5 OPENSSL_s390xcap - the IBM z processor capabilities vector
9 env OPENSSL_s390xcap=... <application>
13 libcrypto supports z/Architecture instruction set extensions. These
14 extensions are denoted by individual bits in the capabilities vector.
15 When libcrypto is initialized, the bits returned by the STFLE instruction
16 and by the QUERY functions are stored in the vector.
18 To change the set of instructions available to an application, you can
19 set the OPENSSL_s390xcap environment variable before you start the
20 application. After initialization, the capability vector is ANDed bitwise
21 with a mask which is derived from the environment variable.
23 The environment variable is a semicolon-separated list of tokens which is
24 processed from left to right (whitespace is ignored):
26 OPENSSL_s390xcap="<tok1>;<tok2>;..."
28 There are three types of tokens:
34 The name of a processor generation. A bit in the environment variable's
35 mask is set to one if and only if the specified processor generation
36 implements the corresponding instruction set extension. Possible values
37 are z900, z990, z9, z10, z196, zEC12, z13, z14 and z15.
39 =item <string>:<mask>:<mask>
41 The name of an instruction followed by two 64-bit masks. The part of the
42 environment variable's mask corresponding to the specified instruction is
43 set to the specified 128-bit mask. Possible values are kimd, klmd, km, kmc,
44 kmac, kmctr, kmo, kmf, prno, kma, pcc and kdsa.
46 =item stfle:<mask>:<mask>:<mask>
48 Store-facility-list-extended (stfle) followed by three 64-bit masks. The
49 part of the environment variable's mask corresponding to the stfle
50 instruction is set to the specified 192-bit mask.
54 The 64-bit masks are specified in hexadecimal notation. The 0x prefix is
55 optional. Prefix a mask with a tilde (~) to denote a bitwise NOT operation.
57 The following is a list of significant bits for each instruction. Colon
58 rows separate the individual 64-bit masks. The bit numbers in the first
59 column are consistent with [1], that is, 0 denotes the leftmost bit and
60 the numbering is continuous across 64-bit mask boundaries.
62 Bit Mask Facility/Function
65 # 17 1<<46 message-security assist
66 # 25 1<<38 store-clock-fast facility
68 # 76 1<<51 message-security assist extension 3
69 # 77 1<<50 message-security assist extension 4
71 #129 1<<62 vector facility
72 #134 1<<57 vector packed decimal facility
73 #135 1<<56 vector enhancements facility 1
74 #146 1<<45 message-security assist extension 8
75 #155 1<<36 message-security assist extension 9
79 # 2 1<<61 KIMD-SHA-256
80 # 3 1<<60 KIMD-SHA-512
81 # 32 1<<31 KIMD-SHA3-224
82 # 33 1<<30 KIMD-SHA3-256
83 # 34 1<<29 KIMD-SHA3-384
84 # 35 1<<28 KIMD-SHA3-512
85 # 36 1<<27 KIMD-SHAKE-128
86 # 37 1<<26 KIMD-SHAKE-256
91 # 32 1<<31 KLMD-SHA3-224
92 # 33 1<<30 KLMD-SHA3-256
93 # 34 1<<29 KLMD-SHA3-384
94 # 35 1<<28 KLMD-SHA3-512
95 # 36 1<<27 KLMD-SHAKE-128
96 # 37 1<<26 KLMD-SHAKE-256
100 # 18 1<<45 KM-AES-128
101 # 19 1<<44 KM-AES-192
102 # 20 1<<43 KM-AES-256
103 # 50 1<<13 KM-XTS-AES-128
104 # 52 1<<11 KM-XTS-AES-256
108 # 18 1<<45 KMC-AES-128
109 # 19 1<<44 KMC-AES-192
110 # 20 1<<43 KMC-AES-256
114 # 18 1<<45 KMAC-AES-128
115 # 19 1<<44 KMAC-AES-192
116 # 20 1<<43 KMAC-AES-256
123 # 18 1<<45 KMO-AES-128
124 # 19 1<<44 KMO-AES-192
125 # 20 1<<43 KMO-AES-256
129 # 18 1<<45 KMF-AES-128
130 # 19 1<<44 KMF-AES-192
131 # 20 1<<43 KMF-AES-256
138 # 18 1<<45 KMA-GCM-AES-128
139 # 19 1<<44 KMA-GCM-AES-192
140 # 20 1<<43 KMA-GCM-AES-256
145 # 64 1<<63 PCC-Scalar-Multiply-P256
146 # 65 1<<62 PCC-Scalar-Multiply-P384
147 # 66 1<<61 PCC-Scalar-Multiply-P521
150 # 1 1<<62 KDSA-ECDSA-Verify-P256
151 # 2 1<<61 KDSA-ECDSA-Verify-P384
152 # 3 1<<60 KDSA-ECDSA-Verify-P521
153 # 9 1<<54 KDSA-ECDSA-Sign-P256
154 # 10 1<<53 KDSA-ECDSA-Sign-P384
155 # 11 1<<52 KDSA-ECDSA-Sign-P521
164 Disables all instruction set extensions which the z196 processor does not implement:
166 OPENSSL_s390xcap="z196"
168 Disables the vector facility:
170 OPENSSL_s390xcap="stfle:~0:~0:~0x4000000000000000"
172 Disables the KM-XTS-AES and and the KIMD-SHAKE function codes:
174 OPENSSL_s390xcap="km:~0x2800:~0;kimd:~0xc000000:~0"
178 [1] z/Architecture Principles of Operation, SA22-7832-12
182 Copyright 2018 The OpenSSL Project Authors. All Rights Reserved.
184 Licensed under the Apache License 2.0 (the "License"). You may not use
185 this file except in compliance with the License. You can obtain a copy
186 in the file LICENSE in the source distribution or at
187 L<https://www.openssl.org/source/license.html>.