Line data    Source code

       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             : /* Create PCI MSI/MSIx irqdomain, use @parent as the parent irqdomain. */
      48             : extern struct irq_domain *
      49             : arch_create_remap_msi_irq_domain(struct irq_domain *par, const char *n, int id);
      50             : 
      51             : /* Get parent irqdomain for interrupt remapping irqdomain */
      52             : static inline struct irq_domain *arch_get_ir_parent_domain(void)
      53             : {
      54             :         return x86_vector_domain;
      55             : }
      56             : 
      57             : #else  /* CONFIG_IRQ_REMAP */
      58             : 
      59             : static inline bool irq_remapping_cap(enum irq_remap_cap cap) { return 0; }
      60             : static inline void set_irq_remapping_broken(void) { }
      61             : static inline int irq_remapping_prepare(void) { return -ENODEV; }
      62             : static inline int irq_remapping_enable(void) { return -ENODEV; }
      63             : static inline void irq_remapping_disable(void) { }
      64             : static inline int irq_remapping_reenable(int eim) { return -ENODEV; }
      65           1 : static inline int irq_remap_enable_fault_handling(void) { return -ENODEV; }
      66             : 
      67           0 : static inline void panic_if_irq_remap(const char *msg)
      68             : {
      69           0 : }
      70             : 
      71             : #endif /* CONFIG_IRQ_REMAP */
      72             : #endif /* __X86_IRQ_REMAPPING_H */