1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * pSeries firmware setup code. |
4 | * |
5 | * Portions from arch/powerpc/platforms/pseries/setup.c: |
6 | * Copyright (C) 1995 Linus Torvalds |
7 | * Adapted from 'alpha' version by Gary Thomas |
8 | * Modified by Cort Dougan (cort@cs.nmt.edu) |
9 | * Modified by PPC64 Team, IBM Corp |
10 | * |
11 | * Portions from arch/powerpc/kernel/firmware.c |
12 | * Copyright (C) 2001 Ben. Herrenschmidt (benh@kernel.crashing.org) |
13 | * Modifications for ppc64: |
14 | * Copyright (C) 2003 Dave Engebretsen <engebret@us.ibm.com> |
15 | * Copyright (C) 2005 Stephen Rothwell, IBM Corporation |
16 | * |
17 | * Copyright 2006 IBM Corporation. |
18 | */ |
19 | |
20 | |
21 | #include <linux/of_fdt.h> |
22 | #include <asm/firmware.h> |
23 | #include <asm/prom.h> |
24 | #include <asm/udbg.h> |
25 | #include <asm/svm.h> |
26 | |
27 | #include "pseries.h" |
28 | |
29 | struct hypertas_fw_feature { |
30 | unsigned long val; |
31 | char * name; |
32 | }; |
33 | |
34 | /* |
35 | * The names in this table match names in rtas/ibm,hypertas-functions. If the |
36 | * entry ends in a '*', only upto the '*' is matched. Otherwise the entire |
37 | * string must match. |
38 | */ |
39 | static __initdata struct hypertas_fw_feature |
40 | hypertas_fw_features_table[] = { |
41 | {FW_FEATURE_PFT, "hcall-pft" }, |
42 | {FW_FEATURE_TCE, "hcall-tce" }, |
43 | {FW_FEATURE_SPRG0, "hcall-sprg0" }, |
44 | {FW_FEATURE_DABR, "hcall-dabr" }, |
45 | {FW_FEATURE_COPY, "hcall-copy" }, |
46 | {FW_FEATURE_ASR, "hcall-asr" }, |
47 | {FW_FEATURE_DEBUG, "hcall-debug" }, |
48 | {FW_FEATURE_PERF, "hcall-perf" }, |
49 | {FW_FEATURE_DUMP, "hcall-dump" }, |
50 | {FW_FEATURE_INTERRUPT, "hcall-interrupt" }, |
51 | {FW_FEATURE_MIGRATE, "hcall-migrate" }, |
52 | {FW_FEATURE_PERFMON, "hcall-perfmon" }, |
53 | {FW_FEATURE_CRQ, "hcall-crq" }, |
54 | {FW_FEATURE_VIO, "hcall-vio" }, |
55 | {FW_FEATURE_RDMA, "hcall-rdma" }, |
56 | {FW_FEATURE_LLAN, "hcall-lLAN" }, |
57 | {FW_FEATURE_BULK_REMOVE, "hcall-bulk" }, |
58 | {FW_FEATURE_XDABR, "hcall-xdabr" }, |
59 | {FW_FEATURE_PUT_TCE_IND | FW_FEATURE_STUFF_TCE, |
60 | "hcall-multi-tce" }, |
61 | {FW_FEATURE_SPLPAR, "hcall-splpar" }, |
62 | {FW_FEATURE_VPHN, "hcall-vphn" }, |
63 | {FW_FEATURE_SET_MODE, "hcall-set-mode" }, |
64 | {FW_FEATURE_BEST_ENERGY, "hcall-best-energy-1*" }, |
65 | {FW_FEATURE_HPT_RESIZE, "hcall-hpt-resize" }, |
66 | {FW_FEATURE_BLOCK_REMOVE, "hcall-block-remove" }, |
67 | {FW_FEATURE_PAPR_SCM, "hcall-scm" }, |
68 | {FW_FEATURE_RPT_INVALIDATE, "hcall-rpt-invalidate" }, |
69 | {FW_FEATURE_ENERGY_SCALE_INFO, "hcall-energy-scale-info" }, |
70 | {FW_FEATURE_WATCHDOG, "hcall-watchdog" }, |
71 | {FW_FEATURE_PLPKS, "hcall-pks" }, |
72 | }; |
73 | |
74 | /* Build up the firmware features bitmask using the contents of |
75 | * device-tree/ibm,hypertas-functions. Ultimately this functionality may |
76 | * be moved into prom.c prom_init(). |
77 | */ |
78 | static void __init fw_hypertas_feature_init(const char *hypertas, |
79 | unsigned long len) |
80 | { |
81 | const char *s; |
82 | int i; |
83 | |
84 | pr_debug(" -> fw_hypertas_feature_init()\n" ); |
85 | |
86 | for (s = hypertas; s < hypertas + len; s += strlen(s) + 1) { |
87 | for (i = 0; i < ARRAY_SIZE(hypertas_fw_features_table); i++) { |
88 | const char *name = hypertas_fw_features_table[i].name; |
89 | size_t size; |
90 | |
91 | /* |
92 | * If there is a '*' at the end of name, only check |
93 | * upto there |
94 | */ |
95 | size = strlen(name); |
96 | if (size && name[size - 1] == '*') { |
97 | if (strncmp(name, s, size - 1)) |
98 | continue; |
99 | } else if (strcmp(name, s)) |
100 | continue; |
101 | |
102 | /* we have a match */ |
103 | powerpc_firmware_features |= |
104 | hypertas_fw_features_table[i].val; |
105 | break; |
106 | } |
107 | } |
108 | |
109 | if (is_secure_guest() && |
110 | (powerpc_firmware_features & FW_FEATURE_PUT_TCE_IND)) { |
111 | powerpc_firmware_features &= ~FW_FEATURE_PUT_TCE_IND; |
112 | pr_debug("SVM: disabling PUT_TCE_IND firmware feature\n" ); |
113 | } |
114 | |
115 | pr_debug(" <- fw_hypertas_feature_init()\n" ); |
116 | } |
117 | |
118 | struct vec5_fw_feature { |
119 | unsigned long val; |
120 | unsigned int feature; |
121 | }; |
122 | |
123 | static __initdata struct vec5_fw_feature |
124 | vec5_fw_features_table[] = { |
125 | {FW_FEATURE_FORM1_AFFINITY, OV5_FORM1_AFFINITY}, |
126 | {FW_FEATURE_PRRN, OV5_PRRN}, |
127 | {FW_FEATURE_DRMEM_V2, OV5_DRMEM_V2}, |
128 | {FW_FEATURE_DRC_INFO, OV5_DRC_INFO}, |
129 | {FW_FEATURE_FORM2_AFFINITY, OV5_FORM2_AFFINITY}, |
130 | }; |
131 | |
132 | static void __init fw_vec5_feature_init(const char *vec5, unsigned long len) |
133 | { |
134 | unsigned int index, feat; |
135 | int i; |
136 | |
137 | pr_debug(" -> fw_vec5_feature_init()\n" ); |
138 | |
139 | for (i = 0; i < ARRAY_SIZE(vec5_fw_features_table); i++) { |
140 | index = OV5_INDX(vec5_fw_features_table[i].feature); |
141 | feat = OV5_FEAT(vec5_fw_features_table[i].feature); |
142 | |
143 | if (index < len && (vec5[index] & feat)) |
144 | powerpc_firmware_features |= |
145 | vec5_fw_features_table[i].val; |
146 | } |
147 | |
148 | pr_debug(" <- fw_vec5_feature_init()\n" ); |
149 | } |
150 | |
151 | /* |
152 | * Called very early, MMU is off, device-tree isn't unflattened |
153 | */ |
154 | static int __init probe_fw_features(unsigned long node, const char *uname, int |
155 | depth, void *data) |
156 | { |
157 | const char *prop; |
158 | int len; |
159 | static int hypertas_found; |
160 | static int vec5_found; |
161 | |
162 | if (depth != 1) |
163 | return 0; |
164 | |
165 | if (!strcmp(uname, "rtas" ) || !strcmp(uname, "rtas@0" )) { |
166 | prop = of_get_flat_dt_prop(node, name: "ibm,hypertas-functions" , |
167 | size: &len); |
168 | if (prop) { |
169 | powerpc_firmware_features |= FW_FEATURE_LPAR; |
170 | fw_hypertas_feature_init(hypertas: prop, len); |
171 | } |
172 | |
173 | hypertas_found = 1; |
174 | } |
175 | |
176 | if (!strcmp(uname, "chosen" )) { |
177 | prop = of_get_flat_dt_prop(node, name: "ibm,architecture-vec-5" , |
178 | size: &len); |
179 | if (prop) |
180 | fw_vec5_feature_init(vec5: prop, len); |
181 | |
182 | vec5_found = 1; |
183 | } |
184 | |
185 | return hypertas_found && vec5_found; |
186 | } |
187 | |
188 | void __init pseries_probe_fw_features(void) |
189 | { |
190 | of_scan_flat_dt(it: probe_fw_features, NULL); |
191 | } |
192 | |