1 /* SPDX-License-Identifier: GPL-2.0 */
2
3 #ifndef _ASM_RISCV_IRQ_STACK_H
4 #define _ASM_RISCV_IRQ_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 <linux/pgtable.h>
11 #include <asm/thread_info.h>
12
13 DECLARE_PER_CPU(ulong *, irq_stack_ptr);
14
15 asmlinkage void call_on_irq_stack(struct pt_regs *regs,
16 void (*func)(struct pt_regs *));
17
18 #ifdef CONFIG_VMAP_STACK
19 /*
20 * To ensure that VMAP'd stack overflow detection works correctly, all VMAP'd
21 * stacks need to have the same alignment.
22 */
23 static inline unsigned long *arch_alloc_vmap_stack(size_t stack_size, int node)
24 {
25 void *p;
26
27 p = __vmalloc_node(stack_size, THREAD_ALIGN, THREADINFO_GFP, node,
28 __builtin_return_address(0));
29 return kasan_reset_tag(p);
30 }
31 #endif /* CONFIG_VMAP_STACK */
32
33 #endif /* _ASM_RISCV_IRQ_STACK_H */
34
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