162306a36Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */ 262306a36Sopenharmony_ci// Copyright (C) 2017 Arm Ltd. 362306a36Sopenharmony_ci#ifndef __ASM_VMAP_STACK_H 462306a36Sopenharmony_ci#define __ASM_VMAP_STACK_H 562306a36Sopenharmony_ci 662306a36Sopenharmony_ci#include <linux/bug.h> 762306a36Sopenharmony_ci#include <linux/gfp.h> 862306a36Sopenharmony_ci#include <linux/kconfig.h> 962306a36Sopenharmony_ci#include <linux/vmalloc.h> 1062306a36Sopenharmony_ci#include <linux/pgtable.h> 1162306a36Sopenharmony_ci#include <asm/memory.h> 1262306a36Sopenharmony_ci#include <asm/thread_info.h> 1362306a36Sopenharmony_ci 1462306a36Sopenharmony_ci/* 1562306a36Sopenharmony_ci * To ensure that VMAP'd stack overflow detection works correctly, all VMAP'd 1662306a36Sopenharmony_ci * stacks need to have the same alignment. 1762306a36Sopenharmony_ci */ 1862306a36Sopenharmony_cistatic inline unsigned long *arch_alloc_vmap_stack(size_t stack_size, int node) 1962306a36Sopenharmony_ci{ 2062306a36Sopenharmony_ci void *p; 2162306a36Sopenharmony_ci 2262306a36Sopenharmony_ci BUILD_BUG_ON(!IS_ENABLED(CONFIG_VMAP_STACK)); 2362306a36Sopenharmony_ci 2462306a36Sopenharmony_ci p = __vmalloc_node(stack_size, THREAD_ALIGN, THREADINFO_GFP, node, 2562306a36Sopenharmony_ci __builtin_return_address(0)); 2662306a36Sopenharmony_ci return kasan_reset_tag(p); 2762306a36Sopenharmony_ci} 2862306a36Sopenharmony_ci 2962306a36Sopenharmony_ci#endif /* __ASM_VMAP_STACK_H */ 30