Merge tag 'edac_updates_for_5.9_pt2' of git://git.kernel.org/pub/scm/linux/kernel...
[linux-2.6-microblaze.git] / include / linux / irqchip / arm-gic-v4.h
1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * Copyright (C) 2016,2017 ARM Limited, All Rights Reserved.
4  * Author: Marc Zyngier <marc.zyngier@arm.com>
5  */
6
7 #ifndef __LINUX_IRQCHIP_ARM_GIC_V4_H
8 #define __LINUX_IRQCHIP_ARM_GIC_V4_H
9
10 struct its_vpe;
11
12 /*
13  * Maximum number of ITTs when GITS_TYPER.VMOVP == 0, using the
14  * ITSList mechanism to perform inter-ITS synchronization.
15  */
16 #define GICv4_ITS_LIST_MAX              16
17
18 /* Embedded in kvm.arch */
19 struct its_vm {
20         struct fwnode_handle    *fwnode;
21         struct irq_domain       *domain;
22         struct page             *vprop_page;
23         struct its_vpe          **vpes;
24         int                     nr_vpes;
25         irq_hw_number_t         db_lpi_base;
26         unsigned long           *db_bitmap;
27         int                     nr_db_lpis;
28         u32                     vlpi_count[GICv4_ITS_LIST_MAX];
29 };
30
31 /* Embedded in kvm_vcpu.arch */
32 struct its_vpe {
33         struct page             *vpt_page;
34         struct its_vm           *its_vm;
35         /* per-vPE VLPI tracking */
36         atomic_t                vlpi_count;
37         /* Doorbell interrupt */
38         int                     irq;
39         irq_hw_number_t         vpe_db_lpi;
40         /* VPE resident */
41         bool                    resident;
42         union {
43                 /* GICv4.0 implementations */
44                 struct {
45                         /* VPE proxy mapping */
46                         int     vpe_proxy_event;
47                         /* Implementation Defined Area Invalid */
48                         bool    idai;
49                 };
50                 /* GICv4.1 implementations */
51                 struct {
52                         struct fwnode_handle    *fwnode;
53                         struct irq_domain       *sgi_domain;
54                         struct {
55                                 u8      priority;
56                                 bool    enabled;
57                                 bool    group;
58                         }                       sgi_config[16];
59                         atomic_t vmapp_count;
60                 };
61         };
62
63         /*
64          * Ensures mutual exclusion between affinity setting of the
65          * vPE and vLPI operations using vpe->col_idx.
66          */
67         raw_spinlock_t          vpe_lock;
68         /*
69          * This collection ID is used to indirect the target
70          * redistributor for this VPE. The ID itself isn't involved in
71          * programming of the ITS.
72          */
73         u16                     col_idx;
74         /* Unique (system-wide) VPE identifier */
75         u16                     vpe_id;
76         /* Pending VLPIs on schedule out? */
77         bool                    pending_last;
78 };
79
80 /*
81  * struct its_vlpi_map: structure describing the mapping of a
82  * VLPI. Only to be interpreted in the context of a physical interrupt
83  * it complements.  To be used as the vcpu_info passed to
84  * irq_set_vcpu_affinity().
85  *
86  * @vm:         Pointer to the GICv4 notion of a VM
87  * @vpe:        Pointer to the GICv4 notion of a virtual CPU (VPE)
88  * @vintid:     Virtual LPI number
89  * @properties: Priority and enable bits (as written in the prop table)
90  * @db_enabled: Is the VPE doorbell to be generated?
91  */
92 struct its_vlpi_map {
93         struct its_vm           *vm;
94         struct its_vpe          *vpe;
95         u32                     vintid;
96         u8                      properties;
97         bool                    db_enabled;
98 };
99
100 enum its_vcpu_info_cmd_type {
101         MAP_VLPI,
102         GET_VLPI,
103         PROP_UPDATE_VLPI,
104         PROP_UPDATE_AND_INV_VLPI,
105         SCHEDULE_VPE,
106         DESCHEDULE_VPE,
107         INVALL_VPE,
108         PROP_UPDATE_VSGI,
109 };
110
111 struct its_cmd_info {
112         enum its_vcpu_info_cmd_type     cmd_type;
113         union {
114                 struct its_vlpi_map     *map;
115                 u8                      config;
116                 bool                    req_db;
117                 struct {
118                         bool            g0en;
119                         bool            g1en;
120                 };
121                 struct {
122                         u8              priority;
123                         bool            group;
124                 };
125         };
126 };
127
128 int its_alloc_vcpu_irqs(struct its_vm *vm);
129 void its_free_vcpu_irqs(struct its_vm *vm);
130 int its_make_vpe_resident(struct its_vpe *vpe, bool g0en, bool g1en);
131 int its_make_vpe_non_resident(struct its_vpe *vpe, bool db);
132 int its_invall_vpe(struct its_vpe *vpe);
133 int its_map_vlpi(int irq, struct its_vlpi_map *map);
134 int its_get_vlpi(int irq, struct its_vlpi_map *map);
135 int its_unmap_vlpi(int irq);
136 int its_prop_update_vlpi(int irq, u8 config, bool inv);
137 int its_prop_update_vsgi(int irq, u8 priority, bool group);
138
139 struct irq_domain_ops;
140 int its_init_v4(struct irq_domain *domain,
141                 const struct irq_domain_ops *vpe_ops,
142                 const struct irq_domain_ops *sgi_ops);
143
144 #endif