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/irqdomain.h>
26#include <asm/hw_irq.h>
27#include <asm/io_apic.h>
28
29struct msi_msg;
30struct irq_alloc_info;
31
32enum irq_remap_cap {
33	IRQ_POSTING_CAP = 0,
34};
35
 
 
 
 
 
36struct vcpu_data {
37	u64 pi_desc_addr;	/* Physical address of PI Descriptor */
38	u32 vector;		/* Guest vector of the interrupt */
39};
40
41#ifdef CONFIG_IRQ_REMAP
42
 
 
43extern bool irq_remapping_cap(enum irq_remap_cap cap);
44extern void set_irq_remapping_broken(void);
45extern int irq_remapping_prepare(void);
46extern int irq_remapping_enable(void);
47extern void irq_remapping_disable(void);
48extern int irq_remapping_reenable(int);
49extern int irq_remap_enable_fault_handling(void);
50extern void panic_if_irq_remap(const char *msg);
51
52extern struct irq_domain *
53irq_remapping_get_ir_irq_domain(struct irq_alloc_info *info);
54extern struct irq_domain *
55irq_remapping_get_irq_domain(struct irq_alloc_info *info);
56
57/* Create PCI MSI/MSIx irqdomain, use @parent as the parent irqdomain. */
58extern struct irq_domain *arch_create_msi_irq_domain(struct irq_domain *parent);
59
60/* Get parent irqdomain for interrupt remapping irqdomain */
61static inline struct irq_domain *arch_get_ir_parent_domain(void)
62{
63	return x86_vector_domain;
64}
65
66#else  /* CONFIG_IRQ_REMAP */
67
68static inline bool irq_remapping_cap(enum irq_remap_cap cap) { return 0; }
69static inline void set_irq_remapping_broken(void) { }
70static inline int irq_remapping_prepare(void) { return -ENODEV; }
71static inline int irq_remapping_enable(void) { return -ENODEV; }
72static inline void irq_remapping_disable(void) { }
73static inline int irq_remapping_reenable(int eim) { return -ENODEV; }
74static inline int irq_remap_enable_fault_handling(void) { return -ENODEV; }
75
76static inline void panic_if_irq_remap(const char *msg)
77{
78}
79
80static inline struct irq_domain *
81irq_remapping_get_ir_irq_domain(struct irq_alloc_info *info)
82{
83	return NULL;
84}
85
86static inline struct irq_domain *
87irq_remapping_get_irq_domain(struct irq_alloc_info *info)
88{
89	return NULL;
90}
91
92#endif /* CONFIG_IRQ_REMAP */
93#endif /* __X86_IRQ_REMAPPING_H */