![Mike Rapoport](/assets/img/avatar_default.png)
Add panic() calls if memblock_alloc*() returns NULL. Most of the changes are simply addition of if(!ptr) panic(); statements after the calls to memblock_alloc*() variants. Exceptions are create_mem_map_page_table() and ia64_log_init() that were slightly refactored to accommodate the change. Link: http://lkml.kernel.org/r/1548057848-15136-15-git-send-email-rppt@linux.ibm.com Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Christophe Leroy <christophe.leroy@c-s.fr> Cc: Christoph Hellwig <hch@lst.de> Cc: "David S. Miller" <davem@davemloft.net> Cc: Dennis Zhou <dennis@kernel.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Greentime Hu <green.hu@gmail.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Guan Xuetao <gxt@pku.edu.cn> Cc: Guo Ren <guoren@kernel.org> Cc: Guo Ren <ren_guo@c-sky.com> [c-sky] Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Juergen Gross <jgross@suse.com> [Xen] Cc: Mark Salter <msalter@redhat.com> Cc: Matt Turner <mattst88@gmail.com> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michal Simek <monstr@monstr.eu> Cc: Paul Burton <paul.burton@mips.com> Cc: Petr Mladek <pmladek@suse.com> Cc: Richard Weinberger <richard@nod.at> Cc: Rich Felker <dalias@libc.org> Cc: Rob Herring <robh+dt@kernel.org> Cc: Rob Herring <robh@kernel.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Stafford Horne <shorne@gmail.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
671 lines
18 KiB
C
671 lines
18 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2000, 2003 Silicon Graphics, Inc. All rights reserved.
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* Copyright (c) 2001 Intel Corp.
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* Copyright (c) 2001 Tony Luck <tony.luck@intel.com>
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* Copyright (c) 2002 NEC Corp.
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* Copyright (c) 2002 Kimio Suganuma <k-suganuma@da.jp.nec.com>
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* Copyright (c) 2004 Silicon Graphics, Inc
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* Russ Anderson <rja@sgi.com>
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* Jesse Barnes <jbarnes@sgi.com>
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* Jack Steiner <steiner@sgi.com>
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*/
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/*
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* Platform initialization for Discontig Memory
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*/
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/nmi.h>
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#include <linux/swap.h>
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#include <linux/memblock.h>
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#include <linux/acpi.h>
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#include <linux/efi.h>
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#include <linux/nodemask.h>
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#include <linux/slab.h>
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#include <asm/pgalloc.h>
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#include <asm/tlb.h>
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#include <asm/meminit.h>
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#include <asm/numa.h>
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#include <asm/sections.h>
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/*
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* Track per-node information needed to setup the boot memory allocator, the
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* per-node areas, and the real VM.
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*/
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struct early_node_data {
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struct ia64_node_data *node_data;
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unsigned long pernode_addr;
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unsigned long pernode_size;
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unsigned long min_pfn;
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unsigned long max_pfn;
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};
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static struct early_node_data mem_data[MAX_NUMNODES] __initdata;
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static nodemask_t memory_less_mask __initdata;
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pg_data_t *pgdat_list[MAX_NUMNODES];
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/*
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* To prevent cache aliasing effects, align per-node structures so that they
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* start at addresses that are strided by node number.
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*/
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#define MAX_NODE_ALIGN_OFFSET (32 * 1024 * 1024)
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#define NODEDATA_ALIGN(addr, node) \
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((((addr) + 1024*1024-1) & ~(1024*1024-1)) + \
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(((node)*PERCPU_PAGE_SIZE) & (MAX_NODE_ALIGN_OFFSET - 1)))
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/**
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* build_node_maps - callback to setup mem_data structs for each node
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* @start: physical start of range
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* @len: length of range
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* @node: node where this range resides
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*
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* Detect extents of each piece of memory that we wish to
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* treat as a virtually contiguous block (i.e. each node). Each such block
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* must start on an %IA64_GRANULE_SIZE boundary, so we round the address down
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* if necessary. Any non-existent pages will simply be part of the virtual
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* memmap.
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*/
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static int __init build_node_maps(unsigned long start, unsigned long len,
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int node)
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{
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unsigned long spfn, epfn, end = start + len;
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epfn = GRANULEROUNDUP(end) >> PAGE_SHIFT;
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spfn = GRANULEROUNDDOWN(start) >> PAGE_SHIFT;
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if (!mem_data[node].min_pfn) {
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mem_data[node].min_pfn = spfn;
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mem_data[node].max_pfn = epfn;
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} else {
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mem_data[node].min_pfn = min(spfn, mem_data[node].min_pfn);
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mem_data[node].max_pfn = max(epfn, mem_data[node].max_pfn);
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}
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return 0;
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}
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/**
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* early_nr_cpus_node - return number of cpus on a given node
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* @node: node to check
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*
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* Count the number of cpus on @node. We can't use nr_cpus_node() yet because
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* acpi_boot_init() (which builds the node_to_cpu_mask array) hasn't been
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* called yet. Note that node 0 will also count all non-existent cpus.
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*/
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static int __meminit early_nr_cpus_node(int node)
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{
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int cpu, n = 0;
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for_each_possible_early_cpu(cpu)
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if (node == node_cpuid[cpu].nid)
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n++;
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return n;
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}
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/**
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* compute_pernodesize - compute size of pernode data
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* @node: the node id.
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*/
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static unsigned long __meminit compute_pernodesize(int node)
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{
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unsigned long pernodesize = 0, cpus;
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cpus = early_nr_cpus_node(node);
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pernodesize += PERCPU_PAGE_SIZE * cpus;
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pernodesize += node * L1_CACHE_BYTES;
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pernodesize += L1_CACHE_ALIGN(sizeof(pg_data_t));
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pernodesize += L1_CACHE_ALIGN(sizeof(struct ia64_node_data));
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pernodesize += L1_CACHE_ALIGN(sizeof(pg_data_t));
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pernodesize = PAGE_ALIGN(pernodesize);
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return pernodesize;
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}
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/**
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* per_cpu_node_setup - setup per-cpu areas on each node
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* @cpu_data: per-cpu area on this node
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* @node: node to setup
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*
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* Copy the static per-cpu data into the region we just set aside and then
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* setup __per_cpu_offset for each CPU on this node. Return a pointer to
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* the end of the area.
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*/
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static void *per_cpu_node_setup(void *cpu_data, int node)
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{
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#ifdef CONFIG_SMP
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int cpu;
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for_each_possible_early_cpu(cpu) {
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void *src = cpu == 0 ? __cpu0_per_cpu : __phys_per_cpu_start;
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if (node != node_cpuid[cpu].nid)
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continue;
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memcpy(__va(cpu_data), src, __per_cpu_end - __per_cpu_start);
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__per_cpu_offset[cpu] = (char *)__va(cpu_data) -
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__per_cpu_start;
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/*
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* percpu area for cpu0 is moved from the __init area
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* which is setup by head.S and used till this point.
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* Update ar.k3. This move is ensures that percpu
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* area for cpu0 is on the correct node and its
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* virtual address isn't insanely far from other
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* percpu areas which is important for congruent
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* percpu allocator.
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*/
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if (cpu == 0)
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ia64_set_kr(IA64_KR_PER_CPU_DATA,
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(unsigned long)cpu_data -
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(unsigned long)__per_cpu_start);
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cpu_data += PERCPU_PAGE_SIZE;
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}
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#endif
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return cpu_data;
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}
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#ifdef CONFIG_SMP
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/**
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* setup_per_cpu_areas - setup percpu areas
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*
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* Arch code has already allocated and initialized percpu areas. All
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* this function has to do is to teach the determined layout to the
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* dynamic percpu allocator, which happens to be more complex than
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* creating whole new ones using helpers.
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*/
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void __init setup_per_cpu_areas(void)
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{
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struct pcpu_alloc_info *ai;
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struct pcpu_group_info *uninitialized_var(gi);
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unsigned int *cpu_map;
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void *base;
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unsigned long base_offset;
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unsigned int cpu;
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ssize_t static_size, reserved_size, dyn_size;
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int node, prev_node, unit, nr_units, rc;
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ai = pcpu_alloc_alloc_info(MAX_NUMNODES, nr_cpu_ids);
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if (!ai)
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panic("failed to allocate pcpu_alloc_info");
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cpu_map = ai->groups[0].cpu_map;
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/* determine base */
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base = (void *)ULONG_MAX;
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for_each_possible_cpu(cpu)
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base = min(base,
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(void *)(__per_cpu_offset[cpu] + __per_cpu_start));
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base_offset = (void *)__per_cpu_start - base;
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/* build cpu_map, units are grouped by node */
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unit = 0;
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for_each_node(node)
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for_each_possible_cpu(cpu)
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if (node == node_cpuid[cpu].nid)
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cpu_map[unit++] = cpu;
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nr_units = unit;
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/* set basic parameters */
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static_size = __per_cpu_end - __per_cpu_start;
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reserved_size = PERCPU_MODULE_RESERVE;
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dyn_size = PERCPU_PAGE_SIZE - static_size - reserved_size;
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if (dyn_size < 0)
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panic("percpu area overflow static=%zd reserved=%zd\n",
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static_size, reserved_size);
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ai->static_size = static_size;
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ai->reserved_size = reserved_size;
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ai->dyn_size = dyn_size;
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ai->unit_size = PERCPU_PAGE_SIZE;
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ai->atom_size = PAGE_SIZE;
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ai->alloc_size = PERCPU_PAGE_SIZE;
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/*
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* CPUs are put into groups according to node. Walk cpu_map
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* and create new groups at node boundaries.
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*/
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prev_node = NUMA_NO_NODE;
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ai->nr_groups = 0;
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for (unit = 0; unit < nr_units; unit++) {
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cpu = cpu_map[unit];
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node = node_cpuid[cpu].nid;
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if (node == prev_node) {
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gi->nr_units++;
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continue;
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}
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prev_node = node;
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gi = &ai->groups[ai->nr_groups++];
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gi->nr_units = 1;
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gi->base_offset = __per_cpu_offset[cpu] + base_offset;
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gi->cpu_map = &cpu_map[unit];
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}
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rc = pcpu_setup_first_chunk(ai, base);
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if (rc)
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panic("failed to setup percpu area (err=%d)", rc);
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pcpu_free_alloc_info(ai);
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}
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#endif
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/**
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* fill_pernode - initialize pernode data.
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* @node: the node id.
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* @pernode: physical address of pernode data
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* @pernodesize: size of the pernode data
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*/
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static void __init fill_pernode(int node, unsigned long pernode,
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unsigned long pernodesize)
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{
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void *cpu_data;
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int cpus = early_nr_cpus_node(node);
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mem_data[node].pernode_addr = pernode;
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mem_data[node].pernode_size = pernodesize;
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memset(__va(pernode), 0, pernodesize);
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cpu_data = (void *)pernode;
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pernode += PERCPU_PAGE_SIZE * cpus;
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pernode += node * L1_CACHE_BYTES;
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pgdat_list[node] = __va(pernode);
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pernode += L1_CACHE_ALIGN(sizeof(pg_data_t));
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mem_data[node].node_data = __va(pernode);
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pernode += L1_CACHE_ALIGN(sizeof(struct ia64_node_data));
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pernode += L1_CACHE_ALIGN(sizeof(pg_data_t));
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cpu_data = per_cpu_node_setup(cpu_data, node);
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return;
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}
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/**
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* find_pernode_space - allocate memory for memory map and per-node structures
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* @start: physical start of range
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* @len: length of range
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* @node: node where this range resides
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*
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* This routine reserves space for the per-cpu data struct, the list of
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* pg_data_ts and the per-node data struct. Each node will have something like
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* the following in the first chunk of addr. space large enough to hold it.
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*
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* ________________________
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* | |
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* |~~~~~~~~~~~~~~~~~~~~~~~~| <-- NODEDATA_ALIGN(start, node) for the first
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* | PERCPU_PAGE_SIZE * | start and length big enough
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* | cpus_on_this_node | Node 0 will also have entries for all non-existent cpus.
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* |------------------------|
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* | local pg_data_t * |
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* |------------------------|
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* | local ia64_node_data |
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* |------------------------|
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* | ??? |
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* |________________________|
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*
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* Once this space has been set aside, the bootmem maps are initialized. We
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* could probably move the allocation of the per-cpu and ia64_node_data space
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* outside of this function and use alloc_bootmem_node(), but doing it here
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* is straightforward and we get the alignments we want so...
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*/
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static int __init find_pernode_space(unsigned long start, unsigned long len,
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int node)
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{
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unsigned long spfn, epfn;
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unsigned long pernodesize = 0, pernode;
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spfn = start >> PAGE_SHIFT;
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epfn = (start + len) >> PAGE_SHIFT;
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/*
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* Make sure this memory falls within this node's usable memory
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* since we may have thrown some away in build_maps().
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*/
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if (spfn < mem_data[node].min_pfn || epfn > mem_data[node].max_pfn)
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return 0;
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/* Don't setup this node's local space twice... */
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if (mem_data[node].pernode_addr)
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return 0;
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/*
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* Calculate total size needed, incl. what's necessary
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* for good alignment and alias prevention.
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*/
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pernodesize = compute_pernodesize(node);
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pernode = NODEDATA_ALIGN(start, node);
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/* Is this range big enough for what we want to store here? */
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if (start + len > (pernode + pernodesize))
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fill_pernode(node, pernode, pernodesize);
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return 0;
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}
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/**
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* reserve_pernode_space - reserve memory for per-node space
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*
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* Reserve the space used by the bootmem maps & per-node space in the boot
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* allocator so that when we actually create the real mem maps we don't
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* use their memory.
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*/
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static void __init reserve_pernode_space(void)
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{
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unsigned long base, size;
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int node;
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for_each_online_node(node) {
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if (node_isset(node, memory_less_mask))
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continue;
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/* Now the per-node space */
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size = mem_data[node].pernode_size;
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base = __pa(mem_data[node].pernode_addr);
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memblock_reserve(base, size);
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}
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}
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static void __meminit scatter_node_data(void)
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{
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pg_data_t **dst;
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int node;
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/*
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* for_each_online_node() can't be used at here.
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* node_online_map is not set for hot-added nodes at this time,
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* because we are halfway through initialization of the new node's
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* structures. If for_each_online_node() is used, a new node's
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* pg_data_ptrs will be not initialized. Instead of using it,
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* pgdat_list[] is checked.
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*/
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for_each_node(node) {
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if (pgdat_list[node]) {
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dst = LOCAL_DATA_ADDR(pgdat_list[node])->pg_data_ptrs;
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memcpy(dst, pgdat_list, sizeof(pgdat_list));
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}
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}
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}
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/**
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* initialize_pernode_data - fixup per-cpu & per-node pointers
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*
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* Each node's per-node area has a copy of the global pg_data_t list, so
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* we copy that to each node here, as well as setting the per-cpu pointer
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* to the local node data structure. The active_cpus field of the per-node
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* structure gets setup by the platform_cpu_init() function later.
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*/
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static void __init initialize_pernode_data(void)
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{
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int cpu, node;
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scatter_node_data();
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#ifdef CONFIG_SMP
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/* Set the node_data pointer for each per-cpu struct */
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for_each_possible_early_cpu(cpu) {
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node = node_cpuid[cpu].nid;
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per_cpu(ia64_cpu_info, cpu).node_data =
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mem_data[node].node_data;
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}
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#else
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{
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struct cpuinfo_ia64 *cpu0_cpu_info;
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cpu = 0;
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node = node_cpuid[cpu].nid;
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cpu0_cpu_info = (struct cpuinfo_ia64 *)(__phys_per_cpu_start +
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((char *)&ia64_cpu_info - __per_cpu_start));
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cpu0_cpu_info->node_data = mem_data[node].node_data;
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}
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#endif /* CONFIG_SMP */
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}
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/**
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* memory_less_node_alloc - * attempt to allocate memory on the best NUMA slit
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* node but fall back to any other node when __alloc_bootmem_node fails
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* for best.
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* @nid: node id
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* @pernodesize: size of this node's pernode data
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*/
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static void __init *memory_less_node_alloc(int nid, unsigned long pernodesize)
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{
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void *ptr = NULL;
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u8 best = 0xff;
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int bestnode = NUMA_NO_NODE, node, anynode = 0;
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for_each_online_node(node) {
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if (node_isset(node, memory_less_mask))
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continue;
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else if (node_distance(nid, node) < best) {
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best = node_distance(nid, node);
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bestnode = node;
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}
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anynode = node;
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}
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if (bestnode == NUMA_NO_NODE)
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bestnode = anynode;
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ptr = memblock_alloc_try_nid(pernodesize, PERCPU_PAGE_SIZE,
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__pa(MAX_DMA_ADDRESS),
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MEMBLOCK_ALLOC_ACCESSIBLE,
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bestnode);
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if (!ptr)
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panic("%s: Failed to allocate %lu bytes align=0x%lx nid=%d from=%lx\n",
|
|
__func__, pernodesize, PERCPU_PAGE_SIZE, bestnode,
|
|
__pa(MAX_DMA_ADDRESS));
|
|
|
|
return ptr;
|
|
}
|
|
|
|
/**
|
|
* memory_less_nodes - allocate and initialize CPU only nodes pernode
|
|
* information.
|
|
*/
|
|
static void __init memory_less_nodes(void)
|
|
{
|
|
unsigned long pernodesize;
|
|
void *pernode;
|
|
int node;
|
|
|
|
for_each_node_mask(node, memory_less_mask) {
|
|
pernodesize = compute_pernodesize(node);
|
|
pernode = memory_less_node_alloc(node, pernodesize);
|
|
fill_pernode(node, __pa(pernode), pernodesize);
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* find_memory - walk the EFI memory map and setup the bootmem allocator
|
|
*
|
|
* Called early in boot to setup the bootmem allocator, and to
|
|
* allocate the per-cpu and per-node structures.
|
|
*/
|
|
void __init find_memory(void)
|
|
{
|
|
int node;
|
|
|
|
reserve_memory();
|
|
efi_memmap_walk(filter_memory, register_active_ranges);
|
|
|
|
if (num_online_nodes() == 0) {
|
|
printk(KERN_ERR "node info missing!\n");
|
|
node_set_online(0);
|
|
}
|
|
|
|
nodes_or(memory_less_mask, memory_less_mask, node_online_map);
|
|
min_low_pfn = -1;
|
|
max_low_pfn = 0;
|
|
|
|
/* These actually end up getting called by call_pernode_memory() */
|
|
efi_memmap_walk(filter_rsvd_memory, build_node_maps);
|
|
efi_memmap_walk(filter_rsvd_memory, find_pernode_space);
|
|
efi_memmap_walk(find_max_min_low_pfn, NULL);
|
|
|
|
for_each_online_node(node)
|
|
if (mem_data[node].min_pfn)
|
|
node_clear(node, memory_less_mask);
|
|
|
|
reserve_pernode_space();
|
|
memory_less_nodes();
|
|
initialize_pernode_data();
|
|
|
|
max_pfn = max_low_pfn;
|
|
|
|
find_initrd();
|
|
}
|
|
|
|
#ifdef CONFIG_SMP
|
|
/**
|
|
* per_cpu_init - setup per-cpu variables
|
|
*
|
|
* find_pernode_space() does most of this already, we just need to set
|
|
* local_per_cpu_offset
|
|
*/
|
|
void *per_cpu_init(void)
|
|
{
|
|
int cpu;
|
|
static int first_time = 1;
|
|
|
|
if (first_time) {
|
|
first_time = 0;
|
|
for_each_possible_early_cpu(cpu)
|
|
per_cpu(local_per_cpu_offset, cpu) = __per_cpu_offset[cpu];
|
|
}
|
|
|
|
return __per_cpu_start + __per_cpu_offset[smp_processor_id()];
|
|
}
|
|
#endif /* CONFIG_SMP */
|
|
|
|
/**
|
|
* call_pernode_memory - use SRAT to call callback functions with node info
|
|
* @start: physical start of range
|
|
* @len: length of range
|
|
* @arg: function to call for each range
|
|
*
|
|
* efi_memmap_walk() knows nothing about layout of memory across nodes. Find
|
|
* out to which node a block of memory belongs. Ignore memory that we cannot
|
|
* identify, and split blocks that run across multiple nodes.
|
|
*
|
|
* Take this opportunity to round the start address up and the end address
|
|
* down to page boundaries.
|
|
*/
|
|
void call_pernode_memory(unsigned long start, unsigned long len, void *arg)
|
|
{
|
|
unsigned long rs, re, end = start + len;
|
|
void (*func)(unsigned long, unsigned long, int);
|
|
int i;
|
|
|
|
start = PAGE_ALIGN(start);
|
|
end &= PAGE_MASK;
|
|
if (start >= end)
|
|
return;
|
|
|
|
func = arg;
|
|
|
|
if (!num_node_memblks) {
|
|
/* No SRAT table, so assume one node (node 0) */
|
|
if (start < end)
|
|
(*func)(start, end - start, 0);
|
|
return;
|
|
}
|
|
|
|
for (i = 0; i < num_node_memblks; i++) {
|
|
rs = max(start, node_memblk[i].start_paddr);
|
|
re = min(end, node_memblk[i].start_paddr +
|
|
node_memblk[i].size);
|
|
|
|
if (rs < re)
|
|
(*func)(rs, re - rs, node_memblk[i].nid);
|
|
|
|
if (re == end)
|
|
break;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* paging_init - setup page tables
|
|
*
|
|
* paging_init() sets up the page tables for each node of the system and frees
|
|
* the bootmem allocator memory for general use.
|
|
*/
|
|
void __init paging_init(void)
|
|
{
|
|
unsigned long max_dma;
|
|
unsigned long pfn_offset = 0;
|
|
unsigned long max_pfn = 0;
|
|
int node;
|
|
unsigned long max_zone_pfns[MAX_NR_ZONES];
|
|
|
|
max_dma = virt_to_phys((void *) MAX_DMA_ADDRESS) >> PAGE_SHIFT;
|
|
|
|
sparse_memory_present_with_active_regions(MAX_NUMNODES);
|
|
sparse_init();
|
|
|
|
#ifdef CONFIG_VIRTUAL_MEM_MAP
|
|
VMALLOC_END -= PAGE_ALIGN(ALIGN(max_low_pfn, MAX_ORDER_NR_PAGES) *
|
|
sizeof(struct page));
|
|
vmem_map = (struct page *) VMALLOC_END;
|
|
efi_memmap_walk(create_mem_map_page_table, NULL);
|
|
printk("Virtual mem_map starts at 0x%p\n", vmem_map);
|
|
#endif
|
|
|
|
for_each_online_node(node) {
|
|
pfn_offset = mem_data[node].min_pfn;
|
|
|
|
#ifdef CONFIG_VIRTUAL_MEM_MAP
|
|
NODE_DATA(node)->node_mem_map = vmem_map + pfn_offset;
|
|
#endif
|
|
if (mem_data[node].max_pfn > max_pfn)
|
|
max_pfn = mem_data[node].max_pfn;
|
|
}
|
|
|
|
memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
|
|
#ifdef CONFIG_ZONE_DMA32
|
|
max_zone_pfns[ZONE_DMA32] = max_dma;
|
|
#endif
|
|
max_zone_pfns[ZONE_NORMAL] = max_pfn;
|
|
free_area_init_nodes(max_zone_pfns);
|
|
|
|
zero_page_memmap_ptr = virt_to_page(ia64_imva(empty_zero_page));
|
|
}
|
|
|
|
#ifdef CONFIG_MEMORY_HOTPLUG
|
|
pg_data_t *arch_alloc_nodedata(int nid)
|
|
{
|
|
unsigned long size = compute_pernodesize(nid);
|
|
|
|
return kzalloc(size, GFP_KERNEL);
|
|
}
|
|
|
|
void arch_free_nodedata(pg_data_t *pgdat)
|
|
{
|
|
kfree(pgdat);
|
|
}
|
|
|
|
void arch_refresh_nodedata(int update_node, pg_data_t *update_pgdat)
|
|
{
|
|
pgdat_list[update_node] = update_pgdat;
|
|
scatter_node_data();
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_SPARSEMEM_VMEMMAP
|
|
int __meminit vmemmap_populate(unsigned long start, unsigned long end, int node,
|
|
struct vmem_altmap *altmap)
|
|
{
|
|
return vmemmap_populate_basepages(start, end, node);
|
|
}
|
|
|
|
void vmemmap_free(unsigned long start, unsigned long end,
|
|
struct vmem_altmap *altmap)
|
|
{
|
|
}
|
|
#endif
|