LXR linux/arch/x86/include/asm/irq

   1/* SPDX-License-Identifier: GPL-2.0-only */
   2/*
   3 * Copyright (C) 2012 Advanced Micro Devices, Inc.
   4 * Author: Joerg Roedel <joerg.roedel@amd.com>
   5 *
   6 * This header file contains the interface of the interrupt remapping code to
   7 * the x86 interrupt management code.
   8 */
   9
  10#ifndef __X86_IRQ_REMAPPING_H
  11#define __X86_IRQ_REMAPPING_H
  12
  13#include <asm/irqdomain.h>
  14#include <asm/hw_irq.h>
  15#include <asm/io_apic.h>
  16
  17struct msi_msg;
  18struct irq_alloc_info;
  19
  20enum irq_remap_cap {
  21        IRQ_POSTING_CAP = 0,
  22};
  23
  24enum {
  25        IRQ_REMAP_XAPIC_MODE,
  26        IRQ_REMAP_X2APIC_MODE,
  27};
  28
  29struct vcpu_data {
  30        u64 pi_desc_addr;       /* Physical address of PI Descriptor */
  31        u32 vector;             /* Guest vector of the interrupt */
  32};
  33
  34#ifdef CONFIG_IRQ_REMAP
  35
  36extern raw_spinlock_t irq_2_ir_lock;
  37
  38extern bool irq_remapping_cap(enum irq_remap_cap cap);
  39extern void set_irq_remapping_broken(void);
  40extern int irq_remapping_prepare(void);
  41extern int irq_remapping_enable(void);
  42extern void irq_remapping_disable(void);
  43extern int irq_remapping_reenable(int);
  44extern int irq_remap_enable_fault_handling(void);
  45extern void panic_if_irq_remap(const char *msg);
  46
  47extern struct irq_domain *
  48irq_remapping_get_ir_irq_domain(struct irq_alloc_info *info);
  49extern struct irq_domain *
  50irq_remapping_get_irq_domain(struct irq_alloc_info *info);
  51
  52/* Create PCI MSI/MSIx irqdomain, use @parent as the parent irqdomain. */
  53extern struct irq_domain *
  54arch_create_remap_msi_irq_domain(struct irq_domain *par, const char *n, int id);
  55
  56/* Get parent irqdomain for interrupt remapping irqdomain */
  57static inline struct irq_domain *arch_get_ir_parent_domain(void)
  58{
  59        return x86_vector_domain;
  60}
  61
  62#else  /* CONFIG_IRQ_REMAP */
  63
  64static inline bool irq_remapping_cap(enum irq_remap_cap cap) { return 0; }
  65static inline void set_irq_remapping_broken(void) { }
  66static inline int irq_remapping_prepare(void) { return -ENODEV; }
  67static inline int irq_remapping_enable(void) { return -ENODEV; }
  68static inline void irq_remapping_disable(void) { }
  69static inline int irq_remapping_reenable(int eim) { return -ENODEV; }
  70static inline int irq_remap_enable_fault_handling(void) { return -ENODEV; }
  71
  72static inline void panic_if_irq_remap(const char *msg)
  73{
  74}
  75
  76static inline struct irq_domain *
  77irq_remapping_get_ir_irq_domain(struct irq_alloc_info *info)
  78{
  79        return NULL;
  80}
  81
  82static inline struct irq_domain *
  83irq_remapping_get_irq_domain(struct irq_alloc_info *info)
  84{
  85        return NULL;
  86}
  87
  88#endif /* CONFIG_IRQ_REMAP */
  89#endif /* __X86_IRQ_REMAPPING_H */
  90