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