arch/x86/include/asm/irq_remapping.h

Source file repositories/reference/linux-study-clean/arch/x86/include/asm/irq_remapping.h

File Facts

System
Linux kernel
Corpus path
arch/x86/include/asm/irq_remapping.h
Extension
.h
Size
2580 bytes
Lines
99
Domain
Architecture Layer
Bucket
arch/x86
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

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_enabled(void)
{
	return IS_ENABLED(CONFIG_X86_POSTED_MSI) &&
		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 */

#ifdef CONFIG_X86_POSTED_MSI
void intel_ack_posted_msi_irq(struct irq_data *irqd);
#else
#define intel_ack_posted_msi_irq	NULL
#endif

#endif /* __X86_IRQ_REMAPPING_H */

Annotation

Implementation Notes