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
17 struct msi_msg;
18 struct irq_alloc_info;
19
20 enum irq_remap_cap {
21 IRQ_POSTING_CAP = 0,
22 };
23
24 enum {
25 IRQ_REMAP_XAPIC_MODE,
26 IRQ_REMAP_X2APIC_MODE,
27 };
28
29 struct 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
36 extern raw_spinlock_t irq_2_ir_lock;
37
38 extern bool irq_remapping_cap(enum irq_remap_cap cap);
39 extern void set_irq_remapping_broken(void);
40 extern int irq_remapping_prepare(void);
41 extern int irq_remapping_enable(void);
42 extern void irq_remapping_disable(void);
43 extern int irq_remapping_reenable(int);
44 extern int irq_remap_enable_fault_handling(void);
45 extern void panic_if_irq_remap(const char *msg);
46
47 /* Get parent irqdomain for interrupt remapping irqdomain */
48 static inline struct irq_domain *arch_get_ir_parent_domain(void)
49 {
50 return x86_vector_domain;
51 }
52
53 extern bool enable_posted_msi;
54
55 static inline bool posted_msi_supported(void)
56 {
57 return enable_posted_msi && irq_remapping_cap(IRQ_POSTING_CAP);
58 }
59
60 #else /* CONFIG_IRQ_REMAP */
61
62 static inline bool irq_remapping_cap(enum irq_remap_cap cap) { return 0; }
63 static inline void set_irq_remapping_broken(void) { }
64 static inline int irq_remapping_prepare(void) { return -ENODEV; }
65 static inline int irq_remapping_enable(void) { return -ENODEV; }
66 static inline void irq_remapping_disable(void) { }
67 static inline int irq_remapping_reenable(int eim) { return -ENODEV; }
68 static inline int irq_remap_enable_fault_handling(void) { return -ENODEV; }
69
70 static inline void panic_if_irq_remap(const char *msg)
71 {
72 }
73
74 #endif /* CONFIG_IRQ_REMAP */
75 #endif /* __X86_IRQ_REMAPPING_H */
76
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.