1 files changed, 56 insertions, 170 deletions

diff --git a/arch/sparc/kernel/smp_64.c b/arch/sparc/kernel/smp_64.c
index 9b4506373353..f3969a3600db 100644
--- a/arch/sparc/kernel/smp_64.c
+++ b/arch/sparc/kernel/smp_64.c
@@ -43,11 +43,11 @@
 #include <asm/irq.h>
 #include <asm/irq_regs.h>
 #include <asm/page.h>
-#include <asm/pgtable.h>
 #include <asm/oplib.h>
 #include <linux/uaccess.h>
 #include <asm/starfire.h>
 #include <asm/tlb.h>
+#include <asm/pgalloc.h>
 #include <asm/sections.h>
 #include <asm/prom.h>
 #include <asm/mdesc.h>
@@ -138,9 +138,6 @@ void smp_callin(void)
 
 	set_cpu_online(cpuid, true);
 
-	/* idle thread is expected to have preempt disabled */
-	preempt_disable();
-
 	local_irq_enable();
 
 	cpu_startup_entry(CPUHP_AP_ONLINE_IDLE);
@@ -924,20 +921,26 @@ extern unsigned long xcall_flush_dcache_page_cheetah;
 #endif
 extern unsigned long xcall_flush_dcache_page_spitfire;
 
-static inline void __local_flush_dcache_page(struct page *page)
+static inline void __local_flush_dcache_folio(struct folio *folio)
 {
+	unsigned int i, nr = folio_nr_pages(folio);
+
 #ifdef DCACHE_ALIASING_POSSIBLE
-	__flush_dcache_page(page_address(page),
+	for (i = 0; i < nr; i++)
+		__flush_dcache_page(folio_address(folio) + i * PAGE_SIZE,
 			    ((tlb_type == spitfire) &&
-			     page_mapping_file(page) != NULL));
+			     folio_flush_mapping(folio) != NULL));
 #else
-	if (page_mapping_file(page) != NULL &&
-	    tlb_type == spitfire)
-		__flush_icache_page(__pa(page_address(page)));
+	if (folio_flush_mapping(folio) != NULL &&
+	    tlb_type == spitfire) {
+		unsigned long pfn = folio_pfn(folio)
+		for (i = 0; i < nr; i++)
+			__flush_icache_page((pfn + i) * PAGE_SIZE);
+	}
 #endif
 }
 
-void smp_flush_dcache_page_impl(struct page *page, int cpu)
+void smp_flush_dcache_folio_impl(struct folio *folio, int cpu)
 {
 	int this_cpu;
 
@@ -951,14 +954,14 @@ void smp_flush_dcache_page_impl(struct page *page, int cpu)
 	this_cpu = get_cpu();
 
 	if (cpu == this_cpu) {
-		__local_flush_dcache_page(page);
+		__local_flush_dcache_folio(folio);
 	} else if (cpu_online(cpu)) {
-		void *pg_addr = page_address(page);
+		void *pg_addr = folio_address(folio);
 		u64 data0 = 0;
 
 		if (tlb_type == spitfire) {
 			data0 = ((u64)&xcall_flush_dcache_page_spitfire);
-			if (page_mapping_file(page) != NULL)
+			if (folio_flush_mapping(folio) != NULL)
 				data0 |= ((u64)1 << 32);
 		} else if (tlb_type == cheetah || tlb_type == cheetah_plus) {
 #ifdef DCACHE_ALIASING_POSSIBLE
@@ -966,18 +969,23 @@ void smp_flush_dcache_page_impl(struct page *page, int cpu)
 #endif
 		}
 		if (data0) {
-			xcall_deliver(data0, __pa(pg_addr),
-				      (u64) pg_addr, cpumask_of(cpu));
+			unsigned int i, nr = folio_nr_pages(folio);
+
+			for (i = 0; i < nr; i++) {
+				xcall_deliver(data0, __pa(pg_addr),
+					      (u64) pg_addr, cpumask_of(cpu));
 #ifdef CONFIG_DEBUG_DCFLUSH
-			atomic_inc(&dcpage_flushes_xcall);
+				atomic_inc(&dcpage_flushes_xcall);
 #endif
+				pg_addr += PAGE_SIZE;
+			}
 		}
 	}
 
 	put_cpu();
 }
 
-void flush_dcache_page_all(struct mm_struct *mm, struct page *page)
+void flush_dcache_folio_all(struct mm_struct *mm, struct folio *folio)
 {
 	void *pg_addr;
 	u64 data0;
@@ -991,10 +999,10 @@ void flush_dcache_page_all(struct mm_struct *mm, struct page *page)
 	atomic_inc(&dcpage_flushes);
 #endif
 	data0 = 0;
-	pg_addr = page_address(page);
+	pg_addr = folio_address(folio);
 	if (tlb_type == spitfire) {
 		data0 = ((u64)&xcall_flush_dcache_page_spitfire);
-		if (page_mapping_file(page) != NULL)
+		if (folio_flush_mapping(folio) != NULL)
 			data0 |= ((u64)1 << 32);
 	} else if (tlb_type == cheetah || tlb_type == cheetah_plus) {
 #ifdef DCACHE_ALIASING_POSSIBLE
@@ -1002,13 +1010,18 @@ void flush_dcache_page_all(struct mm_struct *mm, struct page *page)
 #endif
 	}
 	if (data0) {
-		xcall_deliver(data0, __pa(pg_addr),
-			      (u64) pg_addr, cpu_online_mask);
+		unsigned int i, nr = folio_nr_pages(folio);
+
+		for (i = 0; i < nr; i++) {
+			xcall_deliver(data0, __pa(pg_addr),
+				      (u64) pg_addr, cpu_online_mask);
 #ifdef CONFIG_DEBUG_DCFLUSH
-		atomic_inc(&dcpage_flushes_xcall);
+			atomic_inc(&dcpage_flushes_xcall);
 #endif
+			pg_addr += PAGE_SIZE;
+		}
 	}
-	__local_flush_dcache_page(page);
+	__local_flush_dcache_folio(folio);
 
 	preempt_enable();
 }
@@ -1039,38 +1052,9 @@ void smp_fetch_global_pmu(void)
  * are flush_tlb_*() routines, and these run after flush_cache_*()
  * which performs the flushw.
  *
- * The SMP TLB coherency scheme we use works as follows:
- *
- * 1) mm->cpu_vm_mask is a bit mask of which cpus an address
- *    space has (potentially) executed on, this is the heuristic
- *    we use to avoid doing cross calls.
- *
- *    Also, for flushing from kswapd and also for clones, we
- *    use cpu_vm_mask as the list of cpus to make run the TLB.
- *
- * 2) TLB context numbers are shared globally across all processors
- *    in the system, this allows us to play several games to avoid
- *    cross calls.
- *
- *    One invariant is that when a cpu switches to a process, and
- *    that processes tsk->active_mm->cpu_vm_mask does not have the
- *    current cpu's bit set, that tlb context is flushed locally.
- *
- *    If the address space is non-shared (ie. mm->count == 1) we avoid
- *    cross calls when we want to flush the currently running process's
- *    tlb state.  This is done by clearing all cpu bits except the current
- *    processor's in current->mm->cpu_vm_mask and performing the
- *    flush locally only.  This will force any subsequent cpus which run
- *    this task to flush the context from the local tlb if the process
- *    migrates to another cpu (again).
- *
- * 3) For shared address spaces (threads) and swapping we bite the
- *    bullet for most cases and perform the cross call (but only to
- *    the cpus listed in cpu_vm_mask).
- *
- *    The performance gain from "optimizing" away the cross call for threads is
- *    questionable (in theory the big win for threads is the massive sharing of
- *    address space state across processors).
+ * mm->cpu_vm_mask is a bit mask of which cpus an address
+ * space has (potentially) executed on, this is the heuristic
+ * we use to limit cross calls.
  */
 
 /* This currently is only used by the hugetlb arch pre-fault
@@ -1080,18 +1064,13 @@ void smp_fetch_global_pmu(void)
 void smp_flush_tlb_mm(struct mm_struct *mm)
 {
 	u32 ctx = CTX_HWBITS(mm->context);
-	int cpu = get_cpu();
 
-	if (atomic_read(&mm->mm_users) == 1) {
-		cpumask_copy(mm_cpumask(mm), cpumask_of(cpu));
-		goto local_flush_and_out;
-	}
+	get_cpu();
 
 	smp_cross_call_masked(&xcall_flush_tlb_mm,
 			      ctx, 0, 0,
 			      mm_cpumask(mm));
 
-local_flush_and_out:
 	__flush_tlb_mm(ctx, SECONDARY_CONTEXT);
 
 	put_cpu();
@@ -1114,17 +1093,15 @@ void smp_flush_tlb_pending(struct mm_struct *mm, unsigned long nr, unsigned long
 {
 	u32 ctx = CTX_HWBITS(mm->context);
 	struct tlb_pending_info info;
-	int cpu = get_cpu();
+
+	get_cpu();
 
 	info.ctx = ctx;
 	info.nr = nr;
 	info.vaddrs = vaddrs;
 
-	if (mm == current->mm && atomic_read(&mm->mm_users) == 1)
-		cpumask_copy(mm_cpumask(mm), cpumask_of(cpu));
-	else
-		smp_call_function_many(mm_cpumask(mm), tlb_pending_func,
-				       &info, 1);
+	smp_call_function_many(mm_cpumask(mm), tlb_pending_func,
+			       &info, 1);
 
 	__flush_tlb_pending(ctx, nr, vaddrs);
 
@@ -1134,14 +1111,13 @@ void smp_flush_tlb_pending(struct mm_struct *mm, unsigned long nr, unsigned long
 void smp_flush_tlb_page(struct mm_struct *mm, unsigned long vaddr)
 {
 	unsigned long context = CTX_HWBITS(mm->context);
-	int cpu = get_cpu();
 
-	if (mm == current->mm && atomic_read(&mm->mm_users) == 1)
-		cpumask_copy(mm_cpumask(mm), cpumask_of(cpu));
-	else
-		smp_cross_call_masked(&xcall_flush_tlb_page,
-				      context, vaddr, 0,
-				      mm_cpumask(mm));
+	get_cpu();
+
+	smp_cross_call_masked(&xcall_flush_tlb_page,
+			      context, vaddr, 0,
+			      mm_cpumask(mm));
+
 	__flush_tlb_page(context, vaddr);
 
 	put_cpu();
@@ -1226,12 +1202,6 @@ void __irq_entry smp_penguin_jailcell(int irq, struct pt_regs *regs)
 	preempt_enable();
 }
 
-/* /proc/profile writes can call this, don't __init it please. */
-int setup_profiling_timer(unsigned int multiplier)
-{
-	return -EINVAL;
-}
-
 void __init smp_prepare_cpus(unsigned int max_cpus)
 {
 }
@@ -1476,7 +1446,7 @@ static unsigned long send_cpu_poke(int cpu)
 	return hv_err;
 }
 
-void smp_send_reschedule(int cpu)
+void arch_smp_send_reschedule(int cpu)
 {
 	if (cpu == smp_processor_id()) {
 		WARN_ON_ONCE(preemptible());
@@ -1566,50 +1536,6 @@ void smp_send_stop(void)
 		smp_call_function(stop_this_cpu, NULL, 0);
 }
 
-/**
- * pcpu_alloc_bootmem - NUMA friendly alloc_bootmem wrapper for percpu
- * @cpu: cpu to allocate for
- * @size: size allocation in bytes
- * @align: alignment
- *
- * Allocate @size bytes aligned at @align for cpu @cpu.  This wrapper
- * does the right thing for NUMA regardless of the current
- * configuration.
- *
- * RETURNS:
- * Pointer to the allocated area on success, NULL on failure.
- */
-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
-	int node = cpu_to_node(cpu);
-	void *ptr;
-
-	if (!node_online(node) || !NODE_DATA(node)) {
-		ptr = memblock_alloc_from(size, align, goal);
-		pr_info("cpu %d has no node %d or node-local memory\n",
-			cpu, node);
-		pr_debug("per cpu data for cpu%d %lu bytes at %016lx\n",
-			 cpu, size, __pa(ptr));
-	} else {
-		ptr = memblock_alloc_try_nid(size, align, goal,
-					     MEMBLOCK_ALLOC_ACCESSIBLE, node);
-		pr_debug("per cpu data for cpu%d %lu bytes on node%d at "
-			 "%016lx\n", cpu, size, node, __pa(ptr));
-	}
-	return ptr;
-#else
-	return memblock_alloc_from(size, align, goal);
-#endif
-}
-
-static void __init pcpu_free_bootmem(void *ptr, size_t size)
-{
-	memblock_free(__pa(ptr), size);
-}
-
 static int __init pcpu_cpu_distance(unsigned int from, unsigned int to)
 {
 	if (cpu_to_node(from) == cpu_to_node(to))
@@ -1618,46 +1544,9 @@ static int __init pcpu_cpu_distance(unsigned int from, unsigned int to)
 		return REMOTE_DISTANCE;
 }
 
-static void __init pcpu_populate_pte(unsigned long addr)
+static int __init pcpu_cpu_to_node(int cpu)
 {
-	pgd_t *pgd = pgd_offset_k(addr);
-	pud_t *pud;
-	pmd_t *pmd;
-
-	if (pgd_none(*pgd)) {
-		pud_t *new;
-
-		new = memblock_alloc_from(PAGE_SIZE, PAGE_SIZE, PAGE_SIZE);
-		if (!new)
-			goto err_alloc;
-		pgd_populate(&init_mm, pgd, new);
-	}
-
-	pud = pud_offset(pgd, addr);
-	if (pud_none(*pud)) {
-		pmd_t *new;
-
-		new = memblock_alloc_from(PAGE_SIZE, PAGE_SIZE, PAGE_SIZE);
-		if (!new)
-			goto err_alloc;
-		pud_populate(&init_mm, pud, new);
-	}
-
-	pmd = pmd_offset(pud, addr);
-	if (!pmd_present(*pmd)) {
-		pte_t *new;
-
-		new = memblock_alloc_from(PAGE_SIZE, PAGE_SIZE, PAGE_SIZE);
-		if (!new)
-			goto err_alloc;
-		pmd_populate_kernel(&init_mm, pmd, new);
-	}
-
-	return;
-
-err_alloc:
-	panic("%s: Failed to allocate %lu bytes align=%lx from=%lx\n",
-	      __func__, PAGE_SIZE, PAGE_SIZE, PAGE_SIZE);
+	return cpu_to_node(cpu);
 }
 
 void __init setup_per_cpu_areas(void)
@@ -1670,8 +1559,7 @@ void __init setup_per_cpu_areas(void)
 		rc = pcpu_embed_first_chunk(PERCPU_MODULE_RESERVE,
 					    PERCPU_DYNAMIC_RESERVE, 4 << 20,
 					    pcpu_cpu_distance,
-					    pcpu_alloc_bootmem,
-					    pcpu_free_bootmem);
+					    pcpu_cpu_to_node);
 		if (rc)
 			pr_warn("PERCPU: %s allocator failed (%d), "
 				"falling back to page size\n",
@@ -1679,9 +1567,7 @@ void __init setup_per_cpu_areas(void)
 	}
 	if (rc < 0)
 		rc = pcpu_page_first_chunk(PERCPU_MODULE_RESERVE,
-					   pcpu_alloc_bootmem,
-					   pcpu_free_bootmem,
-					   pcpu_populate_pte);
+					   pcpu_cpu_to_node);
 	if (rc < 0)
 		panic("cannot initialize percpu area (err=%d)", rc);