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1/* SPDX-License-Identifier: GPL-2.0 */
2// Copyright (C) 2017 Arm Ltd.
3#ifndef __ASM_VMAP_STACK_H
4#define __ASM_VMAP_STACK_H
5
6#include <linux/bug.h>
7#include <linux/gfp.h>
8#include <linux/kconfig.h>
9#include <linux/vmalloc.h>
10#include <asm/memory.h>
11#include <asm/pgtable.h>
12#include <asm/thread_info.h>
13
14/*
15 * To ensure that VMAP'd stack overflow detection works correctly, all VMAP'd
16 * stacks need to have the same alignment.
17 */
18static inline unsigned long *arch_alloc_vmap_stack(size_t stack_size, int node)
19{
20 BUILD_BUG_ON(!IS_ENABLED(CONFIG_VMAP_STACK));
21
22 return __vmalloc_node_range(stack_size, THREAD_ALIGN,
23 VMALLOC_START, VMALLOC_END,
24 THREADINFO_GFP, PAGE_KERNEL, 0, node,
25 __builtin_return_address(0));
26}
27
28#endif /* __ASM_VMAP_STACK_H */