add boot partition size

hc

2023-12-11 d2ccde1c8e90d38cee87a1b0309ad2827f3fd30d

 kernel/drivers/infiniband/hw/hfi1/mmu_rb.c
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@@ -1,4 +1,5 @@
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 /*
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+ * Copyright(c) 2020 Cornelis Networks, Inc.
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  * Copyright(c) 2016 - 2017 Intel Corporation.
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  *
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  * This file is provided under a dual BSD/GPLv2 license.  When using or
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@@ -48,28 +49,15 @@
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 #include <linux/rculist.h>
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 #include <linux/mmu_notifier.h>
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 #include <linux/interval_tree_generic.h>
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+#include <linux/sched/mm.h>
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 #include "mmu_rb.h"
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 #include "trace.h"
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-struct mmu_rb_handler {
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-	struct mmu_notifier mn;
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-	struct rb_root_cached root;
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-	void *ops_arg;
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-	spinlock_t lock;        /* protect the RB tree */
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-	struct mmu_rb_ops *ops;
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-	struct mm_struct *mm;
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-	struct list_head lru_list;
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-	struct work_struct del_work;
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-	struct list_head del_list;
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-	struct workqueue_struct *wq;
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-};
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-
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 static unsigned long mmu_node_start(struct mmu_rb_node *);
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 static unsigned long mmu_node_last(struct mmu_rb_node *);
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 static int mmu_notifier_range_start(struct mmu_notifier *,
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-				     struct mm_struct *,
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-				     unsigned long, unsigned long, bool);
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+		const struct mmu_notifier_range *);
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 static struct mmu_rb_node *__mmu_rb_search(struct mmu_rb_handler *,
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 					   unsigned long, unsigned long);
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 static void do_remove(struct mmu_rb_handler *handler,
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@@ -77,7 +65,6 @@
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 static void handle_remove(struct work_struct *work);
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 static const struct mmu_notifier_ops mn_opts = {
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-	.flags = MMU_INVALIDATE_DOES_NOT_BLOCK,
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 	.invalidate_range_start = mmu_notifier_range_start,
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 };
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@@ -94,37 +81,36 @@
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 	return PAGE_ALIGN(node->addr + node->len) - 1;
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 }
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-int hfi1_mmu_rb_register(void *ops_arg, struct mm_struct *mm,
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+int hfi1_mmu_rb_register(void *ops_arg,
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 			 struct mmu_rb_ops *ops,
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 			 struct workqueue_struct *wq,
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 			 struct mmu_rb_handler **handler)
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 {
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-	struct mmu_rb_handler *handlr;
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+	struct mmu_rb_handler *h;
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 	int ret;
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-	handlr = kmalloc(sizeof(*handlr), GFP_KERNEL);
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-	if (!handlr)
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+	h = kzalloc(sizeof(*h), GFP_KERNEL);
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+	if (!h)
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 		return -ENOMEM;
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-	handlr->root = RB_ROOT_CACHED;
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-	handlr->ops = ops;
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-	handlr->ops_arg = ops_arg;
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-	INIT_HLIST_NODE(&handlr->mn.hlist);
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-	spin_lock_init(&handlr->lock);
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-	handlr->mn.ops = &mn_opts;
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-	handlr->mm = mm;
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-	INIT_WORK(&handlr->del_work, handle_remove);
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-	INIT_LIST_HEAD(&handlr->del_list);
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-	INIT_LIST_HEAD(&handlr->lru_list);
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-	handlr->wq = wq;
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+	h->root = RB_ROOT_CACHED;
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+	h->ops = ops;
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+	h->ops_arg = ops_arg;
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+	INIT_HLIST_NODE(&h->mn.hlist);
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+	spin_lock_init(&h->lock);
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+	h->mn.ops = &mn_opts;
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+	INIT_WORK(&h->del_work, handle_remove);
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+	INIT_LIST_HEAD(&h->del_list);
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+	INIT_LIST_HEAD(&h->lru_list);
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+	h->wq = wq;
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-	ret = mmu_notifier_register(&handlr->mn, handlr->mm);
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+	ret = mmu_notifier_register(&h->mn, current->mm);
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 	if (ret) {
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-		kfree(handlr);
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+		kfree(h);
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 		return ret;
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 	}
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-	*handler = handlr;
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+	*handler = h;
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 	return 0;
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 }
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@@ -135,8 +121,11 @@
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 	unsigned long flags;
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 	struct list_head del_list;
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+	/* Prevent freeing of mm until we are completely finished. */
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+	mmgrab(handler->mn.mm);
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+
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 	/* Unregister first so we don't get any more notifications. */
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-	mmu_notifier_unregister(&handler->mn, handler->mm);
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+	mmu_notifier_unregister(&handler->mn, handler->mn.mm);
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 	/*
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 	 * Make sure the wq delete handler is finished running.  It will not
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@@ -157,6 +146,9 @@
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 	do_remove(handler, &del_list);
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+	/* Now the mm may be freed. */
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+	mmdrop(handler->mn.mm);
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+
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 	kfree(handler);
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 }
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@@ -168,6 +160,10 @@
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 	int ret = 0;
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 	trace_hfi1_mmu_rb_insert(mnode->addr, mnode->len);
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+
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+	if (current->mm != handler->mn.mm)
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+		return -EPERM;
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+
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 	spin_lock_irqsave(&handler->lock, flags);
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 	node = __mmu_rb_search(handler, mnode->addr, mnode->len);
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 	if (node) {
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@@ -182,6 +178,7 @@
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 		__mmu_int_rb_remove(mnode, &handler->root);
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 		list_del(&mnode->list); /* remove from LRU list */
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 	}
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+	mnode->handler = handler;
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 unlock:
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 	spin_unlock_irqrestore(&handler->lock, flags);
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 	return ret;
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@@ -219,6 +216,9 @@
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 	unsigned long flags;
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 	bool ret = false;
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+	if (current->mm != handler->mn.mm)
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+		return ret;
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+
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 	spin_lock_irqsave(&handler->lock, flags);
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 	node = __mmu_rb_search(handler, addr, len);
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 	if (node) {
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@@ -240,6 +240,9 @@
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 	struct list_head del_list;
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 	unsigned long flags;
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 	bool stop = false;
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+
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+	if (current->mm != handler->mn.mm)
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+		return;
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 	INIT_LIST_HEAD(&del_list);
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@@ -274,6 +277,9 @@
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 {
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 	unsigned long flags;
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+	if (current->mm != handler->mn.mm)
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+		return;
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+
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 	/* Validity of handler and node pointers has been checked by caller. */
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 	trace_hfi1_mmu_rb_remove(node->addr, node->len);
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 	spin_lock_irqsave(&handler->lock, flags);
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@@ -285,10 +291,7 @@
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 }
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292
 
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 static int mmu_notifier_range_start(struct mmu_notifier *mn,
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-				     struct mm_struct *mm,
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-				     unsigned long start,
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-				     unsigned long end,
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-				     bool blockable)
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+		const struct mmu_notifier_range *range)
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 {
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 	struct mmu_rb_handler *handler =
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 		container_of(mn, struct mmu_rb_handler, mn);
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@@ -298,10 +301,11 @@
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 	bool added = false;
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 	spin_lock_irqsave(&handler->lock, flags);
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-	for (node = __mmu_int_rb_iter_first(root, start, end - 1);
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+	for (node = __mmu_int_rb_iter_first(root, range->start, range->end-1);
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 	     node; node = ptr) {
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 		/* Guard against node removal. */
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-		ptr = __mmu_int_rb_iter_next(node, start, end - 1);
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+		ptr = __mmu_int_rb_iter_next(node, range->start,
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+					     range->end - 1);
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 		trace_hfi1_mmu_mem_invalidate(node->addr, node->len);
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 		if (handler->ops->invalidate(handler->ops_arg, node)) {
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 			__mmu_int_rb_remove(node, root);
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@@ -337,7 +341,7 @@
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 /*
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  * Work queue function to remove all nodes that have been queued up to
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- * be removed.  The key feature is that mm->mmap_sem is not being held
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+ * be removed.  The key feature is that mm->mmap_lock is not being held
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  * and the remove callback can sleep while taking it, if needed.
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  */
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 static void handle_remove(struct work_struct *work)