arch/riscv/include/asm/irq_stack.h

   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 */