diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/bootmem.c | 1 | ||||
| -rw-r--r-- | mm/internal.h | 12 | ||||
| -rw-r--r-- | mm/page_alloc.c | 2 | ||||
| -rw-r--r-- | mm/sparse.c | 37 |
4 files changed, 44 insertions, 8 deletions
diff --git a/mm/bootmem.c b/mm/bootmem.c index 8d9f60e06f62..9f4bbc5da73f 100644 --- a/mm/bootmem.c +++ b/mm/bootmem.c @@ -91,6 +91,7 @@ static unsigned long __init init_bootmem_core(pg_data_t *pgdat, bootmem_data_t *bdata = pgdat->bdata; unsigned long mapsize; + mminit_validate_memmodel_limits(&start, &end); bdata->node_bootmem_map = phys_to_virt(PFN_PHYS(mapstart)); bdata->node_boot_start = PFN_PHYS(start); bdata->node_low_pfn = end; diff --git a/mm/internal.h b/mm/internal.h index 7a4a2885dc8e..5d17f3efac41 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -98,4 +98,16 @@ static inline void mminit_verify_page_links(struct page *page, { } #endif /* CONFIG_DEBUG_MEMORY_INIT */ + +/* mminit_validate_memmodel_limits is independent of CONFIG_DEBUG_MEMORY_INIT */ +#if defined(CONFIG_SPARSEMEM) +extern void mminit_validate_memmodel_limits(unsigned long *start_pfn, + unsigned long *end_pfn); +#else +static inline void mminit_validate_memmodel_limits(unsigned long *start_pfn, + unsigned long *end_pfn) +{ +} +#endif /* CONFIG_SPARSEMEM */ + #endif diff --git a/mm/page_alloc.c b/mm/page_alloc.c index acab6ad326df..0adb66e711e6 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -3536,6 +3536,8 @@ void __init add_active_range(unsigned int nid, unsigned long start_pfn, nid, start_pfn, end_pfn, nr_nodemap_entries, MAX_ACTIVE_REGIONS); + mminit_validate_memmodel_limits(&start_pfn, &end_pfn); + /* Merge with existing active regions if possible */ for (i = 0; i < nr_nodemap_entries; i++) { if (early_node_map[i].nid != nid) diff --git a/mm/sparse.c b/mm/sparse.c index 36511c7b5e2c..7a3650923d9a 100644 --- a/mm/sparse.c +++ b/mm/sparse.c @@ -12,6 +12,7 @@ #include <asm/dma.h> #include <asm/pgalloc.h> #include <asm/pgtable.h> +#include "internal.h" /* * Permanent SPARSEMEM data: @@ -147,22 +148,41 @@ static inline int sparse_early_nid(struct mem_section *section) return (section->section_mem_map >> SECTION_NID_SHIFT); } -/* Record a memory area against a node. */ -void __init memory_present(int nid, unsigned long start, unsigned long end) +/* Validate the physical addressing limitations of the model */ +void __meminit mminit_validate_memmodel_limits(unsigned long *start_pfn, + unsigned long *end_pfn) { - unsigned long max_arch_pfn = 1UL << (MAX_PHYSMEM_BITS-PAGE_SHIFT); - unsigned long pfn; + unsigned long max_sparsemem_pfn = 1UL << (MAX_PHYSMEM_BITS-PAGE_SHIFT); /* * Sanity checks - do not allow an architecture to pass * in larger pfns than the maximum scope of sparsemem: */ - if (start >= max_arch_pfn) - return; - if (end >= max_arch_pfn) - end = max_arch_pfn; + if (*start_pfn > max_sparsemem_pfn) { + mminit_dprintk(MMINIT_WARNING, "pfnvalidation", + "Start of range %lu -> %lu exceeds SPARSEMEM max %lu\n", + *start_pfn, *end_pfn, max_sparsemem_pfn); + WARN_ON_ONCE(1); + *start_pfn = max_sparsemem_pfn; + *end_pfn = max_sparsemem_pfn; + } + + if (*end_pfn > max_sparsemem_pfn) { + mminit_dprintk(MMINIT_WARNING, "pfnvalidation", + "End of range %lu -> %lu exceeds SPARSEMEM max %lu\n", + *start_pfn, *end_pfn, max_sparsemem_pfn); + WARN_ON_ONCE(1); + *end_pfn = max_sparsemem_pfn; + } +} + +/* Record a memory area against a node. */ +void __init memory_present(int nid, unsigned long start, unsigned long end) +{ + unsigned long pfn; start &= PAGE_SECTION_MASK; + mminit_validate_memmodel_limits(&start, &end); for (pfn = start; pfn < end; pfn += PAGES_PER_SECTION) { unsigned long section = pfn_to_section_nr(pfn); struct mem_section *ms; @@ -187,6 +207,7 @@ unsigned long __init node_memmap_size_bytes(int nid, unsigned long start_pfn, unsigned long pfn; unsigned long nr_pages = 0; + mminit_validate_memmodel_limits(&start_pfn, &end_pfn); for (pfn = start_pfn; pfn < end_pfn; pfn += PAGES_PER_SECTION) { if (nid != early_pfn_to_nid(pfn)) continue; |