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
47/* Get parent irqdomain for interrupt remapping irqdomain */
48static inline struct irq_domain *arch_get_ir_parent_domain(void)
49{
50	return x86_vector_domain;
51}
 
 
 
 
 
 
 
 
 
52
53#else  /* CONFIG_IRQ_REMAP */
54
55static inline bool irq_remapping_cap(enum irq_remap_cap cap) { return 0; }
56static inline void set_irq_remapping_broken(void) { }
 
 
57static inline int irq_remapping_prepare(void) { return -ENODEV; }
58static inline int irq_remapping_enable(void) { return -ENODEV; }
59static inline void irq_remapping_disable(void) { }
60static inline int irq_remapping_reenable(int eim) { return -ENODEV; }
61static inline int irq_remap_enable_fault_handling(void) { return -ENODEV; }
62
63static inline void panic_if_irq_remap(const char *msg)
 
 
 
64{
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
65}
66
67#endif /* CONFIG_IRQ_REMAP */
 
68#endif /* __X86_IRQ_REMAPPING_H */

 
  1/*
  2 * Copyright (C) 2012 Advanced Micro Devices, Inc.
  3 * Author: Joerg Roedel <joerg.roedel@amd.com>
  4 *
  5 * This program is free software; you can redistribute it and/or modify it
  6 * under the terms of the GNU General Public License version 2 as published
  7 * by the Free Software Foundation.
  8 *
  9 * This program is distributed in the hope that it will be useful,
 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 12 * GNU General Public License for more details.
 13 *
 14 * You should have received a copy of the GNU General Public License
 15 * along with this program; if not, write to the Free Software
 16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 17 *
 18 * This header file contains the interface of the interrupt remapping code to
 19 * the x86 interrupt management code.
 20 */
 21
 22#ifndef __X86_IRQ_REMAPPING_H
 23#define __X86_IRQ_REMAPPING_H
 24
 
 
 25#include <asm/io_apic.h>
 26
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 27#ifdef CONFIG_IRQ_REMAP
 28
 29extern int irq_remapping_enabled;
 30
 31extern void setup_irq_remapping_ops(void);
 32extern int irq_remapping_supported(void);
 33extern int irq_remapping_prepare(void);
 34extern int irq_remapping_enable(void);
 35extern void irq_remapping_disable(void);
 36extern int irq_remapping_reenable(int);
 37extern int irq_remap_enable_fault_handling(void);
 38extern int setup_ioapic_remapped_entry(int irq,
 39				       struct IO_APIC_route_entry *entry,
 40				       unsigned int destination,
 41				       int vector,
 42				       struct io_apic_irq_attr *attr);
 43extern int set_remapped_irq_affinity(struct irq_data *data,
 44				     const struct cpumask *mask,
 45				     bool force);
 46extern void free_remapped_irq(int irq);
 47extern void compose_remapped_msi_msg(struct pci_dev *pdev,
 48				     unsigned int irq, unsigned int dest,
 49				     struct msi_msg *msg, u8 hpet_id);
 50extern int msi_alloc_remapped_irq(struct pci_dev *pdev, int irq, int nvec);
 51extern int msi_setup_remapped_irq(struct pci_dev *pdev, unsigned int irq,
 52				  int index, int sub_handle);
 53extern int setup_hpet_msi_remapped(unsigned int irq, unsigned int id);
 54
 55#else  /* CONFIG_IRQ_REMAP */
 56
 57#define irq_remapping_enabled	0
 58
 59static inline void setup_irq_remapping_ops(void) { }
 60static inline int irq_remapping_supported(void) { return 0; }
 61static inline int irq_remapping_prepare(void) { return -ENODEV; }
 62static inline int irq_remapping_enable(void) { return -ENODEV; }
 63static inline void irq_remapping_disable(void) { }
 64static inline int irq_remapping_reenable(int eim) { return -ENODEV; }
 65static inline int irq_remap_enable_fault_handling(void) { return -ENODEV; }
 66static inline int setup_ioapic_remapped_entry(int irq,
 67					      struct IO_APIC_route_entry *entry,
 68					      unsigned int destination,
 69					      int vector,
 70					      struct io_apic_irq_attr *attr)
 71{
 72	return -ENODEV;
 73}
 74static inline int set_remapped_irq_affinity(struct irq_data *data,
 75					    const struct cpumask *mask,
 76					    bool force)
 77{
 78	return 0;
 79}
 80static inline void free_remapped_irq(int irq) { }
 81static inline void compose_remapped_msi_msg(struct pci_dev *pdev,
 82					    unsigned int irq, unsigned int dest,
 83					    struct msi_msg *msg, u8 hpet_id)
 84{
 85}
 86static inline int msi_alloc_remapped_irq(struct pci_dev *pdev, int irq, int nvec)
 87{
 88	return -ENODEV;
 89}
 90static inline int msi_setup_remapped_irq(struct pci_dev *pdev, unsigned int irq,
 91					 int index, int sub_handle)
 92{
 93	return -ENODEV;
 94}
 95static inline int setup_hpet_msi_remapped(unsigned int irq, unsigned int id)
 96{
 97	return -ENODEV;
 98}
 
 99#endif /* CONFIG_IRQ_REMAP */
100
101#endif /* __X86_IRQ_REMAPPING_H */