Package: openssl Version: 1.1.0e-1 Severity: normal Dear Maintainer,
[Introduction] AMD added support in their processors for SHA Extensions[1] (CPU flag: sha_ni[2]) starting with Ryzen[3] CPU. Note that Ryzen CPU come in 64bit only. Current OpenSSL version in Ryzens still calls SHA for SSSE3 routine as result a number of extensions were effectively masked on Ryzen and shows no improvement. [1] /proc/cpuinfo processor : 0 vendor_id : AuthenticAMD cpu family : 23 model : 1 model name : AMD Ryzen 5 1600 Six-Core Processor flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good nopl nonstop_tsc extd_apicid aperfmperf eagerfpu pni pclmulqdq monitor ssse3 fma cx16 sse 4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw skinit wdt tce topoext perfctr_core perfctr_nb bpext perfctr_l2 mwaitx hw_pstate vmmcall fsgsbase bmi1 avx2 smep bmi2 rdseed adx smap clflusho pt sha_ni xsaveopt xsavec xgetbv1 clzero arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold [2] - sha_ni: SHA1/SHA256 Instruction Extensions [3] - https://en.wikipedia.org/wiki/Ryzen .... All models support: x87, MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AES, CLMUL, AVX, AVX2, FMA, CVT16/F16C, ABM, BMI1, BMI2, SHA.[5] .... [Program to performs the CPUID check] Reference : https://software.intel.com/en-us/articles/intel-sha-extensions .... Availability of the Intel® SHA Extensions on a particular processor can be determined by checking the SHA CPUID bit in CPUID.(EAX=07H, ECX=0):EBX.SHA [bit 29]. The following C function, using inline assembly, performs the CPUID check: -- int CheckForIntelShaExtensions() { int a, b, c, d; // Look for CPUID.7.0.EBX[29] // EAX = 7, ECX = 0 a = 7; c = 0; asm volatile ("cpuid" :"=a"(a), "=b"(b), "=c"(c), "=d"(d) :"a"(a), "c"(c) ); // Intel® SHA Extensions feature bit is EBX[29] return ((b >> 29) & 1); } -- On CPU with sha_ni the program return "1". Otherwise it return "0". [Upstream work] - GitHub PR : https://github.com/openssl/openssl/issues/2848 - Repository : https://github.com/openssl/openssl.git - Commits : 1aed5e1 crypto/x86*cpuid.pl: move extended feature detection. ## This fix moves extended feature detection past basic feature detection where it belongs. f8418d8 crypto/x86_64cpuid.pl: move extended feature detection upwards. ## This commit for x86_64cpuid.pl addressed the problem, but messed up processor vendor detection. -- System Information: Debian Release: 8.7 APT prefers stable APT policy: (500, 'stable') Architecture: amd64 (x86_64) Kernel: Linux 4.4.0-62-generic (SMP w/8 CPU cores) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system)
