Source file src/internal/cpu/cpu_s390x.go
1
2
3
4
5 package cpu
6
7 const CacheLinePadSize = 256
8
9
10
11 func bitIsSet(bits []uint64, index uint) bool {
12 return bits[index/64]&((1<<63)>>(index%64)) != 0
13 }
14
15
16 type function uint8
17
18 const (
19
20 aes128 function = 18
21 aes192 function = 19
22 aes256 function = 20
23
24
25 sha1 function = 1
26 sha256 function = 2
27 sha512 function = 3
28 sha3_224 function = 32
29 sha3_256 function = 33
30 sha3_384 function = 34
31 sha3_512 function = 35
32 shake128 function = 36
33 shake256 function = 37
34
35
36 ghash function = 65
37 )
38
39 const (
40
41 ecdsaVerifyP256 function = 1
42 ecdsaVerifyP384 function = 2
43 ecdsaVerifyP521 function = 3
44 ecdsaSignP256 function = 9
45 ecdsaSignP384 function = 10
46 ecdsaSignP521 function = 11
47 eddsaVerifyEd25519 function = 32
48 eddsaVerifyEd448 function = 36
49 eddsaSignEd25519 function = 40
50 eddsaSignEd448 function = 44
51 )
52
53
54
55
56 type queryResult struct {
57 bits [2]uint64
58 }
59
60
61 func (q *queryResult) Has(fns ...function) bool {
62 if len(fns) == 0 {
63 panic("no function codes provided")
64 }
65 for _, f := range fns {
66 if !bitIsSet(q.bits[:], uint(f)) {
67 return false
68 }
69 }
70 return true
71 }
72
73
74 type facility uint8
75
76 const (
77
78 zarch facility = 1
79 stflef facility = 7
80 ldisp facility = 18
81 eimm facility = 21
82
83
84 dfp facility = 42
85 etf3eh facility = 30
86
87
88 msa facility = 17
89 msa3 facility = 76
90 msa4 facility = 77
91 msa5 facility = 57
92 msa8 facility = 146
93 msa9 facility = 155
94
95
96 vxe facility = 135
97
98
99
100 )
101
102
103
104
105 type facilityList struct {
106 bits [4]uint64
107 }
108
109
110 func (s *facilityList) Has(fs ...facility) bool {
111 if len(fs) == 0 {
112 panic("no facility bits provided")
113 }
114 for _, f := range fs {
115 if !bitIsSet(s.bits[:], uint(f)) {
116 return false
117 }
118 }
119 return true
120 }
121
122
123
124 func stfle() facilityList
125 func kmQuery() queryResult
126 func kmcQuery() queryResult
127 func kmctrQuery() queryResult
128 func kmaQuery() queryResult
129 func kimdQuery() queryResult
130 func klmdQuery() queryResult
131 func kdsaQuery() queryResult
132
133 func doinit() {
134 options = []option{
135 {Name: "zarch", Feature: &S390X.HasZARCH},
136 {Name: "stfle", Feature: &S390X.HasSTFLE},
137 {Name: "ldisp", Feature: &S390X.HasLDISP},
138 {Name: "msa", Feature: &S390X.HasMSA},
139 {Name: "eimm", Feature: &S390X.HasEIMM},
140 {Name: "dfp", Feature: &S390X.HasDFP},
141 {Name: "etf3eh", Feature: &S390X.HasETF3EH},
142 {Name: "vx", Feature: &S390X.HasVX},
143 {Name: "vxe", Feature: &S390X.HasVXE},
144 {Name: "kdsa", Feature: &S390X.HasKDSA},
145 }
146
147 aes := []function{aes128, aes192, aes256}
148 facilities := stfle()
149
150 S390X.HasZARCH = facilities.Has(zarch)
151 S390X.HasSTFLE = facilities.Has(stflef)
152 S390X.HasLDISP = facilities.Has(ldisp)
153 S390X.HasEIMM = facilities.Has(eimm)
154 S390X.HasDFP = facilities.Has(dfp)
155 S390X.HasETF3EH = facilities.Has(etf3eh)
156 S390X.HasMSA = facilities.Has(msa)
157
158 if S390X.HasMSA {
159
160 km, kmc := kmQuery(), kmcQuery()
161 S390X.HasAES = km.Has(aes...)
162 S390X.HasAESCBC = kmc.Has(aes...)
163 if facilities.Has(msa4) {
164 kmctr := kmctrQuery()
165 S390X.HasAESCTR = kmctr.Has(aes...)
166 }
167 if facilities.Has(msa8) {
168 kma := kmaQuery()
169 S390X.HasAESGCM = kma.Has(aes...)
170 }
171
172
173 kimd := kimdQuery()
174 klmd := klmdQuery()
175 S390X.HasSHA1 = kimd.Has(sha1) && klmd.Has(sha1)
176 S390X.HasSHA256 = kimd.Has(sha256) && klmd.Has(sha256)
177 S390X.HasSHA512 = kimd.Has(sha512) && klmd.Has(sha512)
178 S390X.HasGHASH = kimd.Has(ghash)
179 sha3 := []function{
180 sha3_224, sha3_256, sha3_384, sha3_512,
181 shake128, shake256,
182 }
183 S390X.HasSHA3 = kimd.Has(sha3...) && klmd.Has(sha3...)
184 S390X.HasKDSA = facilities.Has(msa9)
185 if S390X.HasKDSA {
186 kdsa := kdsaQuery()
187 S390X.HasECDSA = kdsa.Has(ecdsaVerifyP256, ecdsaSignP256, ecdsaVerifyP384, ecdsaSignP384, ecdsaVerifyP521, ecdsaSignP521)
188 S390X.HasEDDSA = kdsa.Has(eddsaVerifyEd25519, eddsaSignEd25519, eddsaVerifyEd448, eddsaSignEd448)
189 }
190 }
191 if S390X.HasVX {
192 S390X.HasVXE = facilities.Has(vxe)
193 }
194 }
195
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