97a70e548b
Impact: fix crash during hibernation on 32-bit NUMA The NUMA code on x86_32 creates special memory mapping that allows each node's pgdat to be located in this node's memory. For this purpose it allocates a memory area at the end of each node's memory and maps this area so that it is accessible with virtual addresses belonging to low memory. As a result, if there is high memory, these NUMA-allocated areas are physically located in high memory, although they are mapped to low memory addresses. Our hibernation code does not take that into account and for this reason hibernation fails on all x86_32 systems with CONFIG_NUMA=y and with high memory present. Fix this by adding a special mapping for the NUMA-allocated memory areas to the temporary page tables created during the last phase of resume. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
138 lines
3.5 KiB
C
138 lines
3.5 KiB
C
/*
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* Written by Pat Gaughen (gone@us.ibm.com) Mar 2002
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*
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*/
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#ifndef _ASM_X86_MMZONE_32_H
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#define _ASM_X86_MMZONE_32_H
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#include <asm/smp.h>
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#ifdef CONFIG_NUMA
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extern struct pglist_data *node_data[];
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#define NODE_DATA(nid) (node_data[nid])
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#include <asm/numaq.h>
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/* summit or generic arch */
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#include <asm/srat.h>
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extern int get_memcfg_numa_flat(void);
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/*
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* This allows any one NUMA architecture to be compiled
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* for, and still fall back to the flat function if it
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* fails.
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*/
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static inline void get_memcfg_numa(void)
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{
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if (get_memcfg_numaq())
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return;
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if (get_memcfg_from_srat())
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return;
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get_memcfg_numa_flat();
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}
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extern int early_pfn_to_nid(unsigned long pfn);
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extern void resume_map_numa_kva(pgd_t *pgd);
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#else /* !CONFIG_NUMA */
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#define get_memcfg_numa get_memcfg_numa_flat
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static inline void resume_map_numa_kva(pgd_t *pgd) {}
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#endif /* CONFIG_NUMA */
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#ifdef CONFIG_DISCONTIGMEM
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/*
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* generic node memory support, the following assumptions apply:
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*
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* 1) memory comes in 64Mb contigious chunks which are either present or not
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* 2) we will not have more than 64Gb in total
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*
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* for now assume that 64Gb is max amount of RAM for whole system
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* 64Gb / 4096bytes/page = 16777216 pages
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*/
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#define MAX_NR_PAGES 16777216
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#define MAX_ELEMENTS 1024
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#define PAGES_PER_ELEMENT (MAX_NR_PAGES/MAX_ELEMENTS)
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extern s8 physnode_map[];
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static inline int pfn_to_nid(unsigned long pfn)
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{
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#ifdef CONFIG_NUMA
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return((int) physnode_map[(pfn) / PAGES_PER_ELEMENT]);
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#else
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return 0;
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#endif
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}
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/*
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* Following are macros that each numa implmentation must define.
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*/
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#define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn)
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#define node_end_pfn(nid) \
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({ \
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pg_data_t *__pgdat = NODE_DATA(nid); \
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__pgdat->node_start_pfn + __pgdat->node_spanned_pages; \
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})
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static inline int pfn_valid(int pfn)
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{
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int nid = pfn_to_nid(pfn);
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if (nid >= 0)
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return (pfn < node_end_pfn(nid));
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return 0;
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}
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#endif /* CONFIG_DISCONTIGMEM */
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#ifdef CONFIG_NEED_MULTIPLE_NODES
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/*
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* Following are macros that are specific to this numa platform.
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*/
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#define reserve_bootmem(addr, size, flags) \
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reserve_bootmem_node(NODE_DATA(0), (addr), (size), (flags))
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#define alloc_bootmem(x) \
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__alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
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#define alloc_bootmem_nopanic(x) \
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__alloc_bootmem_node_nopanic(NODE_DATA(0), (x), SMP_CACHE_BYTES, \
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__pa(MAX_DMA_ADDRESS))
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#define alloc_bootmem_low(x) \
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__alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, 0)
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#define alloc_bootmem_pages(x) \
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__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
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#define alloc_bootmem_pages_nopanic(x) \
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__alloc_bootmem_node_nopanic(NODE_DATA(0), (x), PAGE_SIZE, \
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__pa(MAX_DMA_ADDRESS))
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#define alloc_bootmem_low_pages(x) \
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__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0)
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#define alloc_bootmem_node(pgdat, x) \
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({ \
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struct pglist_data __maybe_unused \
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*__alloc_bootmem_node__pgdat = (pgdat); \
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__alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, \
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__pa(MAX_DMA_ADDRESS)); \
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})
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#define alloc_bootmem_pages_node(pgdat, x) \
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({ \
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struct pglist_data __maybe_unused \
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*__alloc_bootmem_node__pgdat = (pgdat); \
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__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, \
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__pa(MAX_DMA_ADDRESS)); \
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})
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#define alloc_bootmem_low_pages_node(pgdat, x) \
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({ \
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struct pglist_data __maybe_unused \
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*__alloc_bootmem_node__pgdat = (pgdat); \
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__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0); \
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})
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#endif /* CONFIG_NEED_MULTIPLE_NODES */
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#endif /* _ASM_X86_MMZONE_32_H */
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