--- /dev/null
+// Copyright 2020 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package cpu
+
+const cacheLineSize = 256
+
+func initOptions() {
+ options = []option{
+ {Name: "zarch", Feature: &S390X.HasZARCH, Required: true},
+ {Name: "stfle", Feature: &S390X.HasSTFLE, Required: true},
+ {Name: "ldisp", Feature: &S390X.HasLDISP, Required: true},
+ {Name: "eimm", Feature: &S390X.HasEIMM, Required: true},
+ {Name: "dfp", Feature: &S390X.HasDFP},
+ {Name: "etf3eh", Feature: &S390X.HasETF3EH},
+ {Name: "msa", Feature: &S390X.HasMSA},
+ {Name: "aes", Feature: &S390X.HasAES},
+ {Name: "aescbc", Feature: &S390X.HasAESCBC},
+ {Name: "aesctr", Feature: &S390X.HasAESCTR},
+ {Name: "aesgcm", Feature: &S390X.HasAESGCM},
+ {Name: "ghash", Feature: &S390X.HasGHASH},
+ {Name: "sha1", Feature: &S390X.HasSHA1},
+ {Name: "sha256", Feature: &S390X.HasSHA256},
+ {Name: "sha3", Feature: &S390X.HasSHA3},
+ {Name: "sha512", Feature: &S390X.HasSHA512},
+ {Name: "vx", Feature: &S390X.HasVX},
+ {Name: "vxe", Feature: &S390X.HasVXE},
+ }
+}
+
+// bitIsSet reports whether the bit at index is set. The bit index
+// is in big endian order, so bit index 0 is the leftmost bit.
+func bitIsSet(bits []uint64, index uint) bool {
+ return bits[index/64]&((1<<63)>>(index%64)) != 0
+}
+
+// facility is a bit index for the named facility.
+type facility uint8
+
+const (
+ // mandatory facilities
+ zarch facility = 1 // z architecture mode is active
+ stflef facility = 7 // store-facility-list-extended
+ ldisp facility = 18 // long-displacement
+ eimm facility = 21 // extended-immediate
+
+ // miscellaneous facilities
+ dfp facility = 42 // decimal-floating-point
+ etf3eh facility = 30 // extended-translation 3 enhancement
+
+ // cryptography facilities
+ msa facility = 17 // message-security-assist
+ msa3 facility = 76 // message-security-assist extension 3
+ msa4 facility = 77 // message-security-assist extension 4
+ msa5 facility = 57 // message-security-assist extension 5
+ msa8 facility = 146 // message-security-assist extension 8
+ msa9 facility = 155 // message-security-assist extension 9
+
+ // vector facilities
+ vx facility = 129 // vector facility
+ vxe facility = 135 // vector-enhancements 1
+ vxe2 facility = 148 // vector-enhancements 2
+)
+
+// facilityList contains the result of an STFLE call.
+// Bits are numbered in big endian order so the
+// leftmost bit (the MSB) is at index 0.
+type facilityList struct {
+ bits [4]uint64
+}
+
+// Has reports whether the given facilities are present.
+func (s *facilityList) Has(fs ...facility) bool {
+ if len(fs) == 0 {
+ panic("no facility bits provided")
+ }
+ for _, f := range fs {
+ if !bitIsSet(s.bits[:], uint(f)) {
+ return false
+ }
+ }
+ return true
+}
+
+// function is the code for the named cryptographic function.
+type function uint8
+
+const (
+ // KM{,A,C,CTR} function codes
+ aes128 function = 18 // AES-128
+ aes192 function = 19 // AES-192
+ aes256 function = 20 // AES-256
+
+ // K{I,L}MD function codes
+ sha1 function = 1 // SHA-1
+ sha256 function = 2 // SHA-256
+ sha512 function = 3 // SHA-512
+ sha3_224 function = 32 // SHA3-224
+ sha3_256 function = 33 // SHA3-256
+ sha3_384 function = 34 // SHA3-384
+ sha3_512 function = 35 // SHA3-512
+ shake128 function = 36 // SHAKE-128
+ shake256 function = 37 // SHAKE-256
+
+ // KLMD function codes
+ ghash function = 65 // GHASH
+)
+
+// queryResult contains the result of a Query function
+// call. Bits are numbered in big endian order so the
+// leftmost bit (the MSB) is at index 0.
+type queryResult struct {
+ bits [2]uint64
+}
+
+// Has reports whether the given functions are present.
+func (q *queryResult) Has(fns ...function) bool {
+ if len(fns) == 0 {
+ panic("no function codes provided")
+ }
+ for _, f := range fns {
+ if !bitIsSet(q.bits[:], uint(f)) {
+ return false
+ }
+ }
+ return true
+}
+
+func doinit() {
+ initS390Xbase()
+
+ // We need implementations of stfle, km and so on
+ // to detect cryptographic features.
+ if !haveAsmFunctions() {
+ return
+ }
+
+ // optional cryptographic functions
+ if S390X.HasMSA {
+ aes := []function{aes128, aes192, aes256}
+
+ // cipher message
+ km, kmc := kmQuery(), kmcQuery()
+ S390X.HasAES = km.Has(aes...)
+ S390X.HasAESCBC = kmc.Has(aes...)
+ if S390X.HasSTFLE {
+ facilities := stfle()
+ if facilities.Has(msa4) {
+ kmctr := kmctrQuery()
+ S390X.HasAESCTR = kmctr.Has(aes...)
+ }
+ if facilities.Has(msa8) {
+ kma := kmaQuery()
+ S390X.HasAESGCM = kma.Has(aes...)
+ }
+ }
+
+ // compute message digest
+ kimd := kimdQuery() // intermediate (no padding)
+ klmd := klmdQuery() // last (padding)
+ S390X.HasSHA1 = kimd.Has(sha1) && klmd.Has(sha1)
+ S390X.HasSHA256 = kimd.Has(sha256) && klmd.Has(sha256)
+ S390X.HasSHA512 = kimd.Has(sha512) && klmd.Has(sha512)
+ S390X.HasGHASH = kimd.Has(ghash) // KLMD-GHASH does not exist
+ sha3 := []function{
+ sha3_224, sha3_256, sha3_384, sha3_512,
+ shake128, shake256,
+ }
+ S390X.HasSHA3 = kimd.Has(sha3...) && klmd.Has(sha3...)
+ }
+}
projects / dotfiles / .git / blobdiff