1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
2 | |
3 | /* |
4 | * Quirks for AMD IOMMU |
5 | * |
6 | * Copyright (C) 2019 Kai-Heng Feng <kai.heng.feng@canonical.com> |
7 | */ |
8 | |
9 | #ifdef CONFIG_DMI |
10 | #include <linux/dmi.h> |
11 | |
12 | #include "amd_iommu.h" |
13 | |
14 | #define IVHD_SPECIAL_IOAPIC 1 |
15 | |
16 | struct ivrs_quirk_entry { |
17 | u8 id; |
18 | u32 devid; |
19 | }; |
20 | |
21 | enum { |
22 | DELL_INSPIRON_7375 = 0, |
23 | DELL_LATITUDE_5495, |
24 | LENOVO_IDEAPAD_330S_15ARR, |
25 | }; |
26 | |
27 | static const struct ivrs_quirk_entry ivrs_ioapic_quirks[][3] __initconst = { |
28 | /* ivrs_ioapic[4]=00:14.0 ivrs_ioapic[5]=00:00.2 */ |
29 | [DELL_INSPIRON_7375] = { |
30 | { .id = 4, .devid = 0xa0 }, |
31 | { .id = 5, .devid = 0x2 }, |
32 | {} |
33 | }, |
34 | /* ivrs_ioapic[4]=00:14.0 */ |
35 | [DELL_LATITUDE_5495] = { |
36 | { .id = 4, .devid = 0xa0 }, |
37 | {} |
38 | }, |
39 | /* ivrs_ioapic[32]=00:14.0 */ |
40 | [LENOVO_IDEAPAD_330S_15ARR] = { |
41 | { .id = 32, .devid = 0xa0 }, |
42 | {} |
43 | }, |
44 | {} |
45 | }; |
46 | |
47 | static int __init ivrs_ioapic_quirk_cb(const struct dmi_system_id *d) |
48 | { |
49 | const struct ivrs_quirk_entry *i; |
50 | |
51 | for (i = d->driver_data; i->id != 0 && i->devid != 0; i++) |
52 | add_special_device(IVHD_SPECIAL_IOAPIC, id: i->id, devid: (u32 *)&i->devid, cmd_line: 0); |
53 | |
54 | return 0; |
55 | } |
56 | |
57 | static const struct dmi_system_id ivrs_quirks[] __initconst = { |
58 | { |
59 | .callback = ivrs_ioapic_quirk_cb, |
60 | .ident = "Dell Inspiron 7375" , |
61 | .matches = { |
62 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc." ), |
63 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7375" ), |
64 | }, |
65 | .driver_data = (void *)&ivrs_ioapic_quirks[DELL_INSPIRON_7375], |
66 | }, |
67 | { |
68 | .callback = ivrs_ioapic_quirk_cb, |
69 | .ident = "Dell Latitude 5495" , |
70 | .matches = { |
71 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc." ), |
72 | DMI_MATCH(DMI_PRODUCT_NAME, "Latitude 5495" ), |
73 | }, |
74 | .driver_data = (void *)&ivrs_ioapic_quirks[DELL_LATITUDE_5495], |
75 | }, |
76 | { |
77 | /* |
78 | * Acer Aspire A315-41 requires the very same workaround as |
79 | * Dell Latitude 5495 |
80 | */ |
81 | .callback = ivrs_ioapic_quirk_cb, |
82 | .ident = "Acer Aspire A315-41" , |
83 | .matches = { |
84 | DMI_MATCH(DMI_SYS_VENDOR, "Acer" ), |
85 | DMI_MATCH(DMI_PRODUCT_NAME, "Aspire A315-41" ), |
86 | }, |
87 | .driver_data = (void *)&ivrs_ioapic_quirks[DELL_LATITUDE_5495], |
88 | }, |
89 | { |
90 | .callback = ivrs_ioapic_quirk_cb, |
91 | .ident = "Lenovo ideapad 330S-15ARR" , |
92 | .matches = { |
93 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO" ), |
94 | DMI_MATCH(DMI_PRODUCT_NAME, "81FB" ), |
95 | }, |
96 | .driver_data = (void *)&ivrs_ioapic_quirks[LENOVO_IDEAPAD_330S_15ARR], |
97 | }, |
98 | {} |
99 | }; |
100 | |
101 | void __init amd_iommu_apply_ivrs_quirks(void) |
102 | { |
103 | dmi_check_system(list: ivrs_quirks); |
104 | } |
105 | #endif |
106 | |