[ipxe-devel] EFI entropy commit

Michael Brown mcb30 at ipxe.org
Thu Nov 7 16:16:03 UTC 2013

On 01/11/13 18:24, Jarrod Johnson wrote:
> FWIW this is on IBM hardware, and it has gone 5 times in a row managing
> to print '2984' as the last sample out the serial port before
> rebooting.  I reduced to 2048 and it said tests passed at the end,
> though then it seems to pause and just say '2056 tests passed'  and then
> the iPXE banner with features listed.  Was there an expectation of a
> summary or just the samples?

Just the samples.  I have a Perl script to process that output and 
estimate the min-entropy.

> vmware guest in efi mode gets much much further but also seems to reboot
> suddenly (wasn't logging console output).  If I restrict sample count
> there it behaves the same as baremetal.
> I found that if I disabled the serial console redirection, the system
> gets further.  I'm wondering if the serial output was lagging and it is
> crashing at the next block generation....

Is this iPXE's serial console support, or EFI-level serial redirection?


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