/** * numa_cleanup_meminfo - Cleanup a numa_meminfo * @mi: numa_meminfo to clean up * * Sanitize @mi by merging and removing unncessary memblks. Also check for * conflicts and clear unused memblks. * * RETURNS: * 0 on success, -errno on failure. */ int __init numa_cleanup_meminfo(struct numa_meminfo *mi) { const u64 low = 0; const u64 high = PFN_PHYS(max_pfn); int i, j, k; /* first, trim all entries */ for (i = 0; i < mi->nr_blks; i++) { struct numa_memblk *bi = &mi->blk[i]; /* make sure all blocks are inside the limits */ bi->start = max(bi->start, low); bi->end = min(bi->end, high); /* and there's no empty or non-exist block */ if (bi->start >= bi->end || !memblock_overlaps_region(&memblock.memory, bi->start, bi->end - bi->start)) numa_remove_memblk_from(i--, mi); } /* merge neighboring / overlapping entries */ for (i = 0; i < mi->nr_blks; i++) { struct numa_memblk *bi = &mi->blk[i]; for (j = i + 1; j < mi->nr_blks; j++) { struct numa_memblk *bj = &mi->blk[j]; u64 start, end; /* * See whether there are overlapping blocks. Whine * about but allow overlaps of the same nid. They * will be merged below. */ if (bi->end > bj->start && bi->start < bj->end) { if (bi->nid != bj->nid) { pr_err("NUMA: node %d [mem %#010Lx-%#010Lx] overlaps with node %d [mem %#010Lx-%#010Lx]\n", bi->nid, bi->start, bi->end - 1, bj->nid, bj->start, bj->end - 1); return -EINVAL; } pr_warning("NUMA: Warning: node %d [mem %#010Lx-%#010Lx] overlaps with itself [mem %#010Lx-%#010Lx]\n", bi->nid, bi->start, bi->end - 1, bj->start, bj->end - 1); } /* * Join together blocks on the same node, holes * between which don't overlap with memory on other * nodes. */ if (bi->nid != bj->nid) continue; start = min(bi->start, bj->start); end = max(bi->end, bj->end); for (k = 0; k < mi->nr_blks; k++) { struct numa_memblk *bk = &mi->blk[k]; if (bi->nid == bk->nid) continue; if (start < bk->end && end > bk->start) break; } if (k < mi->nr_blks) continue; printk(KERN_INFO "NUMA: Node %d [mem %#010Lx-%#010Lx] + [mem %#010Lx-%#010Lx] -> [mem %#010Lx-%#010Lx]\n", bi->nid, bi->start, bi->end - 1, bj->start, bj->end - 1, start, end - 1); bi->start = start; bi->end = end; numa_remove_memblk_from(j--, mi); } } /* clear unused ones */ for (i = mi->nr_blks; i < ARRAY_SIZE(mi->blk); i++) { mi->blk[i].start = mi->blk[i].end = 0; mi->blk[i].nid = NUMA_NO_NODE; } return 0; }
int __init_memblock memblock_is_region_reserved(phys_addr_t base, phys_addr_t size) { return memblock_overlaps_region(&memblock.reserved, base, size) >= 0; }
int memblock_is_region_reserved(u64 base, u64 size) { return memblock_overlaps_region(&memblock.reserved, base, size); }