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 323e039c5cSMike Rapoport /** 333e039c5cSMike Rapoport * DOC: memblock overview 343e039c5cSMike Rapoport * 353e039c5cSMike Rapoport * Memblock is a method of managing memory regions during the early 363e039c5cSMike Rapoport * boot period when the usual kernel memory allocators are not up and 373e039c5cSMike Rapoport * running. 383e039c5cSMike Rapoport * 393e039c5cSMike Rapoport * Memblock views the system memory as collections of contiguous 403e039c5cSMike Rapoport * regions. There are several types of these collections: 413e039c5cSMike Rapoport * 423e039c5cSMike Rapoport * * ``memory`` - describes the physical memory available to the 433e039c5cSMike Rapoport * kernel; this may differ from the actual physical memory installed 443e039c5cSMike Rapoport * in the system, for instance when the memory is restricted with 453e039c5cSMike Rapoport * ``mem=`` command line parameter 463e039c5cSMike Rapoport * * ``reserved`` - describes the regions that were allocated 4777649905SDavid Hildenbrand * * ``physmem`` - describes the actual physical memory available during 4877649905SDavid Hildenbrand * boot regardless of the possible restrictions and memory hot(un)plug; 4977649905SDavid Hildenbrand * the ``physmem`` type is only available on some architectures. 503e039c5cSMike Rapoport * 519303c9d5SMauro Carvalho Chehab * Each region is represented by struct memblock_region that 523e039c5cSMike Rapoport * defines the region extents, its attributes and NUMA node id on NUMA 531bf162e4SMauro Carvalho Chehab * systems. Every memory type is described by the struct memblock_type 541bf162e4SMauro Carvalho Chehab * which contains an array of memory regions along with 5577649905SDavid Hildenbrand * the allocator metadata. The "memory" and "reserved" types are nicely 569303c9d5SMauro Carvalho Chehab * wrapped with struct memblock. This structure is statically 5777649905SDavid Hildenbrand * initialized at build time. The region arrays are initially sized to 5877649905SDavid Hildenbrand * %INIT_MEMBLOCK_REGIONS for "memory" and %INIT_MEMBLOCK_RESERVED_REGIONS 5977649905SDavid Hildenbrand * for "reserved". The region array for "physmem" is initially sized to 6077649905SDavid Hildenbrand * %INIT_PHYSMEM_REGIONS. 616e5af9a8SCao jin * The memblock_allow_resize() enables automatic resizing of the region 626e5af9a8SCao jin * arrays during addition of new regions. This feature should be used 636e5af9a8SCao jin * with care so that memory allocated for the region array will not 646e5af9a8SCao jin * overlap with areas that should be reserved, for example initrd. 653e039c5cSMike Rapoport * 663e039c5cSMike Rapoport * The early architecture setup should tell memblock what the physical 676e5af9a8SCao jin * memory layout is by using memblock_add() or memblock_add_node() 686e5af9a8SCao jin * functions. The first function does not assign the region to a NUMA 696e5af9a8SCao jin * node and it is appropriate for UMA systems. Yet, it is possible to 706e5af9a8SCao jin * use it on NUMA systems as well and assign the region to a NUMA node 716e5af9a8SCao jin * later in the setup process using memblock_set_node(). The 726e5af9a8SCao jin * memblock_add_node() performs such an assignment directly. 733e039c5cSMike Rapoport * 74a2974133SMike Rapoport * Once memblock is setup the memory can be allocated using one of the 75a2974133SMike Rapoport * API variants: 76a2974133SMike Rapoport * 776e5af9a8SCao jin * * memblock_phys_alloc*() - these functions return the **physical** 786e5af9a8SCao jin * address of the allocated memory 796e5af9a8SCao jin * * memblock_alloc*() - these functions return the **virtual** address 806e5af9a8SCao jin * of the allocated memory. 81a2974133SMike Rapoport * 82df1758d9SEthon Paul * Note, that both API variants use implicit assumptions about allowed 83a2974133SMike Rapoport * memory ranges and the fallback methods. Consult the documentation 846e5af9a8SCao jin * of memblock_alloc_internal() and memblock_alloc_range_nid() 856e5af9a8SCao jin * functions for more elaborate description. 863e039c5cSMike Rapoport * 876e5af9a8SCao jin * As the system boot progresses, the architecture specific mem_init() 886e5af9a8SCao jin * function frees all the memory to the buddy page allocator. 893e039c5cSMike Rapoport * 906e5af9a8SCao jin * Unless an architecture enables %CONFIG_ARCH_KEEP_MEMBLOCK, the 9177649905SDavid Hildenbrand * memblock data structures (except "physmem") will be discarded after the 9277649905SDavid Hildenbrand * system initialization completes. 933e039c5cSMike Rapoport */ 943e039c5cSMike Rapoport 95a9ee6cf5SMike Rapoport #ifndef CONFIG_NUMA 96bda49a81SMike Rapoport struct pglist_data __refdata contig_page_data; 97bda49a81SMike Rapoport EXPORT_SYMBOL(contig_page_data); 98bda49a81SMike Rapoport #endif 99bda49a81SMike Rapoport 100bda49a81SMike Rapoport unsigned long max_low_pfn; 101bda49a81SMike Rapoport unsigned long min_low_pfn; 102bda49a81SMike Rapoport unsigned long max_pfn; 103bda49a81SMike Rapoport unsigned long long max_possible_pfn; 104bda49a81SMike Rapoport 105fe091c20STejun Heo static struct memblock_region memblock_memory_init_regions[INIT_MEMBLOCK_REGIONS] __initdata_memblock; 1068a5b403dSArd Biesheuvel static struct memblock_region memblock_reserved_init_regions[INIT_MEMBLOCK_RESERVED_REGIONS] __initdata_memblock; 10770210ed9SPhilipp Hachtmann #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP 10877649905SDavid Hildenbrand static struct memblock_region memblock_physmem_init_regions[INIT_PHYSMEM_REGIONS]; 10970210ed9SPhilipp Hachtmann #endif 110fe091c20STejun Heo 111fe091c20STejun Heo struct memblock memblock __initdata_memblock = { 112fe091c20STejun Heo .memory.regions = memblock_memory_init_regions, 113fe091c20STejun Heo .memory.cnt = 1, /* empty dummy entry */ 114fe091c20STejun Heo .memory.max = INIT_MEMBLOCK_REGIONS, 1150262d9c8SHeiko Carstens .memory.name = "memory", 116fe091c20STejun Heo 117fe091c20STejun Heo .reserved.regions = memblock_reserved_init_regions, 118fe091c20STejun Heo .reserved.cnt = 1, /* empty dummy entry */ 1198a5b403dSArd Biesheuvel .reserved.max = INIT_MEMBLOCK_RESERVED_REGIONS, 1200262d9c8SHeiko Carstens .reserved.name = "reserved", 121fe091c20STejun Heo 12279442ed1STang Chen .bottom_up = false, 123fe091c20STejun Heo .current_limit = MEMBLOCK_ALLOC_ANYWHERE, 124fe091c20STejun Heo }; 12595f72d1eSYinghai Lu 12677649905SDavid Hildenbrand #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP 12777649905SDavid Hildenbrand struct memblock_type physmem = { 12877649905SDavid Hildenbrand .regions = memblock_physmem_init_regions, 12977649905SDavid Hildenbrand .cnt = 1, /* empty dummy entry */ 13077649905SDavid Hildenbrand .max = INIT_PHYSMEM_REGIONS, 13177649905SDavid Hildenbrand .name = "physmem", 13277649905SDavid Hildenbrand }; 13377649905SDavid Hildenbrand #endif 13477649905SDavid Hildenbrand 1359f3d5eaaSMike Rapoport /* 1369f3d5eaaSMike Rapoport * keep a pointer to &memblock.memory in the text section to use it in 1379f3d5eaaSMike Rapoport * __next_mem_range() and its helpers. 1389f3d5eaaSMike Rapoport * For architectures that do not keep memblock data after init, this 1399f3d5eaaSMike Rapoport * pointer will be reset to NULL at memblock_discard() 1409f3d5eaaSMike Rapoport */ 1419f3d5eaaSMike Rapoport static __refdata struct memblock_type *memblock_memory = &memblock.memory; 1429f3d5eaaSMike Rapoport 143cd991db8SMike Rapoport #define for_each_memblock_type(i, memblock_type, rgn) \ 144cd991db8SMike Rapoport for (i = 0, rgn = &memblock_type->regions[0]; \ 145cd991db8SMike Rapoport i < memblock_type->cnt; \ 146cd991db8SMike Rapoport i++, rgn = &memblock_type->regions[i]) 147cd991db8SMike Rapoport 14887c55870SMike Rapoport #define memblock_dbg(fmt, ...) \ 14987c55870SMike Rapoport do { \ 15087c55870SMike Rapoport if (memblock_debug) \ 15187c55870SMike Rapoport pr_info(fmt, ##__VA_ARGS__); \ 15287c55870SMike Rapoport } while (0) 15387c55870SMike Rapoport 15487c55870SMike Rapoport static int memblock_debug __initdata_memblock; 155a3f5bafcSTony Luck static bool system_has_some_mirror __initdata_memblock = false; 1561aadc056STejun Heo static int memblock_can_resize __initdata_memblock; 157181eb394SGavin Shan static int memblock_memory_in_slab __initdata_memblock = 0; 158181eb394SGavin Shan static int memblock_reserved_in_slab __initdata_memblock = 0; 15995f72d1eSYinghai Lu 160c366ea89SMike Rapoport static enum memblock_flags __init_memblock choose_memblock_flags(void) 161a3f5bafcSTony Luck { 162a3f5bafcSTony Luck return system_has_some_mirror ? MEMBLOCK_MIRROR : MEMBLOCK_NONE; 163a3f5bafcSTony Luck } 164a3f5bafcSTony Luck 165eb18f1b5STejun Heo /* adjust *@size so that (@base + *@size) doesn't overflow, return new size */ 166eb18f1b5STejun Heo static inline phys_addr_t memblock_cap_size(phys_addr_t base, phys_addr_t *size) 167eb18f1b5STejun Heo { 1681c4bc43dSStefan Agner return *size = min(*size, PHYS_ADDR_MAX - base); 169eb18f1b5STejun Heo } 170eb18f1b5STejun Heo 1716ed311b2SBenjamin Herrenschmidt /* 1726ed311b2SBenjamin Herrenschmidt * Address comparison utilities 1736ed311b2SBenjamin Herrenschmidt */ 17410d06439SYinghai Lu static unsigned long __init_memblock memblock_addrs_overlap(phys_addr_t base1, phys_addr_t size1, 1752898cc4cSBenjamin Herrenschmidt phys_addr_t base2, phys_addr_t size2) 17695f72d1eSYinghai Lu { 17795f72d1eSYinghai Lu return ((base1 < (base2 + size2)) && (base2 < (base1 + size1))); 17895f72d1eSYinghai Lu } 17995f72d1eSYinghai Lu 18095cf82ecSTang Chen bool __init_memblock memblock_overlaps_region(struct memblock_type *type, 1812d7d3eb2SH Hartley Sweeten phys_addr_t base, phys_addr_t size) 1826ed311b2SBenjamin Herrenschmidt { 1836ed311b2SBenjamin Herrenschmidt unsigned long i; 1846ed311b2SBenjamin Herrenschmidt 185023accf5SMike Rapoport memblock_cap_size(base, &size); 186023accf5SMike Rapoport 187f14516fbSAlexander Kuleshov for (i = 0; i < type->cnt; i++) 188f14516fbSAlexander Kuleshov if (memblock_addrs_overlap(base, size, type->regions[i].base, 189f14516fbSAlexander Kuleshov type->regions[i].size)) 1906ed311b2SBenjamin Herrenschmidt break; 191c5c5c9d1STang Chen return i < type->cnt; 1926ed311b2SBenjamin Herrenschmidt } 1936ed311b2SBenjamin Herrenschmidt 19447cec443SMike Rapoport /** 19579442ed1STang Chen * __memblock_find_range_bottom_up - find free area utility in bottom-up 19679442ed1STang Chen * @start: start of candidate range 19747cec443SMike Rapoport * @end: end of candidate range, can be %MEMBLOCK_ALLOC_ANYWHERE or 19847cec443SMike Rapoport * %MEMBLOCK_ALLOC_ACCESSIBLE 19979442ed1STang Chen * @size: size of free area to find 20079442ed1STang Chen * @align: alignment of free area to find 201b1154233SGrygorii Strashko * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 202fc6daaf9STony Luck * @flags: pick from blocks based on memory attributes 20379442ed1STang Chen * 20479442ed1STang Chen * Utility called from memblock_find_in_range_node(), find free area bottom-up. 20579442ed1STang Chen * 20647cec443SMike Rapoport * Return: 20779442ed1STang Chen * Found address on success, 0 on failure. 20879442ed1STang Chen */ 20979442ed1STang Chen static phys_addr_t __init_memblock 21079442ed1STang Chen __memblock_find_range_bottom_up(phys_addr_t start, phys_addr_t end, 211fc6daaf9STony Luck phys_addr_t size, phys_addr_t align, int nid, 212e1720feeSMike Rapoport enum memblock_flags flags) 21379442ed1STang Chen { 21479442ed1STang Chen phys_addr_t this_start, this_end, cand; 21579442ed1STang Chen u64 i; 21679442ed1STang Chen 217fc6daaf9STony Luck for_each_free_mem_range(i, nid, flags, &this_start, &this_end, NULL) { 21879442ed1STang Chen this_start = clamp(this_start, start, end); 21979442ed1STang Chen this_end = clamp(this_end, start, end); 22079442ed1STang Chen 22179442ed1STang Chen cand = round_up(this_start, align); 22279442ed1STang Chen if (cand < this_end && this_end - cand >= size) 22379442ed1STang Chen return cand; 22479442ed1STang Chen } 22579442ed1STang Chen 22679442ed1STang Chen return 0; 22779442ed1STang Chen } 22879442ed1STang Chen 2297bd0b0f0STejun Heo /** 2301402899eSTang Chen * __memblock_find_range_top_down - find free area utility, in top-down 2311402899eSTang Chen * @start: start of candidate range 23247cec443SMike Rapoport * @end: end of candidate range, can be %MEMBLOCK_ALLOC_ANYWHERE or 23347cec443SMike Rapoport * %MEMBLOCK_ALLOC_ACCESSIBLE 2341402899eSTang Chen * @size: size of free area to find 2351402899eSTang Chen * @align: alignment of free area to find 236b1154233SGrygorii Strashko * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 237fc6daaf9STony Luck * @flags: pick from blocks based on memory attributes 2381402899eSTang Chen * 2391402899eSTang Chen * Utility called from memblock_find_in_range_node(), find free area top-down. 2401402899eSTang Chen * 24147cec443SMike Rapoport * Return: 24279442ed1STang Chen * Found address on success, 0 on failure. 2431402899eSTang Chen */ 2441402899eSTang Chen static phys_addr_t __init_memblock 2451402899eSTang Chen __memblock_find_range_top_down(phys_addr_t start, phys_addr_t end, 246fc6daaf9STony Luck phys_addr_t size, phys_addr_t align, int nid, 247e1720feeSMike Rapoport enum memblock_flags flags) 2481402899eSTang Chen { 2491402899eSTang Chen phys_addr_t this_start, this_end, cand; 2501402899eSTang Chen u64 i; 2511402899eSTang Chen 252fc6daaf9STony Luck for_each_free_mem_range_reverse(i, nid, flags, &this_start, &this_end, 253fc6daaf9STony Luck NULL) { 2541402899eSTang Chen this_start = clamp(this_start, start, end); 2551402899eSTang Chen this_end = clamp(this_end, start, end); 2561402899eSTang Chen 2571402899eSTang Chen if (this_end < size) 2581402899eSTang Chen continue; 2591402899eSTang Chen 2601402899eSTang Chen cand = round_down(this_end - size, align); 2611402899eSTang Chen if (cand >= this_start) 2621402899eSTang Chen return cand; 2631402899eSTang Chen } 2641402899eSTang Chen 2651402899eSTang Chen return 0; 2661402899eSTang Chen } 2671402899eSTang Chen 2681402899eSTang Chen /** 2697bd0b0f0STejun Heo * memblock_find_in_range_node - find free area in given range and node 2707bd0b0f0STejun Heo * @size: size of free area to find 2717bd0b0f0STejun Heo * @align: alignment of free area to find 27287029ee9SGrygorii Strashko * @start: start of candidate range 27347cec443SMike Rapoport * @end: end of candidate range, can be %MEMBLOCK_ALLOC_ANYWHERE or 27447cec443SMike Rapoport * %MEMBLOCK_ALLOC_ACCESSIBLE 275b1154233SGrygorii Strashko * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 276fc6daaf9STony Luck * @flags: pick from blocks based on memory attributes 2777bd0b0f0STejun Heo * 2787bd0b0f0STejun Heo * Find @size free area aligned to @align in the specified range and node. 2797bd0b0f0STejun Heo * 28047cec443SMike Rapoport * Return: 28179442ed1STang Chen * Found address on success, 0 on failure. 2826ed311b2SBenjamin Herrenschmidt */ 283c366ea89SMike Rapoport static phys_addr_t __init_memblock memblock_find_in_range_node(phys_addr_t size, 28487029ee9SGrygorii Strashko phys_addr_t align, phys_addr_t start, 285e1720feeSMike Rapoport phys_addr_t end, int nid, 286e1720feeSMike Rapoport enum memblock_flags flags) 287f7210e6cSTang Chen { 288f7210e6cSTang Chen /* pump up @end */ 289fed84c78SQian Cai if (end == MEMBLOCK_ALLOC_ACCESSIBLE || 290fed84c78SQian Cai end == MEMBLOCK_ALLOC_KASAN) 291f7210e6cSTang Chen end = memblock.current_limit; 292f7210e6cSTang Chen 293f7210e6cSTang Chen /* avoid allocating the first page */ 294f7210e6cSTang Chen start = max_t(phys_addr_t, start, PAGE_SIZE); 295f7210e6cSTang Chen end = max(start, end); 29679442ed1STang Chen 2972dcb3964SRoman Gushchin if (memblock_bottom_up()) 2982dcb3964SRoman Gushchin return __memblock_find_range_bottom_up(start, end, size, align, 2992dcb3964SRoman Gushchin nid, flags); 3002dcb3964SRoman Gushchin else 3012dcb3964SRoman Gushchin return __memblock_find_range_top_down(start, end, size, align, 3022dcb3964SRoman Gushchin nid, flags); 303f7210e6cSTang Chen } 3046ed311b2SBenjamin Herrenschmidt 3057bd0b0f0STejun Heo /** 3067bd0b0f0STejun Heo * memblock_find_in_range - find free area in given range 3077bd0b0f0STejun Heo * @start: start of candidate range 30847cec443SMike Rapoport * @end: end of candidate range, can be %MEMBLOCK_ALLOC_ANYWHERE or 30947cec443SMike Rapoport * %MEMBLOCK_ALLOC_ACCESSIBLE 3107bd0b0f0STejun Heo * @size: size of free area to find 3117bd0b0f0STejun Heo * @align: alignment of free area to find 3127bd0b0f0STejun Heo * 3137bd0b0f0STejun Heo * Find @size free area aligned to @align in the specified range. 3147bd0b0f0STejun Heo * 31547cec443SMike Rapoport * Return: 31679442ed1STang Chen * Found address on success, 0 on failure. 3177bd0b0f0STejun Heo */ 3187bd0b0f0STejun Heo phys_addr_t __init_memblock memblock_find_in_range(phys_addr_t start, 3197bd0b0f0STejun Heo phys_addr_t end, phys_addr_t size, 3207bd0b0f0STejun Heo phys_addr_t align) 3217bd0b0f0STejun Heo { 322a3f5bafcSTony Luck phys_addr_t ret; 323e1720feeSMike Rapoport enum memblock_flags flags = choose_memblock_flags(); 324a3f5bafcSTony Luck 325a3f5bafcSTony Luck again: 326a3f5bafcSTony Luck ret = memblock_find_in_range_node(size, align, start, end, 327a3f5bafcSTony Luck NUMA_NO_NODE, flags); 328a3f5bafcSTony Luck 329a3f5bafcSTony Luck if (!ret && (flags & MEMBLOCK_MIRROR)) { 330a3f5bafcSTony Luck pr_warn("Could not allocate %pap bytes of mirrored memory\n", 331a3f5bafcSTony Luck &size); 332a3f5bafcSTony Luck flags &= ~MEMBLOCK_MIRROR; 333a3f5bafcSTony Luck goto again; 334a3f5bafcSTony Luck } 335a3f5bafcSTony Luck 336a3f5bafcSTony Luck return ret; 3377bd0b0f0STejun Heo } 3387bd0b0f0STejun Heo 33910d06439SYinghai Lu static void __init_memblock memblock_remove_region(struct memblock_type *type, unsigned long r) 34095f72d1eSYinghai Lu { 3411440c4e2STejun Heo type->total_size -= type->regions[r].size; 3427c0caeb8STejun Heo memmove(&type->regions[r], &type->regions[r + 1], 3437c0caeb8STejun Heo (type->cnt - (r + 1)) * sizeof(type->regions[r])); 344e3239ff9SBenjamin Herrenschmidt type->cnt--; 34595f72d1eSYinghai Lu 3468f7a6605SBenjamin Herrenschmidt /* Special case for empty arrays */ 3478f7a6605SBenjamin Herrenschmidt if (type->cnt == 0) { 3481440c4e2STejun Heo WARN_ON(type->total_size != 0); 3498f7a6605SBenjamin Herrenschmidt type->cnt = 1; 3508f7a6605SBenjamin Herrenschmidt type->regions[0].base = 0; 3518f7a6605SBenjamin Herrenschmidt type->regions[0].size = 0; 35266a20757STang Chen type->regions[0].flags = 0; 3537c0caeb8STejun Heo memblock_set_region_node(&type->regions[0], MAX_NUMNODES); 3548f7a6605SBenjamin Herrenschmidt } 35595f72d1eSYinghai Lu } 35695f72d1eSYinghai Lu 357350e88baSMike Rapoport #ifndef CONFIG_ARCH_KEEP_MEMBLOCK 3583010f876SPavel Tatashin /** 35947cec443SMike Rapoport * memblock_discard - discard memory and reserved arrays if they were allocated 3603010f876SPavel Tatashin */ 3613010f876SPavel Tatashin void __init memblock_discard(void) 36229f67386SYinghai Lu { 3633010f876SPavel Tatashin phys_addr_t addr, size; 36429f67386SYinghai Lu 3653010f876SPavel Tatashin if (memblock.reserved.regions != memblock_reserved_init_regions) { 3663010f876SPavel Tatashin addr = __pa(memblock.reserved.regions); 3673010f876SPavel Tatashin size = PAGE_ALIGN(sizeof(struct memblock_region) * 36829f67386SYinghai Lu memblock.reserved.max); 3693010f876SPavel Tatashin __memblock_free_late(addr, size); 37029f67386SYinghai Lu } 37129f67386SYinghai Lu 37291b540f9SPavel Tatashin if (memblock.memory.regions != memblock_memory_init_regions) { 3733010f876SPavel Tatashin addr = __pa(memblock.memory.regions); 3743010f876SPavel Tatashin size = PAGE_ALIGN(sizeof(struct memblock_region) * 3755e270e25SPhilipp Hachtmann memblock.memory.max); 3763010f876SPavel Tatashin __memblock_free_late(addr, size); 3775e270e25SPhilipp Hachtmann } 3789f3d5eaaSMike Rapoport 3799f3d5eaaSMike Rapoport memblock_memory = NULL; 3803010f876SPavel Tatashin } 3815e270e25SPhilipp Hachtmann #endif 3825e270e25SPhilipp Hachtmann 38348c3b583SGreg Pearson /** 38448c3b583SGreg Pearson * memblock_double_array - double the size of the memblock regions array 38548c3b583SGreg Pearson * @type: memblock type of the regions array being doubled 38648c3b583SGreg Pearson * @new_area_start: starting address of memory range to avoid overlap with 38748c3b583SGreg Pearson * @new_area_size: size of memory range to avoid overlap with 38848c3b583SGreg Pearson * 38948c3b583SGreg Pearson * Double the size of the @type regions array. If memblock is being used to 39048c3b583SGreg Pearson * allocate memory for a new reserved regions array and there is a previously 39148c3b583SGreg Pearson * allocated memory range [@new_area_start, @new_area_start + @new_area_size] 39248c3b583SGreg Pearson * waiting to be reserved, ensure the memory used by the new array does 39348c3b583SGreg Pearson * not overlap. 39448c3b583SGreg Pearson * 39547cec443SMike Rapoport * Return: 39648c3b583SGreg Pearson * 0 on success, -1 on failure. 39748c3b583SGreg Pearson */ 39848c3b583SGreg Pearson static int __init_memblock memblock_double_array(struct memblock_type *type, 39948c3b583SGreg Pearson phys_addr_t new_area_start, 40048c3b583SGreg Pearson phys_addr_t new_area_size) 401142b45a7SBenjamin Herrenschmidt { 402142b45a7SBenjamin Herrenschmidt struct memblock_region *new_array, *old_array; 40329f67386SYinghai Lu phys_addr_t old_alloc_size, new_alloc_size; 404a36aab89SMike Rapoport phys_addr_t old_size, new_size, addr, new_end; 405142b45a7SBenjamin Herrenschmidt int use_slab = slab_is_available(); 406181eb394SGavin Shan int *in_slab; 407142b45a7SBenjamin Herrenschmidt 408142b45a7SBenjamin Herrenschmidt /* We don't allow resizing until we know about the reserved regions 409142b45a7SBenjamin Herrenschmidt * of memory that aren't suitable for allocation 410142b45a7SBenjamin Herrenschmidt */ 411142b45a7SBenjamin Herrenschmidt if (!memblock_can_resize) 412142b45a7SBenjamin Herrenschmidt return -1; 413142b45a7SBenjamin Herrenschmidt 414142b45a7SBenjamin Herrenschmidt /* Calculate new doubled size */ 415142b45a7SBenjamin Herrenschmidt old_size = type->max * sizeof(struct memblock_region); 416142b45a7SBenjamin Herrenschmidt new_size = old_size << 1; 41729f67386SYinghai Lu /* 41829f67386SYinghai Lu * We need to allocated new one align to PAGE_SIZE, 41929f67386SYinghai Lu * so we can free them completely later. 42029f67386SYinghai Lu */ 42129f67386SYinghai Lu old_alloc_size = PAGE_ALIGN(old_size); 42229f67386SYinghai Lu new_alloc_size = PAGE_ALIGN(new_size); 423142b45a7SBenjamin Herrenschmidt 424181eb394SGavin Shan /* Retrieve the slab flag */ 425181eb394SGavin Shan if (type == &memblock.memory) 426181eb394SGavin Shan in_slab = &memblock_memory_in_slab; 427181eb394SGavin Shan else 428181eb394SGavin Shan in_slab = &memblock_reserved_in_slab; 429181eb394SGavin Shan 430a2974133SMike Rapoport /* Try to find some space for it */ 431142b45a7SBenjamin Herrenschmidt if (use_slab) { 432142b45a7SBenjamin Herrenschmidt new_array = kmalloc(new_size, GFP_KERNEL); 4331f5026a7STejun Heo addr = new_array ? __pa(new_array) : 0; 4344e2f0775SGavin Shan } else { 43548c3b583SGreg Pearson /* only exclude range when trying to double reserved.regions */ 43648c3b583SGreg Pearson if (type != &memblock.reserved) 43748c3b583SGreg Pearson new_area_start = new_area_size = 0; 43848c3b583SGreg Pearson 43948c3b583SGreg Pearson addr = memblock_find_in_range(new_area_start + new_area_size, 44048c3b583SGreg Pearson memblock.current_limit, 44129f67386SYinghai Lu new_alloc_size, PAGE_SIZE); 44248c3b583SGreg Pearson if (!addr && new_area_size) 44348c3b583SGreg Pearson addr = memblock_find_in_range(0, 44448c3b583SGreg Pearson min(new_area_start, memblock.current_limit), 44529f67386SYinghai Lu new_alloc_size, PAGE_SIZE); 44648c3b583SGreg Pearson 44715674868SSachin Kamat new_array = addr ? __va(addr) : NULL; 4484e2f0775SGavin Shan } 4491f5026a7STejun Heo if (!addr) { 450142b45a7SBenjamin Herrenschmidt pr_err("memblock: Failed to double %s array from %ld to %ld entries !\n", 4510262d9c8SHeiko Carstens type->name, type->max, type->max * 2); 452142b45a7SBenjamin Herrenschmidt return -1; 453142b45a7SBenjamin Herrenschmidt } 454142b45a7SBenjamin Herrenschmidt 455a36aab89SMike Rapoport new_end = addr + new_size - 1; 456a36aab89SMike Rapoport memblock_dbg("memblock: %s is doubled to %ld at [%pa-%pa]", 457a36aab89SMike Rapoport type->name, type->max * 2, &addr, &new_end); 458ea9e4376SYinghai Lu 459fd07383bSAndrew Morton /* 460fd07383bSAndrew Morton * Found space, we now need to move the array over before we add the 461fd07383bSAndrew Morton * reserved region since it may be our reserved array itself that is 462fd07383bSAndrew Morton * full. 463142b45a7SBenjamin Herrenschmidt */ 464142b45a7SBenjamin Herrenschmidt memcpy(new_array, type->regions, old_size); 465142b45a7SBenjamin Herrenschmidt memset(new_array + type->max, 0, old_size); 466142b45a7SBenjamin Herrenschmidt old_array = type->regions; 467142b45a7SBenjamin Herrenschmidt type->regions = new_array; 468142b45a7SBenjamin Herrenschmidt type->max <<= 1; 469142b45a7SBenjamin Herrenschmidt 470fd07383bSAndrew Morton /* Free old array. We needn't free it if the array is the static one */ 471181eb394SGavin Shan if (*in_slab) 472181eb394SGavin Shan kfree(old_array); 473181eb394SGavin Shan else if (old_array != memblock_memory_init_regions && 474142b45a7SBenjamin Herrenschmidt old_array != memblock_reserved_init_regions) 47529f67386SYinghai Lu memblock_free(__pa(old_array), old_alloc_size); 476142b45a7SBenjamin Herrenschmidt 477fd07383bSAndrew Morton /* 478fd07383bSAndrew Morton * Reserve the new array if that comes from the memblock. Otherwise, we 479fd07383bSAndrew Morton * needn't do it 480181eb394SGavin Shan */ 481181eb394SGavin Shan if (!use_slab) 48229f67386SYinghai Lu BUG_ON(memblock_reserve(addr, new_alloc_size)); 483181eb394SGavin Shan 484181eb394SGavin Shan /* Update slab flag */ 485181eb394SGavin Shan *in_slab = use_slab; 486181eb394SGavin Shan 487142b45a7SBenjamin Herrenschmidt return 0; 488142b45a7SBenjamin Herrenschmidt } 489142b45a7SBenjamin Herrenschmidt 490784656f9STejun Heo /** 491784656f9STejun Heo * memblock_merge_regions - merge neighboring compatible regions 492784656f9STejun Heo * @type: memblock type to scan 493784656f9STejun Heo * 494784656f9STejun Heo * Scan @type and merge neighboring compatible regions. 495784656f9STejun Heo */ 496784656f9STejun Heo static void __init_memblock memblock_merge_regions(struct memblock_type *type) 497784656f9STejun Heo { 498784656f9STejun Heo int i = 0; 499784656f9STejun Heo 500784656f9STejun Heo /* cnt never goes below 1 */ 501784656f9STejun Heo while (i < type->cnt - 1) { 502784656f9STejun Heo struct memblock_region *this = &type->regions[i]; 503784656f9STejun Heo struct memblock_region *next = &type->regions[i + 1]; 504784656f9STejun Heo 5057c0caeb8STejun Heo if (this->base + this->size != next->base || 5067c0caeb8STejun Heo memblock_get_region_node(this) != 50766a20757STang Chen memblock_get_region_node(next) || 50866a20757STang Chen this->flags != next->flags) { 509784656f9STejun Heo BUG_ON(this->base + this->size > next->base); 510784656f9STejun Heo i++; 511784656f9STejun Heo continue; 512784656f9STejun Heo } 513784656f9STejun Heo 514784656f9STejun Heo this->size += next->size; 515c0232ae8SLin Feng /* move forward from next + 1, index of which is i + 2 */ 516c0232ae8SLin Feng memmove(next, next + 1, (type->cnt - (i + 2)) * sizeof(*next)); 517784656f9STejun Heo type->cnt--; 518784656f9STejun Heo } 519784656f9STejun Heo } 520784656f9STejun Heo 521784656f9STejun Heo /** 522784656f9STejun Heo * memblock_insert_region - insert new memblock region 523784656f9STejun Heo * @type: memblock type to insert into 524784656f9STejun Heo * @idx: index for the insertion point 525784656f9STejun Heo * @base: base address of the new region 526784656f9STejun Heo * @size: size of the new region 527209ff86dSTang Chen * @nid: node id of the new region 52866a20757STang Chen * @flags: flags of the new region 529784656f9STejun Heo * 530784656f9STejun Heo * Insert new memblock region [@base, @base + @size) into @type at @idx. 531412d0008SAlexander Kuleshov * @type must already have extra room to accommodate the new region. 532784656f9STejun Heo */ 533784656f9STejun Heo static void __init_memblock memblock_insert_region(struct memblock_type *type, 534784656f9STejun Heo int idx, phys_addr_t base, 53566a20757STang Chen phys_addr_t size, 536e1720feeSMike Rapoport int nid, 537e1720feeSMike Rapoport enum memblock_flags flags) 538784656f9STejun Heo { 539784656f9STejun Heo struct memblock_region *rgn = &type->regions[idx]; 540784656f9STejun Heo 541784656f9STejun Heo BUG_ON(type->cnt >= type->max); 542784656f9STejun Heo memmove(rgn + 1, rgn, (type->cnt - idx) * sizeof(*rgn)); 543784656f9STejun Heo rgn->base = base; 544784656f9STejun Heo rgn->size = size; 54566a20757STang Chen rgn->flags = flags; 5467c0caeb8STejun Heo memblock_set_region_node(rgn, nid); 547784656f9STejun Heo type->cnt++; 5481440c4e2STejun Heo type->total_size += size; 549784656f9STejun Heo } 550784656f9STejun Heo 551784656f9STejun Heo /** 552f1af9d3aSPhilipp Hachtmann * memblock_add_range - add new memblock region 553784656f9STejun Heo * @type: memblock type to add new region into 554784656f9STejun Heo * @base: base address of the new region 555784656f9STejun Heo * @size: size of the new region 5567fb0bc3fSTejun Heo * @nid: nid of the new region 55766a20757STang Chen * @flags: flags of the new region 558784656f9STejun Heo * 559784656f9STejun Heo * Add new memblock region [@base, @base + @size) into @type. The new region 560784656f9STejun Heo * is allowed to overlap with existing ones - overlaps don't affect already 561784656f9STejun Heo * existing regions. @type is guaranteed to be minimal (all neighbouring 562784656f9STejun Heo * compatible regions are merged) after the addition. 563784656f9STejun Heo * 56447cec443SMike Rapoport * Return: 565784656f9STejun Heo * 0 on success, -errno on failure. 566784656f9STejun Heo */ 56702634a44SAnshuman Khandual static int __init_memblock memblock_add_range(struct memblock_type *type, 56866a20757STang Chen phys_addr_t base, phys_addr_t size, 569e1720feeSMike Rapoport int nid, enum memblock_flags flags) 57095f72d1eSYinghai Lu { 571784656f9STejun Heo bool insert = false; 572eb18f1b5STejun Heo phys_addr_t obase = base; 573eb18f1b5STejun Heo phys_addr_t end = base + memblock_cap_size(base, &size); 5748c9c1701SAlexander Kuleshov int idx, nr_new; 5758c9c1701SAlexander Kuleshov struct memblock_region *rgn; 57695f72d1eSYinghai Lu 577b3dc627cSTejun Heo if (!size) 578b3dc627cSTejun Heo return 0; 579b3dc627cSTejun Heo 580784656f9STejun Heo /* special case for empty array */ 581784656f9STejun Heo if (type->regions[0].size == 0) { 5821440c4e2STejun Heo WARN_ON(type->cnt != 1 || type->total_size); 583784656f9STejun Heo type->regions[0].base = base; 584784656f9STejun Heo type->regions[0].size = size; 58566a20757STang Chen type->regions[0].flags = flags; 5867fb0bc3fSTejun Heo memblock_set_region_node(&type->regions[0], nid); 5871440c4e2STejun Heo type->total_size = size; 588784656f9STejun Heo return 0; 589784656f9STejun Heo } 590784656f9STejun Heo repeat: 591784656f9STejun Heo /* 592784656f9STejun Heo * The following is executed twice. Once with %false @insert and 593784656f9STejun Heo * then with %true. The first counts the number of regions needed 594412d0008SAlexander Kuleshov * to accommodate the new area. The second actually inserts them. 595784656f9STejun Heo */ 596784656f9STejun Heo base = obase; 597784656f9STejun Heo nr_new = 0; 598784656f9STejun Heo 59966e8b438SGioh Kim for_each_memblock_type(idx, type, rgn) { 600784656f9STejun Heo phys_addr_t rbase = rgn->base; 601784656f9STejun Heo phys_addr_t rend = rbase + rgn->size; 6028f7a6605SBenjamin Herrenschmidt 603784656f9STejun Heo if (rbase >= end) 6048f7a6605SBenjamin Herrenschmidt break; 605784656f9STejun Heo if (rend <= base) 606784656f9STejun Heo continue; 607784656f9STejun Heo /* 608784656f9STejun Heo * @rgn overlaps. If it separates the lower part of new 609784656f9STejun Heo * area, insert that portion. 6108f7a6605SBenjamin Herrenschmidt */ 611784656f9STejun Heo if (rbase > base) { 612a9ee6cf5SMike Rapoport #ifdef CONFIG_NUMA 613c0a29498SWei Yang WARN_ON(nid != memblock_get_region_node(rgn)); 614c0a29498SWei Yang #endif 6154fcab5f4SWei Yang WARN_ON(flags != rgn->flags); 616784656f9STejun Heo nr_new++; 617784656f9STejun Heo if (insert) 6188c9c1701SAlexander Kuleshov memblock_insert_region(type, idx++, base, 61966a20757STang Chen rbase - base, nid, 62066a20757STang Chen flags); 621784656f9STejun Heo } 622784656f9STejun Heo /* area below @rend is dealt with, forget about it */ 623784656f9STejun Heo base = min(rend, end); 6248f7a6605SBenjamin Herrenschmidt } 6258f7a6605SBenjamin Herrenschmidt 626784656f9STejun Heo /* insert the remaining portion */ 627784656f9STejun Heo if (base < end) { 628784656f9STejun Heo nr_new++; 629784656f9STejun Heo if (insert) 6308c9c1701SAlexander Kuleshov memblock_insert_region(type, idx, base, end - base, 63166a20757STang Chen nid, flags); 6328f7a6605SBenjamin Herrenschmidt } 6338f7a6605SBenjamin Herrenschmidt 634ef3cc4dbSnimisolo if (!nr_new) 635ef3cc4dbSnimisolo return 0; 636ef3cc4dbSnimisolo 637784656f9STejun Heo /* 638784656f9STejun Heo * If this was the first round, resize array and repeat for actual 639784656f9STejun Heo * insertions; otherwise, merge and return. 6408f7a6605SBenjamin Herrenschmidt */ 641784656f9STejun Heo if (!insert) { 642784656f9STejun Heo while (type->cnt + nr_new > type->max) 64348c3b583SGreg Pearson if (memblock_double_array(type, obase, size) < 0) 644784656f9STejun Heo return -ENOMEM; 645784656f9STejun Heo insert = true; 646784656f9STejun Heo goto repeat; 64795f72d1eSYinghai Lu } else { 648784656f9STejun Heo memblock_merge_regions(type); 64995f72d1eSYinghai Lu return 0; 65095f72d1eSYinghai Lu } 651784656f9STejun Heo } 65295f72d1eSYinghai Lu 65348a833ccSMike Rapoport /** 65448a833ccSMike Rapoport * memblock_add_node - add new memblock region within a NUMA node 65548a833ccSMike Rapoport * @base: base address of the new region 65648a833ccSMike Rapoport * @size: size of the new region 65748a833ccSMike Rapoport * @nid: nid of the new region 65848a833ccSMike Rapoport * 65948a833ccSMike Rapoport * Add new memblock region [@base, @base + @size) to the "memory" 66048a833ccSMike Rapoport * type. See memblock_add_range() description for mode details 66148a833ccSMike Rapoport * 66248a833ccSMike Rapoport * Return: 66348a833ccSMike Rapoport * 0 on success, -errno on failure. 66448a833ccSMike Rapoport */ 6657fb0bc3fSTejun Heo int __init_memblock memblock_add_node(phys_addr_t base, phys_addr_t size, 6667fb0bc3fSTejun Heo int nid) 6677fb0bc3fSTejun Heo { 66800974b9aSGeert Uytterhoeven phys_addr_t end = base + size - 1; 66900974b9aSGeert Uytterhoeven 67000974b9aSGeert Uytterhoeven memblock_dbg("%s: [%pa-%pa] nid=%d %pS\n", __func__, 67100974b9aSGeert Uytterhoeven &base, &end, nid, (void *)_RET_IP_); 67200974b9aSGeert Uytterhoeven 673f1af9d3aSPhilipp Hachtmann return memblock_add_range(&memblock.memory, base, size, nid, 0); 6747fb0bc3fSTejun Heo } 6757fb0bc3fSTejun Heo 67648a833ccSMike Rapoport /** 67748a833ccSMike Rapoport * memblock_add - add new memblock region 67848a833ccSMike Rapoport * @base: base address of the new region 67948a833ccSMike Rapoport * @size: size of the new region 68048a833ccSMike Rapoport * 68148a833ccSMike Rapoport * Add new memblock region [@base, @base + @size) to the "memory" 68248a833ccSMike Rapoport * type. See memblock_add_range() description for mode details 68348a833ccSMike Rapoport * 68448a833ccSMike Rapoport * Return: 68548a833ccSMike Rapoport * 0 on success, -errno on failure. 68648a833ccSMike Rapoport */ 687f705ac4bSAlexander Kuleshov int __init_memblock memblock_add(phys_addr_t base, phys_addr_t size) 6886a4055bcSAlexander Kuleshov { 6895d63f81cSMiles Chen phys_addr_t end = base + size - 1; 6905d63f81cSMiles Chen 691a090d711SAnshuman Khandual memblock_dbg("%s: [%pa-%pa] %pS\n", __func__, 6925d63f81cSMiles Chen &base, &end, (void *)_RET_IP_); 6936a4055bcSAlexander Kuleshov 694f705ac4bSAlexander Kuleshov return memblock_add_range(&memblock.memory, base, size, MAX_NUMNODES, 0); 69595f72d1eSYinghai Lu } 69695f72d1eSYinghai Lu 6976a9ceb31STejun Heo /** 6986a9ceb31STejun Heo * memblock_isolate_range - isolate given range into disjoint memblocks 6996a9ceb31STejun Heo * @type: memblock type to isolate range for 7006a9ceb31STejun Heo * @base: base of range to isolate 7016a9ceb31STejun Heo * @size: size of range to isolate 7026a9ceb31STejun Heo * @start_rgn: out parameter for the start of isolated region 7036a9ceb31STejun Heo * @end_rgn: out parameter for the end of isolated region 7046a9ceb31STejun Heo * 7056a9ceb31STejun Heo * Walk @type and ensure that regions don't cross the boundaries defined by 7066a9ceb31STejun Heo * [@base, @base + @size). Crossing regions are split at the boundaries, 7076a9ceb31STejun Heo * which may create at most two more regions. The index of the first 7086a9ceb31STejun Heo * region inside the range is returned in *@start_rgn and end in *@end_rgn. 7096a9ceb31STejun Heo * 71047cec443SMike Rapoport * Return: 7116a9ceb31STejun Heo * 0 on success, -errno on failure. 7126a9ceb31STejun Heo */ 7136a9ceb31STejun Heo static int __init_memblock memblock_isolate_range(struct memblock_type *type, 7146a9ceb31STejun Heo phys_addr_t base, phys_addr_t size, 7156a9ceb31STejun Heo int *start_rgn, int *end_rgn) 7166a9ceb31STejun Heo { 717eb18f1b5STejun Heo phys_addr_t end = base + memblock_cap_size(base, &size); 7188c9c1701SAlexander Kuleshov int idx; 7198c9c1701SAlexander Kuleshov struct memblock_region *rgn; 7206a9ceb31STejun Heo 7216a9ceb31STejun Heo *start_rgn = *end_rgn = 0; 7226a9ceb31STejun Heo 723b3dc627cSTejun Heo if (!size) 724b3dc627cSTejun Heo return 0; 725b3dc627cSTejun Heo 7266a9ceb31STejun Heo /* we'll create at most two more regions */ 7276a9ceb31STejun Heo while (type->cnt + 2 > type->max) 72848c3b583SGreg Pearson if (memblock_double_array(type, base, size) < 0) 7296a9ceb31STejun Heo return -ENOMEM; 7306a9ceb31STejun Heo 73166e8b438SGioh Kim for_each_memblock_type(idx, type, rgn) { 7326a9ceb31STejun Heo phys_addr_t rbase = rgn->base; 7336a9ceb31STejun Heo phys_addr_t rend = rbase + rgn->size; 7346a9ceb31STejun Heo 7356a9ceb31STejun Heo if (rbase >= end) 7366a9ceb31STejun Heo break; 7376a9ceb31STejun Heo if (rend <= base) 7386a9ceb31STejun Heo continue; 7396a9ceb31STejun Heo 7406a9ceb31STejun Heo if (rbase < base) { 7416a9ceb31STejun Heo /* 7426a9ceb31STejun Heo * @rgn intersects from below. Split and continue 7436a9ceb31STejun Heo * to process the next region - the new top half. 7446a9ceb31STejun Heo */ 7456a9ceb31STejun Heo rgn->base = base; 7461440c4e2STejun Heo rgn->size -= base - rbase; 7471440c4e2STejun Heo type->total_size -= base - rbase; 7488c9c1701SAlexander Kuleshov memblock_insert_region(type, idx, rbase, base - rbase, 74966a20757STang Chen memblock_get_region_node(rgn), 75066a20757STang Chen rgn->flags); 7516a9ceb31STejun Heo } else if (rend > end) { 7526a9ceb31STejun Heo /* 7536a9ceb31STejun Heo * @rgn intersects from above. Split and redo the 7546a9ceb31STejun Heo * current region - the new bottom half. 7556a9ceb31STejun Heo */ 7566a9ceb31STejun Heo rgn->base = end; 7571440c4e2STejun Heo rgn->size -= end - rbase; 7581440c4e2STejun Heo type->total_size -= end - rbase; 7598c9c1701SAlexander Kuleshov memblock_insert_region(type, idx--, rbase, end - rbase, 76066a20757STang Chen memblock_get_region_node(rgn), 76166a20757STang Chen rgn->flags); 7626a9ceb31STejun Heo } else { 7636a9ceb31STejun Heo /* @rgn is fully contained, record it */ 7646a9ceb31STejun Heo if (!*end_rgn) 7658c9c1701SAlexander Kuleshov *start_rgn = idx; 7668c9c1701SAlexander Kuleshov *end_rgn = idx + 1; 7676a9ceb31STejun Heo } 7686a9ceb31STejun Heo } 7696a9ceb31STejun Heo 7706a9ceb31STejun Heo return 0; 7716a9ceb31STejun Heo } 7726a9ceb31STejun Heo 77335bd16a2SAlexander Kuleshov static int __init_memblock memblock_remove_range(struct memblock_type *type, 7748f7a6605SBenjamin Herrenschmidt phys_addr_t base, phys_addr_t size) 77595f72d1eSYinghai Lu { 77671936180STejun Heo int start_rgn, end_rgn; 77771936180STejun Heo int i, ret; 77895f72d1eSYinghai Lu 77971936180STejun Heo ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); 78071936180STejun Heo if (ret) 78171936180STejun Heo return ret; 78295f72d1eSYinghai Lu 78371936180STejun Heo for (i = end_rgn - 1; i >= start_rgn; i--) 78471936180STejun Heo memblock_remove_region(type, i); 78595f72d1eSYinghai Lu return 0; 78695f72d1eSYinghai Lu } 78795f72d1eSYinghai Lu 788581adcbeSTejun Heo int __init_memblock memblock_remove(phys_addr_t base, phys_addr_t size) 78995f72d1eSYinghai Lu { 79025cf23d7SMinchan Kim phys_addr_t end = base + size - 1; 79125cf23d7SMinchan Kim 792a090d711SAnshuman Khandual memblock_dbg("%s: [%pa-%pa] %pS\n", __func__, 79325cf23d7SMinchan Kim &base, &end, (void *)_RET_IP_); 79425cf23d7SMinchan Kim 795f1af9d3aSPhilipp Hachtmann return memblock_remove_range(&memblock.memory, base, size); 79695f72d1eSYinghai Lu } 79795f72d1eSYinghai Lu 7984d72868cSMike Rapoport /** 7994d72868cSMike Rapoport * memblock_free - free boot memory block 8004d72868cSMike Rapoport * @base: phys starting address of the boot memory block 8014d72868cSMike Rapoport * @size: size of the boot memory block in bytes 8024d72868cSMike Rapoport * 8034d72868cSMike Rapoport * Free boot memory block previously allocated by memblock_alloc_xx() API. 8044d72868cSMike Rapoport * The freeing memory will not be released to the buddy allocator. 8054d72868cSMike Rapoport */ 806581adcbeSTejun Heo int __init_memblock memblock_free(phys_addr_t base, phys_addr_t size) 80795f72d1eSYinghai Lu { 8085d63f81cSMiles Chen phys_addr_t end = base + size - 1; 8095d63f81cSMiles Chen 810a090d711SAnshuman Khandual memblock_dbg("%s: [%pa-%pa] %pS\n", __func__, 8115d63f81cSMiles Chen &base, &end, (void *)_RET_IP_); 81224aa0788STejun Heo 8139099daedSCatalin Marinas kmemleak_free_part_phys(base, size); 814f1af9d3aSPhilipp Hachtmann return memblock_remove_range(&memblock.reserved, base, size); 81595f72d1eSYinghai Lu } 81695f72d1eSYinghai Lu 817f705ac4bSAlexander Kuleshov int __init_memblock memblock_reserve(phys_addr_t base, phys_addr_t size) 81895f72d1eSYinghai Lu { 8195d63f81cSMiles Chen phys_addr_t end = base + size - 1; 8205d63f81cSMiles Chen 821a090d711SAnshuman Khandual memblock_dbg("%s: [%pa-%pa] %pS\n", __func__, 8225d63f81cSMiles Chen &base, &end, (void *)_RET_IP_); 82395f72d1eSYinghai Lu 824f705ac4bSAlexander Kuleshov return memblock_add_range(&memblock.reserved, base, size, MAX_NUMNODES, 0); 82595f72d1eSYinghai Lu } 82695f72d1eSYinghai Lu 82702634a44SAnshuman Khandual #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP 82802634a44SAnshuman Khandual int __init_memblock memblock_physmem_add(phys_addr_t base, phys_addr_t size) 82902634a44SAnshuman Khandual { 83002634a44SAnshuman Khandual phys_addr_t end = base + size - 1; 83102634a44SAnshuman Khandual 83202634a44SAnshuman Khandual memblock_dbg("%s: [%pa-%pa] %pS\n", __func__, 83302634a44SAnshuman Khandual &base, &end, (void *)_RET_IP_); 83402634a44SAnshuman Khandual 83577649905SDavid Hildenbrand return memblock_add_range(&physmem, base, size, MAX_NUMNODES, 0); 83602634a44SAnshuman Khandual } 83702634a44SAnshuman Khandual #endif 83802634a44SAnshuman Khandual 83935fd0808STejun Heo /** 84047cec443SMike Rapoport * memblock_setclr_flag - set or clear flag for a memory region 84147cec443SMike Rapoport * @base: base address of the region 84247cec443SMike Rapoport * @size: size of the region 84347cec443SMike Rapoport * @set: set or clear the flag 8448958b249SHaitao Shi * @flag: the flag to update 84566b16edfSTang Chen * 8464308ce17STony Luck * This function isolates region [@base, @base + @size), and sets/clears flag 84766b16edfSTang Chen * 84847cec443SMike Rapoport * Return: 0 on success, -errno on failure. 84966b16edfSTang Chen */ 8504308ce17STony Luck static int __init_memblock memblock_setclr_flag(phys_addr_t base, 8514308ce17STony Luck phys_addr_t size, int set, int flag) 85266b16edfSTang Chen { 85366b16edfSTang Chen struct memblock_type *type = &memblock.memory; 85466b16edfSTang Chen int i, ret, start_rgn, end_rgn; 85566b16edfSTang Chen 85666b16edfSTang Chen ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); 85766b16edfSTang Chen if (ret) 85866b16edfSTang Chen return ret; 85966b16edfSTang Chen 860fe145124SMike Rapoport for (i = start_rgn; i < end_rgn; i++) { 861fe145124SMike Rapoport struct memblock_region *r = &type->regions[i]; 862fe145124SMike Rapoport 8634308ce17STony Luck if (set) 864fe145124SMike Rapoport r->flags |= flag; 8654308ce17STony Luck else 866fe145124SMike Rapoport r->flags &= ~flag; 867fe145124SMike Rapoport } 86866b16edfSTang Chen 86966b16edfSTang Chen memblock_merge_regions(type); 87066b16edfSTang Chen return 0; 87166b16edfSTang Chen } 87266b16edfSTang Chen 87366b16edfSTang Chen /** 8744308ce17STony Luck * memblock_mark_hotplug - Mark hotpluggable memory with flag MEMBLOCK_HOTPLUG. 8754308ce17STony Luck * @base: the base phys addr of the region 8764308ce17STony Luck * @size: the size of the region 8774308ce17STony Luck * 87847cec443SMike Rapoport * Return: 0 on success, -errno on failure. 8794308ce17STony Luck */ 8804308ce17STony Luck int __init_memblock memblock_mark_hotplug(phys_addr_t base, phys_addr_t size) 8814308ce17STony Luck { 8824308ce17STony Luck return memblock_setclr_flag(base, size, 1, MEMBLOCK_HOTPLUG); 8834308ce17STony Luck } 8844308ce17STony Luck 8854308ce17STony Luck /** 88666b16edfSTang Chen * memblock_clear_hotplug - Clear flag MEMBLOCK_HOTPLUG for a specified region. 88766b16edfSTang Chen * @base: the base phys addr of the region 88866b16edfSTang Chen * @size: the size of the region 88966b16edfSTang Chen * 89047cec443SMike Rapoport * Return: 0 on success, -errno on failure. 89166b16edfSTang Chen */ 89266b16edfSTang Chen int __init_memblock memblock_clear_hotplug(phys_addr_t base, phys_addr_t size) 89366b16edfSTang Chen { 8944308ce17STony Luck return memblock_setclr_flag(base, size, 0, MEMBLOCK_HOTPLUG); 89566b16edfSTang Chen } 89666b16edfSTang Chen 89766b16edfSTang Chen /** 898a3f5bafcSTony Luck * memblock_mark_mirror - Mark mirrored memory with flag MEMBLOCK_MIRROR. 899a3f5bafcSTony Luck * @base: the base phys addr of the region 900a3f5bafcSTony Luck * @size: the size of the region 901a3f5bafcSTony Luck * 90247cec443SMike Rapoport * Return: 0 on success, -errno on failure. 903a3f5bafcSTony Luck */ 904a3f5bafcSTony Luck int __init_memblock memblock_mark_mirror(phys_addr_t base, phys_addr_t size) 905a3f5bafcSTony Luck { 906a3f5bafcSTony Luck system_has_some_mirror = true; 907a3f5bafcSTony Luck 908a3f5bafcSTony Luck return memblock_setclr_flag(base, size, 1, MEMBLOCK_MIRROR); 909a3f5bafcSTony Luck } 910a3f5bafcSTony Luck 911bf3d3cc5SArd Biesheuvel /** 912bf3d3cc5SArd Biesheuvel * memblock_mark_nomap - Mark a memory region with flag MEMBLOCK_NOMAP. 913bf3d3cc5SArd Biesheuvel * @base: the base phys addr of the region 914bf3d3cc5SArd Biesheuvel * @size: the size of the region 915bf3d3cc5SArd Biesheuvel * 9169092d4f7SMike Rapoport * The memory regions marked with %MEMBLOCK_NOMAP will not be added to the 9179092d4f7SMike Rapoport * direct mapping of the physical memory. These regions will still be 9189092d4f7SMike Rapoport * covered by the memory map. The struct page representing NOMAP memory 9199092d4f7SMike Rapoport * frames in the memory map will be PageReserved() 9209092d4f7SMike Rapoport * 92147cec443SMike Rapoport * Return: 0 on success, -errno on failure. 922bf3d3cc5SArd Biesheuvel */ 923bf3d3cc5SArd Biesheuvel int __init_memblock memblock_mark_nomap(phys_addr_t base, phys_addr_t size) 924bf3d3cc5SArd Biesheuvel { 925bf3d3cc5SArd Biesheuvel return memblock_setclr_flag(base, size, 1, MEMBLOCK_NOMAP); 926bf3d3cc5SArd Biesheuvel } 927a3f5bafcSTony Luck 928a3f5bafcSTony Luck /** 9294c546b8aSAKASHI Takahiro * memblock_clear_nomap - Clear flag MEMBLOCK_NOMAP for a specified region. 9304c546b8aSAKASHI Takahiro * @base: the base phys addr of the region 9314c546b8aSAKASHI Takahiro * @size: the size of the region 9324c546b8aSAKASHI Takahiro * 93347cec443SMike Rapoport * Return: 0 on success, -errno on failure. 9344c546b8aSAKASHI Takahiro */ 9354c546b8aSAKASHI Takahiro int __init_memblock memblock_clear_nomap(phys_addr_t base, phys_addr_t size) 9364c546b8aSAKASHI Takahiro { 9374c546b8aSAKASHI Takahiro return memblock_setclr_flag(base, size, 0, MEMBLOCK_NOMAP); 9384c546b8aSAKASHI Takahiro } 9394c546b8aSAKASHI Takahiro 9409f3d5eaaSMike Rapoport static bool should_skip_region(struct memblock_type *type, 9419f3d5eaaSMike Rapoport struct memblock_region *m, 9429f3d5eaaSMike Rapoport int nid, int flags) 943c9a688a3SMike Rapoport { 944c9a688a3SMike Rapoport int m_nid = memblock_get_region_node(m); 945c9a688a3SMike Rapoport 9469f3d5eaaSMike Rapoport /* we never skip regions when iterating memblock.reserved or physmem */ 9479f3d5eaaSMike Rapoport if (type != memblock_memory) 9489f3d5eaaSMike Rapoport return false; 9499f3d5eaaSMike Rapoport 950c9a688a3SMike Rapoport /* only memory regions are associated with nodes, check it */ 951c9a688a3SMike Rapoport if (nid != NUMA_NO_NODE && nid != m_nid) 952c9a688a3SMike Rapoport return true; 953c9a688a3SMike Rapoport 954c9a688a3SMike Rapoport /* skip hotpluggable memory regions if needed */ 95579e482e9SMike Rapoport if (movable_node_is_enabled() && memblock_is_hotpluggable(m) && 95679e482e9SMike Rapoport !(flags & MEMBLOCK_HOTPLUG)) 957c9a688a3SMike Rapoport return true; 958c9a688a3SMike Rapoport 959c9a688a3SMike Rapoport /* if we want mirror memory skip non-mirror memory regions */ 960c9a688a3SMike Rapoport if ((flags & MEMBLOCK_MIRROR) && !memblock_is_mirror(m)) 961c9a688a3SMike Rapoport return true; 962c9a688a3SMike Rapoport 963c9a688a3SMike Rapoport /* skip nomap memory unless we were asked for it explicitly */ 964c9a688a3SMike Rapoport if (!(flags & MEMBLOCK_NOMAP) && memblock_is_nomap(m)) 965c9a688a3SMike Rapoport return true; 966c9a688a3SMike Rapoport 967c9a688a3SMike Rapoport return false; 968c9a688a3SMike Rapoport } 969c9a688a3SMike Rapoport 9708e7a7f86SRobin Holt /** 971a2974133SMike Rapoport * __next_mem_range - next function for for_each_free_mem_range() etc. 97235fd0808STejun Heo * @idx: pointer to u64 loop variable 973b1154233SGrygorii Strashko * @nid: node selector, %NUMA_NO_NODE for all nodes 974fc6daaf9STony Luck * @flags: pick from blocks based on memory attributes 975f1af9d3aSPhilipp Hachtmann * @type_a: pointer to memblock_type from where the range is taken 976f1af9d3aSPhilipp Hachtmann * @type_b: pointer to memblock_type which excludes memory from being taken 977dad7557eSWanpeng Li * @out_start: ptr to phys_addr_t for start address of the range, can be %NULL 978dad7557eSWanpeng Li * @out_end: ptr to phys_addr_t for end address of the range, can be %NULL 979dad7557eSWanpeng Li * @out_nid: ptr to int for nid of the range, can be %NULL 98035fd0808STejun Heo * 981f1af9d3aSPhilipp Hachtmann * Find the first area from *@idx which matches @nid, fill the out 98235fd0808STejun Heo * parameters, and update *@idx for the next iteration. The lower 32bit of 983f1af9d3aSPhilipp Hachtmann * *@idx contains index into type_a and the upper 32bit indexes the 984f1af9d3aSPhilipp Hachtmann * areas before each region in type_b. For example, if type_b regions 98535fd0808STejun Heo * look like the following, 98635fd0808STejun Heo * 98735fd0808STejun Heo * 0:[0-16), 1:[32-48), 2:[128-130) 98835fd0808STejun Heo * 98935fd0808STejun Heo * The upper 32bit indexes the following regions. 99035fd0808STejun Heo * 99135fd0808STejun Heo * 0:[0-0), 1:[16-32), 2:[48-128), 3:[130-MAX) 99235fd0808STejun Heo * 99335fd0808STejun Heo * As both region arrays are sorted, the function advances the two indices 99435fd0808STejun Heo * in lockstep and returns each intersection. 99535fd0808STejun Heo */ 99677649905SDavid Hildenbrand void __next_mem_range(u64 *idx, int nid, enum memblock_flags flags, 997f1af9d3aSPhilipp Hachtmann struct memblock_type *type_a, 99877649905SDavid Hildenbrand struct memblock_type *type_b, phys_addr_t *out_start, 99935fd0808STejun Heo phys_addr_t *out_end, int *out_nid) 100035fd0808STejun Heo { 1001f1af9d3aSPhilipp Hachtmann int idx_a = *idx & 0xffffffff; 1002f1af9d3aSPhilipp Hachtmann int idx_b = *idx >> 32; 1003b1154233SGrygorii Strashko 1004f1af9d3aSPhilipp Hachtmann if (WARN_ONCE(nid == MAX_NUMNODES, 1005f1af9d3aSPhilipp Hachtmann "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n")) 1006560dca27SGrygorii Strashko nid = NUMA_NO_NODE; 100735fd0808STejun Heo 1008f1af9d3aSPhilipp Hachtmann for (; idx_a < type_a->cnt; idx_a++) { 1009f1af9d3aSPhilipp Hachtmann struct memblock_region *m = &type_a->regions[idx_a]; 1010f1af9d3aSPhilipp Hachtmann 101135fd0808STejun Heo phys_addr_t m_start = m->base; 101235fd0808STejun Heo phys_addr_t m_end = m->base + m->size; 1013f1af9d3aSPhilipp Hachtmann int m_nid = memblock_get_region_node(m); 101435fd0808STejun Heo 10159f3d5eaaSMike Rapoport if (should_skip_region(type_a, m, nid, flags)) 1016bf3d3cc5SArd Biesheuvel continue; 1017bf3d3cc5SArd Biesheuvel 1018f1af9d3aSPhilipp Hachtmann if (!type_b) { 1019f1af9d3aSPhilipp Hachtmann if (out_start) 1020f1af9d3aSPhilipp Hachtmann *out_start = m_start; 1021f1af9d3aSPhilipp Hachtmann if (out_end) 1022f1af9d3aSPhilipp Hachtmann *out_end = m_end; 1023f1af9d3aSPhilipp Hachtmann if (out_nid) 1024f1af9d3aSPhilipp Hachtmann *out_nid = m_nid; 1025f1af9d3aSPhilipp Hachtmann idx_a++; 1026f1af9d3aSPhilipp Hachtmann *idx = (u32)idx_a | (u64)idx_b << 32; 1027f1af9d3aSPhilipp Hachtmann return; 1028f1af9d3aSPhilipp Hachtmann } 102935fd0808STejun Heo 1030f1af9d3aSPhilipp Hachtmann /* scan areas before each reservation */ 1031f1af9d3aSPhilipp Hachtmann for (; idx_b < type_b->cnt + 1; idx_b++) { 1032f1af9d3aSPhilipp Hachtmann struct memblock_region *r; 1033f1af9d3aSPhilipp Hachtmann phys_addr_t r_start; 1034f1af9d3aSPhilipp Hachtmann phys_addr_t r_end; 1035f1af9d3aSPhilipp Hachtmann 1036f1af9d3aSPhilipp Hachtmann r = &type_b->regions[idx_b]; 1037f1af9d3aSPhilipp Hachtmann r_start = idx_b ? r[-1].base + r[-1].size : 0; 1038f1af9d3aSPhilipp Hachtmann r_end = idx_b < type_b->cnt ? 10391c4bc43dSStefan Agner r->base : PHYS_ADDR_MAX; 1040f1af9d3aSPhilipp Hachtmann 1041f1af9d3aSPhilipp Hachtmann /* 1042f1af9d3aSPhilipp Hachtmann * if idx_b advanced past idx_a, 1043f1af9d3aSPhilipp Hachtmann * break out to advance idx_a 1044f1af9d3aSPhilipp Hachtmann */ 104535fd0808STejun Heo if (r_start >= m_end) 104635fd0808STejun Heo break; 104735fd0808STejun Heo /* if the two regions intersect, we're done */ 104835fd0808STejun Heo if (m_start < r_end) { 104935fd0808STejun Heo if (out_start) 1050f1af9d3aSPhilipp Hachtmann *out_start = 1051f1af9d3aSPhilipp Hachtmann max(m_start, r_start); 105235fd0808STejun Heo if (out_end) 105335fd0808STejun Heo *out_end = min(m_end, r_end); 105435fd0808STejun Heo if (out_nid) 1055f1af9d3aSPhilipp Hachtmann *out_nid = m_nid; 105635fd0808STejun Heo /* 1057f1af9d3aSPhilipp Hachtmann * The region which ends first is 1058f1af9d3aSPhilipp Hachtmann * advanced for the next iteration. 105935fd0808STejun Heo */ 106035fd0808STejun Heo if (m_end <= r_end) 1061f1af9d3aSPhilipp Hachtmann idx_a++; 106235fd0808STejun Heo else 1063f1af9d3aSPhilipp Hachtmann idx_b++; 1064f1af9d3aSPhilipp Hachtmann *idx = (u32)idx_a | (u64)idx_b << 32; 106535fd0808STejun Heo return; 106635fd0808STejun Heo } 106735fd0808STejun Heo } 106835fd0808STejun Heo } 106935fd0808STejun Heo 107035fd0808STejun Heo /* signal end of iteration */ 107135fd0808STejun Heo *idx = ULLONG_MAX; 107235fd0808STejun Heo } 107335fd0808STejun Heo 10747bd0b0f0STejun Heo /** 1075f1af9d3aSPhilipp Hachtmann * __next_mem_range_rev - generic next function for for_each_*_range_rev() 1076f1af9d3aSPhilipp Hachtmann * 10777bd0b0f0STejun Heo * @idx: pointer to u64 loop variable 1078ad5ea8cdSAlexander Kuleshov * @nid: node selector, %NUMA_NO_NODE for all nodes 1079fc6daaf9STony Luck * @flags: pick from blocks based on memory attributes 1080f1af9d3aSPhilipp Hachtmann * @type_a: pointer to memblock_type from where the range is taken 1081f1af9d3aSPhilipp Hachtmann * @type_b: pointer to memblock_type which excludes memory from being taken 1082dad7557eSWanpeng Li * @out_start: ptr to phys_addr_t for start address of the range, can be %NULL 1083dad7557eSWanpeng Li * @out_end: ptr to phys_addr_t for end address of the range, can be %NULL 1084dad7557eSWanpeng Li * @out_nid: ptr to int for nid of the range, can be %NULL 10857bd0b0f0STejun Heo * 108647cec443SMike Rapoport * Finds the next range from type_a which is not marked as unsuitable 108747cec443SMike Rapoport * in type_b. 108847cec443SMike Rapoport * 1089f1af9d3aSPhilipp Hachtmann * Reverse of __next_mem_range(). 10907bd0b0f0STejun Heo */ 1091e1720feeSMike Rapoport void __init_memblock __next_mem_range_rev(u64 *idx, int nid, 1092e1720feeSMike Rapoport enum memblock_flags flags, 1093f1af9d3aSPhilipp Hachtmann struct memblock_type *type_a, 1094f1af9d3aSPhilipp Hachtmann struct memblock_type *type_b, 10957bd0b0f0STejun Heo phys_addr_t *out_start, 10967bd0b0f0STejun Heo phys_addr_t *out_end, int *out_nid) 10977bd0b0f0STejun Heo { 1098f1af9d3aSPhilipp Hachtmann int idx_a = *idx & 0xffffffff; 1099f1af9d3aSPhilipp Hachtmann int idx_b = *idx >> 32; 1100b1154233SGrygorii Strashko 1101560dca27SGrygorii Strashko if (WARN_ONCE(nid == MAX_NUMNODES, "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n")) 1102560dca27SGrygorii Strashko nid = NUMA_NO_NODE; 11037bd0b0f0STejun Heo 11047bd0b0f0STejun Heo if (*idx == (u64)ULLONG_MAX) { 1105f1af9d3aSPhilipp Hachtmann idx_a = type_a->cnt - 1; 1106e47608abSzijun_hu if (type_b != NULL) 1107f1af9d3aSPhilipp Hachtmann idx_b = type_b->cnt; 1108e47608abSzijun_hu else 1109e47608abSzijun_hu idx_b = 0; 11107bd0b0f0STejun Heo } 11117bd0b0f0STejun Heo 1112f1af9d3aSPhilipp Hachtmann for (; idx_a >= 0; idx_a--) { 1113f1af9d3aSPhilipp Hachtmann struct memblock_region *m = &type_a->regions[idx_a]; 1114f1af9d3aSPhilipp Hachtmann 11157bd0b0f0STejun Heo phys_addr_t m_start = m->base; 11167bd0b0f0STejun Heo phys_addr_t m_end = m->base + m->size; 1117f1af9d3aSPhilipp Hachtmann int m_nid = memblock_get_region_node(m); 11187bd0b0f0STejun Heo 11199f3d5eaaSMike Rapoport if (should_skip_region(type_a, m, nid, flags)) 1120bf3d3cc5SArd Biesheuvel continue; 1121bf3d3cc5SArd Biesheuvel 1122f1af9d3aSPhilipp Hachtmann if (!type_b) { 1123f1af9d3aSPhilipp Hachtmann if (out_start) 1124f1af9d3aSPhilipp Hachtmann *out_start = m_start; 1125f1af9d3aSPhilipp Hachtmann if (out_end) 1126f1af9d3aSPhilipp Hachtmann *out_end = m_end; 1127f1af9d3aSPhilipp Hachtmann if (out_nid) 1128f1af9d3aSPhilipp Hachtmann *out_nid = m_nid; 1129fb399b48Szijun_hu idx_a--; 1130f1af9d3aSPhilipp Hachtmann *idx = (u32)idx_a | (u64)idx_b << 32; 1131f1af9d3aSPhilipp Hachtmann return; 1132f1af9d3aSPhilipp Hachtmann } 11337bd0b0f0STejun Heo 1134f1af9d3aSPhilipp Hachtmann /* scan areas before each reservation */ 1135f1af9d3aSPhilipp Hachtmann for (; idx_b >= 0; idx_b--) { 1136f1af9d3aSPhilipp Hachtmann struct memblock_region *r; 1137f1af9d3aSPhilipp Hachtmann phys_addr_t r_start; 1138f1af9d3aSPhilipp Hachtmann phys_addr_t r_end; 1139f1af9d3aSPhilipp Hachtmann 1140f1af9d3aSPhilipp Hachtmann r = &type_b->regions[idx_b]; 1141f1af9d3aSPhilipp Hachtmann r_start = idx_b ? r[-1].base + r[-1].size : 0; 1142f1af9d3aSPhilipp Hachtmann r_end = idx_b < type_b->cnt ? 11431c4bc43dSStefan Agner r->base : PHYS_ADDR_MAX; 1144f1af9d3aSPhilipp Hachtmann /* 1145f1af9d3aSPhilipp Hachtmann * if idx_b advanced past idx_a, 1146f1af9d3aSPhilipp Hachtmann * break out to advance idx_a 1147f1af9d3aSPhilipp Hachtmann */ 1148f1af9d3aSPhilipp Hachtmann 11497bd0b0f0STejun Heo if (r_end <= m_start) 11507bd0b0f0STejun Heo break; 11517bd0b0f0STejun Heo /* if the two regions intersect, we're done */ 11527bd0b0f0STejun Heo if (m_end > r_start) { 11537bd0b0f0STejun Heo if (out_start) 11547bd0b0f0STejun Heo *out_start = max(m_start, r_start); 11557bd0b0f0STejun Heo if (out_end) 11567bd0b0f0STejun Heo *out_end = min(m_end, r_end); 11577bd0b0f0STejun Heo if (out_nid) 1158f1af9d3aSPhilipp Hachtmann *out_nid = m_nid; 11597bd0b0f0STejun Heo if (m_start >= r_start) 1160f1af9d3aSPhilipp Hachtmann idx_a--; 11617bd0b0f0STejun Heo else 1162f1af9d3aSPhilipp Hachtmann idx_b--; 1163f1af9d3aSPhilipp Hachtmann *idx = (u32)idx_a | (u64)idx_b << 32; 11647bd0b0f0STejun Heo return; 11657bd0b0f0STejun Heo } 11667bd0b0f0STejun Heo } 11677bd0b0f0STejun Heo } 1168f1af9d3aSPhilipp Hachtmann /* signal end of iteration */ 11697bd0b0f0STejun Heo *idx = ULLONG_MAX; 11707bd0b0f0STejun Heo } 11717bd0b0f0STejun Heo 11727c0caeb8STejun Heo /* 117345e79815SChen Chang * Common iterator interface used to define for_each_mem_pfn_range(). 11747c0caeb8STejun Heo */ 11757c0caeb8STejun Heo void __init_memblock __next_mem_pfn_range(int *idx, int nid, 11767c0caeb8STejun Heo unsigned long *out_start_pfn, 11777c0caeb8STejun Heo unsigned long *out_end_pfn, int *out_nid) 11787c0caeb8STejun Heo { 11797c0caeb8STejun Heo struct memblock_type *type = &memblock.memory; 11807c0caeb8STejun Heo struct memblock_region *r; 1181d622abf7SMike Rapoport int r_nid; 11827c0caeb8STejun Heo 11837c0caeb8STejun Heo while (++*idx < type->cnt) { 11847c0caeb8STejun Heo r = &type->regions[*idx]; 1185d622abf7SMike Rapoport r_nid = memblock_get_region_node(r); 11867c0caeb8STejun Heo 11877c0caeb8STejun Heo if (PFN_UP(r->base) >= PFN_DOWN(r->base + r->size)) 11887c0caeb8STejun Heo continue; 1189d622abf7SMike Rapoport if (nid == MAX_NUMNODES || nid == r_nid) 11907c0caeb8STejun Heo break; 11917c0caeb8STejun Heo } 11927c0caeb8STejun Heo if (*idx >= type->cnt) { 11937c0caeb8STejun Heo *idx = -1; 11947c0caeb8STejun Heo return; 11957c0caeb8STejun Heo } 11967c0caeb8STejun Heo 11977c0caeb8STejun Heo if (out_start_pfn) 11987c0caeb8STejun Heo *out_start_pfn = PFN_UP(r->base); 11997c0caeb8STejun Heo if (out_end_pfn) 12007c0caeb8STejun Heo *out_end_pfn = PFN_DOWN(r->base + r->size); 12017c0caeb8STejun Heo if (out_nid) 1202d622abf7SMike Rapoport *out_nid = r_nid; 12037c0caeb8STejun Heo } 12047c0caeb8STejun Heo 12057c0caeb8STejun Heo /** 12067c0caeb8STejun Heo * memblock_set_node - set node ID on memblock regions 12077c0caeb8STejun Heo * @base: base of area to set node ID for 12087c0caeb8STejun Heo * @size: size of area to set node ID for 1209e7e8de59STang Chen * @type: memblock type to set node ID for 12107c0caeb8STejun Heo * @nid: node ID to set 12117c0caeb8STejun Heo * 1212e7e8de59STang Chen * Set the nid of memblock @type regions in [@base, @base + @size) to @nid. 12137c0caeb8STejun Heo * Regions which cross the area boundaries are split as necessary. 12147c0caeb8STejun Heo * 121547cec443SMike Rapoport * Return: 12167c0caeb8STejun Heo * 0 on success, -errno on failure. 12177c0caeb8STejun Heo */ 12187c0caeb8STejun Heo int __init_memblock memblock_set_node(phys_addr_t base, phys_addr_t size, 1219e7e8de59STang Chen struct memblock_type *type, int nid) 12207c0caeb8STejun Heo { 1221a9ee6cf5SMike Rapoport #ifdef CONFIG_NUMA 12226a9ceb31STejun Heo int start_rgn, end_rgn; 12236a9ceb31STejun Heo int i, ret; 12247c0caeb8STejun Heo 12256a9ceb31STejun Heo ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); 12266a9ceb31STejun Heo if (ret) 12276a9ceb31STejun Heo return ret; 12287c0caeb8STejun Heo 12296a9ceb31STejun Heo for (i = start_rgn; i < end_rgn; i++) 1230e9d24ad3SWanpeng Li memblock_set_region_node(&type->regions[i], nid); 12317c0caeb8STejun Heo 12327c0caeb8STejun Heo memblock_merge_regions(type); 12333f08a302SMike Rapoport #endif 12347c0caeb8STejun Heo return 0; 12357c0caeb8STejun Heo } 12363f08a302SMike Rapoport 1237837566e7SAlexander Duyck #ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT 1238837566e7SAlexander Duyck /** 1239837566e7SAlexander Duyck * __next_mem_pfn_range_in_zone - iterator for for_each_*_range_in_zone() 1240837566e7SAlexander Duyck * 1241837566e7SAlexander Duyck * @idx: pointer to u64 loop variable 1242837566e7SAlexander Duyck * @zone: zone in which all of the memory blocks reside 1243837566e7SAlexander Duyck * @out_spfn: ptr to ulong for start pfn of the range, can be %NULL 1244837566e7SAlexander Duyck * @out_epfn: ptr to ulong for end pfn of the range, can be %NULL 1245837566e7SAlexander Duyck * 1246837566e7SAlexander Duyck * This function is meant to be a zone/pfn specific wrapper for the 1247837566e7SAlexander Duyck * for_each_mem_range type iterators. Specifically they are used in the 1248837566e7SAlexander Duyck * deferred memory init routines and as such we were duplicating much of 1249837566e7SAlexander Duyck * this logic throughout the code. So instead of having it in multiple 1250837566e7SAlexander Duyck * locations it seemed like it would make more sense to centralize this to 1251837566e7SAlexander Duyck * one new iterator that does everything they need. 1252837566e7SAlexander Duyck */ 1253837566e7SAlexander Duyck void __init_memblock 1254837566e7SAlexander Duyck __next_mem_pfn_range_in_zone(u64 *idx, struct zone *zone, 1255837566e7SAlexander Duyck unsigned long *out_spfn, unsigned long *out_epfn) 1256837566e7SAlexander Duyck { 1257837566e7SAlexander Duyck int zone_nid = zone_to_nid(zone); 1258837566e7SAlexander Duyck phys_addr_t spa, epa; 1259837566e7SAlexander Duyck int nid; 1260837566e7SAlexander Duyck 1261837566e7SAlexander Duyck __next_mem_range(idx, zone_nid, MEMBLOCK_NONE, 1262837566e7SAlexander Duyck &memblock.memory, &memblock.reserved, 1263837566e7SAlexander Duyck &spa, &epa, &nid); 1264837566e7SAlexander Duyck 1265837566e7SAlexander Duyck while (*idx != U64_MAX) { 1266837566e7SAlexander Duyck unsigned long epfn = PFN_DOWN(epa); 1267837566e7SAlexander Duyck unsigned long spfn = PFN_UP(spa); 1268837566e7SAlexander Duyck 1269837566e7SAlexander Duyck /* 1270837566e7SAlexander Duyck * Verify the end is at least past the start of the zone and 1271837566e7SAlexander Duyck * that we have at least one PFN to initialize. 1272837566e7SAlexander Duyck */ 1273837566e7SAlexander Duyck if (zone->zone_start_pfn < epfn && spfn < epfn) { 1274837566e7SAlexander Duyck /* if we went too far just stop searching */ 1275837566e7SAlexander Duyck if (zone_end_pfn(zone) <= spfn) { 1276837566e7SAlexander Duyck *idx = U64_MAX; 1277837566e7SAlexander Duyck break; 1278837566e7SAlexander Duyck } 1279837566e7SAlexander Duyck 1280837566e7SAlexander Duyck if (out_spfn) 1281837566e7SAlexander Duyck *out_spfn = max(zone->zone_start_pfn, spfn); 1282837566e7SAlexander Duyck if (out_epfn) 1283837566e7SAlexander Duyck *out_epfn = min(zone_end_pfn(zone), epfn); 1284837566e7SAlexander Duyck 1285837566e7SAlexander Duyck return; 1286837566e7SAlexander Duyck } 1287837566e7SAlexander Duyck 1288837566e7SAlexander Duyck __next_mem_range(idx, zone_nid, MEMBLOCK_NONE, 1289837566e7SAlexander Duyck &memblock.memory, &memblock.reserved, 1290837566e7SAlexander Duyck &spa, &epa, &nid); 1291837566e7SAlexander Duyck } 1292837566e7SAlexander Duyck 1293837566e7SAlexander Duyck /* signal end of iteration */ 1294837566e7SAlexander Duyck if (out_spfn) 1295837566e7SAlexander Duyck *out_spfn = ULONG_MAX; 1296837566e7SAlexander Duyck if (out_epfn) 1297837566e7SAlexander Duyck *out_epfn = 0; 1298837566e7SAlexander Duyck } 1299837566e7SAlexander Duyck 1300837566e7SAlexander Duyck #endif /* CONFIG_DEFERRED_STRUCT_PAGE_INIT */ 13017c0caeb8STejun Heo 130292d12f95SMike Rapoport /** 130392d12f95SMike Rapoport * memblock_alloc_range_nid - allocate boot memory block 130492d12f95SMike Rapoport * @size: size of memory block to be allocated in bytes 130592d12f95SMike Rapoport * @align: alignment of the region and block's size 130692d12f95SMike Rapoport * @start: the lower bound of the memory region to allocate (phys address) 130792d12f95SMike Rapoport * @end: the upper bound of the memory region to allocate (phys address) 130892d12f95SMike Rapoport * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 13090ac398b1SYunfeng Ye * @exact_nid: control the allocation fall back to other nodes 131092d12f95SMike Rapoport * 131192d12f95SMike Rapoport * The allocation is performed from memory region limited by 131295830666SCao jin * memblock.current_limit if @end == %MEMBLOCK_ALLOC_ACCESSIBLE. 131392d12f95SMike Rapoport * 13140ac398b1SYunfeng Ye * If the specified node can not hold the requested memory and @exact_nid 13150ac398b1SYunfeng Ye * is false, the allocation falls back to any node in the system. 131692d12f95SMike Rapoport * 131792d12f95SMike Rapoport * For systems with memory mirroring, the allocation is attempted first 131892d12f95SMike Rapoport * from the regions with mirroring enabled and then retried from any 131992d12f95SMike Rapoport * memory region. 132092d12f95SMike Rapoport * 132192d12f95SMike Rapoport * In addition, function sets the min_count to 0 using kmemleak_alloc_phys for 132292d12f95SMike Rapoport * allocated boot memory block, so that it is never reported as leaks. 132392d12f95SMike Rapoport * 132492d12f95SMike Rapoport * Return: 132592d12f95SMike Rapoport * Physical address of allocated memory block on success, %0 on failure. 132692d12f95SMike Rapoport */ 13278676af1fSAslan Bakirov phys_addr_t __init memblock_alloc_range_nid(phys_addr_t size, 13282bfc2862SAkinobu Mita phys_addr_t align, phys_addr_t start, 13290ac398b1SYunfeng Ye phys_addr_t end, int nid, 13300ac398b1SYunfeng Ye bool exact_nid) 133195f72d1eSYinghai Lu { 133292d12f95SMike Rapoport enum memblock_flags flags = choose_memblock_flags(); 13336ed311b2SBenjamin Herrenschmidt phys_addr_t found; 133495f72d1eSYinghai Lu 133592d12f95SMike Rapoport if (WARN_ONCE(nid == MAX_NUMNODES, "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n")) 133692d12f95SMike Rapoport nid = NUMA_NO_NODE; 133792d12f95SMike Rapoport 13382f770806SMike Rapoport if (!align) { 13392f770806SMike Rapoport /* Can't use WARNs this early in boot on powerpc */ 13402f770806SMike Rapoport dump_stack(); 13412f770806SMike Rapoport align = SMP_CACHE_BYTES; 13422f770806SMike Rapoport } 13432f770806SMike Rapoport 134492d12f95SMike Rapoport again: 1345fc6daaf9STony Luck found = memblock_find_in_range_node(size, align, start, end, nid, 1346fc6daaf9STony Luck flags); 134792d12f95SMike Rapoport if (found && !memblock_reserve(found, size)) 134892d12f95SMike Rapoport goto done; 134992d12f95SMike Rapoport 13500ac398b1SYunfeng Ye if (nid != NUMA_NO_NODE && !exact_nid) { 135192d12f95SMike Rapoport found = memblock_find_in_range_node(size, align, start, 135292d12f95SMike Rapoport end, NUMA_NO_NODE, 135392d12f95SMike Rapoport flags); 135492d12f95SMike Rapoport if (found && !memblock_reserve(found, size)) 135592d12f95SMike Rapoport goto done; 135692d12f95SMike Rapoport } 135792d12f95SMike Rapoport 135892d12f95SMike Rapoport if (flags & MEMBLOCK_MIRROR) { 135992d12f95SMike Rapoport flags &= ~MEMBLOCK_MIRROR; 136092d12f95SMike Rapoport pr_warn("Could not allocate %pap bytes of mirrored memory\n", 136192d12f95SMike Rapoport &size); 136292d12f95SMike Rapoport goto again; 136392d12f95SMike Rapoport } 136492d12f95SMike Rapoport 136592d12f95SMike Rapoport return 0; 136692d12f95SMike Rapoport 136792d12f95SMike Rapoport done: 136892d12f95SMike Rapoport /* Skip kmemleak for kasan_init() due to high volume. */ 136992d12f95SMike Rapoport if (end != MEMBLOCK_ALLOC_KASAN) 1370aedf95eaSCatalin Marinas /* 137192d12f95SMike Rapoport * The min_count is set to 0 so that memblock allocated 137292d12f95SMike Rapoport * blocks are never reported as leaks. This is because many 137392d12f95SMike Rapoport * of these blocks are only referred via the physical 137492d12f95SMike Rapoport * address which is not looked up by kmemleak. 1375aedf95eaSCatalin Marinas */ 13769099daedSCatalin Marinas kmemleak_alloc_phys(found, size, 0, 0); 137792d12f95SMike Rapoport 13786ed311b2SBenjamin Herrenschmidt return found; 1379aedf95eaSCatalin Marinas } 138095f72d1eSYinghai Lu 1381a2974133SMike Rapoport /** 1382a2974133SMike Rapoport * memblock_phys_alloc_range - allocate a memory block inside specified range 1383a2974133SMike Rapoport * @size: size of memory block to be allocated in bytes 1384a2974133SMike Rapoport * @align: alignment of the region and block's size 1385a2974133SMike Rapoport * @start: the lower bound of the memory region to allocate (physical address) 1386a2974133SMike Rapoport * @end: the upper bound of the memory region to allocate (physical address) 1387a2974133SMike Rapoport * 1388a2974133SMike Rapoport * Allocate @size bytes in the between @start and @end. 1389a2974133SMike Rapoport * 1390a2974133SMike Rapoport * Return: physical address of the allocated memory block on success, 1391a2974133SMike Rapoport * %0 on failure. 1392a2974133SMike Rapoport */ 13938a770c2aSMike Rapoport phys_addr_t __init memblock_phys_alloc_range(phys_addr_t size, 13948a770c2aSMike Rapoport phys_addr_t align, 13958a770c2aSMike Rapoport phys_addr_t start, 13968a770c2aSMike Rapoport phys_addr_t end) 13972bfc2862SAkinobu Mita { 1398b5cf2d6cSFaiyaz Mohammed memblock_dbg("%s: %llu bytes align=0x%llx from=%pa max_addr=%pa %pS\n", 1399b5cf2d6cSFaiyaz Mohammed __func__, (u64)size, (u64)align, &start, &end, 1400b5cf2d6cSFaiyaz Mohammed (void *)_RET_IP_); 14010ac398b1SYunfeng Ye return memblock_alloc_range_nid(size, align, start, end, NUMA_NO_NODE, 14020ac398b1SYunfeng Ye false); 14037bd0b0f0STejun Heo } 14047bd0b0f0STejun Heo 1405a2974133SMike Rapoport /** 140617cbe038SLevi Yun * memblock_phys_alloc_try_nid - allocate a memory block from specified NUMA node 1407a2974133SMike Rapoport * @size: size of memory block to be allocated in bytes 1408a2974133SMike Rapoport * @align: alignment of the region and block's size 1409a2974133SMike Rapoport * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 1410a2974133SMike Rapoport * 1411a2974133SMike Rapoport * Allocates memory block from the specified NUMA node. If the node 1412a2974133SMike Rapoport * has no available memory, attempts to allocated from any node in the 1413a2974133SMike Rapoport * system. 1414a2974133SMike Rapoport * 1415a2974133SMike Rapoport * Return: physical address of the allocated memory block on success, 1416a2974133SMike Rapoport * %0 on failure. 1417a2974133SMike Rapoport */ 14189a8dd708SMike Rapoport phys_addr_t __init memblock_phys_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid) 14199d1e2492SBenjamin Herrenschmidt { 142033755574SMike Rapoport return memblock_alloc_range_nid(size, align, 0, 14210ac398b1SYunfeng Ye MEMBLOCK_ALLOC_ACCESSIBLE, nid, false); 142295f72d1eSYinghai Lu } 142395f72d1eSYinghai Lu 142426f09e9bSSantosh Shilimkar /** 1425eb31d559SMike Rapoport * memblock_alloc_internal - allocate boot memory block 142626f09e9bSSantosh Shilimkar * @size: size of memory block to be allocated in bytes 142726f09e9bSSantosh Shilimkar * @align: alignment of the region and block's size 142826f09e9bSSantosh Shilimkar * @min_addr: the lower bound of the memory region to allocate (phys address) 142926f09e9bSSantosh Shilimkar * @max_addr: the upper bound of the memory region to allocate (phys address) 143026f09e9bSSantosh Shilimkar * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 14310ac398b1SYunfeng Ye * @exact_nid: control the allocation fall back to other nodes 143226f09e9bSSantosh Shilimkar * 143392d12f95SMike Rapoport * Allocates memory block using memblock_alloc_range_nid() and 143492d12f95SMike Rapoport * converts the returned physical address to virtual. 143592d12f95SMike Rapoport * 143626f09e9bSSantosh Shilimkar * The @min_addr limit is dropped if it can not be satisfied and the allocation 143792d12f95SMike Rapoport * will fall back to memory below @min_addr. Other constraints, such 143892d12f95SMike Rapoport * as node and mirrored memory will be handled again in 143992d12f95SMike Rapoport * memblock_alloc_range_nid(). 144026f09e9bSSantosh Shilimkar * 144147cec443SMike Rapoport * Return: 144226f09e9bSSantosh Shilimkar * Virtual address of allocated memory block on success, NULL on failure. 144326f09e9bSSantosh Shilimkar */ 1444eb31d559SMike Rapoport static void * __init memblock_alloc_internal( 144526f09e9bSSantosh Shilimkar phys_addr_t size, phys_addr_t align, 144626f09e9bSSantosh Shilimkar phys_addr_t min_addr, phys_addr_t max_addr, 14470ac398b1SYunfeng Ye int nid, bool exact_nid) 144826f09e9bSSantosh Shilimkar { 144926f09e9bSSantosh Shilimkar phys_addr_t alloc; 145026f09e9bSSantosh Shilimkar 145126f09e9bSSantosh Shilimkar /* 145226f09e9bSSantosh Shilimkar * Detect any accidental use of these APIs after slab is ready, as at 145326f09e9bSSantosh Shilimkar * this moment memblock may be deinitialized already and its 1454c6ffc5caSMike Rapoport * internal data may be destroyed (after execution of memblock_free_all) 145526f09e9bSSantosh Shilimkar */ 145626f09e9bSSantosh Shilimkar if (WARN_ON_ONCE(slab_is_available())) 145726f09e9bSSantosh Shilimkar return kzalloc_node(size, GFP_NOWAIT, nid); 145826f09e9bSSantosh Shilimkar 1459f3057ad7SMike Rapoport if (max_addr > memblock.current_limit) 1460f3057ad7SMike Rapoport max_addr = memblock.current_limit; 1461f3057ad7SMike Rapoport 14620ac398b1SYunfeng Ye alloc = memblock_alloc_range_nid(size, align, min_addr, max_addr, nid, 14630ac398b1SYunfeng Ye exact_nid); 14642f770806SMike Rapoport 146592d12f95SMike Rapoport /* retry allocation without lower limit */ 146692d12f95SMike Rapoport if (!alloc && min_addr) 14670ac398b1SYunfeng Ye alloc = memblock_alloc_range_nid(size, align, 0, max_addr, nid, 14680ac398b1SYunfeng Ye exact_nid); 146926f09e9bSSantosh Shilimkar 147092d12f95SMike Rapoport if (!alloc) 1471a3f5bafcSTony Luck return NULL; 147226f09e9bSSantosh Shilimkar 147392d12f95SMike Rapoport return phys_to_virt(alloc); 147426f09e9bSSantosh Shilimkar } 147526f09e9bSSantosh Shilimkar 147626f09e9bSSantosh Shilimkar /** 14770ac398b1SYunfeng Ye * memblock_alloc_exact_nid_raw - allocate boot memory block on the exact node 14780ac398b1SYunfeng Ye * without zeroing memory 14790ac398b1SYunfeng Ye * @size: size of memory block to be allocated in bytes 14800ac398b1SYunfeng Ye * @align: alignment of the region and block's size 14810ac398b1SYunfeng Ye * @min_addr: the lower bound of the memory region from where the allocation 14820ac398b1SYunfeng Ye * is preferred (phys address) 14830ac398b1SYunfeng Ye * @max_addr: the upper bound of the memory region from where the allocation 14840ac398b1SYunfeng Ye * is preferred (phys address), or %MEMBLOCK_ALLOC_ACCESSIBLE to 14850ac398b1SYunfeng Ye * allocate only from memory limited by memblock.current_limit value 14860ac398b1SYunfeng Ye * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 14870ac398b1SYunfeng Ye * 14880ac398b1SYunfeng Ye * Public function, provides additional debug information (including caller 14890ac398b1SYunfeng Ye * info), if enabled. Does not zero allocated memory. 14900ac398b1SYunfeng Ye * 14910ac398b1SYunfeng Ye * Return: 14920ac398b1SYunfeng Ye * Virtual address of allocated memory block on success, NULL on failure. 14930ac398b1SYunfeng Ye */ 14940ac398b1SYunfeng Ye void * __init memblock_alloc_exact_nid_raw( 14950ac398b1SYunfeng Ye phys_addr_t size, phys_addr_t align, 14960ac398b1SYunfeng Ye phys_addr_t min_addr, phys_addr_t max_addr, 14970ac398b1SYunfeng Ye int nid) 14980ac398b1SYunfeng Ye { 14990ac398b1SYunfeng Ye void *ptr; 15000ac398b1SYunfeng Ye 15010ac398b1SYunfeng Ye memblock_dbg("%s: %llu bytes align=0x%llx nid=%d from=%pa max_addr=%pa %pS\n", 15020ac398b1SYunfeng Ye __func__, (u64)size, (u64)align, nid, &min_addr, 15030ac398b1SYunfeng Ye &max_addr, (void *)_RET_IP_); 15040ac398b1SYunfeng Ye 15050ac398b1SYunfeng Ye ptr = memblock_alloc_internal(size, align, 15060ac398b1SYunfeng Ye min_addr, max_addr, nid, true); 15070ac398b1SYunfeng Ye if (ptr && size > 0) 15080ac398b1SYunfeng Ye page_init_poison(ptr, size); 15090ac398b1SYunfeng Ye 15100ac398b1SYunfeng Ye return ptr; 15110ac398b1SYunfeng Ye } 15120ac398b1SYunfeng Ye 15130ac398b1SYunfeng Ye /** 1514eb31d559SMike Rapoport * memblock_alloc_try_nid_raw - allocate boot memory block without zeroing 1515ea1f5f37SPavel Tatashin * memory and without panicking 1516ea1f5f37SPavel Tatashin * @size: size of memory block to be allocated in bytes 1517ea1f5f37SPavel Tatashin * @align: alignment of the region and block's size 1518ea1f5f37SPavel Tatashin * @min_addr: the lower bound of the memory region from where the allocation 1519ea1f5f37SPavel Tatashin * is preferred (phys address) 1520ea1f5f37SPavel Tatashin * @max_addr: the upper bound of the memory region from where the allocation 152197ad1087SMike Rapoport * is preferred (phys address), or %MEMBLOCK_ALLOC_ACCESSIBLE to 1522ea1f5f37SPavel Tatashin * allocate only from memory limited by memblock.current_limit value 1523ea1f5f37SPavel Tatashin * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 1524ea1f5f37SPavel Tatashin * 1525ea1f5f37SPavel Tatashin * Public function, provides additional debug information (including caller 1526ea1f5f37SPavel Tatashin * info), if enabled. Does not zero allocated memory, does not panic if request 1527ea1f5f37SPavel Tatashin * cannot be satisfied. 1528ea1f5f37SPavel Tatashin * 152947cec443SMike Rapoport * Return: 1530ea1f5f37SPavel Tatashin * Virtual address of allocated memory block on success, NULL on failure. 1531ea1f5f37SPavel Tatashin */ 1532eb31d559SMike Rapoport void * __init memblock_alloc_try_nid_raw( 1533ea1f5f37SPavel Tatashin phys_addr_t size, phys_addr_t align, 1534ea1f5f37SPavel Tatashin phys_addr_t min_addr, phys_addr_t max_addr, 1535ea1f5f37SPavel Tatashin int nid) 1536ea1f5f37SPavel Tatashin { 1537ea1f5f37SPavel Tatashin void *ptr; 1538ea1f5f37SPavel Tatashin 1539d75f773cSSakari Ailus memblock_dbg("%s: %llu bytes align=0x%llx nid=%d from=%pa max_addr=%pa %pS\n", 1540a36aab89SMike Rapoport __func__, (u64)size, (u64)align, nid, &min_addr, 1541a36aab89SMike Rapoport &max_addr, (void *)_RET_IP_); 1542ea1f5f37SPavel Tatashin 1543eb31d559SMike Rapoport ptr = memblock_alloc_internal(size, align, 15440ac398b1SYunfeng Ye min_addr, max_addr, nid, false); 1545ea1f5f37SPavel Tatashin if (ptr && size > 0) 1546f682a97aSAlexander Duyck page_init_poison(ptr, size); 1547f682a97aSAlexander Duyck 1548ea1f5f37SPavel Tatashin return ptr; 1549ea1f5f37SPavel Tatashin } 1550ea1f5f37SPavel Tatashin 1551ea1f5f37SPavel Tatashin /** 1552c0dbe825SMike Rapoport * memblock_alloc_try_nid - allocate boot memory block 155326f09e9bSSantosh Shilimkar * @size: size of memory block to be allocated in bytes 155426f09e9bSSantosh Shilimkar * @align: alignment of the region and block's size 155526f09e9bSSantosh Shilimkar * @min_addr: the lower bound of the memory region from where the allocation 155626f09e9bSSantosh Shilimkar * is preferred (phys address) 155726f09e9bSSantosh Shilimkar * @max_addr: the upper bound of the memory region from where the allocation 155897ad1087SMike Rapoport * is preferred (phys address), or %MEMBLOCK_ALLOC_ACCESSIBLE to 155926f09e9bSSantosh Shilimkar * allocate only from memory limited by memblock.current_limit value 156026f09e9bSSantosh Shilimkar * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 156126f09e9bSSantosh Shilimkar * 1562c0dbe825SMike Rapoport * Public function, provides additional debug information (including caller 1563c0dbe825SMike Rapoport * info), if enabled. This function zeroes the allocated memory. 156426f09e9bSSantosh Shilimkar * 156547cec443SMike Rapoport * Return: 156626f09e9bSSantosh Shilimkar * Virtual address of allocated memory block on success, NULL on failure. 156726f09e9bSSantosh Shilimkar */ 1568eb31d559SMike Rapoport void * __init memblock_alloc_try_nid( 156926f09e9bSSantosh Shilimkar phys_addr_t size, phys_addr_t align, 157026f09e9bSSantosh Shilimkar phys_addr_t min_addr, phys_addr_t max_addr, 157126f09e9bSSantosh Shilimkar int nid) 157226f09e9bSSantosh Shilimkar { 157326f09e9bSSantosh Shilimkar void *ptr; 157426f09e9bSSantosh Shilimkar 1575d75f773cSSakari Ailus memblock_dbg("%s: %llu bytes align=0x%llx nid=%d from=%pa max_addr=%pa %pS\n", 1576a36aab89SMike Rapoport __func__, (u64)size, (u64)align, nid, &min_addr, 1577a36aab89SMike Rapoport &max_addr, (void *)_RET_IP_); 1578eb31d559SMike Rapoport ptr = memblock_alloc_internal(size, align, 15790ac398b1SYunfeng Ye min_addr, max_addr, nid, false); 1580c0dbe825SMike Rapoport if (ptr) 1581ea1f5f37SPavel Tatashin memset(ptr, 0, size); 158226f09e9bSSantosh Shilimkar 1583c0dbe825SMike Rapoport return ptr; 158426f09e9bSSantosh Shilimkar } 158526f09e9bSSantosh Shilimkar 158626f09e9bSSantosh Shilimkar /** 1587a2974133SMike Rapoport * __memblock_free_late - free pages directly to buddy allocator 158848a833ccSMike Rapoport * @base: phys starting address of the boot memory block 158926f09e9bSSantosh Shilimkar * @size: size of the boot memory block in bytes 159026f09e9bSSantosh Shilimkar * 1591a2974133SMike Rapoport * This is only useful when the memblock allocator has already been torn 159226f09e9bSSantosh Shilimkar * down, but we are still initializing the system. Pages are released directly 1593a2974133SMike Rapoport * to the buddy allocator. 159426f09e9bSSantosh Shilimkar */ 159526f09e9bSSantosh Shilimkar void __init __memblock_free_late(phys_addr_t base, phys_addr_t size) 159626f09e9bSSantosh Shilimkar { 1597a36aab89SMike Rapoport phys_addr_t cursor, end; 159826f09e9bSSantosh Shilimkar 1599a36aab89SMike Rapoport end = base + size - 1; 1600d75f773cSSakari Ailus memblock_dbg("%s: [%pa-%pa] %pS\n", 1601a36aab89SMike Rapoport __func__, &base, &end, (void *)_RET_IP_); 16029099daedSCatalin Marinas kmemleak_free_part_phys(base, size); 160326f09e9bSSantosh Shilimkar cursor = PFN_UP(base); 160426f09e9bSSantosh Shilimkar end = PFN_DOWN(base + size); 160526f09e9bSSantosh Shilimkar 160626f09e9bSSantosh Shilimkar for (; cursor < end; cursor++) { 16077c2ee349SMike Rapoport memblock_free_pages(pfn_to_page(cursor), cursor, 0); 1608ca79b0c2SArun KS totalram_pages_inc(); 160926f09e9bSSantosh Shilimkar } 161026f09e9bSSantosh Shilimkar } 16119d1e2492SBenjamin Herrenschmidt 16129d1e2492SBenjamin Herrenschmidt /* 16139d1e2492SBenjamin Herrenschmidt * Remaining API functions 16149d1e2492SBenjamin Herrenschmidt */ 16159d1e2492SBenjamin Herrenschmidt 16161f1ffb8aSDavid Gibson phys_addr_t __init_memblock memblock_phys_mem_size(void) 161795f72d1eSYinghai Lu { 16181440c4e2STejun Heo return memblock.memory.total_size; 161995f72d1eSYinghai Lu } 162095f72d1eSYinghai Lu 16218907de5dSSrikar Dronamraju phys_addr_t __init_memblock memblock_reserved_size(void) 16228907de5dSSrikar Dronamraju { 16238907de5dSSrikar Dronamraju return memblock.reserved.total_size; 16248907de5dSSrikar Dronamraju } 16258907de5dSSrikar Dronamraju 16260a93ebefSSam Ravnborg /* lowest address */ 16270a93ebefSSam Ravnborg phys_addr_t __init_memblock memblock_start_of_DRAM(void) 16280a93ebefSSam Ravnborg { 16290a93ebefSSam Ravnborg return memblock.memory.regions[0].base; 16300a93ebefSSam Ravnborg } 16310a93ebefSSam Ravnborg 163210d06439SYinghai Lu phys_addr_t __init_memblock memblock_end_of_DRAM(void) 163395f72d1eSYinghai Lu { 163495f72d1eSYinghai Lu int idx = memblock.memory.cnt - 1; 163595f72d1eSYinghai Lu 1636e3239ff9SBenjamin Herrenschmidt return (memblock.memory.regions[idx].base + memblock.memory.regions[idx].size); 163795f72d1eSYinghai Lu } 163895f72d1eSYinghai Lu 1639a571d4ebSDennis Chen static phys_addr_t __init_memblock __find_max_addr(phys_addr_t limit) 164095f72d1eSYinghai Lu { 16411c4bc43dSStefan Agner phys_addr_t max_addr = PHYS_ADDR_MAX; 1642136199f0SEmil Medve struct memblock_region *r; 164395f72d1eSYinghai Lu 1644a571d4ebSDennis Chen /* 1645a571d4ebSDennis Chen * translate the memory @limit size into the max address within one of 1646a571d4ebSDennis Chen * the memory memblock regions, if the @limit exceeds the total size 16471c4bc43dSStefan Agner * of those regions, max_addr will keep original value PHYS_ADDR_MAX 1648a571d4ebSDennis Chen */ 1649cc6de168SMike Rapoport for_each_mem_region(r) { 1650c0ce8fefSTejun Heo if (limit <= r->size) { 1651c0ce8fefSTejun Heo max_addr = r->base + limit; 165295f72d1eSYinghai Lu break; 165395f72d1eSYinghai Lu } 1654c0ce8fefSTejun Heo limit -= r->size; 165595f72d1eSYinghai Lu } 1656c0ce8fefSTejun Heo 1657a571d4ebSDennis Chen return max_addr; 1658a571d4ebSDennis Chen } 1659a571d4ebSDennis Chen 1660a571d4ebSDennis Chen void __init memblock_enforce_memory_limit(phys_addr_t limit) 1661a571d4ebSDennis Chen { 166249aef717SColin Ian King phys_addr_t max_addr; 1663a571d4ebSDennis Chen 1664a571d4ebSDennis Chen if (!limit) 1665a571d4ebSDennis Chen return; 1666a571d4ebSDennis Chen 1667a571d4ebSDennis Chen max_addr = __find_max_addr(limit); 1668a571d4ebSDennis Chen 1669a571d4ebSDennis Chen /* @limit exceeds the total size of the memory, do nothing */ 16701c4bc43dSStefan Agner if (max_addr == PHYS_ADDR_MAX) 1671a571d4ebSDennis Chen return; 1672a571d4ebSDennis Chen 1673c0ce8fefSTejun Heo /* truncate both memory and reserved regions */ 1674f1af9d3aSPhilipp Hachtmann memblock_remove_range(&memblock.memory, max_addr, 16751c4bc43dSStefan Agner PHYS_ADDR_MAX); 1676f1af9d3aSPhilipp Hachtmann memblock_remove_range(&memblock.reserved, max_addr, 16771c4bc43dSStefan Agner PHYS_ADDR_MAX); 167895f72d1eSYinghai Lu } 167995f72d1eSYinghai Lu 1680c9ca9b4eSAKASHI Takahiro void __init memblock_cap_memory_range(phys_addr_t base, phys_addr_t size) 1681c9ca9b4eSAKASHI Takahiro { 1682c9ca9b4eSAKASHI Takahiro int start_rgn, end_rgn; 1683c9ca9b4eSAKASHI Takahiro int i, ret; 1684c9ca9b4eSAKASHI Takahiro 1685c9ca9b4eSAKASHI Takahiro if (!size) 1686c9ca9b4eSAKASHI Takahiro return; 1687c9ca9b4eSAKASHI Takahiro 1688*e888fa7bSGeert Uytterhoeven if (memblock.memory.cnt <= 1) { 1689*e888fa7bSGeert Uytterhoeven pr_warn("%s: No memory registered yet\n", __func__); 1690*e888fa7bSGeert Uytterhoeven return; 1691*e888fa7bSGeert Uytterhoeven } 1692*e888fa7bSGeert Uytterhoeven 1693c9ca9b4eSAKASHI Takahiro ret = memblock_isolate_range(&memblock.memory, base, size, 1694c9ca9b4eSAKASHI Takahiro &start_rgn, &end_rgn); 1695c9ca9b4eSAKASHI Takahiro if (ret) 1696c9ca9b4eSAKASHI Takahiro return; 1697c9ca9b4eSAKASHI Takahiro 1698c9ca9b4eSAKASHI Takahiro /* remove all the MAP regions */ 1699c9ca9b4eSAKASHI Takahiro for (i = memblock.memory.cnt - 1; i >= end_rgn; i--) 1700c9ca9b4eSAKASHI Takahiro if (!memblock_is_nomap(&memblock.memory.regions[i])) 1701c9ca9b4eSAKASHI Takahiro memblock_remove_region(&memblock.memory, i); 1702c9ca9b4eSAKASHI Takahiro 1703c9ca9b4eSAKASHI Takahiro for (i = start_rgn - 1; i >= 0; i--) 1704c9ca9b4eSAKASHI Takahiro if (!memblock_is_nomap(&memblock.memory.regions[i])) 1705c9ca9b4eSAKASHI Takahiro memblock_remove_region(&memblock.memory, i); 1706c9ca9b4eSAKASHI Takahiro 1707c9ca9b4eSAKASHI Takahiro /* truncate the reserved regions */ 1708c9ca9b4eSAKASHI Takahiro memblock_remove_range(&memblock.reserved, 0, base); 1709c9ca9b4eSAKASHI Takahiro memblock_remove_range(&memblock.reserved, 17101c4bc43dSStefan Agner base + size, PHYS_ADDR_MAX); 1711c9ca9b4eSAKASHI Takahiro } 1712c9ca9b4eSAKASHI Takahiro 1713a571d4ebSDennis Chen void __init memblock_mem_limit_remove_map(phys_addr_t limit) 1714a571d4ebSDennis Chen { 1715a571d4ebSDennis Chen phys_addr_t max_addr; 1716a571d4ebSDennis Chen 1717a571d4ebSDennis Chen if (!limit) 1718a571d4ebSDennis Chen return; 1719a571d4ebSDennis Chen 1720a571d4ebSDennis Chen max_addr = __find_max_addr(limit); 1721a571d4ebSDennis Chen 1722a571d4ebSDennis Chen /* @limit exceeds the total size of the memory, do nothing */ 17231c4bc43dSStefan Agner if (max_addr == PHYS_ADDR_MAX) 1724a571d4ebSDennis Chen return; 1725a571d4ebSDennis Chen 1726c9ca9b4eSAKASHI Takahiro memblock_cap_memory_range(0, max_addr); 1727a571d4ebSDennis Chen } 1728a571d4ebSDennis Chen 1729cd79481dSYinghai Lu static int __init_memblock memblock_search(struct memblock_type *type, phys_addr_t addr) 173072d4b0b4SBenjamin Herrenschmidt { 173172d4b0b4SBenjamin Herrenschmidt unsigned int left = 0, right = type->cnt; 173272d4b0b4SBenjamin Herrenschmidt 173372d4b0b4SBenjamin Herrenschmidt do { 173472d4b0b4SBenjamin Herrenschmidt unsigned int mid = (right + left) / 2; 173572d4b0b4SBenjamin Herrenschmidt 173672d4b0b4SBenjamin Herrenschmidt if (addr < type->regions[mid].base) 173772d4b0b4SBenjamin Herrenschmidt right = mid; 173872d4b0b4SBenjamin Herrenschmidt else if (addr >= (type->regions[mid].base + 173972d4b0b4SBenjamin Herrenschmidt type->regions[mid].size)) 174072d4b0b4SBenjamin Herrenschmidt left = mid + 1; 174172d4b0b4SBenjamin Herrenschmidt else 174272d4b0b4SBenjamin Herrenschmidt return mid; 174372d4b0b4SBenjamin Herrenschmidt } while (left < right); 174472d4b0b4SBenjamin Herrenschmidt return -1; 174572d4b0b4SBenjamin Herrenschmidt } 174672d4b0b4SBenjamin Herrenschmidt 1747f5a222dcSYueyi Li bool __init_memblock memblock_is_reserved(phys_addr_t addr) 174895f72d1eSYinghai Lu { 174972d4b0b4SBenjamin Herrenschmidt return memblock_search(&memblock.reserved, addr) != -1; 175095f72d1eSYinghai Lu } 175172d4b0b4SBenjamin Herrenschmidt 1752b4ad0c7eSYaowei Bai bool __init_memblock memblock_is_memory(phys_addr_t addr) 175372d4b0b4SBenjamin Herrenschmidt { 175472d4b0b4SBenjamin Herrenschmidt return memblock_search(&memblock.memory, addr) != -1; 175572d4b0b4SBenjamin Herrenschmidt } 175672d4b0b4SBenjamin Herrenschmidt 1757937f0c26SYaowei Bai bool __init_memblock memblock_is_map_memory(phys_addr_t addr) 1758bf3d3cc5SArd Biesheuvel { 1759bf3d3cc5SArd Biesheuvel int i = memblock_search(&memblock.memory, addr); 1760bf3d3cc5SArd Biesheuvel 1761bf3d3cc5SArd Biesheuvel if (i == -1) 1762bf3d3cc5SArd Biesheuvel return false; 1763bf3d3cc5SArd Biesheuvel return !memblock_is_nomap(&memblock.memory.regions[i]); 1764bf3d3cc5SArd Biesheuvel } 1765bf3d3cc5SArd Biesheuvel 1766e76b63f8SYinghai Lu int __init_memblock memblock_search_pfn_nid(unsigned long pfn, 1767e76b63f8SYinghai Lu unsigned long *start_pfn, unsigned long *end_pfn) 1768e76b63f8SYinghai Lu { 1769e76b63f8SYinghai Lu struct memblock_type *type = &memblock.memory; 177016763230SFabian Frederick int mid = memblock_search(type, PFN_PHYS(pfn)); 1771e76b63f8SYinghai Lu 1772e76b63f8SYinghai Lu if (mid == -1) 1773e76b63f8SYinghai Lu return -1; 1774e76b63f8SYinghai Lu 1775f7e2f7e8SFabian Frederick *start_pfn = PFN_DOWN(type->regions[mid].base); 1776f7e2f7e8SFabian Frederick *end_pfn = PFN_DOWN(type->regions[mid].base + type->regions[mid].size); 1777e76b63f8SYinghai Lu 1778d622abf7SMike Rapoport return memblock_get_region_node(&type->regions[mid]); 1779e76b63f8SYinghai Lu } 1780e76b63f8SYinghai Lu 1781eab30949SStephen Boyd /** 1782eab30949SStephen Boyd * memblock_is_region_memory - check if a region is a subset of memory 1783eab30949SStephen Boyd * @base: base of region to check 1784eab30949SStephen Boyd * @size: size of region to check 1785eab30949SStephen Boyd * 1786eab30949SStephen Boyd * Check if the region [@base, @base + @size) is a subset of a memory block. 1787eab30949SStephen Boyd * 178847cec443SMike Rapoport * Return: 1789eab30949SStephen Boyd * 0 if false, non-zero if true 1790eab30949SStephen Boyd */ 1791937f0c26SYaowei Bai bool __init_memblock memblock_is_region_memory(phys_addr_t base, phys_addr_t size) 179272d4b0b4SBenjamin Herrenschmidt { 1793abb65272STomi Valkeinen int idx = memblock_search(&memblock.memory, base); 1794eb18f1b5STejun Heo phys_addr_t end = base + memblock_cap_size(base, &size); 179572d4b0b4SBenjamin Herrenschmidt 179672d4b0b4SBenjamin Herrenschmidt if (idx == -1) 1797937f0c26SYaowei Bai return false; 1798ef415ef4SWei Yang return (memblock.memory.regions[idx].base + 1799eb18f1b5STejun Heo memblock.memory.regions[idx].size) >= end; 180095f72d1eSYinghai Lu } 180195f72d1eSYinghai Lu 1802eab30949SStephen Boyd /** 1803eab30949SStephen Boyd * memblock_is_region_reserved - check if a region intersects reserved memory 1804eab30949SStephen Boyd * @base: base of region to check 1805eab30949SStephen Boyd * @size: size of region to check 1806eab30949SStephen Boyd * 180747cec443SMike Rapoport * Check if the region [@base, @base + @size) intersects a reserved 180847cec443SMike Rapoport * memory block. 1809eab30949SStephen Boyd * 181047cec443SMike Rapoport * Return: 1811c5c5c9d1STang Chen * True if they intersect, false if not. 1812eab30949SStephen Boyd */ 1813c5c5c9d1STang Chen bool __init_memblock memblock_is_region_reserved(phys_addr_t base, phys_addr_t size) 181495f72d1eSYinghai Lu { 1815c5c5c9d1STang Chen return memblock_overlaps_region(&memblock.reserved, base, size); 181695f72d1eSYinghai Lu } 181795f72d1eSYinghai Lu 18186ede1fd3SYinghai Lu void __init_memblock memblock_trim_memory(phys_addr_t align) 18196ede1fd3SYinghai Lu { 18206ede1fd3SYinghai Lu phys_addr_t start, end, orig_start, orig_end; 1821136199f0SEmil Medve struct memblock_region *r; 18226ede1fd3SYinghai Lu 1823cc6de168SMike Rapoport for_each_mem_region(r) { 1824136199f0SEmil Medve orig_start = r->base; 1825136199f0SEmil Medve orig_end = r->base + r->size; 18266ede1fd3SYinghai Lu start = round_up(orig_start, align); 18276ede1fd3SYinghai Lu end = round_down(orig_end, align); 18286ede1fd3SYinghai Lu 18296ede1fd3SYinghai Lu if (start == orig_start && end == orig_end) 18306ede1fd3SYinghai Lu continue; 18316ede1fd3SYinghai Lu 18326ede1fd3SYinghai Lu if (start < end) { 1833136199f0SEmil Medve r->base = start; 1834136199f0SEmil Medve r->size = end - start; 18356ede1fd3SYinghai Lu } else { 1836136199f0SEmil Medve memblock_remove_region(&memblock.memory, 1837136199f0SEmil Medve r - memblock.memory.regions); 1838136199f0SEmil Medve r--; 18396ede1fd3SYinghai Lu } 18406ede1fd3SYinghai Lu } 18416ede1fd3SYinghai Lu } 1842e63075a3SBenjamin Herrenschmidt 18433661ca66SYinghai Lu void __init_memblock memblock_set_current_limit(phys_addr_t limit) 1844e63075a3SBenjamin Herrenschmidt { 1845e63075a3SBenjamin Herrenschmidt memblock.current_limit = limit; 1846e63075a3SBenjamin Herrenschmidt } 1847e63075a3SBenjamin Herrenschmidt 1848fec51014SLaura Abbott phys_addr_t __init_memblock memblock_get_current_limit(void) 1849fec51014SLaura Abbott { 1850fec51014SLaura Abbott return memblock.current_limit; 1851fec51014SLaura Abbott } 1852fec51014SLaura Abbott 18530262d9c8SHeiko Carstens static void __init_memblock memblock_dump(struct memblock_type *type) 18546ed311b2SBenjamin Herrenschmidt { 18555d63f81cSMiles Chen phys_addr_t base, end, size; 1856e1720feeSMike Rapoport enum memblock_flags flags; 18578c9c1701SAlexander Kuleshov int idx; 18588c9c1701SAlexander Kuleshov struct memblock_region *rgn; 18596ed311b2SBenjamin Herrenschmidt 18600262d9c8SHeiko Carstens pr_info(" %s.cnt = 0x%lx\n", type->name, type->cnt); 18616ed311b2SBenjamin Herrenschmidt 186266e8b438SGioh Kim for_each_memblock_type(idx, type, rgn) { 18637c0caeb8STejun Heo char nid_buf[32] = ""; 18646ed311b2SBenjamin Herrenschmidt 18657c0caeb8STejun Heo base = rgn->base; 18667c0caeb8STejun Heo size = rgn->size; 18675d63f81cSMiles Chen end = base + size - 1; 186866a20757STang Chen flags = rgn->flags; 1869a9ee6cf5SMike Rapoport #ifdef CONFIG_NUMA 18707c0caeb8STejun Heo if (memblock_get_region_node(rgn) != MAX_NUMNODES) 18717c0caeb8STejun Heo snprintf(nid_buf, sizeof(nid_buf), " on node %d", 18727c0caeb8STejun Heo memblock_get_region_node(rgn)); 18737c0caeb8STejun Heo #endif 1874e1720feeSMike Rapoport pr_info(" %s[%#x]\t[%pa-%pa], %pa bytes%s flags: %#x\n", 18750262d9c8SHeiko Carstens type->name, idx, &base, &end, &size, nid_buf, flags); 18766ed311b2SBenjamin Herrenschmidt } 18776ed311b2SBenjamin Herrenschmidt } 18786ed311b2SBenjamin Herrenschmidt 187987c55870SMike Rapoport static void __init_memblock __memblock_dump_all(void) 18806ed311b2SBenjamin Herrenschmidt { 18816ed311b2SBenjamin Herrenschmidt pr_info("MEMBLOCK configuration:\n"); 18825d63f81cSMiles Chen pr_info(" memory size = %pa reserved size = %pa\n", 18835d63f81cSMiles Chen &memblock.memory.total_size, 18845d63f81cSMiles Chen &memblock.reserved.total_size); 18856ed311b2SBenjamin Herrenschmidt 18860262d9c8SHeiko Carstens memblock_dump(&memblock.memory); 18870262d9c8SHeiko Carstens memblock_dump(&memblock.reserved); 1888409efd4cSHeiko Carstens #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP 188977649905SDavid Hildenbrand memblock_dump(&physmem); 1890409efd4cSHeiko Carstens #endif 18916ed311b2SBenjamin Herrenschmidt } 18926ed311b2SBenjamin Herrenschmidt 189387c55870SMike Rapoport void __init_memblock memblock_dump_all(void) 189487c55870SMike Rapoport { 189587c55870SMike Rapoport if (memblock_debug) 189687c55870SMike Rapoport __memblock_dump_all(); 189787c55870SMike Rapoport } 189887c55870SMike Rapoport 18991aadc056STejun Heo void __init memblock_allow_resize(void) 19006ed311b2SBenjamin Herrenschmidt { 1901142b45a7SBenjamin Herrenschmidt memblock_can_resize = 1; 19026ed311b2SBenjamin Herrenschmidt } 19036ed311b2SBenjamin Herrenschmidt 19046ed311b2SBenjamin Herrenschmidt static int __init early_memblock(char *p) 19056ed311b2SBenjamin Herrenschmidt { 19066ed311b2SBenjamin Herrenschmidt if (p && strstr(p, "debug")) 19076ed311b2SBenjamin Herrenschmidt memblock_debug = 1; 19086ed311b2SBenjamin Herrenschmidt return 0; 19096ed311b2SBenjamin Herrenschmidt } 19106ed311b2SBenjamin Herrenschmidt early_param("memblock", early_memblock); 19116ed311b2SBenjamin Herrenschmidt 19124f5b0c17SMike Rapoport static void __init free_memmap(unsigned long start_pfn, unsigned long end_pfn) 19134f5b0c17SMike Rapoport { 19144f5b0c17SMike Rapoport struct page *start_pg, *end_pg; 19154f5b0c17SMike Rapoport phys_addr_t pg, pgend; 19164f5b0c17SMike Rapoport 19174f5b0c17SMike Rapoport /* 19184f5b0c17SMike Rapoport * Convert start_pfn/end_pfn to a struct page pointer. 19194f5b0c17SMike Rapoport */ 19204f5b0c17SMike Rapoport start_pg = pfn_to_page(start_pfn - 1) + 1; 19214f5b0c17SMike Rapoport end_pg = pfn_to_page(end_pfn - 1) + 1; 19224f5b0c17SMike Rapoport 19234f5b0c17SMike Rapoport /* 19244f5b0c17SMike Rapoport * Convert to physical addresses, and round start upwards and end 19254f5b0c17SMike Rapoport * downwards. 19264f5b0c17SMike Rapoport */ 19274f5b0c17SMike Rapoport pg = PAGE_ALIGN(__pa(start_pg)); 19284f5b0c17SMike Rapoport pgend = __pa(end_pg) & PAGE_MASK; 19294f5b0c17SMike Rapoport 19304f5b0c17SMike Rapoport /* 19314f5b0c17SMike Rapoport * If there are free pages between these, free the section of the 19324f5b0c17SMike Rapoport * memmap array. 19334f5b0c17SMike Rapoport */ 19344f5b0c17SMike Rapoport if (pg < pgend) 19354f5b0c17SMike Rapoport memblock_free(pg, pgend - pg); 19364f5b0c17SMike Rapoport } 19374f5b0c17SMike Rapoport 19384f5b0c17SMike Rapoport /* 19394f5b0c17SMike Rapoport * The mem_map array can get very big. Free the unused area of the memory map. 19404f5b0c17SMike Rapoport */ 19414f5b0c17SMike Rapoport static void __init free_unused_memmap(void) 19424f5b0c17SMike Rapoport { 19434f5b0c17SMike Rapoport unsigned long start, end, prev_end = 0; 19444f5b0c17SMike Rapoport int i; 19454f5b0c17SMike Rapoport 19464f5b0c17SMike Rapoport if (!IS_ENABLED(CONFIG_HAVE_ARCH_PFN_VALID) || 19474f5b0c17SMike Rapoport IS_ENABLED(CONFIG_SPARSEMEM_VMEMMAP)) 19484f5b0c17SMike Rapoport return; 19494f5b0c17SMike Rapoport 19504f5b0c17SMike Rapoport /* 19514f5b0c17SMike Rapoport * This relies on each bank being in address order. 19524f5b0c17SMike Rapoport * The banks are sorted previously in bootmem_init(). 19534f5b0c17SMike Rapoport */ 19544f5b0c17SMike Rapoport for_each_mem_pfn_range(i, MAX_NUMNODES, &start, &end, NULL) { 19554f5b0c17SMike Rapoport #ifdef CONFIG_SPARSEMEM 19564f5b0c17SMike Rapoport /* 19574f5b0c17SMike Rapoport * Take care not to free memmap entries that don't exist 19584f5b0c17SMike Rapoport * due to SPARSEMEM sections which aren't present. 19594f5b0c17SMike Rapoport */ 19604f5b0c17SMike Rapoport start = min(start, ALIGN(prev_end, PAGES_PER_SECTION)); 19614f5b0c17SMike Rapoport #endif 19624f5b0c17SMike Rapoport /* 1963e2a86800SMike Rapoport * Align down here since many operations in VM subsystem 1964e2a86800SMike Rapoport * presume that there are no holes in the memory map inside 1965e2a86800SMike Rapoport * a pageblock 19664f5b0c17SMike Rapoport */ 1967e2a86800SMike Rapoport start = round_down(start, pageblock_nr_pages); 19684f5b0c17SMike Rapoport 19694f5b0c17SMike Rapoport /* 19704f5b0c17SMike Rapoport * If we had a previous bank, and there is a space 19714f5b0c17SMike Rapoport * between the current bank and the previous, free it. 19724f5b0c17SMike Rapoport */ 19734f5b0c17SMike Rapoport if (prev_end && prev_end < start) 19744f5b0c17SMike Rapoport free_memmap(prev_end, start); 19754f5b0c17SMike Rapoport 19764f5b0c17SMike Rapoport /* 1977e2a86800SMike Rapoport * Align up here since many operations in VM subsystem 1978e2a86800SMike Rapoport * presume that there are no holes in the memory map inside 1979e2a86800SMike Rapoport * a pageblock 19804f5b0c17SMike Rapoport */ 1981e2a86800SMike Rapoport prev_end = ALIGN(end, pageblock_nr_pages); 19824f5b0c17SMike Rapoport } 19834f5b0c17SMike Rapoport 19844f5b0c17SMike Rapoport #ifdef CONFIG_SPARSEMEM 1985f921f53eSMike Rapoport if (!IS_ALIGNED(prev_end, PAGES_PER_SECTION)) { 1986f921f53eSMike Rapoport prev_end = ALIGN(end, pageblock_nr_pages); 19874f5b0c17SMike Rapoport free_memmap(prev_end, ALIGN(prev_end, PAGES_PER_SECTION)); 1988f921f53eSMike Rapoport } 19894f5b0c17SMike Rapoport #endif 19904f5b0c17SMike Rapoport } 19914f5b0c17SMike Rapoport 1992bda49a81SMike Rapoport static void __init __free_pages_memory(unsigned long start, unsigned long end) 1993bda49a81SMike Rapoport { 1994bda49a81SMike Rapoport int order; 1995bda49a81SMike Rapoport 1996bda49a81SMike Rapoport while (start < end) { 1997bda49a81SMike Rapoport order = min(MAX_ORDER - 1UL, __ffs(start)); 1998bda49a81SMike Rapoport 1999bda49a81SMike Rapoport while (start + (1UL << order) > end) 2000bda49a81SMike Rapoport order--; 2001bda49a81SMike Rapoport 2002bda49a81SMike Rapoport memblock_free_pages(pfn_to_page(start), start, order); 2003bda49a81SMike Rapoport 2004bda49a81SMike Rapoport start += (1UL << order); 2005bda49a81SMike Rapoport } 2006bda49a81SMike Rapoport } 2007bda49a81SMike Rapoport 2008bda49a81SMike Rapoport static unsigned long __init __free_memory_core(phys_addr_t start, 2009bda49a81SMike Rapoport phys_addr_t end) 2010bda49a81SMike Rapoport { 2011bda49a81SMike Rapoport unsigned long start_pfn = PFN_UP(start); 2012bda49a81SMike Rapoport unsigned long end_pfn = min_t(unsigned long, 2013bda49a81SMike Rapoport PFN_DOWN(end), max_low_pfn); 2014bda49a81SMike Rapoport 2015bda49a81SMike Rapoport if (start_pfn >= end_pfn) 2016bda49a81SMike Rapoport return 0; 2017bda49a81SMike Rapoport 2018bda49a81SMike Rapoport __free_pages_memory(start_pfn, end_pfn); 2019bda49a81SMike Rapoport 2020bda49a81SMike Rapoport return end_pfn - start_pfn; 2021bda49a81SMike Rapoport } 2022bda49a81SMike Rapoport 20239092d4f7SMike Rapoport static void __init memmap_init_reserved_pages(void) 20249092d4f7SMike Rapoport { 20259092d4f7SMike Rapoport struct memblock_region *region; 20269092d4f7SMike Rapoport phys_addr_t start, end; 20279092d4f7SMike Rapoport u64 i; 20289092d4f7SMike Rapoport 20299092d4f7SMike Rapoport /* initialize struct pages for the reserved regions */ 20309092d4f7SMike Rapoport for_each_reserved_mem_range(i, &start, &end) 20319092d4f7SMike Rapoport reserve_bootmem_region(start, end); 20329092d4f7SMike Rapoport 20339092d4f7SMike Rapoport /* and also treat struct pages for the NOMAP regions as PageReserved */ 20349092d4f7SMike Rapoport for_each_mem_region(region) { 20359092d4f7SMike Rapoport if (memblock_is_nomap(region)) { 20369092d4f7SMike Rapoport start = region->base; 20379092d4f7SMike Rapoport end = start + region->size; 20389092d4f7SMike Rapoport reserve_bootmem_region(start, end); 20399092d4f7SMike Rapoport } 20409092d4f7SMike Rapoport } 20419092d4f7SMike Rapoport } 20429092d4f7SMike Rapoport 2043bda49a81SMike Rapoport static unsigned long __init free_low_memory_core_early(void) 2044bda49a81SMike Rapoport { 2045bda49a81SMike Rapoport unsigned long count = 0; 2046bda49a81SMike Rapoport phys_addr_t start, end; 2047bda49a81SMike Rapoport u64 i; 2048bda49a81SMike Rapoport 2049bda49a81SMike Rapoport memblock_clear_hotplug(0, -1); 2050bda49a81SMike Rapoport 20519092d4f7SMike Rapoport memmap_init_reserved_pages(); 2052bda49a81SMike Rapoport 2053bda49a81SMike Rapoport /* 2054bda49a81SMike Rapoport * We need to use NUMA_NO_NODE instead of NODE_DATA(0)->node_id 2055bda49a81SMike Rapoport * because in some case like Node0 doesn't have RAM installed 2056bda49a81SMike Rapoport * low ram will be on Node1 2057bda49a81SMike Rapoport */ 2058bda49a81SMike Rapoport for_each_free_mem_range(i, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, 2059bda49a81SMike Rapoport NULL) 2060bda49a81SMike Rapoport count += __free_memory_core(start, end); 2061bda49a81SMike Rapoport 2062bda49a81SMike Rapoport return count; 2063bda49a81SMike Rapoport } 2064bda49a81SMike Rapoport 2065bda49a81SMike Rapoport static int reset_managed_pages_done __initdata; 2066bda49a81SMike Rapoport 2067bda49a81SMike Rapoport void reset_node_managed_pages(pg_data_t *pgdat) 2068bda49a81SMike Rapoport { 2069bda49a81SMike Rapoport struct zone *z; 2070bda49a81SMike Rapoport 2071bda49a81SMike Rapoport for (z = pgdat->node_zones; z < pgdat->node_zones + MAX_NR_ZONES; z++) 20729705bea5SArun KS atomic_long_set(&z->managed_pages, 0); 2073bda49a81SMike Rapoport } 2074bda49a81SMike Rapoport 2075bda49a81SMike Rapoport void __init reset_all_zones_managed_pages(void) 2076bda49a81SMike Rapoport { 2077bda49a81SMike Rapoport struct pglist_data *pgdat; 2078bda49a81SMike Rapoport 2079bda49a81SMike Rapoport if (reset_managed_pages_done) 2080bda49a81SMike Rapoport return; 2081bda49a81SMike Rapoport 2082bda49a81SMike Rapoport for_each_online_pgdat(pgdat) 2083bda49a81SMike Rapoport reset_node_managed_pages(pgdat); 2084bda49a81SMike Rapoport 2085bda49a81SMike Rapoport reset_managed_pages_done = 1; 2086bda49a81SMike Rapoport } 2087bda49a81SMike Rapoport 2088bda49a81SMike Rapoport /** 2089bda49a81SMike Rapoport * memblock_free_all - release free pages to the buddy allocator 2090bda49a81SMike Rapoport */ 2091097d43d8SDaeseok Youn void __init memblock_free_all(void) 2092bda49a81SMike Rapoport { 2093bda49a81SMike Rapoport unsigned long pages; 2094bda49a81SMike Rapoport 20954f5b0c17SMike Rapoport free_unused_memmap(); 2096bda49a81SMike Rapoport reset_all_zones_managed_pages(); 2097bda49a81SMike Rapoport 2098bda49a81SMike Rapoport pages = free_low_memory_core_early(); 2099ca79b0c2SArun KS totalram_pages_add(pages); 2100bda49a81SMike Rapoport } 2101bda49a81SMike Rapoport 2102350e88baSMike Rapoport #if defined(CONFIG_DEBUG_FS) && defined(CONFIG_ARCH_KEEP_MEMBLOCK) 21036d03b885SBenjamin Herrenschmidt 21046d03b885SBenjamin Herrenschmidt static int memblock_debug_show(struct seq_file *m, void *private) 21056d03b885SBenjamin Herrenschmidt { 21066d03b885SBenjamin Herrenschmidt struct memblock_type *type = m->private; 21076d03b885SBenjamin Herrenschmidt struct memblock_region *reg; 21086d03b885SBenjamin Herrenschmidt int i; 21095d63f81cSMiles Chen phys_addr_t end; 21106d03b885SBenjamin Herrenschmidt 21116d03b885SBenjamin Herrenschmidt for (i = 0; i < type->cnt; i++) { 21126d03b885SBenjamin Herrenschmidt reg = &type->regions[i]; 21135d63f81cSMiles Chen end = reg->base + reg->size - 1; 21146d03b885SBenjamin Herrenschmidt 21155d63f81cSMiles Chen seq_printf(m, "%4d: ", i); 21165d63f81cSMiles Chen seq_printf(m, "%pa..%pa\n", ®->base, &end); 21176d03b885SBenjamin Herrenschmidt } 21186d03b885SBenjamin Herrenschmidt return 0; 21196d03b885SBenjamin Herrenschmidt } 21205ad35093SAndy Shevchenko DEFINE_SHOW_ATTRIBUTE(memblock_debug); 21216d03b885SBenjamin Herrenschmidt 21226d03b885SBenjamin Herrenschmidt static int __init memblock_init_debugfs(void) 21236d03b885SBenjamin Herrenschmidt { 21246d03b885SBenjamin Herrenschmidt struct dentry *root = debugfs_create_dir("memblock", NULL); 2125d9f7979cSGreg Kroah-Hartman 21260825a6f9SJoe Perches debugfs_create_file("memory", 0444, root, 21270825a6f9SJoe Perches &memblock.memory, &memblock_debug_fops); 21280825a6f9SJoe Perches debugfs_create_file("reserved", 0444, root, 21290825a6f9SJoe Perches &memblock.reserved, &memblock_debug_fops); 213070210ed9SPhilipp Hachtmann #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP 213177649905SDavid Hildenbrand debugfs_create_file("physmem", 0444, root, &physmem, 213277649905SDavid Hildenbrand &memblock_debug_fops); 213370210ed9SPhilipp Hachtmann #endif 21346d03b885SBenjamin Herrenschmidt 21356d03b885SBenjamin Herrenschmidt return 0; 21366d03b885SBenjamin Herrenschmidt } 21376d03b885SBenjamin Herrenschmidt __initcall(memblock_init_debugfs); 21386d03b885SBenjamin Herrenschmidt 21396d03b885SBenjamin Herrenschmidt #endif /* CONFIG_DEBUG_FS */ 2140