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 extern struct irq_domain * 48 irq_remapping_get_ir_irq_domain(struct irq_alloc_info *info); 49 extern struct irq_domain * 50 irq_remapping_get_irq_domain(struct irq_alloc_info *info); 51 52 /* Create PCI MSI/MSIx irqdomain, use @parent as the parent irqdomain. */ 53 extern struct irq_domain * 54 arch_create_remap_msi_irq_domain(struct irq_domain *par, const char *n, int id); 55 56 /* Get parent irqdomain for interrupt remapping irqdomain */ 57 static inline struct irq_domain *arch_get_ir_parent_domain(void) 58 { 59 return x86_vector_domain; 60 } 61 62 #else /* CONFIG_IRQ_REMAP */ 63 64 static inline bool irq_remapping_cap(enum irq_remap_cap cap) { return 0; } 65 static inline void set_irq_remapping_broken(void) { } 66 static inline int irq_remapping_prepare(void) { return -ENODEV; } 67 static inline int irq_remapping_enable(void) { return -ENODEV; } 68 static inline void irq_remapping_disable(void) { } 69 static inline int irq_remapping_reenable(int eim) { return -ENODEV; } 70 static inline int irq_remap_enable_fault_handling(void) { return -ENODEV; } 71 72 static inline void panic_if_irq_remap(const char *msg) 73 { 74 } 75 76 static inline struct irq_domain * 77 irq_remapping_get_ir_irq_domain(struct irq_alloc_info *info) 78 { 79 return NULL; 80 } 81 82 static inline struct irq_domain * 83 irq_remapping_get_irq_domain(struct irq_alloc_info *info) 84 { 85 return NULL; 86 } 87 88 #endif /* CONFIG_IRQ_REMAP */ 89 #endif /* __X86_IRQ_REMAPPING_H */ 90