tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef GHES_H
3#define GHES_H
4
5#include <acpi/apei.h>
6#include <acpi/hed.h>
7
8/*
9 * One struct ghes is created for each generic hardware error source.
10 * It provides the context for APEI hardware error timer/IRQ/SCI/NMI
11 * handler.
12 *
13 * estatus: memory buffer for error status block, allocated during
14 * HEST parsing.
15 */
16#define GHES_TO_CLEAR 0x0001
17#define GHES_EXITING 0x0002
18
19struct ghes {
20 union {
21 struct acpi_hest_generic *generic;
22 struct acpi_hest_generic_v2 *generic_v2;
23 };
24 struct acpi_hest_generic_status *estatus;
25 u64 buffer_paddr;
26 unsigned long flags;
27 union {
28 struct list_head list;
29 struct timer_list timer;
30 unsigned int irq;
31 };
32};
33
34struct ghes_estatus_node {
35 struct llist_node llnode;
36 struct acpi_hest_generic *generic;
37 struct ghes *ghes;
38};
39
40struct ghes_estatus_cache {
41 u32 estatus_len;
42 atomic_t count;
43 struct acpi_hest_generic *generic;
44 unsigned long long time_in;
45 struct rcu_head rcu;
46};
47
48enum {
49 GHES_SEV_NO = 0x0,
50 GHES_SEV_CORRECTED = 0x1,
51 GHES_SEV_RECOVERABLE = 0x2,
52 GHES_SEV_PANIC = 0x3,
53};
54
55/* From drivers/edac/ghes_edac.c */
56
57#ifdef CONFIG_EDAC_GHES
58void ghes_edac_report_mem_error(struct ghes *ghes, int sev,
59 struct cper_sec_mem_err *mem_err);
60
61int ghes_edac_register(struct ghes *ghes, struct device *dev);
62
63void ghes_edac_unregister(struct ghes *ghes);
64
65#else
66static inline void ghes_edac_report_mem_error(struct ghes *ghes, int sev,
67 struct cper_sec_mem_err *mem_err)
68{
69}
70
71static inline int ghes_edac_register(struct ghes *ghes, struct device *dev)
72{
73 return 0;
74}
75
76static inline void ghes_edac_unregister(struct ghes *ghes)
77{
78}
79#endif
80
81static inline int acpi_hest_get_version(struct acpi_hest_generic_data *gdata)
82{
83 return gdata->revision >> 8;
84}
85
86static inline void *acpi_hest_get_payload(struct acpi_hest_generic_data *gdata)
87{
88 if (acpi_hest_get_version(gdata) >= 3)
89 return (void *)(((struct acpi_hest_generic_data_v300 *)(gdata)) + 1);
90
91 return gdata + 1;
92}
93
94static inline int acpi_hest_get_error_length(struct acpi_hest_generic_data *gdata)
95{
96 return ((struct acpi_hest_generic_data *)(gdata))->error_data_length;
97}
98
99static inline int acpi_hest_get_size(struct acpi_hest_generic_data *gdata)
100{
101 if (acpi_hest_get_version(gdata) >= 3)
102 return sizeof(struct acpi_hest_generic_data_v300);
103
104 return sizeof(struct acpi_hest_generic_data);
105}
106
107static inline int acpi_hest_get_record_size(struct acpi_hest_generic_data *gdata)
108{
109 return (acpi_hest_get_size(gdata) + acpi_hest_get_error_length(gdata));
110}
111
112static inline void *acpi_hest_get_next(struct acpi_hest_generic_data *gdata)
113{
114 return (void *)(gdata) + acpi_hest_get_record_size(gdata);
115}
116
117#define apei_estatus_for_each_section(estatus, section) \
118 for (section = (struct acpi_hest_generic_data *)(estatus + 1); \
119 (void *)section - (void *)(estatus + 1) < estatus->data_length; \
120 section = acpi_hest_get_next(section))
121
122int ghes_notify_sea(void);
123
124#endif /* GHES_H */