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"Interestingly enough, there are actually comparable Intel SHA extensions to the ARM equivalents. Linux 4.4 has added support for this but so far we have not be

by mrb 10y ago

"Interestingly enough, there are actually comparable Intel SHA extensions to the ARM equivalents. Linux 4.4 has added support for this but so far we have not been able to identify any CPUs that will actually run this code." Intel Goldmont is the only microarch that implements the instructions. It was "released" in April: http://www.extremetech.com/computing/226800-intels-new-low-cost-apollo-lake-platform-skylake-graphics-new-goldmont-cpu http://www.extremetech.com/computing/226800-intels-new-low-c... But it is one of these annoying soft launches where the processors are not for sale anywhere, the specs are incomplete, and even ark.intel.com doesn't know about them. sigh

kalden_ 10y ago
It seemed to me that some Xeons had those since 2014. See https://software.intel.com/en-us/isa-extensions/intel-sha https://software.intel.com/en-us/isa-extensions/intel-sha Should something be understood instead?
- mrb 10y ago
  Huh you seem right. Only the multi-socket Haswell seems to have them (E7-xxxxv3 and E5-26xxv3). And now Intel re-introduce the SHA instructions in some low-power low-end CPUs, but not for any desktop or single-socket server CPU? What a bizarre case of feature fragmentation. Typical Intel.
- pbsd 10y ago
  I think even Intel is confused about their own extensions at this point. The E7 and E5 Xeons are Haswell systems that slightly speed up SHA-256 and 512 with the introduced BMI2 RORX instruction. As far as I know there are no SHA extensions before Goldmont, as mrb said, and in Cannonlake for non-low-power chips.
nickpsecurity 10y ago
The original one, that I'm aware, was VIA's C3 and such processors with Padlock Encryption. Came in the little Artigo computers I used in designs that gave me, for $300, a 1GHz processor at 25W, hypervisor support, crypto acceleration (incl RSA), and a TRNG. Bad little systems years ago when I was into them.
y4m4b4 10y ago
Thanks this is a nice share, we are definitely looking forward to this.

by mrb 10y ago

kalden_ 10y ago

It seemed to me that some Xeons had those since 2014. See https://software.intel.com/en-us/isa-extensions/intel-sha https://software.intel.com/en-us/isa-extensions/intel-sha Should something be understood instead?

mrb 10y ago
Huh you seem right. Only the multi-socket Haswell seems to have them (E7-xxxxv3 and E5-26xxv3). And now Intel re-introduce the SHA instructions in some low-power low-end CPUs, but not for any desktop or single-socket server CPU? What a bizarre case of feature fragmentation. Typical Intel.
pbsd 10y ago
I think even Intel is confused about their own extensions at this point. The E7 and E5 Xeons are Haswell systems that slightly speed up SHA-256 and 512 with the introduced BMI2 RORX instruction. As far as I know there are no SHA extensions before Goldmont, as mrb said, and in Cannonlake for non-low-power chips.

nickpsecurity 10y ago

The original one, that I'm aware, was VIA's C3 and such processors with Padlock Encryption. Came in the little Artigo computers I used in designs that gave me, for $300, a 1GHz processor at 25W, hypervisor support, crypto acceleration (incl RSA), and a TRNG. Bad little systems years ago when I was into them.

y4m4b4 10y ago

Thanks this is a nice share, we are definitely looking forward to this.