2 files changed, 21 insertions, 110 deletions

diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index 4f6ed0f113f..fbd1233b392 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -95,6 +95,9 @@ config AUDIT_ARCH
 config HAVE_SETUP_PER_CPU_AREA
 	def_bool y if SPARC64
 
+config NEED_PER_CPU_EMBED_FIRST_CHUNK
+	def_bool y if SPARC64
+
 config GENERIC_HARDIRQS_NO__DO_IRQ
 	bool
 	def_bool y if SPARC64
diff --git a/arch/sparc/kernel/smp_64.c b/arch/sparc/kernel/smp_64.c
index b03fd362c62..ff68373ce6d 100644
--- a/arch/sparc/kernel/smp_64.c
+++ b/arch/sparc/kernel/smp_64.c
@@ -1389,8 +1389,8 @@ void smp_send_stop(void)
  * RETURNS:
  * Pointer to the allocated area on success, NULL on failure.
  */
-static void * __init pcpu_alloc_bootmem(unsigned int cpu, unsigned long size,
-					unsigned long align)
+static void * __init pcpu_alloc_bootmem(unsigned int cpu, size_t size,
+					size_t align)
 {
 	const unsigned long goal = __pa(MAX_DMA_ADDRESS);
 #ifdef CONFIG_NEED_MULTIPLE_NODES
@@ -1415,123 +1415,31 @@ static void * __init pcpu_alloc_bootmem(unsigned int cpu, unsigned long size,
 #endif
 }
 
-#define PCPU_CHUNK_SIZE (4UL * 1024UL * 1024UL)
-
-static void __init pcpu_map_range(unsigned long start, unsigned long end,
-				  struct page *page)
+static void __init pcpu_free_bootmem(void *ptr, size_t size)
 {
-	unsigned long pfn = page_to_pfn(page);
-	unsigned long pte_base;
-
-	BUG_ON((pfn<<PAGE_SHIFT)&(PCPU_CHUNK_SIZE - 1UL));
-
-	pte_base = (_PAGE_VALID | _PAGE_SZ4MB_4U |
-		    _PAGE_CP_4U | _PAGE_CV_4U |
-		    _PAGE_P_4U | _PAGE_W_4U);
-	if (tlb_type == hypervisor)
-		pte_base = (_PAGE_VALID | _PAGE_SZ4MB_4V |
-			    _PAGE_CP_4V | _PAGE_CV_4V |
-			    _PAGE_P_4V | _PAGE_W_4V);
-
-	while (start < end) {
-		pgd_t *pgd = pgd_offset_k(start);
-		unsigned long this_end;
-		pud_t *pud;
-		pmd_t *pmd;
-		pte_t *pte;
-
-		pud = pud_offset(pgd, start);
-		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, start);
-		if (!pmd_present(*pmd)) {
-			pte_t *new;
-
-			new = __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, PAGE_SIZE);
-			pmd_populate_kernel(&init_mm, pmd, new);
-		}
-
-		pte = pte_offset_kernel(pmd, start);
-		this_end = (start + PMD_SIZE) & PMD_MASK;
-		if (this_end > end)
-			this_end = end;
-
-		while (start < this_end) {
-			unsigned long paddr = pfn << PAGE_SHIFT;
-
-			pte_val(*pte) = (paddr | pte_base);
+	free_bootmem(__pa(ptr), size);
+}
 
-			start += PAGE_SIZE;
-			pte++;
-			pfn++;
-		}
-	}
+static int pcpu_cpu_distance(unsigned int from, unsigned int to)
+{
+	if (cpu_to_node(from) == cpu_to_node(to))
+		return LOCAL_DISTANCE;
+	else
+		return REMOTE_DISTANCE;
 }
 
 void __init setup_per_cpu_areas(void)
 {
-	static struct vm_struct vm;
-	struct pcpu_alloc_info *ai;
-	unsigned long delta, cpu;
-	size_t size_sum;
-	size_t ptrs_size;
-	void **ptrs;
+	unsigned long delta;
+	unsigned int cpu;
 	int rc;
 
-	ai = pcpu_alloc_alloc_info(1, nr_cpu_ids);
-
-	ai->static_size = __per_cpu_end - __per_cpu_start;
-	ai->reserved_size = PERCPU_MODULE_RESERVE;
-
-	size_sum = PFN_ALIGN(ai->static_size + ai->reserved_size +
-			     PERCPU_DYNAMIC_RESERVE);
-
-	ai->dyn_size = size_sum - ai->static_size - ai->reserved_size;
-	ai->unit_size = PCPU_CHUNK_SIZE;
-	ai->atom_size = PCPU_CHUNK_SIZE;
-	ai->alloc_size = PCPU_CHUNK_SIZE;
-	ai->groups[0].nr_units = nr_cpu_ids;
-
-	for_each_possible_cpu(cpu)
-		ai->groups[0].cpu_map[cpu] = cpu;
-
-	ptrs_size = PFN_ALIGN(nr_cpu_ids * sizeof(ptrs[0]));
-	ptrs = alloc_bootmem(ptrs_size);
-
-	for_each_possible_cpu(cpu) {
-		ptrs[cpu] = pcpu_alloc_bootmem(cpu, PCPU_CHUNK_SIZE,
-					       PCPU_CHUNK_SIZE);
-
-		free_bootmem(__pa(ptrs[cpu] + size_sum),
-			     PCPU_CHUNK_SIZE - size_sum);
-
-		memcpy(ptrs[cpu], __per_cpu_load, ai->static_size);
-	}
-
-	/* allocate address and map */
-	vm.flags = VM_ALLOC;
-	vm.size = nr_cpu_ids * PCPU_CHUNK_SIZE;
-	vm_area_register_early(&vm, PCPU_CHUNK_SIZE);
-
-	for_each_possible_cpu(cpu) {
-		unsigned long start = (unsigned long) vm.addr;
-		unsigned long end;
-
-		start += cpu * PCPU_CHUNK_SIZE;
-		end = start + PCPU_CHUNK_SIZE;
-		pcpu_map_range(start, end, virt_to_page(ptrs[cpu]));
-	}
-
-	rc = pcpu_setup_first_chunk(ai, vm.addr);
+	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 setup percpu first chunk (%d)", rc);
-
-	free_bootmem(__pa(ptrs), ptrs_size);
+		panic("failed to initialize first chunk (%d)", rc);
 
 	delta = (unsigned long)pcpu_base_addr - (unsigned long)__per_cpu_start;
 	for_each_possible_cpu(cpu)