russell@macos-catalina ~> zfs --version
zfs-macOS-2.1.0-1
zfs-kmod-2.1.0-1
russell@macos-catalina ~> sysctl kstat.zfs | grep "_impl:"
kstat.zfs.darwin.tunable.zfs_vdev_raidz_impl: cycle [fastest] original scalar sse2
kstat.zfs.darwin.tunable.icp_gcm_impl: cycle [fastest] generic
kstat.zfs.darwin.tunable.icp_aes_impl: cycle [fastest] generic x86_64
kstat.zfs.darwin.tunable.zfs_fletcher_4_impl: [fastest] scalar superscalar superscalar4 sse2
# sysctl zfs.kext_version
zfs.kext_version: 2.1.99-102_gdbadb4efcb
2022-01-11 09:29:25.663 Df kernel.development[0:8cbcf] (zfs) <zfs`spl_cpuid_features (spl-processor.c:78)> spl_cpuid_features: FEATURES fffa320b1f8bfbff
2022-01-11 09:29:25.663 Df kernel.development[0:8cbcf] (zfs) <zfs`spl_cpuid_features (spl-processor.c:81)> AES is YES: testing bit 200000000000000
2022-01-11 09:29:25.663 Df kernel.development[0:8cbcf] (zfs) <zfs`spl_cpuid_features (spl-processor.c:88)> spl_cpuid_features: LEAF7 9c27ab
# sysctl machdep.cpu.features machdep.cpu.leaf7_features
machdep.cpu.features: FPU VME DE PSE TSC MSR PAE MCE CX8 APIC SEP MTRR PGE MCA CMOV PAT PSE36 CLFSH MMX FXSR SSE SSE2 SS HTT SSE3 PCLMULQDQ MON SSSE3 FMA CX16 SSE4.1 SSE4.2 x2APIC MOVBE POPCNT AES VMM PCID XSAVE OSXSAVE TSCTMR AVX1.0 RDRAND F16C
machdep.cpu.leaf7_features: RDWRFSGS TSC_THREAD_OFFSET BMI1 AVX2 SMEP BMI2 ERMS INVPCID FPU_CSDS RDSEED ADX SMAP CLFSOPT MDCLEAR IBRS STIBP L1DF ACAPMSR SSBD
stored in EBX, EDX, ECX (in that order).
_spl_cpuid(1, a, b, c, d);
_spl_cpuid_features = d | (c << 32);
(spl-processor.c:84)> spl_cpuid_features: FEATURES 1f8bfbfffffa320b
(spl-processor.c:87)> AES is YES: testing bit 200000000000000
(spl-processor.c:94)> spl_cpuid_features: LEAF7 bc000400009c27ab
russell@macos-catalina ~> zfs --version
zfs-macOS-2.1.0-1
zfs-kmod-2.1.0-1
russell@macos-catalina ~> sysctl zfs.kext_version
zfs.kext_version: 2.1.0-1
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