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2023-12-09 95099d4622f8cb224d94e314c7a8e0df60b13f87 
 kernel/drivers/xen/events/events_internal.h
....@@ -1,70 +1,11 @@
1
+/* SPDX-License-Identifier: GPL-2.0-or-later */
12 /*
23  * Xen Event Channels (internal header)
34  *
45  * Copyright (C) 2013 Citrix Systems R&D Ltd.
5
- *
6
- * This source code is licensed under the GNU General Public License,
7
- * Version 2 or later.  See the file COPYING for more details.
86  */
97 #ifndef __EVENTS_INTERNAL_H__
108 #define __EVENTS_INTERNAL_H__
11
-
12
-/* Interrupt types. */
13
-enum xen_irq_type {
14
-	IRQT_UNBOUND = 0,
15
-	IRQT_PIRQ,
16
-	IRQT_VIRQ,
17
-	IRQT_IPI,
18
-	IRQT_EVTCHN
19
-};
20
-
21
-/*
22
- * Packed IRQ information:
23
- * type - enum xen_irq_type
24
- * event channel - irq->event channel mapping
25
- * cpu - cpu this event channel is bound to
26
- * index - type-specific information:
27
- *    PIRQ - vector, with MSB being "needs EIO", or physical IRQ of the HVM
28
- *           guest, or GSI (real passthrough IRQ) of the device.
29
- *    VIRQ - virq number
30
- *    IPI - IPI vector
31
- *    EVTCHN -
32
- */
33
-struct irq_info {
34
-	struct list_head list;
35
-	struct list_head eoi_list;
36
-	short refcnt;
37
-	short spurious_cnt;
38
-	short type;		/* type */
39
-	u8 mask_reason;		/* Why is event channel masked */
40
-#define EVT_MASK_REASON_EXPLICIT	0x01
41
-#define EVT_MASK_REASON_TEMPORARY	0x02
42
-#define EVT_MASK_REASON_EOI_PENDING	0x04
43
-	u8 is_active;		/* Is event just being handled? */
44
-	unsigned irq;
45
-	unsigned int evtchn;	/* event channel */
46
-	unsigned short cpu;	/* cpu bound */
47
-	unsigned short eoi_cpu;	/* EOI must happen on this cpu */
48
-	unsigned int irq_epoch;	/* If eoi_cpu valid: irq_epoch of event */
49
-	u64 eoi_time;		/* Time in jiffies when to EOI. */
50
-	raw_spinlock_t lock;
51
-
52
-	union {
53
-		unsigned short virq;
54
-		enum ipi_vector ipi;
55
-		struct {
56
-			unsigned short pirq;
57
-			unsigned short gsi;
58
-			unsigned char vector;
59
-			unsigned char flags;
60
-			uint16_t domid;
61
-		} pirq;
62
-	} u;
63
-};
64
-
65
-#define PIRQ_NEEDS_EOI	(1 << 0)
66
-#define PIRQ_SHAREABLE	(1 << 1)
67
-#define PIRQ_MSI_GROUP	(1 << 2)
689 
6910 struct evtchn_loop_ctrl;
7011 
....@@ -72,15 +13,16 @@
7213 	unsigned (*max_channels)(void);
7314 	unsigned (*nr_channels)(void);
7415 
75
-	int (*setup)(struct irq_info *info);
16
+	int (*setup)(evtchn_port_t port);
7617 	void (*remove)(evtchn_port_t port, unsigned int cpu);
77
-	void (*bind_to_cpu)(struct irq_info *info, unsigned cpu);
18
+	void (*bind_to_cpu)(evtchn_port_t evtchn, unsigned int cpu,
19
+			    unsigned int old_cpu);
7820 
79
-	void (*clear_pending)(unsigned port);
80
-	void (*set_pending)(unsigned port);
81
-	bool (*is_pending)(unsigned port);
82
-	void (*mask)(unsigned port);
83
-	void (*unmask)(unsigned port);
21
+	void (*clear_pending)(evtchn_port_t port);
22
+	void (*set_pending)(evtchn_port_t port);
23
+	bool (*is_pending)(evtchn_port_t port);
24
+	void (*mask)(evtchn_port_t port);
25
+	void (*unmask)(evtchn_port_t port);
8426 
8527 	void (*handle_events)(unsigned cpu, struct evtchn_loop_ctrl *ctrl);
8628 	void (*resume)(void);
....@@ -91,13 +33,10 @@
9133 
9234 extern const struct evtchn_ops *evtchn_ops;
9335 
94
-extern int **evtchn_to_irq;
95
-int get_evtchn_to_irq(unsigned int evtchn);
36
+int get_evtchn_to_irq(evtchn_port_t evtchn);
9637 void handle_irq_for_port(evtchn_port_t port, struct evtchn_loop_ctrl *ctrl);
9738 
98
-struct irq_info *info_for_irq(unsigned irq);
99
-unsigned cpu_from_irq(unsigned irq);
100
-unsigned cpu_from_evtchn(unsigned int evtchn);
39
+unsigned int cpu_from_evtchn(evtchn_port_t evtchn);
10140 
10241 static inline unsigned xen_evtchn_max_channels(void)
10342 {
....@@ -108,10 +47,10 @@
10847  * Do any ABI specific setup for a bound event channel before it can
10948  * be unmasked and used.
11049  */
111
-static inline int xen_evtchn_port_setup(struct irq_info *info)
50
+static inline int xen_evtchn_port_setup(evtchn_port_t evtchn)
11251 {
11352 	if (evtchn_ops->setup)
114
-		return evtchn_ops->setup(info);
53
+		return evtchn_ops->setup(evtchn);
11554 	return 0;
11655 }
11756 
....@@ -122,33 +61,34 @@
12261 		evtchn_ops->remove(evtchn, cpu);
12362 }
12463 
125
-static inline void xen_evtchn_port_bind_to_cpu(struct irq_info *info,
126
-					       unsigned cpu)
64
+static inline void xen_evtchn_port_bind_to_cpu(evtchn_port_t evtchn,
65
+					       unsigned int cpu,
66
+					       unsigned int old_cpu)
12767 {
128
-	evtchn_ops->bind_to_cpu(info, cpu);
68
+	evtchn_ops->bind_to_cpu(evtchn, cpu, old_cpu);
12969 }
13070 
131
-static inline void clear_evtchn(unsigned port)
71
+static inline void clear_evtchn(evtchn_port_t port)
13272 {
13373 	evtchn_ops->clear_pending(port);
13474 }
13575 
136
-static inline void set_evtchn(unsigned port)
76
+static inline void set_evtchn(evtchn_port_t port)
13777 {
13878 	evtchn_ops->set_pending(port);
13979 }
14080 
141
-static inline bool test_evtchn(unsigned port)
81
+static inline bool test_evtchn(evtchn_port_t port)
14282 {
14383 	return evtchn_ops->is_pending(port);
14484 }
14585 
146
-static inline void mask_evtchn(unsigned port)
86
+static inline void mask_evtchn(evtchn_port_t port)
14787 {
14888 	return evtchn_ops->mask(port);
14989 }
15090 
151
-static inline void unmask_evtchn(unsigned port)
91
+static inline void unmask_evtchn(evtchn_port_t port)
15292 {
15393 	return evtchn_ops->unmask(port);
15494 }