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