diff options
Diffstat (limited to 'vendor/golang.org/x/sys/cpu/cpu_linux_s390x.go')
-rw-r--r-- | vendor/golang.org/x/sys/cpu/cpu_linux_s390x.go | 121 |
1 files changed, 1 insertions, 120 deletions
diff --git a/vendor/golang.org/x/sys/cpu/cpu_linux_s390x.go b/vendor/golang.org/x/sys/cpu/cpu_linux_s390x.go index b88d6b8f6..1517ac61d 100644 --- a/vendor/golang.org/x/sys/cpu/cpu_linux_s390x.go +++ b/vendor/golang.org/x/sys/cpu/cpu_linux_s390x.go @@ -17,86 +17,7 @@ const ( hwcap_VXE = 8192 ) -// 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 -} - -// 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 -} - -// facility is a bit index for the named facility. -type facility uint8 - -const ( - // cryptography facilities - msa4 facility = 77 // message-security-assist extension 4 - msa8 facility = 146 // message-security-assist extension 8 -) - -// 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 -} - -func doinit() { +func initS390Xbase() { // test HWCAP bit vector has := func(featureMask uint) bool { return hwCap&featureMask == featureMask @@ -116,44 +37,4 @@ func doinit() { if S390X.HasVX { S390X.HasVXE = has(hwcap_VXE) } - - // 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...) - } } |