irq_remapping.h 2.9 KB
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/*
 * Copyright (C) 2012 Advanced Micro Devices, Inc.
 * Author: Joerg Roedel <joerg.roedel@amd.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published
 * by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 * This header file contains the interface of the interrupt remapping code to
 * the x86 interrupt management code.
 */

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#ifndef __X86_IRQ_REMAPPING_H
#define __X86_IRQ_REMAPPING_H
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#include <asm/irqdomain.h>
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#include <asm/hw_irq.h>
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#include <asm/io_apic.h>
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struct msi_msg;
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struct irq_alloc_info;
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enum irq_remap_cap {
	IRQ_POSTING_CAP = 0,
};

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

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#ifdef CONFIG_IRQ_REMAP
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extern bool irq_remapping_cap(enum irq_remap_cap cap);
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extern void set_irq_remapping_broken(void);
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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);
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extern void panic_if_irq_remap(const char *msg);
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extern struct irq_domain *
irq_remapping_get_ir_irq_domain(struct irq_alloc_info *info);
extern struct irq_domain *
irq_remapping_get_irq_domain(struct irq_alloc_info *info);

/* Create PCI MSI/MSIx irqdomain, use @parent as the parent irqdomain. */
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extern struct irq_domain *
arch_create_remap_msi_irq_domain(struct irq_domain *par, const char *n, int id);
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/* Get parent irqdomain for interrupt remapping irqdomain */
static inline struct irq_domain *arch_get_ir_parent_domain(void)
{
	return x86_vector_domain;
}

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#else  /* CONFIG_IRQ_REMAP */

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static inline bool irq_remapping_cap(enum irq_remap_cap cap) { return 0; }
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static inline void set_irq_remapping_broken(void) { }
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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; }
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static inline void panic_if_irq_remap(const char *msg)
{
}
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static inline struct irq_domain *
irq_remapping_get_ir_irq_domain(struct irq_alloc_info *info)
{
	return NULL;
}

static inline struct irq_domain *
irq_remapping_get_irq_domain(struct irq_alloc_info *info)
{
	return NULL;
}

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