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Ryan Houdek
b34c23fe3d
The Oryon is the first CPU we know of that implemented support for the RNG extension. It also has an errata where reading the RNDRRS register never returns success. X86's RDSEED guarantees forward progress with enough retries. When an x86 processor messed this up at one point, some Linux systems would infinite loop (presumably when something in boot was filling an entropy pool). This required a microcode change to fix that processor. The rdseed unittest infinite loops on this platform if RNG was exposed.