| // SPDX-License-Identifier: GPL-2.0 |
| // Copyright (C) 2017 Arm Ltd. |
| #ifndef __ASM_VMAP_STACK_H |
| #define __ASM_VMAP_STACK_H |
| |
| #include <linux/bug.h> |
| #include <linux/gfp.h> |
| #include <linux/kconfig.h> |
| #include <linux/vmalloc.h> |
| #include <asm/memory.h> |
| #include <asm/pgtable.h> |
| #include <asm/thread_info.h> |
| |
| /* |
| * To ensure that VMAP'd stack overflow detection works correctly, all VMAP'd |
| * stacks need to have the same alignment. |
| */ |
| static inline unsigned long *arch_alloc_vmap_stack(size_t stack_size, int node) |
| { |
| BUILD_BUG_ON(!IS_ENABLED(CONFIG_VMAP_STACK)); |
| |
| return __vmalloc_node_range(stack_size, THREAD_ALIGN, |
| VMALLOC_START, VMALLOC_END, |
| THREADINFO_GFP, PAGE_KERNEL, 0, node, |
| __builtin_return_address(0)); |
| } |
| |
| #endif /* __ASM_VMAP_STACK_H */ |
