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 /* 30 * This is mainly used to communicate information back-and-forth 31 * between SVM and IOMMU for setting up and tearing down posted 32 * interrupt 33 */ 34 struct amd_iommu_pi_data { 35 u64 vapic_addr; /* Physical address of the vCPU's vAPIC. */ 36 u32 ga_tag; 37 u32 vector; /* Guest vector of the interrupt */ 38 int cpu; 39 bool ga_log_intr; 40 bool is_guest_mode; 41 void *ir_data; 42 }; 43 44 struct intel_iommu_pi_data { 45 u64 pi_desc_addr; /* Physical address of PI Descriptor */ 46 u32 vector; /* Guest vector of the interrupt */ 47 }; 48 49 #ifdef CONFIG_IRQ_REMAP 50 51 extern raw_spinlock_t irq_2_ir_lock; 52 53 extern bool irq_remapping_cap(enum irq_remap_cap cap); 54 extern void set_irq_remapping_broken(void); 55 extern int irq_remapping_prepare(void); 56 extern int irq_remapping_enable(void); 57 extern void irq_remapping_disable(void); 58 extern int irq_remapping_reenable(int); 59 extern int irq_remap_enable_fault_handling(void); 60 extern void panic_if_irq_remap(const char *msg); 61 62 /* Get parent irqdomain for interrupt remapping irqdomain */ arch_get_ir_parent_domain(void)63static inline struct irq_domain *arch_get_ir_parent_domain(void) 64 { 65 return x86_vector_domain; 66 } 67 68 extern bool enable_posted_msi; 69 posted_msi_supported(void)70static inline bool posted_msi_supported(void) 71 { 72 return enable_posted_msi && irq_remapping_cap(IRQ_POSTING_CAP); 73 } 74 75 #else /* CONFIG_IRQ_REMAP */ 76 irq_remapping_cap(enum irq_remap_cap cap)77static inline bool irq_remapping_cap(enum irq_remap_cap cap) { return 0; } set_irq_remapping_broken(void)78static inline void set_irq_remapping_broken(void) { } irq_remapping_prepare(void)79static inline int irq_remapping_prepare(void) { return -ENODEV; } irq_remapping_enable(void)80static inline int irq_remapping_enable(void) { return -ENODEV; } irq_remapping_disable(void)81static inline void irq_remapping_disable(void) { } irq_remapping_reenable(int eim)82static inline int irq_remapping_reenable(int eim) { return -ENODEV; } irq_remap_enable_fault_handling(void)83static inline int irq_remap_enable_fault_handling(void) { return -ENODEV; } 84 panic_if_irq_remap(const char * msg)85static inline void panic_if_irq_remap(const char *msg) 86 { 87 } 88 89 #endif /* CONFIG_IRQ_REMAP */ 90 #endif /* __X86_IRQ_REMAPPING_H */ 91