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 473e039c5cSMike Rapoport * * ``physmap`` - describes the actual physical memory regardless of 483e039c5cSMike Rapoport * the possible restrictions; the ``physmap`` type is only available 493e039c5cSMike Rapoport * on some architectures. 503e039c5cSMike Rapoport * 513e039c5cSMike Rapoport * Each region is represented by :c:type:`struct memblock_region` that 523e039c5cSMike Rapoport * defines the region extents, its attributes and NUMA node id on NUMA 533e039c5cSMike Rapoport * systems. Every memory type is described by the :c:type:`struct 543e039c5cSMike Rapoport * memblock_type` which contains an array of memory regions along with 553e039c5cSMike Rapoport * the allocator metadata. The memory types are nicely wrapped with 563e039c5cSMike Rapoport * :c:type:`struct memblock`. This structure is statically initialzed 573e039c5cSMike Rapoport * at build time. The region arrays for the "memory" and "reserved" 583e039c5cSMike Rapoport * types are initially sized to %INIT_MEMBLOCK_REGIONS and for the 593e039c5cSMike Rapoport * "physmap" type to %INIT_PHYSMEM_REGIONS. 606e5af9a8SCao jin * The memblock_allow_resize() enables automatic resizing of the region 616e5af9a8SCao jin * arrays during addition of new regions. This feature should be used 626e5af9a8SCao jin * with care so that memory allocated for the region array will not 636e5af9a8SCao jin * overlap with areas that should be reserved, for example initrd. 643e039c5cSMike Rapoport * 653e039c5cSMike Rapoport * The early architecture setup should tell memblock what the physical 666e5af9a8SCao jin * memory layout is by using memblock_add() or memblock_add_node() 676e5af9a8SCao jin * functions. The first function does not assign the region to a NUMA 686e5af9a8SCao jin * node and it is appropriate for UMA systems. Yet, it is possible to 696e5af9a8SCao jin * use it on NUMA systems as well and assign the region to a NUMA node 706e5af9a8SCao jin * later in the setup process using memblock_set_node(). The 716e5af9a8SCao jin * memblock_add_node() performs such an assignment directly. 723e039c5cSMike Rapoport * 73a2974133SMike Rapoport * Once memblock is setup the memory can be allocated using one of the 74a2974133SMike Rapoport * API variants: 75a2974133SMike Rapoport * 766e5af9a8SCao jin * * memblock_phys_alloc*() - these functions return the **physical** 776e5af9a8SCao jin * address of the allocated memory 786e5af9a8SCao jin * * memblock_alloc*() - these functions return the **virtual** address 796e5af9a8SCao jin * of the allocated memory. 80a2974133SMike Rapoport * 81a2974133SMike Rapoport * Note, that both API variants use implict assumptions about allowed 82a2974133SMike Rapoport * memory ranges and the fallback methods. Consult the documentation 836e5af9a8SCao jin * of memblock_alloc_internal() and memblock_alloc_range_nid() 846e5af9a8SCao jin * functions for more elaborate description. 853e039c5cSMike Rapoport * 866e5af9a8SCao jin * As the system boot progresses, the architecture specific mem_init() 876e5af9a8SCao jin * function frees all the memory to the buddy page allocator. 883e039c5cSMike Rapoport * 896e5af9a8SCao jin * Unless an architecture enables %CONFIG_ARCH_KEEP_MEMBLOCK, the 903e039c5cSMike Rapoport * memblock data structures will be discarded after the system 916e5af9a8SCao jin * initialization completes. 923e039c5cSMike Rapoport */ 933e039c5cSMike Rapoport 94bda49a81SMike Rapoport #ifndef CONFIG_NEED_MULTIPLE_NODES 95bda49a81SMike Rapoport struct pglist_data __refdata contig_page_data; 96bda49a81SMike Rapoport EXPORT_SYMBOL(contig_page_data); 97bda49a81SMike Rapoport #endif 98bda49a81SMike Rapoport 99bda49a81SMike Rapoport unsigned long max_low_pfn; 100bda49a81SMike Rapoport unsigned long min_low_pfn; 101bda49a81SMike Rapoport unsigned long max_pfn; 102bda49a81SMike Rapoport unsigned long long max_possible_pfn; 103bda49a81SMike Rapoport 104fe091c20STejun Heo static struct memblock_region memblock_memory_init_regions[INIT_MEMBLOCK_REGIONS] __initdata_memblock; 1058a5b403dSArd Biesheuvel static struct memblock_region memblock_reserved_init_regions[INIT_MEMBLOCK_RESERVED_REGIONS] __initdata_memblock; 10670210ed9SPhilipp Hachtmann #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP 10770210ed9SPhilipp Hachtmann static struct memblock_region memblock_physmem_init_regions[INIT_PHYSMEM_REGIONS] __initdata_memblock; 10870210ed9SPhilipp Hachtmann #endif 109fe091c20STejun Heo 110fe091c20STejun Heo struct memblock memblock __initdata_memblock = { 111fe091c20STejun Heo .memory.regions = memblock_memory_init_regions, 112fe091c20STejun Heo .memory.cnt = 1, /* empty dummy entry */ 113fe091c20STejun Heo .memory.max = INIT_MEMBLOCK_REGIONS, 1140262d9c8SHeiko Carstens .memory.name = "memory", 115fe091c20STejun Heo 116fe091c20STejun Heo .reserved.regions = memblock_reserved_init_regions, 117fe091c20STejun Heo .reserved.cnt = 1, /* empty dummy entry */ 1188a5b403dSArd Biesheuvel .reserved.max = INIT_MEMBLOCK_RESERVED_REGIONS, 1190262d9c8SHeiko Carstens .reserved.name = "reserved", 120fe091c20STejun Heo 12170210ed9SPhilipp Hachtmann #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP 12270210ed9SPhilipp Hachtmann .physmem.regions = memblock_physmem_init_regions, 12370210ed9SPhilipp Hachtmann .physmem.cnt = 1, /* empty dummy entry */ 12470210ed9SPhilipp Hachtmann .physmem.max = INIT_PHYSMEM_REGIONS, 1250262d9c8SHeiko Carstens .physmem.name = "physmem", 12670210ed9SPhilipp Hachtmann #endif 12770210ed9SPhilipp Hachtmann 12879442ed1STang Chen .bottom_up = false, 129fe091c20STejun Heo .current_limit = MEMBLOCK_ALLOC_ANYWHERE, 130fe091c20STejun Heo }; 13195f72d1eSYinghai Lu 13210d06439SYinghai Lu int memblock_debug __initdata_memblock; 133a3f5bafcSTony Luck static bool system_has_some_mirror __initdata_memblock = false; 1341aadc056STejun Heo static int memblock_can_resize __initdata_memblock; 135181eb394SGavin Shan static int memblock_memory_in_slab __initdata_memblock = 0; 136181eb394SGavin Shan static int memblock_reserved_in_slab __initdata_memblock = 0; 13795f72d1eSYinghai Lu 138c366ea89SMike Rapoport static enum memblock_flags __init_memblock choose_memblock_flags(void) 139a3f5bafcSTony Luck { 140a3f5bafcSTony Luck return system_has_some_mirror ? MEMBLOCK_MIRROR : MEMBLOCK_NONE; 141a3f5bafcSTony Luck } 142a3f5bafcSTony Luck 143eb18f1b5STejun Heo /* adjust *@size so that (@base + *@size) doesn't overflow, return new size */ 144eb18f1b5STejun Heo static inline phys_addr_t memblock_cap_size(phys_addr_t base, phys_addr_t *size) 145eb18f1b5STejun Heo { 1461c4bc43dSStefan Agner return *size = min(*size, PHYS_ADDR_MAX - base); 147eb18f1b5STejun Heo } 148eb18f1b5STejun Heo 1496ed311b2SBenjamin Herrenschmidt /* 1506ed311b2SBenjamin Herrenschmidt * Address comparison utilities 1516ed311b2SBenjamin Herrenschmidt */ 15210d06439SYinghai Lu static unsigned long __init_memblock memblock_addrs_overlap(phys_addr_t base1, phys_addr_t size1, 1532898cc4cSBenjamin Herrenschmidt phys_addr_t base2, phys_addr_t size2) 15495f72d1eSYinghai Lu { 15595f72d1eSYinghai Lu return ((base1 < (base2 + size2)) && (base2 < (base1 + size1))); 15695f72d1eSYinghai Lu } 15795f72d1eSYinghai Lu 15895cf82ecSTang Chen bool __init_memblock memblock_overlaps_region(struct memblock_type *type, 1592d7d3eb2SH Hartley Sweeten phys_addr_t base, phys_addr_t size) 1606ed311b2SBenjamin Herrenschmidt { 1616ed311b2SBenjamin Herrenschmidt unsigned long i; 1626ed311b2SBenjamin Herrenschmidt 163f14516fbSAlexander Kuleshov for (i = 0; i < type->cnt; i++) 164f14516fbSAlexander Kuleshov if (memblock_addrs_overlap(base, size, type->regions[i].base, 165f14516fbSAlexander Kuleshov type->regions[i].size)) 1666ed311b2SBenjamin Herrenschmidt break; 167c5c5c9d1STang Chen return i < type->cnt; 1686ed311b2SBenjamin Herrenschmidt } 1696ed311b2SBenjamin Herrenschmidt 17047cec443SMike Rapoport /** 17179442ed1STang Chen * __memblock_find_range_bottom_up - find free area utility in bottom-up 17279442ed1STang Chen * @start: start of candidate range 17347cec443SMike Rapoport * @end: end of candidate range, can be %MEMBLOCK_ALLOC_ANYWHERE or 17447cec443SMike Rapoport * %MEMBLOCK_ALLOC_ACCESSIBLE 17579442ed1STang Chen * @size: size of free area to find 17679442ed1STang Chen * @align: alignment of free area to find 177b1154233SGrygorii Strashko * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 178fc6daaf9STony Luck * @flags: pick from blocks based on memory attributes 17979442ed1STang Chen * 18079442ed1STang Chen * Utility called from memblock_find_in_range_node(), find free area bottom-up. 18179442ed1STang Chen * 18247cec443SMike Rapoport * Return: 18379442ed1STang Chen * Found address on success, 0 on failure. 18479442ed1STang Chen */ 18579442ed1STang Chen static phys_addr_t __init_memblock 18679442ed1STang Chen __memblock_find_range_bottom_up(phys_addr_t start, phys_addr_t end, 187fc6daaf9STony Luck phys_addr_t size, phys_addr_t align, int nid, 188e1720feeSMike Rapoport enum memblock_flags flags) 18979442ed1STang Chen { 19079442ed1STang Chen phys_addr_t this_start, this_end, cand; 19179442ed1STang Chen u64 i; 19279442ed1STang Chen 193fc6daaf9STony Luck for_each_free_mem_range(i, nid, flags, &this_start, &this_end, NULL) { 19479442ed1STang Chen this_start = clamp(this_start, start, end); 19579442ed1STang Chen this_end = clamp(this_end, start, end); 19679442ed1STang Chen 19779442ed1STang Chen cand = round_up(this_start, align); 19879442ed1STang Chen if (cand < this_end && this_end - cand >= size) 19979442ed1STang Chen return cand; 20079442ed1STang Chen } 20179442ed1STang Chen 20279442ed1STang Chen return 0; 20379442ed1STang Chen } 20479442ed1STang Chen 2057bd0b0f0STejun Heo /** 2061402899eSTang Chen * __memblock_find_range_top_down - find free area utility, in top-down 2071402899eSTang Chen * @start: start of candidate range 20847cec443SMike Rapoport * @end: end of candidate range, can be %MEMBLOCK_ALLOC_ANYWHERE or 20947cec443SMike Rapoport * %MEMBLOCK_ALLOC_ACCESSIBLE 2101402899eSTang Chen * @size: size of free area to find 2111402899eSTang Chen * @align: alignment of free area to find 212b1154233SGrygorii Strashko * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 213fc6daaf9STony Luck * @flags: pick from blocks based on memory attributes 2141402899eSTang Chen * 2151402899eSTang Chen * Utility called from memblock_find_in_range_node(), find free area top-down. 2161402899eSTang Chen * 21747cec443SMike Rapoport * Return: 21879442ed1STang Chen * Found address on success, 0 on failure. 2191402899eSTang Chen */ 2201402899eSTang Chen static phys_addr_t __init_memblock 2211402899eSTang Chen __memblock_find_range_top_down(phys_addr_t start, phys_addr_t end, 222fc6daaf9STony Luck phys_addr_t size, phys_addr_t align, int nid, 223e1720feeSMike Rapoport enum memblock_flags flags) 2241402899eSTang Chen { 2251402899eSTang Chen phys_addr_t this_start, this_end, cand; 2261402899eSTang Chen u64 i; 2271402899eSTang Chen 228fc6daaf9STony Luck for_each_free_mem_range_reverse(i, nid, flags, &this_start, &this_end, 229fc6daaf9STony Luck NULL) { 2301402899eSTang Chen this_start = clamp(this_start, start, end); 2311402899eSTang Chen this_end = clamp(this_end, start, end); 2321402899eSTang Chen 2331402899eSTang Chen if (this_end < size) 2341402899eSTang Chen continue; 2351402899eSTang Chen 2361402899eSTang Chen cand = round_down(this_end - size, align); 2371402899eSTang Chen if (cand >= this_start) 2381402899eSTang Chen return cand; 2391402899eSTang Chen } 2401402899eSTang Chen 2411402899eSTang Chen return 0; 2421402899eSTang Chen } 2431402899eSTang Chen 2441402899eSTang Chen /** 2457bd0b0f0STejun Heo * memblock_find_in_range_node - find free area in given range and node 2467bd0b0f0STejun Heo * @size: size of free area to find 2477bd0b0f0STejun Heo * @align: alignment of free area to find 24887029ee9SGrygorii Strashko * @start: start of candidate range 24947cec443SMike Rapoport * @end: end of candidate range, can be %MEMBLOCK_ALLOC_ANYWHERE or 25047cec443SMike Rapoport * %MEMBLOCK_ALLOC_ACCESSIBLE 251b1154233SGrygorii Strashko * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 252fc6daaf9STony Luck * @flags: pick from blocks based on memory attributes 2537bd0b0f0STejun Heo * 2547bd0b0f0STejun Heo * Find @size free area aligned to @align in the specified range and node. 2557bd0b0f0STejun Heo * 25679442ed1STang Chen * When allocation direction is bottom-up, the @start should be greater 25779442ed1STang Chen * than the end of the kernel image. Otherwise, it will be trimmed. The 25879442ed1STang Chen * reason is that we want the bottom-up allocation just near the kernel 25979442ed1STang Chen * image so it is highly likely that the allocated memory and the kernel 26079442ed1STang Chen * will reside in the same node. 26179442ed1STang Chen * 26279442ed1STang Chen * If bottom-up allocation failed, will try to allocate memory top-down. 26379442ed1STang Chen * 26447cec443SMike Rapoport * Return: 26579442ed1STang Chen * Found address on success, 0 on failure. 2666ed311b2SBenjamin Herrenschmidt */ 267c366ea89SMike Rapoport static phys_addr_t __init_memblock memblock_find_in_range_node(phys_addr_t size, 26887029ee9SGrygorii Strashko phys_addr_t align, phys_addr_t start, 269e1720feeSMike Rapoport phys_addr_t end, int nid, 270e1720feeSMike Rapoport enum memblock_flags flags) 271f7210e6cSTang Chen { 2720cfb8f0cSTang Chen phys_addr_t kernel_end, ret; 27379442ed1STang Chen 274f7210e6cSTang Chen /* pump up @end */ 275fed84c78SQian Cai if (end == MEMBLOCK_ALLOC_ACCESSIBLE || 276fed84c78SQian Cai end == MEMBLOCK_ALLOC_KASAN) 277f7210e6cSTang Chen end = memblock.current_limit; 278f7210e6cSTang Chen 279f7210e6cSTang Chen /* avoid allocating the first page */ 280f7210e6cSTang Chen start = max_t(phys_addr_t, start, PAGE_SIZE); 281f7210e6cSTang Chen end = max(start, end); 28279442ed1STang Chen kernel_end = __pa_symbol(_end); 28379442ed1STang Chen 28479442ed1STang Chen /* 28579442ed1STang Chen * try bottom-up allocation only when bottom-up mode 28679442ed1STang Chen * is set and @end is above the kernel image. 28779442ed1STang Chen */ 28879442ed1STang Chen if (memblock_bottom_up() && end > kernel_end) { 28979442ed1STang Chen phys_addr_t bottom_up_start; 29079442ed1STang Chen 29179442ed1STang Chen /* make sure we will allocate above the kernel */ 29279442ed1STang Chen bottom_up_start = max(start, kernel_end); 29379442ed1STang Chen 29479442ed1STang Chen /* ok, try bottom-up allocation first */ 29579442ed1STang Chen ret = __memblock_find_range_bottom_up(bottom_up_start, end, 296fc6daaf9STony Luck size, align, nid, flags); 29779442ed1STang Chen if (ret) 29879442ed1STang Chen return ret; 29979442ed1STang Chen 30079442ed1STang Chen /* 30179442ed1STang Chen * we always limit bottom-up allocation above the kernel, 30279442ed1STang Chen * but top-down allocation doesn't have the limit, so 30379442ed1STang Chen * retrying top-down allocation may succeed when bottom-up 30479442ed1STang Chen * allocation failed. 30579442ed1STang Chen * 30679442ed1STang Chen * bottom-up allocation is expected to be fail very rarely, 30779442ed1STang Chen * so we use WARN_ONCE() here to see the stack trace if 30879442ed1STang Chen * fail happens. 30979442ed1STang Chen */ 310e3d301caSMichal Hocko WARN_ONCE(IS_ENABLED(CONFIG_MEMORY_HOTREMOVE), 311e3d301caSMichal Hocko "memblock: bottom-up allocation failed, memory hotremove may be affected\n"); 31279442ed1STang Chen } 313f7210e6cSTang Chen 314fc6daaf9STony Luck return __memblock_find_range_top_down(start, end, size, align, nid, 315fc6daaf9STony Luck flags); 316f7210e6cSTang Chen } 3176ed311b2SBenjamin Herrenschmidt 3187bd0b0f0STejun Heo /** 3197bd0b0f0STejun Heo * memblock_find_in_range - find free area in given range 3207bd0b0f0STejun Heo * @start: start of candidate range 32147cec443SMike Rapoport * @end: end of candidate range, can be %MEMBLOCK_ALLOC_ANYWHERE or 32247cec443SMike Rapoport * %MEMBLOCK_ALLOC_ACCESSIBLE 3237bd0b0f0STejun Heo * @size: size of free area to find 3247bd0b0f0STejun Heo * @align: alignment of free area to find 3257bd0b0f0STejun Heo * 3267bd0b0f0STejun Heo * Find @size free area aligned to @align in the specified range. 3277bd0b0f0STejun Heo * 32847cec443SMike Rapoport * Return: 32979442ed1STang Chen * Found address on success, 0 on failure. 3307bd0b0f0STejun Heo */ 3317bd0b0f0STejun Heo phys_addr_t __init_memblock memblock_find_in_range(phys_addr_t start, 3327bd0b0f0STejun Heo phys_addr_t end, phys_addr_t size, 3337bd0b0f0STejun Heo phys_addr_t align) 3347bd0b0f0STejun Heo { 335a3f5bafcSTony Luck phys_addr_t ret; 336e1720feeSMike Rapoport enum memblock_flags flags = choose_memblock_flags(); 337a3f5bafcSTony Luck 338a3f5bafcSTony Luck again: 339a3f5bafcSTony Luck ret = memblock_find_in_range_node(size, align, start, end, 340a3f5bafcSTony Luck NUMA_NO_NODE, flags); 341a3f5bafcSTony Luck 342a3f5bafcSTony Luck if (!ret && (flags & MEMBLOCK_MIRROR)) { 343a3f5bafcSTony Luck pr_warn("Could not allocate %pap bytes of mirrored memory\n", 344a3f5bafcSTony Luck &size); 345a3f5bafcSTony Luck flags &= ~MEMBLOCK_MIRROR; 346a3f5bafcSTony Luck goto again; 347a3f5bafcSTony Luck } 348a3f5bafcSTony Luck 349a3f5bafcSTony Luck return ret; 3507bd0b0f0STejun Heo } 3517bd0b0f0STejun Heo 35210d06439SYinghai Lu static void __init_memblock memblock_remove_region(struct memblock_type *type, unsigned long r) 35395f72d1eSYinghai Lu { 3541440c4e2STejun Heo type->total_size -= type->regions[r].size; 3557c0caeb8STejun Heo memmove(&type->regions[r], &type->regions[r + 1], 3567c0caeb8STejun Heo (type->cnt - (r + 1)) * sizeof(type->regions[r])); 357e3239ff9SBenjamin Herrenschmidt type->cnt--; 35895f72d1eSYinghai Lu 3598f7a6605SBenjamin Herrenschmidt /* Special case for empty arrays */ 3608f7a6605SBenjamin Herrenschmidt if (type->cnt == 0) { 3611440c4e2STejun Heo WARN_ON(type->total_size != 0); 3628f7a6605SBenjamin Herrenschmidt type->cnt = 1; 3638f7a6605SBenjamin Herrenschmidt type->regions[0].base = 0; 3648f7a6605SBenjamin Herrenschmidt type->regions[0].size = 0; 36566a20757STang Chen type->regions[0].flags = 0; 3667c0caeb8STejun Heo memblock_set_region_node(&type->regions[0], MAX_NUMNODES); 3678f7a6605SBenjamin Herrenschmidt } 36895f72d1eSYinghai Lu } 36995f72d1eSYinghai Lu 370350e88baSMike Rapoport #ifndef CONFIG_ARCH_KEEP_MEMBLOCK 3713010f876SPavel Tatashin /** 37247cec443SMike Rapoport * memblock_discard - discard memory and reserved arrays if they were allocated 3733010f876SPavel Tatashin */ 3743010f876SPavel Tatashin void __init memblock_discard(void) 37529f67386SYinghai Lu { 3763010f876SPavel Tatashin phys_addr_t addr, size; 37729f67386SYinghai Lu 3783010f876SPavel Tatashin if (memblock.reserved.regions != memblock_reserved_init_regions) { 3793010f876SPavel Tatashin addr = __pa(memblock.reserved.regions); 3803010f876SPavel Tatashin size = PAGE_ALIGN(sizeof(struct memblock_region) * 38129f67386SYinghai Lu memblock.reserved.max); 3823010f876SPavel Tatashin __memblock_free_late(addr, size); 38329f67386SYinghai Lu } 38429f67386SYinghai Lu 38591b540f9SPavel Tatashin if (memblock.memory.regions != memblock_memory_init_regions) { 3863010f876SPavel Tatashin addr = __pa(memblock.memory.regions); 3873010f876SPavel Tatashin size = PAGE_ALIGN(sizeof(struct memblock_region) * 3885e270e25SPhilipp Hachtmann memblock.memory.max); 3893010f876SPavel Tatashin __memblock_free_late(addr, size); 3905e270e25SPhilipp Hachtmann } 3913010f876SPavel Tatashin } 3925e270e25SPhilipp Hachtmann #endif 3935e270e25SPhilipp Hachtmann 39448c3b583SGreg Pearson /** 39548c3b583SGreg Pearson * memblock_double_array - double the size of the memblock regions array 39648c3b583SGreg Pearson * @type: memblock type of the regions array being doubled 39748c3b583SGreg Pearson * @new_area_start: starting address of memory range to avoid overlap with 39848c3b583SGreg Pearson * @new_area_size: size of memory range to avoid overlap with 39948c3b583SGreg Pearson * 40048c3b583SGreg Pearson * Double the size of the @type regions array. If memblock is being used to 40148c3b583SGreg Pearson * allocate memory for a new reserved regions array and there is a previously 40248c3b583SGreg Pearson * allocated memory range [@new_area_start, @new_area_start + @new_area_size] 40348c3b583SGreg Pearson * waiting to be reserved, ensure the memory used by the new array does 40448c3b583SGreg Pearson * not overlap. 40548c3b583SGreg Pearson * 40647cec443SMike Rapoport * Return: 40748c3b583SGreg Pearson * 0 on success, -1 on failure. 40848c3b583SGreg Pearson */ 40948c3b583SGreg Pearson static int __init_memblock memblock_double_array(struct memblock_type *type, 41048c3b583SGreg Pearson phys_addr_t new_area_start, 41148c3b583SGreg Pearson phys_addr_t new_area_size) 412142b45a7SBenjamin Herrenschmidt { 413142b45a7SBenjamin Herrenschmidt struct memblock_region *new_array, *old_array; 41429f67386SYinghai Lu phys_addr_t old_alloc_size, new_alloc_size; 415a36aab89SMike Rapoport phys_addr_t old_size, new_size, addr, new_end; 416142b45a7SBenjamin Herrenschmidt int use_slab = slab_is_available(); 417181eb394SGavin Shan int *in_slab; 418142b45a7SBenjamin Herrenschmidt 419142b45a7SBenjamin Herrenschmidt /* We don't allow resizing until we know about the reserved regions 420142b45a7SBenjamin Herrenschmidt * of memory that aren't suitable for allocation 421142b45a7SBenjamin Herrenschmidt */ 422142b45a7SBenjamin Herrenschmidt if (!memblock_can_resize) 423142b45a7SBenjamin Herrenschmidt return -1; 424142b45a7SBenjamin Herrenschmidt 425142b45a7SBenjamin Herrenschmidt /* Calculate new doubled size */ 426142b45a7SBenjamin Herrenschmidt old_size = type->max * sizeof(struct memblock_region); 427142b45a7SBenjamin Herrenschmidt new_size = old_size << 1; 42829f67386SYinghai Lu /* 42929f67386SYinghai Lu * We need to allocated new one align to PAGE_SIZE, 43029f67386SYinghai Lu * so we can free them completely later. 43129f67386SYinghai Lu */ 43229f67386SYinghai Lu old_alloc_size = PAGE_ALIGN(old_size); 43329f67386SYinghai Lu new_alloc_size = PAGE_ALIGN(new_size); 434142b45a7SBenjamin Herrenschmidt 435181eb394SGavin Shan /* Retrieve the slab flag */ 436181eb394SGavin Shan if (type == &memblock.memory) 437181eb394SGavin Shan in_slab = &memblock_memory_in_slab; 438181eb394SGavin Shan else 439181eb394SGavin Shan in_slab = &memblock_reserved_in_slab; 440181eb394SGavin Shan 441a2974133SMike Rapoport /* Try to find some space for it */ 442142b45a7SBenjamin Herrenschmidt if (use_slab) { 443142b45a7SBenjamin Herrenschmidt new_array = kmalloc(new_size, GFP_KERNEL); 4441f5026a7STejun Heo addr = new_array ? __pa(new_array) : 0; 4454e2f0775SGavin Shan } else { 44648c3b583SGreg Pearson /* only exclude range when trying to double reserved.regions */ 44748c3b583SGreg Pearson if (type != &memblock.reserved) 44848c3b583SGreg Pearson new_area_start = new_area_size = 0; 44948c3b583SGreg Pearson 45048c3b583SGreg Pearson addr = memblock_find_in_range(new_area_start + new_area_size, 45148c3b583SGreg Pearson memblock.current_limit, 45229f67386SYinghai Lu new_alloc_size, PAGE_SIZE); 45348c3b583SGreg Pearson if (!addr && new_area_size) 45448c3b583SGreg Pearson addr = memblock_find_in_range(0, 45548c3b583SGreg Pearson min(new_area_start, memblock.current_limit), 45629f67386SYinghai Lu new_alloc_size, PAGE_SIZE); 45748c3b583SGreg Pearson 45815674868SSachin Kamat new_array = addr ? __va(addr) : NULL; 4594e2f0775SGavin Shan } 4601f5026a7STejun Heo if (!addr) { 461142b45a7SBenjamin Herrenschmidt pr_err("memblock: Failed to double %s array from %ld to %ld entries !\n", 4620262d9c8SHeiko Carstens type->name, type->max, type->max * 2); 463142b45a7SBenjamin Herrenschmidt return -1; 464142b45a7SBenjamin Herrenschmidt } 465142b45a7SBenjamin Herrenschmidt 466a36aab89SMike Rapoport new_end = addr + new_size - 1; 467a36aab89SMike Rapoport memblock_dbg("memblock: %s is doubled to %ld at [%pa-%pa]", 468a36aab89SMike Rapoport type->name, type->max * 2, &addr, &new_end); 469ea9e4376SYinghai Lu 470fd07383bSAndrew Morton /* 471fd07383bSAndrew Morton * Found space, we now need to move the array over before we add the 472fd07383bSAndrew Morton * reserved region since it may be our reserved array itself that is 473fd07383bSAndrew Morton * full. 474142b45a7SBenjamin Herrenschmidt */ 475142b45a7SBenjamin Herrenschmidt memcpy(new_array, type->regions, old_size); 476142b45a7SBenjamin Herrenschmidt memset(new_array + type->max, 0, old_size); 477142b45a7SBenjamin Herrenschmidt old_array = type->regions; 478142b45a7SBenjamin Herrenschmidt type->regions = new_array; 479142b45a7SBenjamin Herrenschmidt type->max <<= 1; 480142b45a7SBenjamin Herrenschmidt 481fd07383bSAndrew Morton /* Free old array. We needn't free it if the array is the static one */ 482181eb394SGavin Shan if (*in_slab) 483181eb394SGavin Shan kfree(old_array); 484181eb394SGavin Shan else if (old_array != memblock_memory_init_regions && 485142b45a7SBenjamin Herrenschmidt old_array != memblock_reserved_init_regions) 48629f67386SYinghai Lu memblock_free(__pa(old_array), old_alloc_size); 487142b45a7SBenjamin Herrenschmidt 488fd07383bSAndrew Morton /* 489fd07383bSAndrew Morton * Reserve the new array if that comes from the memblock. Otherwise, we 490fd07383bSAndrew Morton * needn't do it 491181eb394SGavin Shan */ 492181eb394SGavin Shan if (!use_slab) 49329f67386SYinghai Lu BUG_ON(memblock_reserve(addr, new_alloc_size)); 494181eb394SGavin Shan 495181eb394SGavin Shan /* Update slab flag */ 496181eb394SGavin Shan *in_slab = use_slab; 497181eb394SGavin Shan 498142b45a7SBenjamin Herrenschmidt return 0; 499142b45a7SBenjamin Herrenschmidt } 500142b45a7SBenjamin Herrenschmidt 501784656f9STejun Heo /** 502784656f9STejun Heo * memblock_merge_regions - merge neighboring compatible regions 503784656f9STejun Heo * @type: memblock type to scan 504784656f9STejun Heo * 505784656f9STejun Heo * Scan @type and merge neighboring compatible regions. 506784656f9STejun Heo */ 507784656f9STejun Heo static void __init_memblock memblock_merge_regions(struct memblock_type *type) 508784656f9STejun Heo { 509784656f9STejun Heo int i = 0; 510784656f9STejun Heo 511784656f9STejun Heo /* cnt never goes below 1 */ 512784656f9STejun Heo while (i < type->cnt - 1) { 513784656f9STejun Heo struct memblock_region *this = &type->regions[i]; 514784656f9STejun Heo struct memblock_region *next = &type->regions[i + 1]; 515784656f9STejun Heo 5167c0caeb8STejun Heo if (this->base + this->size != next->base || 5177c0caeb8STejun Heo memblock_get_region_node(this) != 51866a20757STang Chen memblock_get_region_node(next) || 51966a20757STang Chen this->flags != next->flags) { 520784656f9STejun Heo BUG_ON(this->base + this->size > next->base); 521784656f9STejun Heo i++; 522784656f9STejun Heo continue; 523784656f9STejun Heo } 524784656f9STejun Heo 525784656f9STejun Heo this->size += next->size; 526c0232ae8SLin Feng /* move forward from next + 1, index of which is i + 2 */ 527c0232ae8SLin Feng memmove(next, next + 1, (type->cnt - (i + 2)) * sizeof(*next)); 528784656f9STejun Heo type->cnt--; 529784656f9STejun Heo } 530784656f9STejun Heo } 531784656f9STejun Heo 532784656f9STejun Heo /** 533784656f9STejun Heo * memblock_insert_region - insert new memblock region 534784656f9STejun Heo * @type: memblock type to insert into 535784656f9STejun Heo * @idx: index for the insertion point 536784656f9STejun Heo * @base: base address of the new region 537784656f9STejun Heo * @size: size of the new region 538209ff86dSTang Chen * @nid: node id of the new region 53966a20757STang Chen * @flags: flags of the new region 540784656f9STejun Heo * 541784656f9STejun Heo * Insert new memblock region [@base, @base + @size) into @type at @idx. 542412d0008SAlexander Kuleshov * @type must already have extra room to accommodate the new region. 543784656f9STejun Heo */ 544784656f9STejun Heo static void __init_memblock memblock_insert_region(struct memblock_type *type, 545784656f9STejun Heo int idx, phys_addr_t base, 54666a20757STang Chen phys_addr_t size, 547e1720feeSMike Rapoport int nid, 548e1720feeSMike Rapoport enum memblock_flags flags) 549784656f9STejun Heo { 550784656f9STejun Heo struct memblock_region *rgn = &type->regions[idx]; 551784656f9STejun Heo 552784656f9STejun Heo BUG_ON(type->cnt >= type->max); 553784656f9STejun Heo memmove(rgn + 1, rgn, (type->cnt - idx) * sizeof(*rgn)); 554784656f9STejun Heo rgn->base = base; 555784656f9STejun Heo rgn->size = size; 55666a20757STang Chen rgn->flags = flags; 5577c0caeb8STejun Heo memblock_set_region_node(rgn, nid); 558784656f9STejun Heo type->cnt++; 5591440c4e2STejun Heo type->total_size += size; 560784656f9STejun Heo } 561784656f9STejun Heo 562784656f9STejun Heo /** 563f1af9d3aSPhilipp Hachtmann * memblock_add_range - add new memblock region 564784656f9STejun Heo * @type: memblock type to add new region into 565784656f9STejun Heo * @base: base address of the new region 566784656f9STejun Heo * @size: size of the new region 5677fb0bc3fSTejun Heo * @nid: nid of the new region 56866a20757STang Chen * @flags: flags of the new region 569784656f9STejun Heo * 570784656f9STejun Heo * Add new memblock region [@base, @base + @size) into @type. The new region 571784656f9STejun Heo * is allowed to overlap with existing ones - overlaps don't affect already 572784656f9STejun Heo * existing regions. @type is guaranteed to be minimal (all neighbouring 573784656f9STejun Heo * compatible regions are merged) after the addition. 574784656f9STejun Heo * 57547cec443SMike Rapoport * Return: 576784656f9STejun Heo * 0 on success, -errno on failure. 577784656f9STejun Heo */ 578f1af9d3aSPhilipp Hachtmann int __init_memblock memblock_add_range(struct memblock_type *type, 57966a20757STang Chen phys_addr_t base, phys_addr_t size, 580e1720feeSMike Rapoport int nid, enum memblock_flags flags) 58195f72d1eSYinghai Lu { 582784656f9STejun Heo bool insert = false; 583eb18f1b5STejun Heo phys_addr_t obase = base; 584eb18f1b5STejun Heo phys_addr_t end = base + memblock_cap_size(base, &size); 5858c9c1701SAlexander Kuleshov int idx, nr_new; 5868c9c1701SAlexander Kuleshov struct memblock_region *rgn; 58795f72d1eSYinghai Lu 588b3dc627cSTejun Heo if (!size) 589b3dc627cSTejun Heo return 0; 590b3dc627cSTejun Heo 591784656f9STejun Heo /* special case for empty array */ 592784656f9STejun Heo if (type->regions[0].size == 0) { 5931440c4e2STejun Heo WARN_ON(type->cnt != 1 || type->total_size); 594784656f9STejun Heo type->regions[0].base = base; 595784656f9STejun Heo type->regions[0].size = size; 59666a20757STang Chen type->regions[0].flags = flags; 5977fb0bc3fSTejun Heo memblock_set_region_node(&type->regions[0], nid); 5981440c4e2STejun Heo type->total_size = size; 599784656f9STejun Heo return 0; 600784656f9STejun Heo } 601784656f9STejun Heo repeat: 602784656f9STejun Heo /* 603784656f9STejun Heo * The following is executed twice. Once with %false @insert and 604784656f9STejun Heo * then with %true. The first counts the number of regions needed 605412d0008SAlexander Kuleshov * to accommodate the new area. The second actually inserts them. 606784656f9STejun Heo */ 607784656f9STejun Heo base = obase; 608784656f9STejun Heo nr_new = 0; 609784656f9STejun Heo 61066e8b438SGioh Kim for_each_memblock_type(idx, type, rgn) { 611784656f9STejun Heo phys_addr_t rbase = rgn->base; 612784656f9STejun Heo phys_addr_t rend = rbase + rgn->size; 6138f7a6605SBenjamin Herrenschmidt 614784656f9STejun Heo if (rbase >= end) 6158f7a6605SBenjamin Herrenschmidt break; 616784656f9STejun Heo if (rend <= base) 617784656f9STejun Heo continue; 618784656f9STejun Heo /* 619784656f9STejun Heo * @rgn overlaps. If it separates the lower part of new 620784656f9STejun Heo * area, insert that portion. 6218f7a6605SBenjamin Herrenschmidt */ 622784656f9STejun Heo if (rbase > base) { 623c0a29498SWei Yang #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP 624c0a29498SWei Yang WARN_ON(nid != memblock_get_region_node(rgn)); 625c0a29498SWei Yang #endif 6264fcab5f4SWei Yang WARN_ON(flags != rgn->flags); 627784656f9STejun Heo nr_new++; 628784656f9STejun Heo if (insert) 6298c9c1701SAlexander Kuleshov memblock_insert_region(type, idx++, base, 63066a20757STang Chen rbase - base, nid, 63166a20757STang Chen flags); 632784656f9STejun Heo } 633784656f9STejun Heo /* area below @rend is dealt with, forget about it */ 634784656f9STejun Heo base = min(rend, end); 6358f7a6605SBenjamin Herrenschmidt } 6368f7a6605SBenjamin Herrenschmidt 637784656f9STejun Heo /* insert the remaining portion */ 638784656f9STejun Heo if (base < end) { 639784656f9STejun Heo nr_new++; 640784656f9STejun Heo if (insert) 6418c9c1701SAlexander Kuleshov memblock_insert_region(type, idx, base, end - base, 64266a20757STang Chen nid, flags); 6438f7a6605SBenjamin Herrenschmidt } 6448f7a6605SBenjamin Herrenschmidt 645ef3cc4dbSnimisolo if (!nr_new) 646ef3cc4dbSnimisolo return 0; 647ef3cc4dbSnimisolo 648784656f9STejun Heo /* 649784656f9STejun Heo * If this was the first round, resize array and repeat for actual 650784656f9STejun Heo * insertions; otherwise, merge and return. 6518f7a6605SBenjamin Herrenschmidt */ 652784656f9STejun Heo if (!insert) { 653784656f9STejun Heo while (type->cnt + nr_new > type->max) 65448c3b583SGreg Pearson if (memblock_double_array(type, obase, size) < 0) 655784656f9STejun Heo return -ENOMEM; 656784656f9STejun Heo insert = true; 657784656f9STejun Heo goto repeat; 65895f72d1eSYinghai Lu } else { 659784656f9STejun Heo memblock_merge_regions(type); 66095f72d1eSYinghai Lu return 0; 66195f72d1eSYinghai Lu } 662784656f9STejun Heo } 66395f72d1eSYinghai Lu 66448a833ccSMike Rapoport /** 66548a833ccSMike Rapoport * memblock_add_node - add new memblock region within a NUMA node 66648a833ccSMike Rapoport * @base: base address of the new region 66748a833ccSMike Rapoport * @size: size of the new region 66848a833ccSMike Rapoport * @nid: nid of the new region 66948a833ccSMike Rapoport * 67048a833ccSMike Rapoport * Add new memblock region [@base, @base + @size) to the "memory" 67148a833ccSMike Rapoport * type. See memblock_add_range() description for mode details 67248a833ccSMike Rapoport * 67348a833ccSMike Rapoport * Return: 67448a833ccSMike Rapoport * 0 on success, -errno on failure. 67548a833ccSMike Rapoport */ 6767fb0bc3fSTejun Heo int __init_memblock memblock_add_node(phys_addr_t base, phys_addr_t size, 6777fb0bc3fSTejun Heo int nid) 6787fb0bc3fSTejun Heo { 679f1af9d3aSPhilipp Hachtmann return memblock_add_range(&memblock.memory, base, size, nid, 0); 6807fb0bc3fSTejun Heo } 6817fb0bc3fSTejun Heo 68248a833ccSMike Rapoport /** 68348a833ccSMike Rapoport * memblock_add - add new memblock region 68448a833ccSMike Rapoport * @base: base address of the new region 68548a833ccSMike Rapoport * @size: size of the new region 68648a833ccSMike Rapoport * 68748a833ccSMike Rapoport * Add new memblock region [@base, @base + @size) to the "memory" 68848a833ccSMike Rapoport * type. See memblock_add_range() description for mode details 68948a833ccSMike Rapoport * 69048a833ccSMike Rapoport * Return: 69148a833ccSMike Rapoport * 0 on success, -errno on failure. 69248a833ccSMike Rapoport */ 693f705ac4bSAlexander Kuleshov int __init_memblock memblock_add(phys_addr_t base, phys_addr_t size) 6946a4055bcSAlexander Kuleshov { 6955d63f81cSMiles Chen phys_addr_t end = base + size - 1; 6965d63f81cSMiles Chen 697d75f773cSSakari Ailus memblock_dbg("memblock_add: [%pa-%pa] %pS\n", 6985d63f81cSMiles Chen &base, &end, (void *)_RET_IP_); 6996a4055bcSAlexander Kuleshov 700f705ac4bSAlexander Kuleshov return memblock_add_range(&memblock.memory, base, size, MAX_NUMNODES, 0); 70195f72d1eSYinghai Lu } 70295f72d1eSYinghai Lu 7036a9ceb31STejun Heo /** 7046a9ceb31STejun Heo * memblock_isolate_range - isolate given range into disjoint memblocks 7056a9ceb31STejun Heo * @type: memblock type to isolate range for 7066a9ceb31STejun Heo * @base: base of range to isolate 7076a9ceb31STejun Heo * @size: size of range to isolate 7086a9ceb31STejun Heo * @start_rgn: out parameter for the start of isolated region 7096a9ceb31STejun Heo * @end_rgn: out parameter for the end of isolated region 7106a9ceb31STejun Heo * 7116a9ceb31STejun Heo * Walk @type and ensure that regions don't cross the boundaries defined by 7126a9ceb31STejun Heo * [@base, @base + @size). Crossing regions are split at the boundaries, 7136a9ceb31STejun Heo * which may create at most two more regions. The index of the first 7146a9ceb31STejun Heo * region inside the range is returned in *@start_rgn and end in *@end_rgn. 7156a9ceb31STejun Heo * 71647cec443SMike Rapoport * Return: 7176a9ceb31STejun Heo * 0 on success, -errno on failure. 7186a9ceb31STejun Heo */ 7196a9ceb31STejun Heo static int __init_memblock memblock_isolate_range(struct memblock_type *type, 7206a9ceb31STejun Heo phys_addr_t base, phys_addr_t size, 7216a9ceb31STejun Heo int *start_rgn, int *end_rgn) 7226a9ceb31STejun Heo { 723eb18f1b5STejun Heo phys_addr_t end = base + memblock_cap_size(base, &size); 7248c9c1701SAlexander Kuleshov int idx; 7258c9c1701SAlexander Kuleshov struct memblock_region *rgn; 7266a9ceb31STejun Heo 7276a9ceb31STejun Heo *start_rgn = *end_rgn = 0; 7286a9ceb31STejun Heo 729b3dc627cSTejun Heo if (!size) 730b3dc627cSTejun Heo return 0; 731b3dc627cSTejun Heo 7326a9ceb31STejun Heo /* we'll create at most two more regions */ 7336a9ceb31STejun Heo while (type->cnt + 2 > type->max) 73448c3b583SGreg Pearson if (memblock_double_array(type, base, size) < 0) 7356a9ceb31STejun Heo return -ENOMEM; 7366a9ceb31STejun Heo 73766e8b438SGioh Kim for_each_memblock_type(idx, type, rgn) { 7386a9ceb31STejun Heo phys_addr_t rbase = rgn->base; 7396a9ceb31STejun Heo phys_addr_t rend = rbase + rgn->size; 7406a9ceb31STejun Heo 7416a9ceb31STejun Heo if (rbase >= end) 7426a9ceb31STejun Heo break; 7436a9ceb31STejun Heo if (rend <= base) 7446a9ceb31STejun Heo continue; 7456a9ceb31STejun Heo 7466a9ceb31STejun Heo if (rbase < base) { 7476a9ceb31STejun Heo /* 7486a9ceb31STejun Heo * @rgn intersects from below. Split and continue 7496a9ceb31STejun Heo * to process the next region - the new top half. 7506a9ceb31STejun Heo */ 7516a9ceb31STejun Heo rgn->base = base; 7521440c4e2STejun Heo rgn->size -= base - rbase; 7531440c4e2STejun Heo type->total_size -= base - rbase; 7548c9c1701SAlexander Kuleshov memblock_insert_region(type, idx, rbase, base - rbase, 75566a20757STang Chen memblock_get_region_node(rgn), 75666a20757STang Chen rgn->flags); 7576a9ceb31STejun Heo } else if (rend > end) { 7586a9ceb31STejun Heo /* 7596a9ceb31STejun Heo * @rgn intersects from above. Split and redo the 7606a9ceb31STejun Heo * current region - the new bottom half. 7616a9ceb31STejun Heo */ 7626a9ceb31STejun Heo rgn->base = end; 7631440c4e2STejun Heo rgn->size -= end - rbase; 7641440c4e2STejun Heo type->total_size -= end - rbase; 7658c9c1701SAlexander Kuleshov memblock_insert_region(type, idx--, rbase, end - rbase, 76666a20757STang Chen memblock_get_region_node(rgn), 76766a20757STang Chen rgn->flags); 7686a9ceb31STejun Heo } else { 7696a9ceb31STejun Heo /* @rgn is fully contained, record it */ 7706a9ceb31STejun Heo if (!*end_rgn) 7718c9c1701SAlexander Kuleshov *start_rgn = idx; 7728c9c1701SAlexander Kuleshov *end_rgn = idx + 1; 7736a9ceb31STejun Heo } 7746a9ceb31STejun Heo } 7756a9ceb31STejun Heo 7766a9ceb31STejun Heo return 0; 7776a9ceb31STejun Heo } 7786a9ceb31STejun Heo 77935bd16a2SAlexander Kuleshov static int __init_memblock memblock_remove_range(struct memblock_type *type, 7808f7a6605SBenjamin Herrenschmidt phys_addr_t base, phys_addr_t size) 78195f72d1eSYinghai Lu { 78271936180STejun Heo int start_rgn, end_rgn; 78371936180STejun Heo int i, ret; 78495f72d1eSYinghai Lu 78571936180STejun Heo ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); 78671936180STejun Heo if (ret) 78771936180STejun Heo return ret; 78895f72d1eSYinghai Lu 78971936180STejun Heo for (i = end_rgn - 1; i >= start_rgn; i--) 79071936180STejun Heo memblock_remove_region(type, i); 79195f72d1eSYinghai Lu return 0; 79295f72d1eSYinghai Lu } 79395f72d1eSYinghai Lu 794581adcbeSTejun Heo int __init_memblock memblock_remove(phys_addr_t base, phys_addr_t size) 79595f72d1eSYinghai Lu { 79625cf23d7SMinchan Kim phys_addr_t end = base + size - 1; 79725cf23d7SMinchan Kim 79825cf23d7SMinchan Kim memblock_dbg("memblock_remove: [%pa-%pa] %pS\n", 79925cf23d7SMinchan Kim &base, &end, (void *)_RET_IP_); 80025cf23d7SMinchan Kim 801f1af9d3aSPhilipp Hachtmann return memblock_remove_range(&memblock.memory, base, size); 80295f72d1eSYinghai Lu } 80395f72d1eSYinghai Lu 8044d72868cSMike Rapoport /** 8054d72868cSMike Rapoport * memblock_free - free boot memory block 8064d72868cSMike Rapoport * @base: phys starting address of the boot memory block 8074d72868cSMike Rapoport * @size: size of the boot memory block in bytes 8084d72868cSMike Rapoport * 8094d72868cSMike Rapoport * Free boot memory block previously allocated by memblock_alloc_xx() API. 8104d72868cSMike Rapoport * The freeing memory will not be released to the buddy allocator. 8114d72868cSMike Rapoport */ 812581adcbeSTejun Heo int __init_memblock memblock_free(phys_addr_t base, phys_addr_t size) 81395f72d1eSYinghai Lu { 8145d63f81cSMiles Chen phys_addr_t end = base + size - 1; 8155d63f81cSMiles Chen 816d75f773cSSakari Ailus memblock_dbg(" memblock_free: [%pa-%pa] %pS\n", 8175d63f81cSMiles Chen &base, &end, (void *)_RET_IP_); 81824aa0788STejun Heo 8199099daedSCatalin Marinas kmemleak_free_part_phys(base, size); 820f1af9d3aSPhilipp Hachtmann return memblock_remove_range(&memblock.reserved, base, size); 82195f72d1eSYinghai Lu } 82295f72d1eSYinghai Lu 823f705ac4bSAlexander Kuleshov int __init_memblock memblock_reserve(phys_addr_t base, phys_addr_t size) 82495f72d1eSYinghai Lu { 8255d63f81cSMiles Chen phys_addr_t end = base + size - 1; 8265d63f81cSMiles Chen 827d75f773cSSakari Ailus memblock_dbg("memblock_reserve: [%pa-%pa] %pS\n", 8285d63f81cSMiles Chen &base, &end, (void *)_RET_IP_); 82995f72d1eSYinghai Lu 830f705ac4bSAlexander Kuleshov return memblock_add_range(&memblock.reserved, base, size, MAX_NUMNODES, 0); 83195f72d1eSYinghai Lu } 83295f72d1eSYinghai Lu 83335fd0808STejun Heo /** 83447cec443SMike Rapoport * memblock_setclr_flag - set or clear flag for a memory region 83547cec443SMike Rapoport * @base: base address of the region 83647cec443SMike Rapoport * @size: size of the region 83747cec443SMike Rapoport * @set: set or clear the flag 83847cec443SMike Rapoport * @flag: the flag to udpate 83966b16edfSTang Chen * 8404308ce17STony Luck * This function isolates region [@base, @base + @size), and sets/clears flag 84166b16edfSTang Chen * 84247cec443SMike Rapoport * Return: 0 on success, -errno on failure. 84366b16edfSTang Chen */ 8444308ce17STony Luck static int __init_memblock memblock_setclr_flag(phys_addr_t base, 8454308ce17STony Luck phys_addr_t size, int set, int flag) 84666b16edfSTang Chen { 84766b16edfSTang Chen struct memblock_type *type = &memblock.memory; 84866b16edfSTang Chen int i, ret, start_rgn, end_rgn; 84966b16edfSTang Chen 85066b16edfSTang Chen ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); 85166b16edfSTang Chen if (ret) 85266b16edfSTang Chen return ret; 85366b16edfSTang Chen 854fe145124SMike Rapoport for (i = start_rgn; i < end_rgn; i++) { 855fe145124SMike Rapoport struct memblock_region *r = &type->regions[i]; 856fe145124SMike Rapoport 8574308ce17STony Luck if (set) 858fe145124SMike Rapoport r->flags |= flag; 8594308ce17STony Luck else 860fe145124SMike Rapoport r->flags &= ~flag; 861fe145124SMike Rapoport } 86266b16edfSTang Chen 86366b16edfSTang Chen memblock_merge_regions(type); 86466b16edfSTang Chen return 0; 86566b16edfSTang Chen } 86666b16edfSTang Chen 86766b16edfSTang Chen /** 8684308ce17STony Luck * memblock_mark_hotplug - Mark hotpluggable memory with flag MEMBLOCK_HOTPLUG. 8694308ce17STony Luck * @base: the base phys addr of the region 8704308ce17STony Luck * @size: the size of the region 8714308ce17STony Luck * 87247cec443SMike Rapoport * Return: 0 on success, -errno on failure. 8734308ce17STony Luck */ 8744308ce17STony Luck int __init_memblock memblock_mark_hotplug(phys_addr_t base, phys_addr_t size) 8754308ce17STony Luck { 8764308ce17STony Luck return memblock_setclr_flag(base, size, 1, MEMBLOCK_HOTPLUG); 8774308ce17STony Luck } 8784308ce17STony Luck 8794308ce17STony Luck /** 88066b16edfSTang Chen * memblock_clear_hotplug - Clear flag MEMBLOCK_HOTPLUG for a specified region. 88166b16edfSTang Chen * @base: the base phys addr of the region 88266b16edfSTang Chen * @size: the size of the region 88366b16edfSTang Chen * 88447cec443SMike Rapoport * Return: 0 on success, -errno on failure. 88566b16edfSTang Chen */ 88666b16edfSTang Chen int __init_memblock memblock_clear_hotplug(phys_addr_t base, phys_addr_t size) 88766b16edfSTang Chen { 8884308ce17STony Luck return memblock_setclr_flag(base, size, 0, MEMBLOCK_HOTPLUG); 88966b16edfSTang Chen } 89066b16edfSTang Chen 89166b16edfSTang Chen /** 892a3f5bafcSTony Luck * memblock_mark_mirror - Mark mirrored memory with flag MEMBLOCK_MIRROR. 893a3f5bafcSTony Luck * @base: the base phys addr of the region 894a3f5bafcSTony Luck * @size: the size of the region 895a3f5bafcSTony Luck * 89647cec443SMike Rapoport * Return: 0 on success, -errno on failure. 897a3f5bafcSTony Luck */ 898a3f5bafcSTony Luck int __init_memblock memblock_mark_mirror(phys_addr_t base, phys_addr_t size) 899a3f5bafcSTony Luck { 900a3f5bafcSTony Luck system_has_some_mirror = true; 901a3f5bafcSTony Luck 902a3f5bafcSTony Luck return memblock_setclr_flag(base, size, 1, MEMBLOCK_MIRROR); 903a3f5bafcSTony Luck } 904a3f5bafcSTony Luck 905bf3d3cc5SArd Biesheuvel /** 906bf3d3cc5SArd Biesheuvel * memblock_mark_nomap - Mark a memory region with flag MEMBLOCK_NOMAP. 907bf3d3cc5SArd Biesheuvel * @base: the base phys addr of the region 908bf3d3cc5SArd Biesheuvel * @size: the size of the region 909bf3d3cc5SArd Biesheuvel * 91047cec443SMike Rapoport * Return: 0 on success, -errno on failure. 911bf3d3cc5SArd Biesheuvel */ 912bf3d3cc5SArd Biesheuvel int __init_memblock memblock_mark_nomap(phys_addr_t base, phys_addr_t size) 913bf3d3cc5SArd Biesheuvel { 914bf3d3cc5SArd Biesheuvel return memblock_setclr_flag(base, size, 1, MEMBLOCK_NOMAP); 915bf3d3cc5SArd Biesheuvel } 916a3f5bafcSTony Luck 917a3f5bafcSTony Luck /** 9184c546b8aSAKASHI Takahiro * memblock_clear_nomap - Clear flag MEMBLOCK_NOMAP for a specified region. 9194c546b8aSAKASHI Takahiro * @base: the base phys addr of the region 9204c546b8aSAKASHI Takahiro * @size: the size of the region 9214c546b8aSAKASHI Takahiro * 92247cec443SMike Rapoport * Return: 0 on success, -errno on failure. 9234c546b8aSAKASHI Takahiro */ 9244c546b8aSAKASHI Takahiro int __init_memblock memblock_clear_nomap(phys_addr_t base, phys_addr_t size) 9254c546b8aSAKASHI Takahiro { 9264c546b8aSAKASHI Takahiro return memblock_setclr_flag(base, size, 0, MEMBLOCK_NOMAP); 9274c546b8aSAKASHI Takahiro } 9284c546b8aSAKASHI Takahiro 9294c546b8aSAKASHI Takahiro /** 9308e7a7f86SRobin Holt * __next_reserved_mem_region - next function for for_each_reserved_region() 9318e7a7f86SRobin Holt * @idx: pointer to u64 loop variable 9328e7a7f86SRobin Holt * @out_start: ptr to phys_addr_t for start address of the region, can be %NULL 9338e7a7f86SRobin Holt * @out_end: ptr to phys_addr_t for end address of the region, can be %NULL 9348e7a7f86SRobin Holt * 9358e7a7f86SRobin Holt * Iterate over all reserved memory regions. 9368e7a7f86SRobin Holt */ 9378e7a7f86SRobin Holt void __init_memblock __next_reserved_mem_region(u64 *idx, 9388e7a7f86SRobin Holt phys_addr_t *out_start, 9398e7a7f86SRobin Holt phys_addr_t *out_end) 9408e7a7f86SRobin Holt { 941567d117bSAlexander Kuleshov struct memblock_type *type = &memblock.reserved; 9428e7a7f86SRobin Holt 943cd33a76bSRichard Leitner if (*idx < type->cnt) { 944567d117bSAlexander Kuleshov struct memblock_region *r = &type->regions[*idx]; 9458e7a7f86SRobin Holt phys_addr_t base = r->base; 9468e7a7f86SRobin Holt phys_addr_t size = r->size; 9478e7a7f86SRobin Holt 9488e7a7f86SRobin Holt if (out_start) 9498e7a7f86SRobin Holt *out_start = base; 9508e7a7f86SRobin Holt if (out_end) 9518e7a7f86SRobin Holt *out_end = base + size - 1; 9528e7a7f86SRobin Holt 9538e7a7f86SRobin Holt *idx += 1; 9548e7a7f86SRobin Holt return; 9558e7a7f86SRobin Holt } 9568e7a7f86SRobin Holt 9578e7a7f86SRobin Holt /* signal end of iteration */ 9588e7a7f86SRobin Holt *idx = ULLONG_MAX; 9598e7a7f86SRobin Holt } 9608e7a7f86SRobin Holt 961c9a688a3SMike Rapoport static bool should_skip_region(struct memblock_region *m, int nid, int flags) 962c9a688a3SMike Rapoport { 963c9a688a3SMike Rapoport int m_nid = memblock_get_region_node(m); 964c9a688a3SMike Rapoport 965c9a688a3SMike Rapoport /* only memory regions are associated with nodes, check it */ 966c9a688a3SMike Rapoport if (nid != NUMA_NO_NODE && nid != m_nid) 967c9a688a3SMike Rapoport return true; 968c9a688a3SMike Rapoport 969c9a688a3SMike Rapoport /* skip hotpluggable memory regions if needed */ 970c9a688a3SMike Rapoport if (movable_node_is_enabled() && memblock_is_hotpluggable(m)) 971c9a688a3SMike Rapoport return true; 972c9a688a3SMike Rapoport 973c9a688a3SMike Rapoport /* if we want mirror memory skip non-mirror memory regions */ 974c9a688a3SMike Rapoport if ((flags & MEMBLOCK_MIRROR) && !memblock_is_mirror(m)) 975c9a688a3SMike Rapoport return true; 976c9a688a3SMike Rapoport 977c9a688a3SMike Rapoport /* skip nomap memory unless we were asked for it explicitly */ 978c9a688a3SMike Rapoport if (!(flags & MEMBLOCK_NOMAP) && memblock_is_nomap(m)) 979c9a688a3SMike Rapoport return true; 980c9a688a3SMike Rapoport 981c9a688a3SMike Rapoport return false; 982c9a688a3SMike Rapoport } 983c9a688a3SMike Rapoport 9848e7a7f86SRobin Holt /** 985a2974133SMike Rapoport * __next_mem_range - next function for for_each_free_mem_range() etc. 98635fd0808STejun Heo * @idx: pointer to u64 loop variable 987b1154233SGrygorii Strashko * @nid: node selector, %NUMA_NO_NODE for all nodes 988fc6daaf9STony Luck * @flags: pick from blocks based on memory attributes 989f1af9d3aSPhilipp Hachtmann * @type_a: pointer to memblock_type from where the range is taken 990f1af9d3aSPhilipp Hachtmann * @type_b: pointer to memblock_type which excludes memory from being taken 991dad7557eSWanpeng Li * @out_start: ptr to phys_addr_t for start address of the range, can be %NULL 992dad7557eSWanpeng Li * @out_end: ptr to phys_addr_t for end address of the range, can be %NULL 993dad7557eSWanpeng Li * @out_nid: ptr to int for nid of the range, can be %NULL 99435fd0808STejun Heo * 995f1af9d3aSPhilipp Hachtmann * Find the first area from *@idx which matches @nid, fill the out 99635fd0808STejun Heo * parameters, and update *@idx for the next iteration. The lower 32bit of 997f1af9d3aSPhilipp Hachtmann * *@idx contains index into type_a and the upper 32bit indexes the 998f1af9d3aSPhilipp Hachtmann * areas before each region in type_b. For example, if type_b regions 99935fd0808STejun Heo * look like the following, 100035fd0808STejun Heo * 100135fd0808STejun Heo * 0:[0-16), 1:[32-48), 2:[128-130) 100235fd0808STejun Heo * 100335fd0808STejun Heo * The upper 32bit indexes the following regions. 100435fd0808STejun Heo * 100535fd0808STejun Heo * 0:[0-0), 1:[16-32), 2:[48-128), 3:[130-MAX) 100635fd0808STejun Heo * 100735fd0808STejun Heo * As both region arrays are sorted, the function advances the two indices 100835fd0808STejun Heo * in lockstep and returns each intersection. 100935fd0808STejun Heo */ 1010e1720feeSMike Rapoport void __init_memblock __next_mem_range(u64 *idx, int nid, 1011e1720feeSMike Rapoport enum memblock_flags flags, 1012f1af9d3aSPhilipp Hachtmann struct memblock_type *type_a, 1013f1af9d3aSPhilipp Hachtmann struct memblock_type *type_b, 101435fd0808STejun Heo phys_addr_t *out_start, 101535fd0808STejun Heo phys_addr_t *out_end, int *out_nid) 101635fd0808STejun Heo { 1017f1af9d3aSPhilipp Hachtmann int idx_a = *idx & 0xffffffff; 1018f1af9d3aSPhilipp Hachtmann int idx_b = *idx >> 32; 1019b1154233SGrygorii Strashko 1020f1af9d3aSPhilipp Hachtmann if (WARN_ONCE(nid == MAX_NUMNODES, 1021f1af9d3aSPhilipp Hachtmann "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n")) 1022560dca27SGrygorii Strashko nid = NUMA_NO_NODE; 102335fd0808STejun Heo 1024f1af9d3aSPhilipp Hachtmann for (; idx_a < type_a->cnt; idx_a++) { 1025f1af9d3aSPhilipp Hachtmann struct memblock_region *m = &type_a->regions[idx_a]; 1026f1af9d3aSPhilipp Hachtmann 102735fd0808STejun Heo phys_addr_t m_start = m->base; 102835fd0808STejun Heo phys_addr_t m_end = m->base + m->size; 1029f1af9d3aSPhilipp Hachtmann int m_nid = memblock_get_region_node(m); 103035fd0808STejun Heo 1031c9a688a3SMike Rapoport if (should_skip_region(m, nid, flags)) 1032bf3d3cc5SArd Biesheuvel continue; 1033bf3d3cc5SArd Biesheuvel 1034f1af9d3aSPhilipp Hachtmann if (!type_b) { 1035f1af9d3aSPhilipp Hachtmann if (out_start) 1036f1af9d3aSPhilipp Hachtmann *out_start = m_start; 1037f1af9d3aSPhilipp Hachtmann if (out_end) 1038f1af9d3aSPhilipp Hachtmann *out_end = m_end; 1039f1af9d3aSPhilipp Hachtmann if (out_nid) 1040f1af9d3aSPhilipp Hachtmann *out_nid = m_nid; 1041f1af9d3aSPhilipp Hachtmann idx_a++; 1042f1af9d3aSPhilipp Hachtmann *idx = (u32)idx_a | (u64)idx_b << 32; 1043f1af9d3aSPhilipp Hachtmann return; 1044f1af9d3aSPhilipp Hachtmann } 104535fd0808STejun Heo 1046f1af9d3aSPhilipp Hachtmann /* scan areas before each reservation */ 1047f1af9d3aSPhilipp Hachtmann for (; idx_b < type_b->cnt + 1; idx_b++) { 1048f1af9d3aSPhilipp Hachtmann struct memblock_region *r; 1049f1af9d3aSPhilipp Hachtmann phys_addr_t r_start; 1050f1af9d3aSPhilipp Hachtmann phys_addr_t r_end; 1051f1af9d3aSPhilipp Hachtmann 1052f1af9d3aSPhilipp Hachtmann r = &type_b->regions[idx_b]; 1053f1af9d3aSPhilipp Hachtmann r_start = idx_b ? r[-1].base + r[-1].size : 0; 1054f1af9d3aSPhilipp Hachtmann r_end = idx_b < type_b->cnt ? 10551c4bc43dSStefan Agner r->base : PHYS_ADDR_MAX; 1056f1af9d3aSPhilipp Hachtmann 1057f1af9d3aSPhilipp Hachtmann /* 1058f1af9d3aSPhilipp Hachtmann * if idx_b advanced past idx_a, 1059f1af9d3aSPhilipp Hachtmann * break out to advance idx_a 1060f1af9d3aSPhilipp Hachtmann */ 106135fd0808STejun Heo if (r_start >= m_end) 106235fd0808STejun Heo break; 106335fd0808STejun Heo /* if the two regions intersect, we're done */ 106435fd0808STejun Heo if (m_start < r_end) { 106535fd0808STejun Heo if (out_start) 1066f1af9d3aSPhilipp Hachtmann *out_start = 1067f1af9d3aSPhilipp Hachtmann max(m_start, r_start); 106835fd0808STejun Heo if (out_end) 106935fd0808STejun Heo *out_end = min(m_end, r_end); 107035fd0808STejun Heo if (out_nid) 1071f1af9d3aSPhilipp Hachtmann *out_nid = m_nid; 107235fd0808STejun Heo /* 1073f1af9d3aSPhilipp Hachtmann * The region which ends first is 1074f1af9d3aSPhilipp Hachtmann * advanced for the next iteration. 107535fd0808STejun Heo */ 107635fd0808STejun Heo if (m_end <= r_end) 1077f1af9d3aSPhilipp Hachtmann idx_a++; 107835fd0808STejun Heo else 1079f1af9d3aSPhilipp Hachtmann idx_b++; 1080f1af9d3aSPhilipp Hachtmann *idx = (u32)idx_a | (u64)idx_b << 32; 108135fd0808STejun Heo return; 108235fd0808STejun Heo } 108335fd0808STejun Heo } 108435fd0808STejun Heo } 108535fd0808STejun Heo 108635fd0808STejun Heo /* signal end of iteration */ 108735fd0808STejun Heo *idx = ULLONG_MAX; 108835fd0808STejun Heo } 108935fd0808STejun Heo 10907bd0b0f0STejun Heo /** 1091f1af9d3aSPhilipp Hachtmann * __next_mem_range_rev - generic next function for for_each_*_range_rev() 1092f1af9d3aSPhilipp Hachtmann * 10937bd0b0f0STejun Heo * @idx: pointer to u64 loop variable 1094ad5ea8cdSAlexander Kuleshov * @nid: node selector, %NUMA_NO_NODE for all nodes 1095fc6daaf9STony Luck * @flags: pick from blocks based on memory attributes 1096f1af9d3aSPhilipp Hachtmann * @type_a: pointer to memblock_type from where the range is taken 1097f1af9d3aSPhilipp Hachtmann * @type_b: pointer to memblock_type which excludes memory from being taken 1098dad7557eSWanpeng Li * @out_start: ptr to phys_addr_t for start address of the range, can be %NULL 1099dad7557eSWanpeng Li * @out_end: ptr to phys_addr_t for end address of the range, can be %NULL 1100dad7557eSWanpeng Li * @out_nid: ptr to int for nid of the range, can be %NULL 11017bd0b0f0STejun Heo * 110247cec443SMike Rapoport * Finds the next range from type_a which is not marked as unsuitable 110347cec443SMike Rapoport * in type_b. 110447cec443SMike Rapoport * 1105f1af9d3aSPhilipp Hachtmann * Reverse of __next_mem_range(). 11067bd0b0f0STejun Heo */ 1107e1720feeSMike Rapoport void __init_memblock __next_mem_range_rev(u64 *idx, int nid, 1108e1720feeSMike Rapoport enum memblock_flags flags, 1109f1af9d3aSPhilipp Hachtmann struct memblock_type *type_a, 1110f1af9d3aSPhilipp Hachtmann struct memblock_type *type_b, 11117bd0b0f0STejun Heo phys_addr_t *out_start, 11127bd0b0f0STejun Heo phys_addr_t *out_end, int *out_nid) 11137bd0b0f0STejun Heo { 1114f1af9d3aSPhilipp Hachtmann int idx_a = *idx & 0xffffffff; 1115f1af9d3aSPhilipp Hachtmann int idx_b = *idx >> 32; 1116b1154233SGrygorii Strashko 1117560dca27SGrygorii Strashko if (WARN_ONCE(nid == MAX_NUMNODES, "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n")) 1118560dca27SGrygorii Strashko nid = NUMA_NO_NODE; 11197bd0b0f0STejun Heo 11207bd0b0f0STejun Heo if (*idx == (u64)ULLONG_MAX) { 1121f1af9d3aSPhilipp Hachtmann idx_a = type_a->cnt - 1; 1122e47608abSzijun_hu if (type_b != NULL) 1123f1af9d3aSPhilipp Hachtmann idx_b = type_b->cnt; 1124e47608abSzijun_hu else 1125e47608abSzijun_hu idx_b = 0; 11267bd0b0f0STejun Heo } 11277bd0b0f0STejun Heo 1128f1af9d3aSPhilipp Hachtmann for (; idx_a >= 0; idx_a--) { 1129f1af9d3aSPhilipp Hachtmann struct memblock_region *m = &type_a->regions[idx_a]; 1130f1af9d3aSPhilipp Hachtmann 11317bd0b0f0STejun Heo phys_addr_t m_start = m->base; 11327bd0b0f0STejun Heo phys_addr_t m_end = m->base + m->size; 1133f1af9d3aSPhilipp Hachtmann int m_nid = memblock_get_region_node(m); 11347bd0b0f0STejun Heo 1135c9a688a3SMike Rapoport if (should_skip_region(m, nid, flags)) 1136bf3d3cc5SArd Biesheuvel continue; 1137bf3d3cc5SArd Biesheuvel 1138f1af9d3aSPhilipp Hachtmann if (!type_b) { 1139f1af9d3aSPhilipp Hachtmann if (out_start) 1140f1af9d3aSPhilipp Hachtmann *out_start = m_start; 1141f1af9d3aSPhilipp Hachtmann if (out_end) 1142f1af9d3aSPhilipp Hachtmann *out_end = m_end; 1143f1af9d3aSPhilipp Hachtmann if (out_nid) 1144f1af9d3aSPhilipp Hachtmann *out_nid = m_nid; 1145fb399b48Szijun_hu idx_a--; 1146f1af9d3aSPhilipp Hachtmann *idx = (u32)idx_a | (u64)idx_b << 32; 1147f1af9d3aSPhilipp Hachtmann return; 1148f1af9d3aSPhilipp Hachtmann } 11497bd0b0f0STejun Heo 1150f1af9d3aSPhilipp Hachtmann /* scan areas before each reservation */ 1151f1af9d3aSPhilipp Hachtmann for (; idx_b >= 0; idx_b--) { 1152f1af9d3aSPhilipp Hachtmann struct memblock_region *r; 1153f1af9d3aSPhilipp Hachtmann phys_addr_t r_start; 1154f1af9d3aSPhilipp Hachtmann phys_addr_t r_end; 1155f1af9d3aSPhilipp Hachtmann 1156f1af9d3aSPhilipp Hachtmann r = &type_b->regions[idx_b]; 1157f1af9d3aSPhilipp Hachtmann r_start = idx_b ? r[-1].base + r[-1].size : 0; 1158f1af9d3aSPhilipp Hachtmann r_end = idx_b < type_b->cnt ? 11591c4bc43dSStefan Agner r->base : PHYS_ADDR_MAX; 1160f1af9d3aSPhilipp Hachtmann /* 1161f1af9d3aSPhilipp Hachtmann * if idx_b advanced past idx_a, 1162f1af9d3aSPhilipp Hachtmann * break out to advance idx_a 1163f1af9d3aSPhilipp Hachtmann */ 1164f1af9d3aSPhilipp Hachtmann 11657bd0b0f0STejun Heo if (r_end <= m_start) 11667bd0b0f0STejun Heo break; 11677bd0b0f0STejun Heo /* if the two regions intersect, we're done */ 11687bd0b0f0STejun Heo if (m_end > r_start) { 11697bd0b0f0STejun Heo if (out_start) 11707bd0b0f0STejun Heo *out_start = max(m_start, r_start); 11717bd0b0f0STejun Heo if (out_end) 11727bd0b0f0STejun Heo *out_end = min(m_end, r_end); 11737bd0b0f0STejun Heo if (out_nid) 1174f1af9d3aSPhilipp Hachtmann *out_nid = m_nid; 11757bd0b0f0STejun Heo if (m_start >= r_start) 1176f1af9d3aSPhilipp Hachtmann idx_a--; 11777bd0b0f0STejun Heo else 1178f1af9d3aSPhilipp Hachtmann idx_b--; 1179f1af9d3aSPhilipp Hachtmann *idx = (u32)idx_a | (u64)idx_b << 32; 11807bd0b0f0STejun Heo return; 11817bd0b0f0STejun Heo } 11827bd0b0f0STejun Heo } 11837bd0b0f0STejun Heo } 1184f1af9d3aSPhilipp Hachtmann /* signal end of iteration */ 11857bd0b0f0STejun Heo *idx = ULLONG_MAX; 11867bd0b0f0STejun Heo } 11877bd0b0f0STejun Heo 11887c0caeb8STejun Heo #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP 11897c0caeb8STejun Heo /* 119045e79815SChen Chang * Common iterator interface used to define for_each_mem_pfn_range(). 11917c0caeb8STejun Heo */ 11927c0caeb8STejun Heo void __init_memblock __next_mem_pfn_range(int *idx, int nid, 11937c0caeb8STejun Heo unsigned long *out_start_pfn, 11947c0caeb8STejun Heo unsigned long *out_end_pfn, int *out_nid) 11957c0caeb8STejun Heo { 11967c0caeb8STejun Heo struct memblock_type *type = &memblock.memory; 11977c0caeb8STejun Heo struct memblock_region *r; 11987c0caeb8STejun Heo 11997c0caeb8STejun Heo while (++*idx < type->cnt) { 12007c0caeb8STejun Heo r = &type->regions[*idx]; 12017c0caeb8STejun Heo 12027c0caeb8STejun Heo if (PFN_UP(r->base) >= PFN_DOWN(r->base + r->size)) 12037c0caeb8STejun Heo continue; 12047c0caeb8STejun Heo if (nid == MAX_NUMNODES || nid == r->nid) 12057c0caeb8STejun Heo break; 12067c0caeb8STejun Heo } 12077c0caeb8STejun Heo if (*idx >= type->cnt) { 12087c0caeb8STejun Heo *idx = -1; 12097c0caeb8STejun Heo return; 12107c0caeb8STejun Heo } 12117c0caeb8STejun Heo 12127c0caeb8STejun Heo if (out_start_pfn) 12137c0caeb8STejun Heo *out_start_pfn = PFN_UP(r->base); 12147c0caeb8STejun Heo if (out_end_pfn) 12157c0caeb8STejun Heo *out_end_pfn = PFN_DOWN(r->base + r->size); 12167c0caeb8STejun Heo if (out_nid) 12177c0caeb8STejun Heo *out_nid = r->nid; 12187c0caeb8STejun Heo } 12197c0caeb8STejun Heo 12207c0caeb8STejun Heo /** 12217c0caeb8STejun Heo * memblock_set_node - set node ID on memblock regions 12227c0caeb8STejun Heo * @base: base of area to set node ID for 12237c0caeb8STejun Heo * @size: size of area to set node ID for 1224e7e8de59STang Chen * @type: memblock type to set node ID for 12257c0caeb8STejun Heo * @nid: node ID to set 12267c0caeb8STejun Heo * 1227e7e8de59STang Chen * Set the nid of memblock @type regions in [@base, @base + @size) to @nid. 12287c0caeb8STejun Heo * Regions which cross the area boundaries are split as necessary. 12297c0caeb8STejun Heo * 123047cec443SMike Rapoport * Return: 12317c0caeb8STejun Heo * 0 on success, -errno on failure. 12327c0caeb8STejun Heo */ 12337c0caeb8STejun Heo int __init_memblock memblock_set_node(phys_addr_t base, phys_addr_t size, 1234e7e8de59STang Chen struct memblock_type *type, int nid) 12357c0caeb8STejun Heo { 12366a9ceb31STejun Heo int start_rgn, end_rgn; 12376a9ceb31STejun Heo int i, ret; 12387c0caeb8STejun Heo 12396a9ceb31STejun Heo ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn); 12406a9ceb31STejun Heo if (ret) 12416a9ceb31STejun Heo return ret; 12427c0caeb8STejun Heo 12436a9ceb31STejun Heo for (i = start_rgn; i < end_rgn; i++) 1244e9d24ad3SWanpeng Li memblock_set_region_node(&type->regions[i], nid); 12457c0caeb8STejun Heo 12467c0caeb8STejun Heo memblock_merge_regions(type); 12477c0caeb8STejun Heo return 0; 12487c0caeb8STejun Heo } 12497c0caeb8STejun Heo #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */ 1250837566e7SAlexander Duyck #ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT 1251837566e7SAlexander Duyck /** 1252837566e7SAlexander Duyck * __next_mem_pfn_range_in_zone - iterator for for_each_*_range_in_zone() 1253837566e7SAlexander Duyck * 1254837566e7SAlexander Duyck * @idx: pointer to u64 loop variable 1255837566e7SAlexander Duyck * @zone: zone in which all of the memory blocks reside 1256837566e7SAlexander Duyck * @out_spfn: ptr to ulong for start pfn of the range, can be %NULL 1257837566e7SAlexander Duyck * @out_epfn: ptr to ulong for end pfn of the range, can be %NULL 1258837566e7SAlexander Duyck * 1259837566e7SAlexander Duyck * This function is meant to be a zone/pfn specific wrapper for the 1260837566e7SAlexander Duyck * for_each_mem_range type iterators. Specifically they are used in the 1261837566e7SAlexander Duyck * deferred memory init routines and as such we were duplicating much of 1262837566e7SAlexander Duyck * this logic throughout the code. So instead of having it in multiple 1263837566e7SAlexander Duyck * locations it seemed like it would make more sense to centralize this to 1264837566e7SAlexander Duyck * one new iterator that does everything they need. 1265837566e7SAlexander Duyck */ 1266837566e7SAlexander Duyck void __init_memblock 1267837566e7SAlexander Duyck __next_mem_pfn_range_in_zone(u64 *idx, struct zone *zone, 1268837566e7SAlexander Duyck unsigned long *out_spfn, unsigned long *out_epfn) 1269837566e7SAlexander Duyck { 1270837566e7SAlexander Duyck int zone_nid = zone_to_nid(zone); 1271837566e7SAlexander Duyck phys_addr_t spa, epa; 1272837566e7SAlexander Duyck int nid; 1273837566e7SAlexander Duyck 1274837566e7SAlexander Duyck __next_mem_range(idx, zone_nid, MEMBLOCK_NONE, 1275837566e7SAlexander Duyck &memblock.memory, &memblock.reserved, 1276837566e7SAlexander Duyck &spa, &epa, &nid); 1277837566e7SAlexander Duyck 1278837566e7SAlexander Duyck while (*idx != U64_MAX) { 1279837566e7SAlexander Duyck unsigned long epfn = PFN_DOWN(epa); 1280837566e7SAlexander Duyck unsigned long spfn = PFN_UP(spa); 1281837566e7SAlexander Duyck 1282837566e7SAlexander Duyck /* 1283837566e7SAlexander Duyck * Verify the end is at least past the start of the zone and 1284837566e7SAlexander Duyck * that we have at least one PFN to initialize. 1285837566e7SAlexander Duyck */ 1286837566e7SAlexander Duyck if (zone->zone_start_pfn < epfn && spfn < epfn) { 1287837566e7SAlexander Duyck /* if we went too far just stop searching */ 1288837566e7SAlexander Duyck if (zone_end_pfn(zone) <= spfn) { 1289837566e7SAlexander Duyck *idx = U64_MAX; 1290837566e7SAlexander Duyck break; 1291837566e7SAlexander Duyck } 1292837566e7SAlexander Duyck 1293837566e7SAlexander Duyck if (out_spfn) 1294837566e7SAlexander Duyck *out_spfn = max(zone->zone_start_pfn, spfn); 1295837566e7SAlexander Duyck if (out_epfn) 1296837566e7SAlexander Duyck *out_epfn = min(zone_end_pfn(zone), epfn); 1297837566e7SAlexander Duyck 1298837566e7SAlexander Duyck return; 1299837566e7SAlexander Duyck } 1300837566e7SAlexander Duyck 1301837566e7SAlexander Duyck __next_mem_range(idx, zone_nid, MEMBLOCK_NONE, 1302837566e7SAlexander Duyck &memblock.memory, &memblock.reserved, 1303837566e7SAlexander Duyck &spa, &epa, &nid); 1304837566e7SAlexander Duyck } 1305837566e7SAlexander Duyck 1306837566e7SAlexander Duyck /* signal end of iteration */ 1307837566e7SAlexander Duyck if (out_spfn) 1308837566e7SAlexander Duyck *out_spfn = ULONG_MAX; 1309837566e7SAlexander Duyck if (out_epfn) 1310837566e7SAlexander Duyck *out_epfn = 0; 1311837566e7SAlexander Duyck } 1312837566e7SAlexander Duyck 1313837566e7SAlexander Duyck #endif /* CONFIG_DEFERRED_STRUCT_PAGE_INIT */ 13147c0caeb8STejun Heo 131592d12f95SMike Rapoport /** 131692d12f95SMike Rapoport * memblock_alloc_range_nid - allocate boot memory block 131792d12f95SMike Rapoport * @size: size of memory block to be allocated in bytes 131892d12f95SMike Rapoport * @align: alignment of the region and block's size 131992d12f95SMike Rapoport * @start: the lower bound of the memory region to allocate (phys address) 132092d12f95SMike Rapoport * @end: the upper bound of the memory region to allocate (phys address) 132192d12f95SMike Rapoport * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 132292d12f95SMike Rapoport * 132392d12f95SMike Rapoport * The allocation is performed from memory region limited by 1324*95830666SCao jin * memblock.current_limit if @end == %MEMBLOCK_ALLOC_ACCESSIBLE. 132592d12f95SMike Rapoport * 132692d12f95SMike Rapoport * If the specified node can not hold the requested memory the 132792d12f95SMike Rapoport * allocation falls back to any node in the system 132892d12f95SMike Rapoport * 132992d12f95SMike Rapoport * For systems with memory mirroring, the allocation is attempted first 133092d12f95SMike Rapoport * from the regions with mirroring enabled and then retried from any 133192d12f95SMike Rapoport * memory region. 133292d12f95SMike Rapoport * 133392d12f95SMike Rapoport * In addition, function sets the min_count to 0 using kmemleak_alloc_phys for 133492d12f95SMike Rapoport * allocated boot memory block, so that it is never reported as leaks. 133592d12f95SMike Rapoport * 133692d12f95SMike Rapoport * Return: 133792d12f95SMike Rapoport * Physical address of allocated memory block on success, %0 on failure. 133892d12f95SMike Rapoport */ 13392bfc2862SAkinobu Mita static phys_addr_t __init memblock_alloc_range_nid(phys_addr_t size, 13402bfc2862SAkinobu Mita phys_addr_t align, phys_addr_t start, 134192d12f95SMike Rapoport phys_addr_t end, int nid) 134295f72d1eSYinghai Lu { 134392d12f95SMike Rapoport enum memblock_flags flags = choose_memblock_flags(); 13446ed311b2SBenjamin Herrenschmidt phys_addr_t found; 134595f72d1eSYinghai Lu 134692d12f95SMike Rapoport if (WARN_ONCE(nid == MAX_NUMNODES, "Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n")) 134792d12f95SMike Rapoport nid = NUMA_NO_NODE; 134892d12f95SMike Rapoport 13492f770806SMike Rapoport if (!align) { 13502f770806SMike Rapoport /* Can't use WARNs this early in boot on powerpc */ 13512f770806SMike Rapoport dump_stack(); 13522f770806SMike Rapoport align = SMP_CACHE_BYTES; 13532f770806SMike Rapoport } 13542f770806SMike Rapoport 135592d12f95SMike Rapoport again: 1356fc6daaf9STony Luck found = memblock_find_in_range_node(size, align, start, end, nid, 1357fc6daaf9STony Luck flags); 135892d12f95SMike Rapoport if (found && !memblock_reserve(found, size)) 135992d12f95SMike Rapoport goto done; 136092d12f95SMike Rapoport 136192d12f95SMike Rapoport if (nid != NUMA_NO_NODE) { 136292d12f95SMike Rapoport found = memblock_find_in_range_node(size, align, start, 136392d12f95SMike Rapoport end, NUMA_NO_NODE, 136492d12f95SMike Rapoport flags); 136592d12f95SMike Rapoport if (found && !memblock_reserve(found, size)) 136692d12f95SMike Rapoport goto done; 136792d12f95SMike Rapoport } 136892d12f95SMike Rapoport 136992d12f95SMike Rapoport if (flags & MEMBLOCK_MIRROR) { 137092d12f95SMike Rapoport flags &= ~MEMBLOCK_MIRROR; 137192d12f95SMike Rapoport pr_warn("Could not allocate %pap bytes of mirrored memory\n", 137292d12f95SMike Rapoport &size); 137392d12f95SMike Rapoport goto again; 137492d12f95SMike Rapoport } 137592d12f95SMike Rapoport 137692d12f95SMike Rapoport return 0; 137792d12f95SMike Rapoport 137892d12f95SMike Rapoport done: 137992d12f95SMike Rapoport /* Skip kmemleak for kasan_init() due to high volume. */ 138092d12f95SMike Rapoport if (end != MEMBLOCK_ALLOC_KASAN) 1381aedf95eaSCatalin Marinas /* 138292d12f95SMike Rapoport * The min_count is set to 0 so that memblock allocated 138392d12f95SMike Rapoport * blocks are never reported as leaks. This is because many 138492d12f95SMike Rapoport * of these blocks are only referred via the physical 138592d12f95SMike Rapoport * address which is not looked up by kmemleak. 1386aedf95eaSCatalin Marinas */ 13879099daedSCatalin Marinas kmemleak_alloc_phys(found, size, 0, 0); 138892d12f95SMike Rapoport 13896ed311b2SBenjamin Herrenschmidt return found; 1390aedf95eaSCatalin Marinas } 139195f72d1eSYinghai Lu 1392a2974133SMike Rapoport /** 1393a2974133SMike Rapoport * memblock_phys_alloc_range - allocate a memory block inside specified range 1394a2974133SMike Rapoport * @size: size of memory block to be allocated in bytes 1395a2974133SMike Rapoport * @align: alignment of the region and block's size 1396a2974133SMike Rapoport * @start: the lower bound of the memory region to allocate (physical address) 1397a2974133SMike Rapoport * @end: the upper bound of the memory region to allocate (physical address) 1398a2974133SMike Rapoport * 1399a2974133SMike Rapoport * Allocate @size bytes in the between @start and @end. 1400a2974133SMike Rapoport * 1401a2974133SMike Rapoport * Return: physical address of the allocated memory block on success, 1402a2974133SMike Rapoport * %0 on failure. 1403a2974133SMike Rapoport */ 14048a770c2aSMike Rapoport phys_addr_t __init memblock_phys_alloc_range(phys_addr_t size, 14058a770c2aSMike Rapoport phys_addr_t align, 14068a770c2aSMike Rapoport phys_addr_t start, 14078a770c2aSMike Rapoport phys_addr_t end) 14082bfc2862SAkinobu Mita { 140992d12f95SMike Rapoport return memblock_alloc_range_nid(size, align, start, end, NUMA_NO_NODE); 14107bd0b0f0STejun Heo } 14117bd0b0f0STejun Heo 1412a2974133SMike Rapoport /** 1413a2974133SMike Rapoport * memblock_phys_alloc_try_nid - allocate a memory block from specified MUMA node 1414a2974133SMike Rapoport * @size: size of memory block to be allocated in bytes 1415a2974133SMike Rapoport * @align: alignment of the region and block's size 1416a2974133SMike Rapoport * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 1417a2974133SMike Rapoport * 1418a2974133SMike Rapoport * Allocates memory block from the specified NUMA node. If the node 1419a2974133SMike Rapoport * has no available memory, attempts to allocated from any node in the 1420a2974133SMike Rapoport * system. 1421a2974133SMike Rapoport * 1422a2974133SMike Rapoport * Return: physical address of the allocated memory block on success, 1423a2974133SMike Rapoport * %0 on failure. 1424a2974133SMike Rapoport */ 14259a8dd708SMike Rapoport phys_addr_t __init memblock_phys_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid) 14269d1e2492SBenjamin Herrenschmidt { 142733755574SMike Rapoport return memblock_alloc_range_nid(size, align, 0, 142892d12f95SMike Rapoport MEMBLOCK_ALLOC_ACCESSIBLE, nid); 142995f72d1eSYinghai Lu } 143095f72d1eSYinghai Lu 143126f09e9bSSantosh Shilimkar /** 1432eb31d559SMike Rapoport * memblock_alloc_internal - allocate boot memory block 143326f09e9bSSantosh Shilimkar * @size: size of memory block to be allocated in bytes 143426f09e9bSSantosh Shilimkar * @align: alignment of the region and block's size 143526f09e9bSSantosh Shilimkar * @min_addr: the lower bound of the memory region to allocate (phys address) 143626f09e9bSSantosh Shilimkar * @max_addr: the upper bound of the memory region to allocate (phys address) 143726f09e9bSSantosh Shilimkar * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 143826f09e9bSSantosh Shilimkar * 143992d12f95SMike Rapoport * Allocates memory block using memblock_alloc_range_nid() and 144092d12f95SMike Rapoport * converts the returned physical address to virtual. 144192d12f95SMike Rapoport * 144226f09e9bSSantosh Shilimkar * The @min_addr limit is dropped if it can not be satisfied and the allocation 144392d12f95SMike Rapoport * will fall back to memory below @min_addr. Other constraints, such 144492d12f95SMike Rapoport * as node and mirrored memory will be handled again in 144592d12f95SMike Rapoport * memblock_alloc_range_nid(). 144626f09e9bSSantosh Shilimkar * 144747cec443SMike Rapoport * Return: 144826f09e9bSSantosh Shilimkar * Virtual address of allocated memory block on success, NULL on failure. 144926f09e9bSSantosh Shilimkar */ 1450eb31d559SMike Rapoport static void * __init memblock_alloc_internal( 145126f09e9bSSantosh Shilimkar phys_addr_t size, phys_addr_t align, 145226f09e9bSSantosh Shilimkar phys_addr_t min_addr, phys_addr_t max_addr, 145326f09e9bSSantosh Shilimkar int nid) 145426f09e9bSSantosh Shilimkar { 145526f09e9bSSantosh Shilimkar phys_addr_t alloc; 145626f09e9bSSantosh Shilimkar 145726f09e9bSSantosh Shilimkar /* 145826f09e9bSSantosh Shilimkar * Detect any accidental use of these APIs after slab is ready, as at 145926f09e9bSSantosh Shilimkar * this moment memblock may be deinitialized already and its 1460c6ffc5caSMike Rapoport * internal data may be destroyed (after execution of memblock_free_all) 146126f09e9bSSantosh Shilimkar */ 146226f09e9bSSantosh Shilimkar if (WARN_ON_ONCE(slab_is_available())) 146326f09e9bSSantosh Shilimkar return kzalloc_node(size, GFP_NOWAIT, nid); 146426f09e9bSSantosh Shilimkar 1465f3057ad7SMike Rapoport if (max_addr > memblock.current_limit) 1466f3057ad7SMike Rapoport max_addr = memblock.current_limit; 1467f3057ad7SMike Rapoport 146892d12f95SMike Rapoport alloc = memblock_alloc_range_nid(size, align, min_addr, max_addr, nid); 14692f770806SMike Rapoport 147092d12f95SMike Rapoport /* retry allocation without lower limit */ 147192d12f95SMike Rapoport if (!alloc && min_addr) 147292d12f95SMike Rapoport alloc = memblock_alloc_range_nid(size, align, 0, max_addr, nid); 147326f09e9bSSantosh Shilimkar 147492d12f95SMike Rapoport if (!alloc) 1475a3f5bafcSTony Luck return NULL; 147626f09e9bSSantosh Shilimkar 147792d12f95SMike Rapoport return phys_to_virt(alloc); 147826f09e9bSSantosh Shilimkar } 147926f09e9bSSantosh Shilimkar 148026f09e9bSSantosh Shilimkar /** 1481eb31d559SMike Rapoport * memblock_alloc_try_nid_raw - allocate boot memory block without zeroing 1482ea1f5f37SPavel Tatashin * memory and without panicking 1483ea1f5f37SPavel Tatashin * @size: size of memory block to be allocated in bytes 1484ea1f5f37SPavel Tatashin * @align: alignment of the region and block's size 1485ea1f5f37SPavel Tatashin * @min_addr: the lower bound of the memory region from where the allocation 1486ea1f5f37SPavel Tatashin * is preferred (phys address) 1487ea1f5f37SPavel Tatashin * @max_addr: the upper bound of the memory region from where the allocation 148897ad1087SMike Rapoport * is preferred (phys address), or %MEMBLOCK_ALLOC_ACCESSIBLE to 1489ea1f5f37SPavel Tatashin * allocate only from memory limited by memblock.current_limit value 1490ea1f5f37SPavel Tatashin * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 1491ea1f5f37SPavel Tatashin * 1492ea1f5f37SPavel Tatashin * Public function, provides additional debug information (including caller 1493ea1f5f37SPavel Tatashin * info), if enabled. Does not zero allocated memory, does not panic if request 1494ea1f5f37SPavel Tatashin * cannot be satisfied. 1495ea1f5f37SPavel Tatashin * 149647cec443SMike Rapoport * Return: 1497ea1f5f37SPavel Tatashin * Virtual address of allocated memory block on success, NULL on failure. 1498ea1f5f37SPavel Tatashin */ 1499eb31d559SMike Rapoport void * __init memblock_alloc_try_nid_raw( 1500ea1f5f37SPavel Tatashin phys_addr_t size, phys_addr_t align, 1501ea1f5f37SPavel Tatashin phys_addr_t min_addr, phys_addr_t max_addr, 1502ea1f5f37SPavel Tatashin int nid) 1503ea1f5f37SPavel Tatashin { 1504ea1f5f37SPavel Tatashin void *ptr; 1505ea1f5f37SPavel Tatashin 1506d75f773cSSakari Ailus memblock_dbg("%s: %llu bytes align=0x%llx nid=%d from=%pa max_addr=%pa %pS\n", 1507a36aab89SMike Rapoport __func__, (u64)size, (u64)align, nid, &min_addr, 1508a36aab89SMike Rapoport &max_addr, (void *)_RET_IP_); 1509ea1f5f37SPavel Tatashin 1510eb31d559SMike Rapoport ptr = memblock_alloc_internal(size, align, 1511ea1f5f37SPavel Tatashin min_addr, max_addr, nid); 1512ea1f5f37SPavel Tatashin if (ptr && size > 0) 1513f682a97aSAlexander Duyck page_init_poison(ptr, size); 1514f682a97aSAlexander Duyck 1515ea1f5f37SPavel Tatashin return ptr; 1516ea1f5f37SPavel Tatashin } 1517ea1f5f37SPavel Tatashin 1518ea1f5f37SPavel Tatashin /** 1519c0dbe825SMike Rapoport * memblock_alloc_try_nid - allocate boot memory block 152026f09e9bSSantosh Shilimkar * @size: size of memory block to be allocated in bytes 152126f09e9bSSantosh Shilimkar * @align: alignment of the region and block's size 152226f09e9bSSantosh Shilimkar * @min_addr: the lower bound of the memory region from where the allocation 152326f09e9bSSantosh Shilimkar * is preferred (phys address) 152426f09e9bSSantosh Shilimkar * @max_addr: the upper bound of the memory region from where the allocation 152597ad1087SMike Rapoport * is preferred (phys address), or %MEMBLOCK_ALLOC_ACCESSIBLE to 152626f09e9bSSantosh Shilimkar * allocate only from memory limited by memblock.current_limit value 152726f09e9bSSantosh Shilimkar * @nid: nid of the free area to find, %NUMA_NO_NODE for any node 152826f09e9bSSantosh Shilimkar * 1529c0dbe825SMike Rapoport * Public function, provides additional debug information (including caller 1530c0dbe825SMike Rapoport * info), if enabled. This function zeroes the allocated memory. 153126f09e9bSSantosh Shilimkar * 153247cec443SMike Rapoport * Return: 153326f09e9bSSantosh Shilimkar * Virtual address of allocated memory block on success, NULL on failure. 153426f09e9bSSantosh Shilimkar */ 1535eb31d559SMike Rapoport void * __init memblock_alloc_try_nid( 153626f09e9bSSantosh Shilimkar phys_addr_t size, phys_addr_t align, 153726f09e9bSSantosh Shilimkar phys_addr_t min_addr, phys_addr_t max_addr, 153826f09e9bSSantosh Shilimkar int nid) 153926f09e9bSSantosh Shilimkar { 154026f09e9bSSantosh Shilimkar void *ptr; 154126f09e9bSSantosh Shilimkar 1542d75f773cSSakari Ailus memblock_dbg("%s: %llu bytes align=0x%llx nid=%d from=%pa max_addr=%pa %pS\n", 1543a36aab89SMike Rapoport __func__, (u64)size, (u64)align, nid, &min_addr, 1544a36aab89SMike Rapoport &max_addr, (void *)_RET_IP_); 1545eb31d559SMike Rapoport ptr = memblock_alloc_internal(size, align, 154626f09e9bSSantosh Shilimkar min_addr, max_addr, nid); 1547c0dbe825SMike Rapoport if (ptr) 1548ea1f5f37SPavel Tatashin memset(ptr, 0, size); 154926f09e9bSSantosh Shilimkar 1550c0dbe825SMike Rapoport return ptr; 155126f09e9bSSantosh Shilimkar } 155226f09e9bSSantosh Shilimkar 155326f09e9bSSantosh Shilimkar /** 1554a2974133SMike Rapoport * __memblock_free_late - free pages directly to buddy allocator 155548a833ccSMike Rapoport * @base: phys starting address of the boot memory block 155626f09e9bSSantosh Shilimkar * @size: size of the boot memory block in bytes 155726f09e9bSSantosh Shilimkar * 1558a2974133SMike Rapoport * This is only useful when the memblock allocator has already been torn 155926f09e9bSSantosh Shilimkar * down, but we are still initializing the system. Pages are released directly 1560a2974133SMike Rapoport * to the buddy allocator. 156126f09e9bSSantosh Shilimkar */ 156226f09e9bSSantosh Shilimkar void __init __memblock_free_late(phys_addr_t base, phys_addr_t size) 156326f09e9bSSantosh Shilimkar { 1564a36aab89SMike Rapoport phys_addr_t cursor, end; 156526f09e9bSSantosh Shilimkar 1566a36aab89SMike Rapoport end = base + size - 1; 1567d75f773cSSakari Ailus memblock_dbg("%s: [%pa-%pa] %pS\n", 1568a36aab89SMike Rapoport __func__, &base, &end, (void *)_RET_IP_); 15699099daedSCatalin Marinas kmemleak_free_part_phys(base, size); 157026f09e9bSSantosh Shilimkar cursor = PFN_UP(base); 157126f09e9bSSantosh Shilimkar end = PFN_DOWN(base + size); 157226f09e9bSSantosh Shilimkar 157326f09e9bSSantosh Shilimkar for (; cursor < end; cursor++) { 15747c2ee349SMike Rapoport memblock_free_pages(pfn_to_page(cursor), cursor, 0); 1575ca79b0c2SArun KS totalram_pages_inc(); 157626f09e9bSSantosh Shilimkar } 157726f09e9bSSantosh Shilimkar } 15789d1e2492SBenjamin Herrenschmidt 15799d1e2492SBenjamin Herrenschmidt /* 15809d1e2492SBenjamin Herrenschmidt * Remaining API functions 15819d1e2492SBenjamin Herrenschmidt */ 15829d1e2492SBenjamin Herrenschmidt 15831f1ffb8aSDavid Gibson phys_addr_t __init_memblock memblock_phys_mem_size(void) 158495f72d1eSYinghai Lu { 15851440c4e2STejun Heo return memblock.memory.total_size; 158695f72d1eSYinghai Lu } 158795f72d1eSYinghai Lu 15888907de5dSSrikar Dronamraju phys_addr_t __init_memblock memblock_reserved_size(void) 15898907de5dSSrikar Dronamraju { 15908907de5dSSrikar Dronamraju return memblock.reserved.total_size; 15918907de5dSSrikar Dronamraju } 15928907de5dSSrikar Dronamraju 1593595ad9afSYinghai Lu phys_addr_t __init memblock_mem_size(unsigned long limit_pfn) 1594595ad9afSYinghai Lu { 1595595ad9afSYinghai Lu unsigned long pages = 0; 1596595ad9afSYinghai Lu struct memblock_region *r; 1597595ad9afSYinghai Lu unsigned long start_pfn, end_pfn; 1598595ad9afSYinghai Lu 1599595ad9afSYinghai Lu for_each_memblock(memory, r) { 1600595ad9afSYinghai Lu start_pfn = memblock_region_memory_base_pfn(r); 1601595ad9afSYinghai Lu end_pfn = memblock_region_memory_end_pfn(r); 1602595ad9afSYinghai Lu start_pfn = min_t(unsigned long, start_pfn, limit_pfn); 1603595ad9afSYinghai Lu end_pfn = min_t(unsigned long, end_pfn, limit_pfn); 1604595ad9afSYinghai Lu pages += end_pfn - start_pfn; 1605595ad9afSYinghai Lu } 1606595ad9afSYinghai Lu 160716763230SFabian Frederick return PFN_PHYS(pages); 1608595ad9afSYinghai Lu } 1609595ad9afSYinghai Lu 16100a93ebefSSam Ravnborg /* lowest address */ 16110a93ebefSSam Ravnborg phys_addr_t __init_memblock memblock_start_of_DRAM(void) 16120a93ebefSSam Ravnborg { 16130a93ebefSSam Ravnborg return memblock.memory.regions[0].base; 16140a93ebefSSam Ravnborg } 16150a93ebefSSam Ravnborg 161610d06439SYinghai Lu phys_addr_t __init_memblock memblock_end_of_DRAM(void) 161795f72d1eSYinghai Lu { 161895f72d1eSYinghai Lu int idx = memblock.memory.cnt - 1; 161995f72d1eSYinghai Lu 1620e3239ff9SBenjamin Herrenschmidt return (memblock.memory.regions[idx].base + memblock.memory.regions[idx].size); 162195f72d1eSYinghai Lu } 162295f72d1eSYinghai Lu 1623a571d4ebSDennis Chen static phys_addr_t __init_memblock __find_max_addr(phys_addr_t limit) 162495f72d1eSYinghai Lu { 16251c4bc43dSStefan Agner phys_addr_t max_addr = PHYS_ADDR_MAX; 1626136199f0SEmil Medve struct memblock_region *r; 162795f72d1eSYinghai Lu 1628a571d4ebSDennis Chen /* 1629a571d4ebSDennis Chen * translate the memory @limit size into the max address within one of 1630a571d4ebSDennis Chen * the memory memblock regions, if the @limit exceeds the total size 16311c4bc43dSStefan Agner * of those regions, max_addr will keep original value PHYS_ADDR_MAX 1632a571d4ebSDennis Chen */ 1633136199f0SEmil Medve for_each_memblock(memory, r) { 1634c0ce8fefSTejun Heo if (limit <= r->size) { 1635c0ce8fefSTejun Heo max_addr = r->base + limit; 163695f72d1eSYinghai Lu break; 163795f72d1eSYinghai Lu } 1638c0ce8fefSTejun Heo limit -= r->size; 163995f72d1eSYinghai Lu } 1640c0ce8fefSTejun Heo 1641a571d4ebSDennis Chen return max_addr; 1642a571d4ebSDennis Chen } 1643a571d4ebSDennis Chen 1644a571d4ebSDennis Chen void __init memblock_enforce_memory_limit(phys_addr_t limit) 1645a571d4ebSDennis Chen { 16461c4bc43dSStefan Agner phys_addr_t max_addr = PHYS_ADDR_MAX; 1647a571d4ebSDennis Chen 1648a571d4ebSDennis Chen if (!limit) 1649a571d4ebSDennis Chen return; 1650a571d4ebSDennis Chen 1651a571d4ebSDennis Chen max_addr = __find_max_addr(limit); 1652a571d4ebSDennis Chen 1653a571d4ebSDennis Chen /* @limit exceeds the total size of the memory, do nothing */ 16541c4bc43dSStefan Agner if (max_addr == PHYS_ADDR_MAX) 1655a571d4ebSDennis Chen return; 1656a571d4ebSDennis Chen 1657c0ce8fefSTejun Heo /* truncate both memory and reserved regions */ 1658f1af9d3aSPhilipp Hachtmann memblock_remove_range(&memblock.memory, max_addr, 16591c4bc43dSStefan Agner PHYS_ADDR_MAX); 1660f1af9d3aSPhilipp Hachtmann memblock_remove_range(&memblock.reserved, max_addr, 16611c4bc43dSStefan Agner PHYS_ADDR_MAX); 166295f72d1eSYinghai Lu } 166395f72d1eSYinghai Lu 1664c9ca9b4eSAKASHI Takahiro void __init memblock_cap_memory_range(phys_addr_t base, phys_addr_t size) 1665c9ca9b4eSAKASHI Takahiro { 1666c9ca9b4eSAKASHI Takahiro int start_rgn, end_rgn; 1667c9ca9b4eSAKASHI Takahiro int i, ret; 1668c9ca9b4eSAKASHI Takahiro 1669c9ca9b4eSAKASHI Takahiro if (!size) 1670c9ca9b4eSAKASHI Takahiro return; 1671c9ca9b4eSAKASHI Takahiro 1672c9ca9b4eSAKASHI Takahiro ret = memblock_isolate_range(&memblock.memory, base, size, 1673c9ca9b4eSAKASHI Takahiro &start_rgn, &end_rgn); 1674c9ca9b4eSAKASHI Takahiro if (ret) 1675c9ca9b4eSAKASHI Takahiro return; 1676c9ca9b4eSAKASHI Takahiro 1677c9ca9b4eSAKASHI Takahiro /* remove all the MAP regions */ 1678c9ca9b4eSAKASHI Takahiro for (i = memblock.memory.cnt - 1; i >= end_rgn; i--) 1679c9ca9b4eSAKASHI Takahiro if (!memblock_is_nomap(&memblock.memory.regions[i])) 1680c9ca9b4eSAKASHI Takahiro memblock_remove_region(&memblock.memory, i); 1681c9ca9b4eSAKASHI Takahiro 1682c9ca9b4eSAKASHI Takahiro for (i = start_rgn - 1; i >= 0; i--) 1683c9ca9b4eSAKASHI Takahiro if (!memblock_is_nomap(&memblock.memory.regions[i])) 1684c9ca9b4eSAKASHI Takahiro memblock_remove_region(&memblock.memory, i); 1685c9ca9b4eSAKASHI Takahiro 1686c9ca9b4eSAKASHI Takahiro /* truncate the reserved regions */ 1687c9ca9b4eSAKASHI Takahiro memblock_remove_range(&memblock.reserved, 0, base); 1688c9ca9b4eSAKASHI Takahiro memblock_remove_range(&memblock.reserved, 16891c4bc43dSStefan Agner base + size, PHYS_ADDR_MAX); 1690c9ca9b4eSAKASHI Takahiro } 1691c9ca9b4eSAKASHI Takahiro 1692a571d4ebSDennis Chen void __init memblock_mem_limit_remove_map(phys_addr_t limit) 1693a571d4ebSDennis Chen { 1694a571d4ebSDennis Chen phys_addr_t max_addr; 1695a571d4ebSDennis Chen 1696a571d4ebSDennis Chen if (!limit) 1697a571d4ebSDennis Chen return; 1698a571d4ebSDennis Chen 1699a571d4ebSDennis Chen max_addr = __find_max_addr(limit); 1700a571d4ebSDennis Chen 1701a571d4ebSDennis Chen /* @limit exceeds the total size of the memory, do nothing */ 17021c4bc43dSStefan Agner if (max_addr == PHYS_ADDR_MAX) 1703a571d4ebSDennis Chen return; 1704a571d4ebSDennis Chen 1705c9ca9b4eSAKASHI Takahiro memblock_cap_memory_range(0, max_addr); 1706a571d4ebSDennis Chen } 1707a571d4ebSDennis Chen 1708cd79481dSYinghai Lu static int __init_memblock memblock_search(struct memblock_type *type, phys_addr_t addr) 170972d4b0b4SBenjamin Herrenschmidt { 171072d4b0b4SBenjamin Herrenschmidt unsigned int left = 0, right = type->cnt; 171172d4b0b4SBenjamin Herrenschmidt 171272d4b0b4SBenjamin Herrenschmidt do { 171372d4b0b4SBenjamin Herrenschmidt unsigned int mid = (right + left) / 2; 171472d4b0b4SBenjamin Herrenschmidt 171572d4b0b4SBenjamin Herrenschmidt if (addr < type->regions[mid].base) 171672d4b0b4SBenjamin Herrenschmidt right = mid; 171772d4b0b4SBenjamin Herrenschmidt else if (addr >= (type->regions[mid].base + 171872d4b0b4SBenjamin Herrenschmidt type->regions[mid].size)) 171972d4b0b4SBenjamin Herrenschmidt left = mid + 1; 172072d4b0b4SBenjamin Herrenschmidt else 172172d4b0b4SBenjamin Herrenschmidt return mid; 172272d4b0b4SBenjamin Herrenschmidt } while (left < right); 172372d4b0b4SBenjamin Herrenschmidt return -1; 172472d4b0b4SBenjamin Herrenschmidt } 172572d4b0b4SBenjamin Herrenschmidt 1726f5a222dcSYueyi Li bool __init_memblock memblock_is_reserved(phys_addr_t addr) 172795f72d1eSYinghai Lu { 172872d4b0b4SBenjamin Herrenschmidt return memblock_search(&memblock.reserved, addr) != -1; 172995f72d1eSYinghai Lu } 173072d4b0b4SBenjamin Herrenschmidt 1731b4ad0c7eSYaowei Bai bool __init_memblock memblock_is_memory(phys_addr_t addr) 173272d4b0b4SBenjamin Herrenschmidt { 173372d4b0b4SBenjamin Herrenschmidt return memblock_search(&memblock.memory, addr) != -1; 173472d4b0b4SBenjamin Herrenschmidt } 173572d4b0b4SBenjamin Herrenschmidt 1736937f0c26SYaowei Bai bool __init_memblock memblock_is_map_memory(phys_addr_t addr) 1737bf3d3cc5SArd Biesheuvel { 1738bf3d3cc5SArd Biesheuvel int i = memblock_search(&memblock.memory, addr); 1739bf3d3cc5SArd Biesheuvel 1740bf3d3cc5SArd Biesheuvel if (i == -1) 1741bf3d3cc5SArd Biesheuvel return false; 1742bf3d3cc5SArd Biesheuvel return !memblock_is_nomap(&memblock.memory.regions[i]); 1743bf3d3cc5SArd Biesheuvel } 1744bf3d3cc5SArd Biesheuvel 1745e76b63f8SYinghai Lu #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP 1746e76b63f8SYinghai Lu int __init_memblock memblock_search_pfn_nid(unsigned long pfn, 1747e76b63f8SYinghai Lu unsigned long *start_pfn, unsigned long *end_pfn) 1748e76b63f8SYinghai Lu { 1749e76b63f8SYinghai Lu struct memblock_type *type = &memblock.memory; 175016763230SFabian Frederick int mid = memblock_search(type, PFN_PHYS(pfn)); 1751e76b63f8SYinghai Lu 1752e76b63f8SYinghai Lu if (mid == -1) 1753e76b63f8SYinghai Lu return -1; 1754e76b63f8SYinghai Lu 1755f7e2f7e8SFabian Frederick *start_pfn = PFN_DOWN(type->regions[mid].base); 1756f7e2f7e8SFabian Frederick *end_pfn = PFN_DOWN(type->regions[mid].base + type->regions[mid].size); 1757e76b63f8SYinghai Lu 1758e76b63f8SYinghai Lu return type->regions[mid].nid; 1759e76b63f8SYinghai Lu } 1760e76b63f8SYinghai Lu #endif 1761e76b63f8SYinghai Lu 1762eab30949SStephen Boyd /** 1763eab30949SStephen Boyd * memblock_is_region_memory - check if a region is a subset of memory 1764eab30949SStephen Boyd * @base: base of region to check 1765eab30949SStephen Boyd * @size: size of region to check 1766eab30949SStephen Boyd * 1767eab30949SStephen Boyd * Check if the region [@base, @base + @size) is a subset of a memory block. 1768eab30949SStephen Boyd * 176947cec443SMike Rapoport * Return: 1770eab30949SStephen Boyd * 0 if false, non-zero if true 1771eab30949SStephen Boyd */ 1772937f0c26SYaowei Bai bool __init_memblock memblock_is_region_memory(phys_addr_t base, phys_addr_t size) 177372d4b0b4SBenjamin Herrenschmidt { 1774abb65272STomi Valkeinen int idx = memblock_search(&memblock.memory, base); 1775eb18f1b5STejun Heo phys_addr_t end = base + memblock_cap_size(base, &size); 177672d4b0b4SBenjamin Herrenschmidt 177772d4b0b4SBenjamin Herrenschmidt if (idx == -1) 1778937f0c26SYaowei Bai return false; 1779ef415ef4SWei Yang return (memblock.memory.regions[idx].base + 1780eb18f1b5STejun Heo memblock.memory.regions[idx].size) >= end; 178195f72d1eSYinghai Lu } 178295f72d1eSYinghai Lu 1783eab30949SStephen Boyd /** 1784eab30949SStephen Boyd * memblock_is_region_reserved - check if a region intersects reserved memory 1785eab30949SStephen Boyd * @base: base of region to check 1786eab30949SStephen Boyd * @size: size of region to check 1787eab30949SStephen Boyd * 178847cec443SMike Rapoport * Check if the region [@base, @base + @size) intersects a reserved 178947cec443SMike Rapoport * memory block. 1790eab30949SStephen Boyd * 179147cec443SMike Rapoport * Return: 1792c5c5c9d1STang Chen * True if they intersect, false if not. 1793eab30949SStephen Boyd */ 1794c5c5c9d1STang Chen bool __init_memblock memblock_is_region_reserved(phys_addr_t base, phys_addr_t size) 179595f72d1eSYinghai Lu { 1796eb18f1b5STejun Heo memblock_cap_size(base, &size); 1797c5c5c9d1STang Chen return memblock_overlaps_region(&memblock.reserved, base, size); 179895f72d1eSYinghai Lu } 179995f72d1eSYinghai Lu 18006ede1fd3SYinghai Lu void __init_memblock memblock_trim_memory(phys_addr_t align) 18016ede1fd3SYinghai Lu { 18026ede1fd3SYinghai Lu phys_addr_t start, end, orig_start, orig_end; 1803136199f0SEmil Medve struct memblock_region *r; 18046ede1fd3SYinghai Lu 1805136199f0SEmil Medve for_each_memblock(memory, r) { 1806136199f0SEmil Medve orig_start = r->base; 1807136199f0SEmil Medve orig_end = r->base + r->size; 18086ede1fd3SYinghai Lu start = round_up(orig_start, align); 18096ede1fd3SYinghai Lu end = round_down(orig_end, align); 18106ede1fd3SYinghai Lu 18116ede1fd3SYinghai Lu if (start == orig_start && end == orig_end) 18126ede1fd3SYinghai Lu continue; 18136ede1fd3SYinghai Lu 18146ede1fd3SYinghai Lu if (start < end) { 1815136199f0SEmil Medve r->base = start; 1816136199f0SEmil Medve r->size = end - start; 18176ede1fd3SYinghai Lu } else { 1818136199f0SEmil Medve memblock_remove_region(&memblock.memory, 1819136199f0SEmil Medve r - memblock.memory.regions); 1820136199f0SEmil Medve r--; 18216ede1fd3SYinghai Lu } 18226ede1fd3SYinghai Lu } 18236ede1fd3SYinghai Lu } 1824e63075a3SBenjamin Herrenschmidt 18253661ca66SYinghai Lu void __init_memblock memblock_set_current_limit(phys_addr_t limit) 1826e63075a3SBenjamin Herrenschmidt { 1827e63075a3SBenjamin Herrenschmidt memblock.current_limit = limit; 1828e63075a3SBenjamin Herrenschmidt } 1829e63075a3SBenjamin Herrenschmidt 1830fec51014SLaura Abbott phys_addr_t __init_memblock memblock_get_current_limit(void) 1831fec51014SLaura Abbott { 1832fec51014SLaura Abbott return memblock.current_limit; 1833fec51014SLaura Abbott } 1834fec51014SLaura Abbott 18350262d9c8SHeiko Carstens static void __init_memblock memblock_dump(struct memblock_type *type) 18366ed311b2SBenjamin Herrenschmidt { 18375d63f81cSMiles Chen phys_addr_t base, end, size; 1838e1720feeSMike Rapoport enum memblock_flags flags; 18398c9c1701SAlexander Kuleshov int idx; 18408c9c1701SAlexander Kuleshov struct memblock_region *rgn; 18416ed311b2SBenjamin Herrenschmidt 18420262d9c8SHeiko Carstens pr_info(" %s.cnt = 0x%lx\n", type->name, type->cnt); 18436ed311b2SBenjamin Herrenschmidt 184466e8b438SGioh Kim for_each_memblock_type(idx, type, rgn) { 18457c0caeb8STejun Heo char nid_buf[32] = ""; 18466ed311b2SBenjamin Herrenschmidt 18477c0caeb8STejun Heo base = rgn->base; 18487c0caeb8STejun Heo size = rgn->size; 18495d63f81cSMiles Chen end = base + size - 1; 185066a20757STang Chen flags = rgn->flags; 18517c0caeb8STejun Heo #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP 18527c0caeb8STejun Heo if (memblock_get_region_node(rgn) != MAX_NUMNODES) 18537c0caeb8STejun Heo snprintf(nid_buf, sizeof(nid_buf), " on node %d", 18547c0caeb8STejun Heo memblock_get_region_node(rgn)); 18557c0caeb8STejun Heo #endif 1856e1720feeSMike Rapoport pr_info(" %s[%#x]\t[%pa-%pa], %pa bytes%s flags: %#x\n", 18570262d9c8SHeiko Carstens type->name, idx, &base, &end, &size, nid_buf, flags); 18586ed311b2SBenjamin Herrenschmidt } 18596ed311b2SBenjamin Herrenschmidt } 18606ed311b2SBenjamin Herrenschmidt 18614ff7b82fSTejun Heo void __init_memblock __memblock_dump_all(void) 18626ed311b2SBenjamin Herrenschmidt { 18636ed311b2SBenjamin Herrenschmidt pr_info("MEMBLOCK configuration:\n"); 18645d63f81cSMiles Chen pr_info(" memory size = %pa reserved size = %pa\n", 18655d63f81cSMiles Chen &memblock.memory.total_size, 18665d63f81cSMiles Chen &memblock.reserved.total_size); 18676ed311b2SBenjamin Herrenschmidt 18680262d9c8SHeiko Carstens memblock_dump(&memblock.memory); 18690262d9c8SHeiko Carstens memblock_dump(&memblock.reserved); 1870409efd4cSHeiko Carstens #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP 18710262d9c8SHeiko Carstens memblock_dump(&memblock.physmem); 1872409efd4cSHeiko Carstens #endif 18736ed311b2SBenjamin Herrenschmidt } 18746ed311b2SBenjamin Herrenschmidt 18751aadc056STejun Heo void __init memblock_allow_resize(void) 18766ed311b2SBenjamin Herrenschmidt { 1877142b45a7SBenjamin Herrenschmidt memblock_can_resize = 1; 18786ed311b2SBenjamin Herrenschmidt } 18796ed311b2SBenjamin Herrenschmidt 18806ed311b2SBenjamin Herrenschmidt static int __init early_memblock(char *p) 18816ed311b2SBenjamin Herrenschmidt { 18826ed311b2SBenjamin Herrenschmidt if (p && strstr(p, "debug")) 18836ed311b2SBenjamin Herrenschmidt memblock_debug = 1; 18846ed311b2SBenjamin Herrenschmidt return 0; 18856ed311b2SBenjamin Herrenschmidt } 18866ed311b2SBenjamin Herrenschmidt early_param("memblock", early_memblock); 18876ed311b2SBenjamin Herrenschmidt 1888bda49a81SMike Rapoport static void __init __free_pages_memory(unsigned long start, unsigned long end) 1889bda49a81SMike Rapoport { 1890bda49a81SMike Rapoport int order; 1891bda49a81SMike Rapoport 1892bda49a81SMike Rapoport while (start < end) { 1893bda49a81SMike Rapoport order = min(MAX_ORDER - 1UL, __ffs(start)); 1894bda49a81SMike Rapoport 1895bda49a81SMike Rapoport while (start + (1UL << order) > end) 1896bda49a81SMike Rapoport order--; 1897bda49a81SMike Rapoport 1898bda49a81SMike Rapoport memblock_free_pages(pfn_to_page(start), start, order); 1899bda49a81SMike Rapoport 1900bda49a81SMike Rapoport start += (1UL << order); 1901bda49a81SMike Rapoport } 1902bda49a81SMike Rapoport } 1903bda49a81SMike Rapoport 1904bda49a81SMike Rapoport static unsigned long __init __free_memory_core(phys_addr_t start, 1905bda49a81SMike Rapoport phys_addr_t end) 1906bda49a81SMike Rapoport { 1907bda49a81SMike Rapoport unsigned long start_pfn = PFN_UP(start); 1908bda49a81SMike Rapoport unsigned long end_pfn = min_t(unsigned long, 1909bda49a81SMike Rapoport PFN_DOWN(end), max_low_pfn); 1910bda49a81SMike Rapoport 1911bda49a81SMike Rapoport if (start_pfn >= end_pfn) 1912bda49a81SMike Rapoport return 0; 1913bda49a81SMike Rapoport 1914bda49a81SMike Rapoport __free_pages_memory(start_pfn, end_pfn); 1915bda49a81SMike Rapoport 1916bda49a81SMike Rapoport return end_pfn - start_pfn; 1917bda49a81SMike Rapoport } 1918bda49a81SMike Rapoport 1919bda49a81SMike Rapoport static unsigned long __init free_low_memory_core_early(void) 1920bda49a81SMike Rapoport { 1921bda49a81SMike Rapoport unsigned long count = 0; 1922bda49a81SMike Rapoport phys_addr_t start, end; 1923bda49a81SMike Rapoport u64 i; 1924bda49a81SMike Rapoport 1925bda49a81SMike Rapoport memblock_clear_hotplug(0, -1); 1926bda49a81SMike Rapoport 1927bda49a81SMike Rapoport for_each_reserved_mem_region(i, &start, &end) 1928bda49a81SMike Rapoport reserve_bootmem_region(start, end); 1929bda49a81SMike Rapoport 1930bda49a81SMike Rapoport /* 1931bda49a81SMike Rapoport * We need to use NUMA_NO_NODE instead of NODE_DATA(0)->node_id 1932bda49a81SMike Rapoport * because in some case like Node0 doesn't have RAM installed 1933bda49a81SMike Rapoport * low ram will be on Node1 1934bda49a81SMike Rapoport */ 1935bda49a81SMike Rapoport for_each_free_mem_range(i, NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, 1936bda49a81SMike Rapoport NULL) 1937bda49a81SMike Rapoport count += __free_memory_core(start, end); 1938bda49a81SMike Rapoport 1939bda49a81SMike Rapoport return count; 1940bda49a81SMike Rapoport } 1941bda49a81SMike Rapoport 1942bda49a81SMike Rapoport static int reset_managed_pages_done __initdata; 1943bda49a81SMike Rapoport 1944bda49a81SMike Rapoport void reset_node_managed_pages(pg_data_t *pgdat) 1945bda49a81SMike Rapoport { 1946bda49a81SMike Rapoport struct zone *z; 1947bda49a81SMike Rapoport 1948bda49a81SMike Rapoport for (z = pgdat->node_zones; z < pgdat->node_zones + MAX_NR_ZONES; z++) 19499705bea5SArun KS atomic_long_set(&z->managed_pages, 0); 1950bda49a81SMike Rapoport } 1951bda49a81SMike Rapoport 1952bda49a81SMike Rapoport void __init reset_all_zones_managed_pages(void) 1953bda49a81SMike Rapoport { 1954bda49a81SMike Rapoport struct pglist_data *pgdat; 1955bda49a81SMike Rapoport 1956bda49a81SMike Rapoport if (reset_managed_pages_done) 1957bda49a81SMike Rapoport return; 1958bda49a81SMike Rapoport 1959bda49a81SMike Rapoport for_each_online_pgdat(pgdat) 1960bda49a81SMike Rapoport reset_node_managed_pages(pgdat); 1961bda49a81SMike Rapoport 1962bda49a81SMike Rapoport reset_managed_pages_done = 1; 1963bda49a81SMike Rapoport } 1964bda49a81SMike Rapoport 1965bda49a81SMike Rapoport /** 1966bda49a81SMike Rapoport * memblock_free_all - release free pages to the buddy allocator 1967bda49a81SMike Rapoport * 1968bda49a81SMike Rapoport * Return: the number of pages actually released. 1969bda49a81SMike Rapoport */ 1970bda49a81SMike Rapoport unsigned long __init memblock_free_all(void) 1971bda49a81SMike Rapoport { 1972bda49a81SMike Rapoport unsigned long pages; 1973bda49a81SMike Rapoport 1974bda49a81SMike Rapoport reset_all_zones_managed_pages(); 1975bda49a81SMike Rapoport 1976bda49a81SMike Rapoport pages = free_low_memory_core_early(); 1977ca79b0c2SArun KS totalram_pages_add(pages); 1978bda49a81SMike Rapoport 1979bda49a81SMike Rapoport return pages; 1980bda49a81SMike Rapoport } 1981bda49a81SMike Rapoport 1982350e88baSMike Rapoport #if defined(CONFIG_DEBUG_FS) && defined(CONFIG_ARCH_KEEP_MEMBLOCK) 19836d03b885SBenjamin Herrenschmidt 19846d03b885SBenjamin Herrenschmidt static int memblock_debug_show(struct seq_file *m, void *private) 19856d03b885SBenjamin Herrenschmidt { 19866d03b885SBenjamin Herrenschmidt struct memblock_type *type = m->private; 19876d03b885SBenjamin Herrenschmidt struct memblock_region *reg; 19886d03b885SBenjamin Herrenschmidt int i; 19895d63f81cSMiles Chen phys_addr_t end; 19906d03b885SBenjamin Herrenschmidt 19916d03b885SBenjamin Herrenschmidt for (i = 0; i < type->cnt; i++) { 19926d03b885SBenjamin Herrenschmidt reg = &type->regions[i]; 19935d63f81cSMiles Chen end = reg->base + reg->size - 1; 19946d03b885SBenjamin Herrenschmidt 19955d63f81cSMiles Chen seq_printf(m, "%4d: ", i); 19965d63f81cSMiles Chen seq_printf(m, "%pa..%pa\n", ®->base, &end); 19976d03b885SBenjamin Herrenschmidt } 19986d03b885SBenjamin Herrenschmidt return 0; 19996d03b885SBenjamin Herrenschmidt } 20005ad35093SAndy Shevchenko DEFINE_SHOW_ATTRIBUTE(memblock_debug); 20016d03b885SBenjamin Herrenschmidt 20026d03b885SBenjamin Herrenschmidt static int __init memblock_init_debugfs(void) 20036d03b885SBenjamin Herrenschmidt { 20046d03b885SBenjamin Herrenschmidt struct dentry *root = debugfs_create_dir("memblock", NULL); 2005d9f7979cSGreg Kroah-Hartman 20060825a6f9SJoe Perches debugfs_create_file("memory", 0444, root, 20070825a6f9SJoe Perches &memblock.memory, &memblock_debug_fops); 20080825a6f9SJoe Perches debugfs_create_file("reserved", 0444, root, 20090825a6f9SJoe Perches &memblock.reserved, &memblock_debug_fops); 201070210ed9SPhilipp Hachtmann #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP 20110825a6f9SJoe Perches debugfs_create_file("physmem", 0444, root, 20120825a6f9SJoe Perches &memblock.physmem, &memblock_debug_fops); 201370210ed9SPhilipp Hachtmann #endif 20146d03b885SBenjamin Herrenschmidt 20156d03b885SBenjamin Herrenschmidt return 0; 20166d03b885SBenjamin Herrenschmidt } 20176d03b885SBenjamin Herrenschmidt __initcall(memblock_init_debugfs); 20186d03b885SBenjamin Herrenschmidt 20196d03b885SBenjamin Herrenschmidt #endif /* CONFIG_DEBUG_FS */ 2020