1 /* SPDX-License-Identifier: GPL-2.0-only */ 1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /* 2 /*
3 * Copyright (C) 2016,2017 ARM Limited, All Ri 3 * Copyright (C) 2016,2017 ARM Limited, All Rights Reserved.
4 * Author: Marc Zyngier <marc.zyngier@arm.com> 4 * Author: Marc Zyngier <marc.zyngier@arm.com>
5 */ 5 */
6 6
7 #ifndef __LINUX_IRQCHIP_ARM_GIC_V4_H 7 #ifndef __LINUX_IRQCHIP_ARM_GIC_V4_H
8 #define __LINUX_IRQCHIP_ARM_GIC_V4_H 8 #define __LINUX_IRQCHIP_ARM_GIC_V4_H
9 9
10 struct its_vpe; 10 struct its_vpe;
11 11
12 /* 12 /*
13 * Maximum number of ITTs when GITS_TYPER.VMOV 13 * Maximum number of ITTs when GITS_TYPER.VMOVP == 0, using the
14 * ITSList mechanism to perform inter-ITS sync 14 * ITSList mechanism to perform inter-ITS synchronization.
15 */ 15 */
16 #define GICv4_ITS_LIST_MAX 16 16 #define GICv4_ITS_LIST_MAX 16
17 17
18 /* Embedded in kvm.arch */ 18 /* Embedded in kvm.arch */
19 struct its_vm { 19 struct its_vm {
20 struct fwnode_handle *fwnode; 20 struct fwnode_handle *fwnode;
21 struct irq_domain *domain; 21 struct irq_domain *domain;
22 struct page *vprop_page; 22 struct page *vprop_page;
23 struct its_vpe **vpes; 23 struct its_vpe **vpes;
24 int nr_vpes; 24 int nr_vpes;
25 irq_hw_number_t db_lpi_base; 25 irq_hw_number_t db_lpi_base;
26 unsigned long *db_bitmap; 26 unsigned long *db_bitmap;
27 int nr_db_lpis; 27 int nr_db_lpis;
28 /* <<
29 * Ensures mutual exclusion between up <<
30 * and map/unmap when using the ITSLis <<
31 * <<
32 * The lock order for any sequence inv <<
33 * vmapp_lock -> vpe_lock ->vmovp_lock <<
34 */ <<
35 raw_spinlock_t vmapp_lock; <<
36 u32 vlpi_count[GIC 28 u32 vlpi_count[GICv4_ITS_LIST_MAX];
37 }; 29 };
38 30
39 /* Embedded in kvm_vcpu.arch */ 31 /* Embedded in kvm_vcpu.arch */
40 struct its_vpe { 32 struct its_vpe {
41 struct page *vpt_page; 33 struct page *vpt_page;
42 struct its_vm *its_vm; 34 struct its_vm *its_vm;
43 /* per-vPE VLPI tracking */ 35 /* per-vPE VLPI tracking */
44 atomic_t vlpi_count; 36 atomic_t vlpi_count;
45 /* Doorbell interrupt */ 37 /* Doorbell interrupt */
46 int irq; 38 int irq;
47 irq_hw_number_t vpe_db_lpi; 39 irq_hw_number_t vpe_db_lpi;
48 /* VPE resident */ 40 /* VPE resident */
49 bool resident; 41 bool resident;
50 /* VPT parse complete */ <<
51 bool ready; <<
52 union { 42 union {
53 /* GICv4.0 implementations */ 43 /* GICv4.0 implementations */
54 struct { 44 struct {
55 /* VPE proxy mapping * 45 /* VPE proxy mapping */
56 int vpe_proxy_even 46 int vpe_proxy_event;
57 /* Implementation Defi 47 /* Implementation Defined Area Invalid */
58 bool idai; 48 bool idai;
59 }; 49 };
60 /* GICv4.1 implementations */ 50 /* GICv4.1 implementations */
61 struct { 51 struct {
62 struct fwnode_handle 52 struct fwnode_handle *fwnode;
63 struct irq_domain 53 struct irq_domain *sgi_domain;
64 struct { 54 struct {
65 u8 priori 55 u8 priority;
66 bool enable 56 bool enabled;
67 bool group; 57 bool group;
68 } 58 } sgi_config[16];
>> 59 atomic_t vmapp_count;
69 }; 60 };
70 }; 61 };
71 62
72 /* Track the VPE being mapped */ <<
73 atomic_t vmapp_count; <<
74 <<
75 /* 63 /*
76 * Ensures mutual exclusion between af 64 * Ensures mutual exclusion between affinity setting of the
77 * vPE and vLPI operations using vpe-> 65 * vPE and vLPI operations using vpe->col_idx.
78 */ 66 */
79 raw_spinlock_t vpe_lock; 67 raw_spinlock_t vpe_lock;
80 /* 68 /*
81 * This collection ID is used to indir 69 * This collection ID is used to indirect the target
82 * redistributor for this VPE. The ID 70 * redistributor for this VPE. The ID itself isn't involved in
83 * programming of the ITS. 71 * programming of the ITS.
84 */ 72 */
85 u16 col_idx; 73 u16 col_idx;
86 /* Unique (system-wide) VPE identifier 74 /* Unique (system-wide) VPE identifier */
87 u16 vpe_id; 75 u16 vpe_id;
88 /* Pending VLPIs on schedule out? */ 76 /* Pending VLPIs on schedule out? */
89 bool pending_last; 77 bool pending_last;
90 }; 78 };
91 79
92 /* 80 /*
93 * struct its_vlpi_map: structure describing t 81 * struct its_vlpi_map: structure describing the mapping of a
94 * VLPI. Only to be interpreted in the context 82 * VLPI. Only to be interpreted in the context of a physical interrupt
95 * it complements. To be used as the vcpu_inf 83 * it complements. To be used as the vcpu_info passed to
96 * irq_set_vcpu_affinity(). 84 * irq_set_vcpu_affinity().
97 * 85 *
98 * @vm: Pointer to the GICv4 notion of 86 * @vm: Pointer to the GICv4 notion of a VM
99 * @vpe: Pointer to the GICv4 notion of 87 * @vpe: Pointer to the GICv4 notion of a virtual CPU (VPE)
100 * @vintid: Virtual LPI number 88 * @vintid: Virtual LPI number
101 * @properties: Priority and enable bits (as w 89 * @properties: Priority and enable bits (as written in the prop table)
102 * @db_enabled: Is the VPE doorbell to be gene 90 * @db_enabled: Is the VPE doorbell to be generated?
103 */ 91 */
104 struct its_vlpi_map { 92 struct its_vlpi_map {
105 struct its_vm *vm; 93 struct its_vm *vm;
106 struct its_vpe *vpe; 94 struct its_vpe *vpe;
107 u32 vintid; 95 u32 vintid;
108 u8 properties; 96 u8 properties;
109 bool db_enabled; 97 bool db_enabled;
110 }; 98 };
111 99
112 enum its_vcpu_info_cmd_type { 100 enum its_vcpu_info_cmd_type {
113 MAP_VLPI, 101 MAP_VLPI,
114 GET_VLPI, 102 GET_VLPI,
115 PROP_UPDATE_VLPI, 103 PROP_UPDATE_VLPI,
116 PROP_UPDATE_AND_INV_VLPI, 104 PROP_UPDATE_AND_INV_VLPI,
117 SCHEDULE_VPE, 105 SCHEDULE_VPE,
118 DESCHEDULE_VPE, 106 DESCHEDULE_VPE,
119 COMMIT_VPE, <<
120 INVALL_VPE, 107 INVALL_VPE,
121 PROP_UPDATE_VSGI, 108 PROP_UPDATE_VSGI,
122 }; 109 };
123 110
124 struct its_cmd_info { 111 struct its_cmd_info {
125 enum its_vcpu_info_cmd_type cmd_ty 112 enum its_vcpu_info_cmd_type cmd_type;
126 union { 113 union {
127 struct its_vlpi_map *map; 114 struct its_vlpi_map *map;
128 u8 config 115 u8 config;
129 bool req_db 116 bool req_db;
130 struct { 117 struct {
131 bool g0en; 118 bool g0en;
132 bool g1en; 119 bool g1en;
133 }; 120 };
134 struct { 121 struct {
135 u8 priori 122 u8 priority;
136 bool group; 123 bool group;
137 }; 124 };
138 }; 125 };
139 }; 126 };
140 127
141 int its_alloc_vcpu_irqs(struct its_vm *vm); 128 int its_alloc_vcpu_irqs(struct its_vm *vm);
142 void its_free_vcpu_irqs(struct its_vm *vm); 129 void its_free_vcpu_irqs(struct its_vm *vm);
143 int its_make_vpe_resident(struct its_vpe *vpe, 130 int its_make_vpe_resident(struct its_vpe *vpe, bool g0en, bool g1en);
144 int its_make_vpe_non_resident(struct its_vpe * 131 int its_make_vpe_non_resident(struct its_vpe *vpe, bool db);
145 int its_commit_vpe(struct its_vpe *vpe); <<
146 int its_invall_vpe(struct its_vpe *vpe); 132 int its_invall_vpe(struct its_vpe *vpe);
147 int its_map_vlpi(int irq, struct its_vlpi_map 133 int its_map_vlpi(int irq, struct its_vlpi_map *map);
148 int its_get_vlpi(int irq, struct its_vlpi_map 134 int its_get_vlpi(int irq, struct its_vlpi_map *map);
149 int its_unmap_vlpi(int irq); 135 int its_unmap_vlpi(int irq);
150 int its_prop_update_vlpi(int irq, u8 config, b 136 int its_prop_update_vlpi(int irq, u8 config, bool inv);
151 int its_prop_update_vsgi(int irq, u8 priority, 137 int its_prop_update_vsgi(int irq, u8 priority, bool group);
152 138
153 struct irq_domain_ops; 139 struct irq_domain_ops;
154 int its_init_v4(struct irq_domain *domain, 140 int its_init_v4(struct irq_domain *domain,
155 const struct irq_domain_ops *v 141 const struct irq_domain_ops *vpe_ops,
156 const struct irq_domain_ops *s 142 const struct irq_domain_ops *sgi_ops);
157 <<
158 bool gic_cpuif_has_vsgi(void); <<
159 143
160 #endif 144 #endif
161 145
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