diff options
Diffstat (limited to 'arch/sparc/kernel/smp_64.c')
| -rw-r--r-- | arch/sparc/kernel/smp_64.c | 53 |
1 files changed, 44 insertions, 9 deletions
diff --git a/arch/sparc/kernel/smp_64.c b/arch/sparc/kernel/smp_64.c index ff68373ce6d..aa36223497b 100644 --- a/arch/sparc/kernel/smp_64.c +++ b/arch/sparc/kernel/smp_64.c @@ -1420,7 +1420,7 @@ static void __init pcpu_free_bootmem(void *ptr, size_t size) free_bootmem(__pa(ptr), size); } -static int pcpu_cpu_distance(unsigned int from, unsigned int to) +static int __init pcpu_cpu_distance(unsigned int from, unsigned int to) { if (cpu_to_node(from) == cpu_to_node(to)) return LOCAL_DISTANCE; @@ -1428,18 +1428,53 @@ static int pcpu_cpu_distance(unsigned int from, unsigned int to) return REMOTE_DISTANCE; } +static void __init pcpu_populate_pte(unsigned long addr) +{ + pgd_t *pgd = pgd_offset_k(addr); + pud_t *pud; + pmd_t *pmd; + + pud = pud_offset(pgd, addr); + if (pud_none(*pud)) { + pmd_t *new; + + new = __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, PAGE_SIZE); + pud_populate(&init_mm, pud, new); + } + + pmd = pmd_offset(pud, addr); + if (!pmd_present(*pmd)) { + pte_t *new; + + new = __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, PAGE_SIZE); + pmd_populate_kernel(&init_mm, pmd, new); + } +} + void __init setup_per_cpu_areas(void) { unsigned long delta; unsigned int cpu; - int rc; - - rc = pcpu_embed_first_chunk(PERCPU_MODULE_RESERVE, - PERCPU_DYNAMIC_RESERVE, 4 << 20, - pcpu_cpu_distance, pcpu_alloc_bootmem, - pcpu_free_bootmem); - if (rc) - panic("failed to initialize first chunk (%d)", rc); + int rc = -EINVAL; + + if (pcpu_chosen_fc != PCPU_FC_PAGE) { + rc = pcpu_embed_first_chunk(PERCPU_MODULE_RESERVE, + PERCPU_DYNAMIC_RESERVE, 4 << 20, + pcpu_cpu_distance, + pcpu_alloc_bootmem, + pcpu_free_bootmem); + if (rc) + pr_warning("PERCPU: %s allocator failed (%d), " + "falling back to page size\n", + pcpu_fc_names[pcpu_chosen_fc], rc); + } + if (rc < 0) + rc = pcpu_page_first_chunk(PERCPU_MODULE_RESERVE, + pcpu_alloc_bootmem, + pcpu_free_bootmem, + pcpu_populate_pte); + if (rc < 0) + panic("cannot initialize percpu area (err=%d)", rc); delta = (unsigned long)pcpu_base_addr - (unsigned long)__per_cpu_start; for_each_possible_cpu(cpu) |