Contributors: 14
Author Tokens Token Proportion Commits Commit Proportion
Joerg Roedel 71 24.40% 5 14.29%
Suresh B. Siddha 54 18.56% 10 28.57%
Feng Wu 46 15.81% 3 8.57%
Jiang Liu 21 7.22% 2 5.71%
Jacob jun Pan 21 7.22% 1 2.86%
Anil S Keshavamurthy 15 5.15% 2 5.71%
Sean Christopherson 14 4.81% 3 8.57%
Suravee Suthikulpanit 13 4.47% 1 2.86%
Neil Horman 11 3.78% 1 2.86%
Thomas Gleixner 10 3.44% 3 8.57%
Konrad Rzeszutek Wilk 8 2.75% 1 2.86%
Sohil Mehta 4 1.37% 1 2.86%
Weidong Han 2 0.69% 1 2.86%
Paolo Bonzini 1 0.34% 1 2.86%
Total 291 35 


/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright (C) 2012 Advanced Micro Devices, Inc.
 * Author: Joerg Roedel <joerg.roedel@amd.com>
 *
 * This header file contains the interface of the interrupt remapping code to
 * the x86 interrupt management code.
 */

#ifndef __X86_IRQ_REMAPPING_H
#define __X86_IRQ_REMAPPING_H

#include <asm/irqdomain.h>
#include <asm/hw_irq.h>
#include <asm/io_apic.h>

struct msi_msg;
struct irq_alloc_info;

enum irq_remap_cap {
	IRQ_POSTING_CAP = 0,
};

enum {
	IRQ_REMAP_XAPIC_MODE,
	IRQ_REMAP_X2APIC_MODE,
};

/*
 * This is mainly used to communicate information back-and-forth
 * between SVM and IOMMU for setting up and tearing down posted
 * interrupt
 */
struct amd_iommu_pi_data {
	u64 vapic_addr;		/* Physical address of the vCPU's vAPIC. */
	u32 ga_tag;
	u32 vector;		/* Guest vector of the interrupt */
	int cpu;
	bool ga_log_intr;
	bool is_guest_mode;
	void *ir_data;
};

struct intel_iommu_pi_data {
	u64 pi_desc_addr;	/* Physical address of PI Descriptor */
	u32 vector;		/* Guest vector of the interrupt */
};

#ifdef CONFIG_IRQ_REMAP

extern raw_spinlock_t irq_2_ir_lock;

extern bool irq_remapping_cap(enum irq_remap_cap cap);
extern void set_irq_remapping_broken(void);
extern int irq_remapping_prepare(void);
extern int irq_remapping_enable(void);
extern void irq_remapping_disable(void);
extern int irq_remapping_reenable(int);
extern int irq_remap_enable_fault_handling(void);
extern void panic_if_irq_remap(const char *msg);

/* Get parent irqdomain for interrupt remapping irqdomain */
static inline struct irq_domain *arch_get_ir_parent_domain(void)
{
	return x86_vector_domain;
}

extern bool enable_posted_msi;

static inline bool posted_msi_supported(void)
{
	return enable_posted_msi && irq_remapping_cap(IRQ_POSTING_CAP);
}

#else  /* CONFIG_IRQ_REMAP */

static inline bool irq_remapping_cap(enum irq_remap_cap cap) { return 0; }
static inline void set_irq_remapping_broken(void) { }
static inline int irq_remapping_prepare(void) { return -ENODEV; }
static inline int irq_remapping_enable(void) { return -ENODEV; }
static inline void irq_remapping_disable(void) { }
static inline int irq_remapping_reenable(int eim) { return -ENODEV; }
static inline int irq_remap_enable_fault_handling(void) { return -ENODEV; }

static inline void panic_if_irq_remap(const char *msg)
{
}

#endif /* CONFIG_IRQ_REMAP */
#endif /* __X86_IRQ_REMAPPING_H */