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 | |
29 | struct msi_msg; |
30 | struct irq_alloc_info; |
31 | |
32 | enum irq_remap_cap { |
33 | IRQ_POSTING_CAP = 0, |
34 | }; |
35 | |
36 | enum { |
37 | IRQ_REMAP_XAPIC_MODE, |
38 | IRQ_REMAP_X2APIC_MODE, |
39 | }; |
40 | |
41 | struct vcpu_data { |
42 | u64 pi_desc_addr; /* Physical address of PI Descriptor */ |
43 | u32 vector; /* Guest vector of the interrupt */ |
44 | }; |
45 | |
46 | #ifdef CONFIG_IRQ_REMAP |
47 | |
48 | extern raw_spinlock_t irq_2_ir_lock; |
49 | |
50 | extern bool irq_remapping_cap(enum irq_remap_cap cap); |
51 | extern void set_irq_remapping_broken(void); |
52 | extern int irq_remapping_prepare(void); |
53 | extern int irq_remapping_enable(void); |
54 | extern void irq_remapping_disable(void); |
55 | extern int irq_remapping_reenable(int); |
56 | extern int irq_remap_enable_fault_handling(void); |
57 | extern void panic_if_irq_remap(const char *msg); |
58 | |
59 | extern struct irq_domain * |
60 | irq_remapping_get_ir_irq_domain(struct irq_alloc_info *info); |
61 | extern struct irq_domain * |
62 | irq_remapping_get_irq_domain(struct irq_alloc_info *info); |
63 | |
64 | /* Create PCI MSI/MSIx irqdomain, use @parent as the parent irqdomain. */ |
65 | extern struct irq_domain * |
66 | arch_create_remap_msi_irq_domain(struct irq_domain *par, const char *n, int id); |
67 | |
68 | /* Get parent irqdomain for interrupt remapping irqdomain */ |
69 | static inline struct irq_domain *arch_get_ir_parent_domain(void) |
70 | { |
71 | return x86_vector_domain; |
72 | } |
73 | |
74 | #else /* CONFIG_IRQ_REMAP */ |
75 | |
76 | static inline bool irq_remapping_cap(enum irq_remap_cap cap) { return 0; } |
77 | static inline void set_irq_remapping_broken(void) { } |
78 | static inline int irq_remapping_prepare(void) { return -ENODEV; } |
79 | static inline int irq_remapping_enable(void) { return -ENODEV; } |
80 | static inline void irq_remapping_disable(void) { } |
81 | static inline int irq_remapping_reenable(int eim) { return -ENODEV; } |
82 | static inline int irq_remap_enable_fault_handling(void) { return -ENODEV; } |
83 | |
84 | static inline void panic_if_irq_remap(const char *msg) |
85 | { |
86 | } |
87 | |
88 | static inline struct irq_domain * |
89 | irq_remapping_get_ir_irq_domain(struct irq_alloc_info *info) |
90 | { |
91 | return NULL; |
92 | } |
93 | |
94 | static inline struct irq_domain * |
95 | irq_remapping_get_irq_domain(struct irq_alloc_info *info) |
96 | { |
97 | return NULL; |
98 | } |
99 | |
100 | #endif /* CONFIG_IRQ_REMAP */ |
101 | #endif /* __X86_IRQ_REMAPPING_H */ |
102 | |