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 B<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 four 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 B<z900>, B<z990>, B<z9>, B<z10>, B<z196>, B<zEC12>, B<z13>, B<z14>,
40 =item <string>:<mask>:<mask>
42 The name of an instruction followed by two 64-bit masks. The part of the
43 environment variable's mask corresponding to the specified instruction is
44 set to the specified 128-bit mask. Possible values are B<kimd>, B<klmd>,
45 B<km>, B<kmc>, B<kmac>, B<kmctr>, B<kmo>, B<kmf>, B<prno>, B<kma>, B<pcc>
48 =item stfle:<mask>:<mask>:<mask>
50 Store-facility-list-extended (stfle) followed by three 64-bit masks. The
51 part of the environment variable's mask corresponding to the stfle
52 instruction is set to the specified 192-bit mask.
56 Deactivate modular exponentiation and CRT operation offloading to
57 Crypto Express Adapters.
61 The 64-bit masks are specified in hexadecimal notation. The 0x prefix is
62 optional. Prefix a mask with a tilde, C<~>, to denote a bitwise NOT operation.
64 The following is a list of significant bits for each instruction. Colon
65 rows separate the individual 64-bit masks. The bit numbers in the first
66 column are consistent with [1], that is, 0 denotes the leftmost bit and
67 the numbering is continuous across 64-bit mask boundaries.
69 Bit Mask Facility/Function
72 # 17 1<<46 message-security assist
73 # 25 1<<38 store-clock-fast facility
75 # 76 1<<51 message-security assist extension 3
76 # 77 1<<50 message-security assist extension 4
78 #129 1<<62 vector facility
79 #134 1<<57 vector packed decimal facility
80 #135 1<<56 vector enhancements facility 1
81 #146 1<<45 message-security assist extension 8
82 #155 1<<36 message-security assist extension 9
86 # 2 1<<61 KIMD-SHA-256
87 # 3 1<<60 KIMD-SHA-512
88 # 32 1<<31 KIMD-SHA3-224
89 # 33 1<<30 KIMD-SHA3-256
90 # 34 1<<29 KIMD-SHA3-384
91 # 35 1<<28 KIMD-SHA3-512
92 # 36 1<<27 KIMD-SHAKE-128
93 # 37 1<<26 KIMD-SHAKE-256
98 # 32 1<<31 KLMD-SHA3-224
99 # 33 1<<30 KLMD-SHA3-256
100 # 34 1<<29 KLMD-SHA3-384
101 # 35 1<<28 KLMD-SHA3-512
102 # 36 1<<27 KLMD-SHAKE-128
103 # 37 1<<26 KLMD-SHAKE-256
107 # 18 1<<45 KM-AES-128
108 # 19 1<<44 KM-AES-192
109 # 20 1<<43 KM-AES-256
110 # 50 1<<13 KM-XTS-AES-128
111 # 52 1<<11 KM-XTS-AES-256
115 # 18 1<<45 KMC-AES-128
116 # 19 1<<44 KMC-AES-192
117 # 20 1<<43 KMC-AES-256
121 # 18 1<<45 KMAC-AES-128
122 # 19 1<<44 KMAC-AES-192
123 # 20 1<<43 KMAC-AES-256
130 # 18 1<<45 KMO-AES-128
131 # 19 1<<44 KMO-AES-192
132 # 20 1<<43 KMO-AES-256
136 # 18 1<<45 KMF-AES-128
137 # 19 1<<44 KMF-AES-192
138 # 20 1<<43 KMF-AES-256
145 # 18 1<<45 KMA-GCM-AES-128
146 # 19 1<<44 KMA-GCM-AES-192
147 # 20 1<<43 KMA-GCM-AES-256
152 # 64 1<<63 PCC-Scalar-Multiply-P256
153 # 65 1<<62 PCC-Scalar-Multiply-P384
154 # 66 1<<61 PCC-Scalar-Multiply-P521
155 # 72 1<<55 PCC-Scalar-Multiply-Ed25519
156 # 73 1<<54 PCC-Scalar-Multiply-Ed448
157 # 80 1<<47 PCC-Scalar-Multiply-X25519
158 # 81 1<<46 PCC-Scalar-Multiply-X448
161 # 1 1<<62 KDSA-ECDSA-Verify-P256
162 # 2 1<<61 KDSA-ECDSA-Verify-P384
163 # 3 1<<60 KDSA-ECDSA-Verify-P521
164 # 9 1<<54 KDSA-ECDSA-Sign-P256
165 # 10 1<<53 KDSA-ECDSA-Sign-P384
166 # 11 1<<52 KDSA-ECDSA-Sign-P521
167 # 32 1<<31 KDSA-EdDSA-Verify-Ed25519
168 # 36 1<<27 KDSA-EdDSA-Verify-Ed448
169 # 40 1<<23 KDSA-EdDSA-Sign-Ed25519
170 # 44 1<<19 KDSA-EdDSA-Sign-Ed448
179 Disables all instruction set extensions which the z196 processor does not implement:
181 OPENSSL_s390xcap="z196"
183 Disables the vector facility:
185 OPENSSL_s390xcap="stfle:~0:~0:~0x4000000000000000"
187 Disables the KM-XTS-AES and the KIMD-SHAKE function codes:
189 OPENSSL_s390xcap="km:~0x2800:~0;kimd:~0xc000000:~0"
193 [1] z/Architecture Principles of Operation, SA22-7832-12
197 Copyright 2018-2023 The OpenSSL Project Authors. All Rights Reserved.
199 Licensed under the Apache License 2.0 (the "License"). You may not use
200 this file except in compliance with the License. You can obtain a copy
201 in the file LICENSE in the source distribution or at
202 L<https://www.openssl.org/source/license.html>.