschmidt pr_info("MEMBLOCK configuration:\n"); 19455d63f81cSMiles Chen pr_info(" memory size = %pa reserved size = %pa\n", 19465d63f81cSMiles Chen &memblock.memory.total_size, 19475d63f81cSMiles Chen &memblock.reserved.total_size); 19486ed311b2SBenjamin Herrenschmidt 19490262d9c8SHeiko Carstens memblock_dump(&memblock.memory); 19500262d9c8SHeiko Carstens memblock_dump(&memblock.reserved); 1951409efd4cSHeiko Carstens #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP 195277649905SDavid Hildenbrand memblock_dump(&physmem); 1953409efd4cSHeiko Carstens #endif 19546ed311b2SBenjamin Herrenschmidt } 19556ed311b2SBenjamin Herrenschmidt 195687c55870SMike Rapoport void __init_memblock memblock_dump_all(void) 195787c55870SMike Rapoport { 195887c55870SMike Rapoport if (memblock_debug) 195987c55870SMike Rapoport __memblock_dump_all(); 196087c55870SMike Rapoport } 196187c55870SMike Rapoport 19621aadc056STejun Heo void __init memblock_allow_resize(void) 19636ed311b2SBenjamin Herrenschmidt { 1964142b45a7SBenjamin Herrenschmidt memblock_can_resize = 1; 19656ed311b2SBenjamin Herrenschmidt } 19666ed311b2SBenjamin Herrenschmidt 19676ed311b2SBenjamin Herrenschmidt static int __init early_memblock(char *p) 19686ed311b2SBenjamin Herrenschmidt { 19696ed311b2SBenjamin Herrenschmidt if (p && strstr(p, "debug")) 19706ed311b2SBenjamin Herrenschmidt memblock_debug = 1; 19716ed311b2SBenjamin Herrenschmidt return 0; 19726ed311b2SBenjamin Herrenschmidt } 19736ed311b2SBenjamin Herrenschmidt early_param("memblock", early_memblock); 19746ed311b2SBenjamin Herrenschmidt 19754f5b0c17SMike Rapoport static void __init free_memmap(unsigned long start_pfn, unsigned long end_pfn) 19764f5b0c17SMike Rapoport { 19774f5b0c17SMike Rapoport struct page *start_pg, *end_pg; 19784f5b0c17SMike Rapoport phys_addr_t pg, pgend; 19794f5b0c17SMike Rapoport 19804f5b0c17SMike Rapoport /* 19814f5b0c17SMike Rapoport * Convert start_pfn/end_pfn to a struct page pointer. 19824f5b0c17SMike Rapoport */ 19834f5b0c17SMike Rapoport start_pg = pfn_to_page(start_pfn - 1) + 1; 19844f5b0c17SMike Rapoport end_pg = pfn_to_page(end_pfn - 1) + 1; 19854f5b0c17SMike Rapoport 19864f5b0c17SMike Rapoport /* 19874f5b0c17SMike Rapoport * Convert to physical addresses, and round start upwards and end 19884f5b0c17SMike Rapoport * downwards. 19894f5b0c17SMike Rapoport */ 19904f5b0c17SMike Rapoport pg = PAGE_ALIGN(__pa(start_pg)); 19914f5b0c17SMike Rapoport pgend = __pa(end_pg) & PAGE_MASK; 19924f5b0c17SMike Rapoport 19934f5b0c17SMike Rapoport /* 19944f5b0c17SMike Rapoport * If there are free pages between these, free the section of the 19954f5b0c17SMike Rapoport * memmap array. 19964f5b0c17SMike Rapoport */ 19974f5b0c17SMike Rapoport if (pg < pgend) 19983ecc6834SMike Rapoport memblock_phys_free(pg, pgend - pg); 19994f5b0c17SMike Rapoport } 20004f5b0c17SMike Rapoport 20014f5b0c17SMike Rapoport /* 20024f5b0c17SMike Rapoport * The mem_map array can get very big. Free the unused area of the memory map. 20034f5b0c17SMike Rapoport */ 20044f5b0c17SMike Rapoport static void __init free_unused_memmap(void) 20054f5b0c17SMike Rapoport { 20064f5b0c17SMike Rapoport unsigned long start, end, prev_end = 0; 20074f5b0c17SMike Rapoport int i; 20084f5b0c17SMike Rapoport 20094f5b0c17SMike Rapoport if (!IS_ENABLED(CONFIG_HAVE_ARCH_PFN_VALID) || 20104f5b0c17SMike Rapoport IS_ENABLED(CONFIG_SPARSEMEM_VMEMMAP)) 20114f5b0c17SMike Rapoport return; 20124f5b0c17SMike Rapoport 20134f5b0c17SMike Rapoport /* 20144f5b0c17SMike Rapoport * This relies on each bank being in address order. 20154f5b0c17SMike Rapoport * The banks are sorted previously in bootmem_init(). 20164f5b0c17SMike Rapoport */ 20174f5b0c17SMike Rapoport for_each_mem_pfn_range(i, MAX_NUMNODES, &start, &end, NULL) { 20184f5b0c17SMike Rapoport #ifdef CONFIG_SPARSEMEM 20194f5b0c17SMike Rapoport /* 20204f5b0c17SMike Rapoport * Take care not to free memmap entries that don't exist 20214f5b0c17SMike Rapoport * due to SPARSEMEM sections which aren't present. 20224f5b0c17SMike Rapoport */ 20234f5b0c17SMike Rapoport start = min(start, ALIGN(prev_end, PAGES_PER_SECTION)); 20244f5b0c17SMike Rapoport #endif 20254f5b0c17SMike Rapoport /* 2026e2a86800SMike Rapoport * Align down here since many operations in VM subsystem 2027e2a86800SMike Rapoport * presume that there are no holes in the memory map inside 2028e2a86800SMike Rapoport * a pageblock 20294f5b0c17SMike Rapoport */ 20304f9bc69aSKefeng Wang start = pageblock_start_pfn(start); 20314f5b0c17SMike Rapoport 20324f5b0c17SMike Rapoport /* 20334f5b0c17SMike Rapoport * If we had a previous bank, and there is a space 20344f5b0c17SMike Rapoport * between the current bank and the previous, free it. 20354f5b0c17SMike Rapoport */ 20364f5b0c17SMike Rapoport if (prev_end && prev_end < start) 20374f5b0c17SMike Rapoport free_memmap(prev_end, start); 20384f5b0c17SMike Rapoport 20394f5b0c17SMike Rapoport /* 2040e2a86800SMike Rapoport * Align up here since many operations in VM subsystem 2041e2a86800SMike Rapoport * presume that there are no holes in the memory map inside 2042e2a86800SMike Rapoport * a pageblock 20434f5b0c17SMike Rapoport */ 20445f7fa13fSKefeng Wang prev_end = pageblock_align(end); 20454f5b0c17SMike Rapoport } 20464f5b0c17SMike Rapoport 20474f5b0c17SMike Rapoport #ifdef CONFIG_SPARSEMEM 2048f921f53eSMike Rapoport if (!IS_ALIGNED(prev_end, PAGES_PER_SECTION)) { 20495f7fa13fSKefeng Wang prev_end = pageblock_align(end); 20504f5b0c17SMike Rapoport free_memmap(prev_end, ALIGN(prev_end, PAGES_PER_SECTION)); 2051f921f53eSMike Rapoport } 20524f5b0c17SMike Rapoport #endif 20534f5b0c17SMike Rapoport } 20544f5b0c17SMike Rapoport 2055bda49a81SMike Rapoport static void __init __free_pages_memory(unsigned long start, unsigned long end) 2056bda49a81SMike Rapoport { 2057bda49a81SMike Rapoport int order; 2058bda49a81SMike Rapoport 2059bda49a81SMike Rapoport while (start < end) { 206059f876fbSKirill A. Shutemov /* 206159f876fbSKirill A. Shutemov * Free the pages in the largest chunks alignment allows. 206259f876fbSKirill A. Shutemov * 206359f876fbSKirill A. Shutemov * __ffs() behaviour is undefined for 0. start == 0 is 206459f876fbSKirill A. Shutemov * MAX_ORDER-aligned, set order to MAX_ORDER for the case. 206559f876fbSKirill A. Shutemov */ 206659f876fbSKirill A. Shutemov if (start) 206723baf831SKirill A. Shutemov order = min_t(int, MAX_ORDER, __ffs(start)); 206859f876fbSKirill A. Shutemov else 206959f876fbSKirill A. Shutemov order = MAX_ORDER; 2070bda49a81SMike Rapoport 2071bda49a81SMike Rapoport while (start + (1UL << order) > end) 2072bda49a81SMike Rapoport order--; 2073bda49a81SMike Rapoport 2074bda49a81SMike Rapoport memblock_free_pages(pfn_to_page(start), start, order); 2075bda49a81SMike Rapoport 2076bda49a81SMike Rapoport start += (1UL << order); 2077bda49a81SMike Rapoport } 2078bda49a81SMike Rapoport } 2079bda49a81SMike Rapoport 2080bda49a81SMike Rapoport static unsigned long __init __free_memory_core(phys_addr_t start, 2081bda49a81SMike Rapoport phys_addr_t end) 2082bda49a81SMike Rapoport { 2083bda49a81SMike Rapoport unsigned long start_pfn = PFN_UP(start); 2084bda49a81SMike Rapoport unsigned long end_pfn = min_t(unsigned long, 2085bda49a81SMike Rapoport PFN_DOWN(end), max_low_pfn); 2086bda49a81SMike Rapoport 2087bda49a81SMike Rapoport if (start_pfn >= end_pfn) 2088bda49a81SMike Rapoport return 0; 2089bda49a81SMike Rapoport 2090bda49a81SMike Rapoport __free_pages_memory(start_pfn, end_pfn); 2091bda49a81SMike Rapoport 2092bda49a81SMike Rapoport return end_pfn - start_pfn; 2093bda49a81SMike Rapoport } 2094bda49a81SMike Rapoport 20959092d4f7SMike Rapoport static void __init memmap_init_reserved_pages(void) 20969092d4f7SMike Rapoport { 20979092d4f7SMike Rapoport struct memblock_region *region; 20989092d4f7SMike Rapoport phys_addr_t start, end; 209961167ad5SYajun Deng int nid; 21009092d4f7SMike Rapoport 210161167ad5SYajun Deng /* 210261167ad5SYajun Deng * set nid on all reserved pages and also treat struct 210361167ad5SYajun Deng * pages for the NOMAP regions as PageReserved 210461167ad5SYajun Deng */ 21059092d4f7SMike Rapoport for_each_mem_region(region) { 210661167ad5SYajun Deng nid = memblock_get_region_node(region); 21079092d4f7SMike Rapoport start = region->base; 21089092d4f7SMike Rapoport end = start + region->size; 210961167ad5SYajun Deng 211061167ad5SYajun Deng if (memblock_is_nomap(region)) 211161167ad5SYajun Deng reserve_bootmem_region(start, end, nid); 211261167ad5SYajun Deng 211361167ad5SYajun Deng memblock_set_node(start, end, &memblock.reserved, nid); 21149092d4f7SMike Rapoport } 211561167ad5SYajun Deng 211661167ad5SYajun Deng /* initialize struct pages for the reserved regions */ 211761167ad5SYajun Deng for_each_reserved_mem_region(region) { 211861167ad5SYajun Deng nid = memblock_get_region_node(region); 211961167ad5SYajun Deng start = region->base; 212061167ad5SYajun Deng end = start + region->size; 212161167ad5SYajun Deng 212261167ad5SYajun Deng reserve_bootmem_region(start, end, nid); 21239092d4f7SMike Rapoport } 21249092d4f7SMike Rapoport } 21259092d4f7SMike Rapoport 2126bda49a81SMike Rapoport static unsigned long __init free_low_memory_core_early(void) 2127bda49a81SMike Rapoport { 2128bda49a81SMike Rapoport unsigned long count = 0; 2129bda49a81SMike Rapoport phys_addr_t start, end; 2130bda49a81SMike Rapoport u64 i; 2131bda49a81SMike Rapoport 2132bda49a81SMike Rapoport memblock_clear_hotplug(0, -1); 2133bda49a81SMike Rapoport 21349092d4f7SMike Rapoport memmap_init_reserved_pages(); 2135bda49a81SMike Rapoport 2136bda49a81SMike Rapoport /* 2137bda49a81SMike Rapoport * We need to use NUMA_NO_NODE instead of NODE_DATA(0)->node_id 2138bda49a81SMike Rapoport * because in some case like Node0 doesn't have RAM installed 2139bda49a81SMike Rapoport * low ram will be on Node1 2140bda49a81SMike Rapoport */ 2141bda49a81SMike Rapoport for_each_free_mem_range(i, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, 2142bda49a81SMike Rapoport NULL) 2143bda49a81SMike Rapoport count += __free_memory_core(start, end); 2144bda49a81SMike Rapoport 2145bda49a81SMike Rapoport return count; 2146bda49a81SMike Rapoport } 2147bda49a81SMike Rapoport 2148bda49a81SMike Rapoport static int reset_managed_pages_done __initdata; 2149bda49a81SMike Rapoport 2150a668968fSHaifeng Xu static void __init reset_node_managed_pages(pg_data_t *pgdat) 2151bda49a81SMike Rapoport { 2152bda49a81SMike Rapoport struct zone *z; 2153bda49a81SMike Rapoport 2154bda49a81SMike Rapoport for (z = pgdat->node_zones; z < pgdat->node_zones + MAX_NR_ZONES; z++) 21559705bea5SArun KS atomic_long_set(&z->managed_pages, 0); 2156bda49a81SMike Rapoport } 2157bda49a81SMike Rapoport 2158bda49a81SMike Rapoport void __init reset_all_zones_managed_pages(void) 2159bda49a81SMike Rapoport { 2160bda49a81SMike Rapoport struct pglist_data *pgdat; 2161bda49a81SMike Rapoport 2162bda49a81SMike Rapoport if (reset_managed_pages_done) 2163bda49a81SMike Rapoport return; 2164bda49a81SMike Rapoport 2165bda49a81SMike Rapoport for_each_online_pgdat(pgdat) 2166bda49a81SMike Rapoport reset_node_managed_pages(pgdat); 2167bda49a81SMike Rapoport 2168bda49a81SMike Rapoport reset_managed_pages_done = 1; 2169bda49a81SMike Rapoport } 2170bda49a81SMike Rapoport 2171bda49a81SMike Rapoport /** 2172bda49a81SMike Rapoport * memblock_free_all - release free pages to the buddy allocator 2173bda49a81SMike Rapoport */ 2174097d43d8SDaeseok Youn void __init memblock_free_all(void) 2175bda49a81SMike Rapoport { 2176bda49a81SMike Rapoport unsigned long pages; 2177bda49a81SMike Rapoport 21784f5b0c17SMike Rapoport free_unused_memmap(); 2179bda49a81SMike Rapoport reset_all_zones_managed_pages(); 2180bda49a81SMike Rapoport 2181bda49a81SMike Rapoport pages = free_low_memory_core_early(); 2182ca79b0c2SArun KS totalram_pages_add(pages); 2183bda49a81SMike Rapoport } 2184bda49a81SMike Rapoport 2185350e88baSMike Rapoport #if defined(CONFIG_DEBUG_FS) && defined(CONFIG_ARCH_KEEP_MEMBLOCK) 2186493f349eSYuwei Guan static const char * const flagname[] = { 2187493f349eSYuwei Guan [ilog2(MEMBLOCK_HOTPLUG)] = "HOTPLUG", 2188493f349eSYuwei Guan [ilog2(MEMBLOCK_MIRROR)] = "MIRROR", 2189493f349eSYuwei Guan [ilog2(MEMBLOCK_NOMAP)] = "NOMAP", 2190493f349eSYuwei Guan [ilog2(MEMBLOCK_DRIVER_MANAGED)] = "DRV_MNG", 2191493f349eSYuwei Guan }; 21926d03b885SBenjamin Herrenschmidt 21936d03b885SBenjamin Herrenschmidt static int memblock_debug_show(struct seq_file *m, void *private) 21946d03b885SBenjamin Herrenschmidt { 21956d03b885SBenjamin Herrenschmidt struct memblock_type *type = m->private; 21966d03b885SBenjamin Herrenschmidt struct memblock_region *reg; 2197de649e7fSYuwei Guan int i, j, nid; 2198493f349eSYuwei Guan unsigned int count = ARRAY_SIZE(flagname); 21995d63f81cSMiles Chen phys_addr_t end; 22006d03b885SBenjamin Herrenschmidt 22016d03b885SBenjamin Herrenschmidt for (i = 0; i < type->cnt; i++) { 22026d03b885SBenjamin Herrenschmidt reg = &type->regions[i]; 22035d63f81cSMiles Chen end = reg->base + reg->size - 1; 2204de649e7fSYuwei Guan nid = memblock_get_region_node(reg); 22056d03b885SBenjamin Herrenschmidt 22065d63f81cSMiles Chen seq_printf(m, "%4d: ", i); 2207493f349eSYuwei Guan seq_printf(m, "%pa..%pa ", ®->base, &end); 2208de649e7fSYuwei Guan if (nid != MAX_NUMNODES) 2209de649e7fSYuwei Guan seq_printf(m, "%4d ", nid); 2210de649e7fSYuwei Guan else 2211de649e7fSYuwei Guan seq_printf(m, "%4c ", 'x'); 2212493f349eSYuwei Guan if (reg->flags) { 2213493f349eSYuwei Guan for (j = 0; j < count; j++) { 2214493f349eSYuwei Guan if (reg->flags & (1U << j)) { 2215493f349eSYuwei Guan seq_printf(m, "%s\n", flagname[j]); 2216493f349eSYuwei Guan break; 2217493f349eSYuwei Guan } 2218493f349eSYuwei Guan } 2219493f349eSYuwei Guan if (j == count) 2220493f349eSYuwei Guan seq_printf(m, "%s\n", "UNKNOWN"); 2221493f349eSYuwei Guan } else { 2222493f349eSYuwei Guan seq_printf(m, "%s\n", "NONE"); 2223493f349eSYuwei Guan } 22246d03b885SBenjamin Herrenschmidt } 22256d03b885SBenjamin Herrenschmidt return 0; 22266d03b885SBenjamin Herrenschmidt } 22275ad35093SAndy Shevchenko DEFINE_SHOW_ATTRIBUTE(memblock_debug); 22286d03b885SBenjamin Herrenschmidt 22296d03b885SBenjamin Herrenschmidt static int __init memblock_init_debugfs(void) 22306d03b885SBenjamin Herrenschmidt { 22316d03b885SBenjamin Herrenschmidt struct dentry *root = debugfs_create_dir("memblock", NULL); 2232d9f7979cSGreg Kroah-Hartman 22330825a6f9SJoe Perches debugfs_create_file("memory", 0444, root, 22340825a6f9SJoe Perches &memblock.memory, &memblock_debug_fops); 22350825a6f9SJoe Perches debugfs_create_file("reserved", 0444, root, 22360825a6f9SJoe Perches &memblock.reserved, &memblock_debug_fops); 223770210ed9SPhilipp Hachtmann #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP 223877649905SDavid Hildenbrand debugfs_create_file("physmem", 0444, root, &physmem, 223977649905SDavid Hildenbrand &memblock_debug_fops); 224070210ed9SPhilipp Hachtmann #endif 22416d03b885SBenjamin Herrenschmidt 22426d03b885SBenjamin Herrenschmidt return 0; 22436d03b885SBenjamin Herrenschmidt } 22446d03b885SBenjamin Herrenschmidt __initcall(memblock_init_debugfs); 22456d03b885SBenjamin Herrenschmidt 22466d03b885SBenjamin Herrenschmidt #endif /* CONFIG_DEBUG_FS */ 2247