diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/kernel/paca.c | 45 | ||||
| -rw-r--r-- | arch/powerpc/kernel/setup_64.c | 4 |
2 files changed, 43 insertions, 6 deletions
diff --git a/arch/powerpc/kernel/paca.c b/arch/powerpc/kernel/paca.c index a186911791c7..0f7e2be23fa2 100644 --- a/arch/powerpc/kernel/paca.c +++ b/arch/powerpc/kernel/paca.c @@ -20,6 +20,41 @@ #include "setup.h" +#ifndef CONFIG_SMP +#define boot_cpuid 0 +#endif + +static void *__init alloc_paca_data(unsigned long size, unsigned long align, + unsigned long limit, int cpu) +{ + unsigned long pa; + int nid; + + /* + * boot_cpuid paca is allocated very early before cpu_to_node is up. + * Set bottom-up mode, because the boot CPU should be on node-0, + * which will put its paca in the right place. + */ + if (cpu == boot_cpuid) { + nid = -1; + memblock_set_bottom_up(true); + } else { + nid = early_cpu_to_node(cpu); + } + + pa = memblock_alloc_base_nid(size, align, limit, nid, MEMBLOCK_NONE); + if (!pa) { + pa = memblock_alloc_base(size, align, limit); + if (!pa) + panic("cannot allocate paca data"); + } + + if (cpu == boot_cpuid) + memblock_set_bottom_up(false); + + return __va(pa); +} + #ifdef CONFIG_PPC_PSERIES /* @@ -52,7 +87,7 @@ static struct lppaca * __init new_lppaca(int cpu, unsigned long limit) if (early_cpu_has_feature(CPU_FTR_HVMODE)) return NULL; - lp = __va(memblock_alloc_base(size, 0x400, limit)); + lp = alloc_paca_data(size, 0x400, limit, cpu); init_lppaca(lp); return lp; @@ -82,7 +117,7 @@ static struct slb_shadow * __init new_slb_shadow(int cpu, unsigned long limit) return NULL; } - s = __va(memblock_alloc_base(sizeof(*s), L1_CACHE_BYTES, limit)); + s = alloc_paca_data(sizeof(*s), L1_CACHE_BYTES, limit, cpu); memset(s, 0, sizeof(*s)); s->persistent = cpu_to_be32(SLB_NUM_BOLTED); @@ -170,7 +205,6 @@ void __init allocate_paca_ptrs(void) void __init allocate_paca(int cpu) { u64 limit; - unsigned long pa; struct paca_struct *paca; BUG_ON(cpu >= paca_nr_cpu_ids); @@ -185,9 +219,8 @@ void __init allocate_paca(int cpu) limit = ppc64_rma_size; #endif - pa = memblock_alloc_base(sizeof(struct paca_struct), - L1_CACHE_BYTES, limit); - paca = __va(pa); + paca = alloc_paca_data(sizeof(struct paca_struct), L1_CACHE_BYTES, + limit, cpu); paca_ptrs[cpu] = paca; memset(paca, 0, sizeof(struct paca_struct)); diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c index dde34d35d1e7..02fa358982e6 100644 --- a/arch/powerpc/kernel/setup_64.c +++ b/arch/powerpc/kernel/setup_64.c @@ -312,6 +312,10 @@ void __init early_setup(unsigned long dt_ptr) early_init_devtree(__va(dt_ptr)); /* Now we know the logical id of our boot cpu, setup the paca. */ + if (boot_cpuid != 0) { + /* Poison paca_ptrs[0] again if it's not the boot cpu */ + memset(&paca_ptrs[0], 0x88, sizeof(paca_ptrs[0])); + } setup_paca(paca_ptrs[boot_cpuid]); fixup_boot_paca(); |