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