cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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irq_remapping.h (2061B)

      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
     17struct msi_msg;
     18struct irq_alloc_info;
     19
     20enum irq_remap_cap {
     21	IRQ_POSTING_CAP = 0,
     22};
     23
     24enum {
     25	IRQ_REMAP_XAPIC_MODE,
     26	IRQ_REMAP_X2APIC_MODE,
     27};
     28
     29struct 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
     36extern raw_spinlock_t irq_2_ir_lock;
     37
     38extern bool irq_remapping_cap(enum irq_remap_cap cap);
     39extern void set_irq_remapping_broken(void);
     40extern int irq_remapping_prepare(void);
     41extern int irq_remapping_enable(void);
     42extern void irq_remapping_disable(void);
     43extern int irq_remapping_reenable(int);
     44extern int irq_remap_enable_fault_handling(void);
     45extern void panic_if_irq_remap(const char *msg);
     46
     47/* Create PCI MSI/MSIx irqdomain, use @parent as the parent irqdomain. */
     48extern struct irq_domain *
     49arch_create_remap_msi_irq_domain(struct irq_domain *par, const char *n, int id);
     50
     51/* Get parent irqdomain for interrupt remapping irqdomain */
     52static inline struct irq_domain *arch_get_ir_parent_domain(void)
     53{
     54	return x86_vector_domain;
     55}
     56
     57#else  /* CONFIG_IRQ_REMAP */
     58
     59static inline bool irq_remapping_cap(enum irq_remap_cap cap) { return 0; }
     60static inline void set_irq_remapping_broken(void) { }
     61static inline int irq_remapping_prepare(void) { return -ENODEV; }
     62static inline int irq_remapping_enable(void) { return -ENODEV; }
     63static inline void irq_remapping_disable(void) { }
     64static inline int irq_remapping_reenable(int eim) { return -ENODEV; }
     65static inline int irq_remap_enable_fault_handling(void) { return -ENODEV; }
     66
     67static inline void panic_if_irq_remap(const char *msg)
     68{
     69}
     70
     71#endif /* CONFIG_IRQ_REMAP */
     72#endif /* __X86_IRQ_REMAPPING_H */