1#ifndef __KVM_IO_APIC_H
  2#define __KVM_IO_APIC_H
  3
  4#include <linux/kvm_host.h>
  5
  6#include <kvm/iodev.h>
  7
  8struct kvm;
  9struct kvm_vcpu;
 10
 11#define IOAPIC_NUM_PINS  KVM_IOAPIC_NUM_PINS
 12#define MAX_NR_RESERVED_IOAPIC_PINS KVM_MAX_IRQ_ROUTES
 13#define IOAPIC_VERSION_ID 0x11	/* IOAPIC version */
 14#define IOAPIC_EDGE_TRIG  0
 15#define IOAPIC_LEVEL_TRIG 1
 16
 17#define IOAPIC_DEFAULT_BASE_ADDRESS  0xfec00000
 18#define IOAPIC_MEM_LENGTH            0x100
 19
 20/* Direct registers. */
 21#define IOAPIC_REG_SELECT  0x00
 22#define IOAPIC_REG_WINDOW  0x10
 23
 24/* Indirect registers. */
 25#define IOAPIC_REG_APIC_ID 0x00	/* x86 IOAPIC only */
 26#define IOAPIC_REG_VERSION 0x01
 27#define IOAPIC_REG_ARB_ID  0x02	/* x86 IOAPIC only */
 28
 29/*ioapic delivery mode*/
 30#define	IOAPIC_FIXED			0x0
 31#define	IOAPIC_LOWEST_PRIORITY		0x1
 32#define	IOAPIC_PMI			0x2
 33#define	IOAPIC_NMI			0x4
 34#define	IOAPIC_INIT			0x5
 35#define	IOAPIC_EXTINT			0x7
 36
 37#ifdef CONFIG_X86
 38#define RTC_GSI 8
 39#else
 40#define RTC_GSI -1U
 41#endif
 42
 43struct dest_map {
 44	/* vcpu bitmap where IRQ has been sent */
 45	DECLARE_BITMAP(map, KVM_MAX_VCPUS);
 46
 47	/*
 48	 * Vector sent to a given vcpu, only valid when
 49	 * the vcpu's bit in map is set
 50	 */
 51	u8 vectors[KVM_MAX_VCPUS];
 52};
 53
 54
 55struct rtc_status {
 56	int pending_eoi;
 57	struct dest_map dest_map;
 58};
 59
 60union kvm_ioapic_redirect_entry {
 61	u64 bits;
 62	struct {
 63		u8 vector;
 64		u8 delivery_mode:3;
 65		u8 dest_mode:1;
 66		u8 delivery_status:1;
 67		u8 polarity:1;
 68		u8 remote_irr:1;
 69		u8 trig_mode:1;
 70		u8 mask:1;
 71		u8 reserve:7;
 72		u8 reserved[4];
 73		u8 dest_id;
 74	} fields;
 75};
 76
 77struct kvm_ioapic {
 78	u64 base_address;
 79	u32 ioregsel;
 80	u32 id;
 81	u32 irr;
 82	u32 pad;
 83	union kvm_ioapic_redirect_entry redirtbl[IOAPIC_NUM_PINS];
 84	unsigned long irq_states[IOAPIC_NUM_PINS];
 85	struct kvm_io_device dev;
 86	struct kvm *kvm;
 87	void (*ack_notifier)(void *opaque, int irq);
 88	spinlock_t lock;
 89	struct rtc_status rtc_status;
 90	struct delayed_work eoi_inject;
 91	u32 irq_eoi[IOAPIC_NUM_PINS];
 92	u32 irr_delivered;
 93};
 94
 95#ifdef DEBUG
 96#define ASSERT(x)  							\
 97do {									\
 98	if (!(x)) {							\
 99		printk(KERN_EMERG "assertion failed %s: %d: %s\n",	\
100		       __FILE__, __LINE__, #x);				\
101		BUG();							\
102	}								\
103} while (0)
104#else
105#define ASSERT(x) do { } while (0)
106#endif
107
108static inline struct kvm_ioapic *ioapic_irqchip(struct kvm *kvm)
109{
110	return kvm->arch.vioapic;
111}
112
113static inline int ioapic_in_kernel(struct kvm *kvm)
114{
115	int ret;
116
117	ret = (ioapic_irqchip(kvm) != NULL);
118	return ret;
119}
120
121void kvm_rtc_eoi_tracking_restore_one(struct kvm_vcpu *vcpu);
122bool kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source,
123		int short_hand, unsigned int dest, int dest_mode);
124int kvm_apic_compare_prio(struct kvm_vcpu *vcpu1, struct kvm_vcpu *vcpu2);
125void kvm_ioapic_update_eoi(struct kvm_vcpu *vcpu, int vector,
126			int trigger_mode);
127int kvm_ioapic_init(struct kvm *kvm);
128void kvm_ioapic_destroy(struct kvm *kvm);
129int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int irq_source_id,
130		       int level, bool line_status);
131void kvm_ioapic_clear_all(struct kvm_ioapic *ioapic, int irq_source_id);
132int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,
133			     struct kvm_lapic_irq *irq,
134			     struct dest_map *dest_map);
135int kvm_get_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
136int kvm_set_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
137void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu,
138			   ulong *ioapic_handled_vectors);
139void kvm_scan_ioapic_routes(struct kvm_vcpu *vcpu,
140			    ulong *ioapic_handled_vectors);
141#endif