arch/x86/kvm/ioapic.h

Source file repositories/reference/linux-study-clean/arch/x86/kvm/ioapic.h

File Facts

System
Linux kernel
Corpus path
arch/x86/kvm/ioapic.h
Extension
.h
Size
3290 bytes
Lines
128
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 rtc_status {
	int pending_eoi;

	/* vcpu bitmap where IRQ has been sent */
	DECLARE_BITMAP(map, KVM_MAX_VCPU_IDS);

	/*
	 * Vector sent to a given vcpu, only valid when
	 * the vcpu's bit in map is set
	 */
	u8 vectors[KVM_MAX_VCPU_IDS];
};

union kvm_ioapic_redirect_entry {
	u64 bits;
	struct {
		u8 vector;
		u8 delivery_mode:3;
		u8 dest_mode:1;
		u8 delivery_status:1;
		u8 polarity:1;
		u8 remote_irr:1;
		u8 trig_mode:1;
		u8 mask:1;
		u8 reserve:7;
		u8 reserved[4];
		u8 dest_id;
	} fields;
};

struct kvm_ioapic {
	u64 base_address;
	u32 ioregsel;
	u32 id;
	u32 irr;
	u32 pad;
	union kvm_ioapic_redirect_entry redirtbl[IOAPIC_NUM_PINS];
	unsigned long irq_states[IOAPIC_NUM_PINS];
	struct kvm_io_device dev;
	struct kvm *kvm;
	spinlock_t lock;
	struct rtc_status rtc_status;
	struct delayed_work eoi_inject;
	u32 irq_eoi[IOAPIC_NUM_PINS];
	u32 irr_delivered;

	/* reads protected by irq_srcu, writes by irq_lock */
	struct hlist_head mask_notifier_list;
};

struct kvm_irq_mask_notifier {
	void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
	int irq;
	struct hlist_node link;
};

void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
				    struct kvm_irq_mask_notifier *kimn);
void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
				      struct kvm_irq_mask_notifier *kimn);
void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
			     bool mask);

void kvm_rtc_eoi_tracking_restore_one(struct kvm_vcpu *vcpu);
void kvm_ioapic_update_eoi(struct kvm_vcpu *vcpu, int vector,
			int trigger_mode);
int kvm_ioapic_init(struct kvm *kvm);
void kvm_ioapic_destroy(struct kvm *kvm);
int kvm_ioapic_set_irq(struct kvm_kernel_irq_routing_entry *e, struct kvm *kvm,
		       int irq_source_id, int level, bool line_status);

void kvm_get_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
void kvm_set_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu,
			   ulong *ioapic_handled_vectors);
#endif /* CONFIG_KVM_IOAPIC */

static inline int ioapic_in_kernel(struct kvm *kvm)
{
	return irqchip_full(kvm);
}

void kvm_scan_ioapic_routes(struct kvm_vcpu *vcpu,
			    ulong *ioapic_handled_vectors);
void kvm_scan_ioapic_irq(struct kvm_vcpu *vcpu, u32 dest_id, u16 dest_mode,
			 u8 vector, unsigned long *ioapic_handled_vectors);
#endif

Annotation

Implementation Notes