Merge commit 'v3.14' into next

[firefly-linux-kernel-4.4.55.git] / arch / powerpc / kernel / paca.c

diff --git a/arch/powerpc/kernel/paca.c b/arch/powerpc/kernel/paca.c
index 0620eaaaad45b419c70475485a9d052c0ddbe246..bf0aada02fe4798c39e60d84653bef3a51ee4f83 100644 (file)
--- a/arch/powerpc/kernel/paca.c
+++ b/arch/powerpc/kernel/paca.c
@@ -99,12 +99,28 @@ static inline void free_lppacas(void) { }
  * 3 persistent SLBs are registered here.  The buffer will be zero
  * initially, hence will all be invaild until we actually write them.
  */
-struct slb_shadow slb_shadow[] __cacheline_aligned = {
-       [0 ... (NR_CPUS-1)] = {
-               .persistent = cpu_to_be32(SLB_NUM_BOLTED),
-               .buffer_length = cpu_to_be32(sizeof(struct slb_shadow)),
-       },
-};
+static struct slb_shadow *slb_shadow;
+
+static void __init allocate_slb_shadows(int nr_cpus, int limit)
+{
+       int size = PAGE_ALIGN(sizeof(struct slb_shadow) * nr_cpus);
+       slb_shadow = __va(memblock_alloc_base(size, PAGE_SIZE, limit));
+       memset(slb_shadow, 0, size);
+}
+
+static struct slb_shadow * __init init_slb_shadow(int cpu)
+{
+       struct slb_shadow *s = &slb_shadow[cpu];
+
+       s->persistent = cpu_to_be32(SLB_NUM_BOLTED);
+       s->buffer_length = cpu_to_be32(sizeof(*s));
+
+       return s;
+}
+
+#else /* CONFIG_PPC_STD_MMU_64 */
+
+static void __init allocate_slb_shadows(int nr_cpus, int limit) { }
 
 #endif /* CONFIG_PPC_STD_MMU_64 */
 
@@ -142,8 +158,13 @@ void __init initialise_paca(struct paca_struct *new_paca, int cpu)
        new_paca->__current = &init_task;
        new_paca->data_offset = 0xfeeeeeeeeeeeeeeeULL;
 #ifdef CONFIG_PPC_STD_MMU_64
-       new_paca->slb_shadow_ptr = &slb_shadow[cpu];
+       new_paca->slb_shadow_ptr = init_slb_shadow(cpu);
 #endif /* CONFIG_PPC_STD_MMU_64 */
+
+#ifdef CONFIG_PPC_BOOK3E
+       /* For now -- if we have threads this will be adjusted later */
+       new_paca->tcd_ptr = &new_paca->tcd;
+#endif
 }
 
 /* Put the paca pointer into r13 and SPRG_PACA */
@@ -190,6 +211,8 @@ void __init allocate_pacas(void)
 
        allocate_lppacas(nr_cpu_ids, limit);
 
+       allocate_slb_shadows(nr_cpu_ids, limit);
+
        /* Can't use for_each_*_cpu, as they aren't functional yet */
        for (cpu = 0; cpu < nr_cpu_ids; cpu++)
                initialise_paca(&paca[cpu], cpu);