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