2 * Copyright (C) 2012 Advanced Micro Devices, Inc.
3 * Author: Joerg Roedel <joerg.roedel@amd.com>
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.
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.
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
18 * This header file contains the interface of the interrupt remapping code to
19 * the x86 interrupt management code.
22 #ifndef __X86_IRQ_REMAPPING_H
23 #define __X86_IRQ_REMAPPING_H
25 #include <asm/irqdomain.h>
26 #include <asm/hw_irq.h>
27 #include <asm/io_apic.h>
30 struct irq_alloc_info;
38 IRQ_REMAP_X2APIC_MODE,
42 u64 pi_desc_addr; /* Physical address of PI Descriptor */
43 u32 vector; /* Guest vector of the interrupt */
46 #ifdef CONFIG_IRQ_REMAP
48 extern raw_spinlock_t irq_2_ir_lock;
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);
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);
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);
68 /* Get parent irqdomain for interrupt remapping irqdomain */
69 static inline struct irq_domain *arch_get_ir_parent_domain(void)
71 return x86_vector_domain;
74 #else /* CONFIG_IRQ_REMAP */
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; }
84 static inline void panic_if_irq_remap(const char *msg)
88 static inline struct irq_domain *
89 irq_remapping_get_ir_irq_domain(struct irq_alloc_info *info)
94 static inline struct irq_domain *
95 irq_remapping_get_irq_domain(struct irq_alloc_info *info)
100 #endif /* CONFIG_IRQ_REMAP */
101 #endif /* __X86_IRQ_REMAPPING_H */