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 struct 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 43 extern bool irq_remapping_cap(enum irq_remap_cap cap); 44 extern void set_irq_remapping_broken(void); 45 extern int irq_remapping_prepare(void); 46 extern int irq_remapping_enable(void); 47 extern void irq_remapping_disable(void); 48 extern int irq_remapping_reenable(int); 49 extern int irq_remap_enable_fault_handling(void); 50 extern void panic_if_irq_remap(const char *msg); 51 52 extern struct irq_domain * 53 irq_remapping_get_ir_irq_domain(struct irq_alloc_info *info); 54 extern struct irq_domain * 55 irq_remapping_get_irq_domain(struct irq_alloc_info *info); 56 57 /* Create PCI MSI/MSIx irqdomain, use @parent as the parent irqdomain. */ 58 extern struct irq_domain *arch_create_msi_irq_domain(struct irq_domain *parent); 59 60 /* Get parent irqdomain for interrupt remapping irqdomain */ 61 static inline struct irq_domain *arch_get_ir_parent_domain(void) 62 { 63 return x86_vector_domain; 64 } 65 66 #else /* CONFIG_IRQ_REMAP */ 67 68 static inline bool irq_remapping_cap(enum irq_remap_cap cap) { return 0; } 69 static inline void set_irq_remapping_broken(void) { } 70 static inline int irq_remapping_prepare(void) { return -ENODEV; } 71 static inline int irq_remapping_enable(void) { return -ENODEV; } 72 static inline void irq_remapping_disable(void) { } 73 static inline int irq_remapping_reenable(int eim) { return -ENODEV; } 74 static inline int irq_remap_enable_fault_handling(void) { return -ENODEV; } 75 76 static inline void panic_if_irq_remap(const char *msg) 77 { 78 } 79 80 static inline struct irq_domain * 81 irq_remapping_get_ir_irq_domain(struct irq_alloc_info *info) 82 { 83 return NULL; 84 } 85 86 static inline struct irq_domain * 87 irq_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 */ 94