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4 Commits

Author SHA1 Message Date
Michael Brown c3b4860ce3 [legal] Update FSF mailing address in GPL licence texts 
Suggested-by: Daniel P. Berrange <berrange@redhat.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
 2012-07-20 19:55:45 +01:00
Michael Brown 12002d6955 [time] Add RTC-based time source 
Add a time source using the CMOS RTC to obtain the current time.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
 2012-03-19 22:13:32 +00:00
Michael Brown 196f0bb081 [rng] Allow entropy_enable() to return an error 
Signed-off-by: Michael Brown <mcb30@ipxe.org>
 2012-03-18 17:05:37 +00:00
Michael Brown 05719804b9 [rng] Add RTC-based entropy source 
The RTC-based entropy source uses the nanosecond-scale CPU TSC to
measure the time between two 1kHz interrupts generated by the CMOS
RTC.  In a physical machine these clocks are driven from independent
crystals, resulting in some observable clock drift.  In a virtual
machine, the CMOS RTC is typically emulated using host-OS
constructions such as SIGALRM.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
 2012-02-28 11:18:48 +00:00