unsigned long ret = 0;
if (min_pfn_mapped < max_pfn_mapped) {
- ret = memblock_find_in_range(
+ ret = memblock_phys_alloc_range(
+ PAGE_SIZE * num, PAGE_SIZE,
min_pfn_mapped << PAGE_SHIFT,
- max_pfn_mapped << PAGE_SHIFT,
- PAGE_SIZE * num , PAGE_SIZE);
+ max_pfn_mapped << PAGE_SHIFT);
}
- if (ret)
- memblock_reserve(ret, PAGE_SIZE * num);
- else if (can_use_brk_pgt)
+ if (!ret && can_use_brk_pgt)
ret = __pa(extend_brk(PAGE_SIZE * num, PAGE_SIZE));
if (!ret)
unsigned long addr;
unsigned long mapped_ram_size = 0;
- /* xen has big range in reserved near end of ram, skip it at first.*/
- addr = memblock_find_in_range(map_start, map_end, PMD_SIZE, PMD_SIZE);
+ /*
+ * Systems that have many reserved areas near top of the memory,
+ * e.g. QEMU with less than 1G RAM and EFI enabled, or Xen, will
+ * require lots of 4K mappings which may exhaust pgt_buf.
+ * Start with top-most PMD_SIZE range aligned at PMD_SIZE to ensure
+ * there is enough mapped memory that can be allocated from
+ * memblock.
+ */
+ addr = memblock_phys_alloc_range(PMD_SIZE, PMD_SIZE, map_start,
+ map_end);
+ memblock_free(addr, PMD_SIZE);
real_end = addr + PMD_SIZE;
/* step_size need to be small so pgt_buf from BRK could cover it */