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| author | Michael Brown | 2012-02-19 23:24:42 +0100 |
|---|---|---|
| committer | Michael Brown | 2012-02-28 12:18:48 +0100 |
| commit | 05719804b9e06eabf152ccf59059fc39fd1cc08c (patch) | |
| tree | c56e56107ef10f59c53a069fb8bd17eeb54903bd /src/config/defaults | |
| parent | [rng] Add entropy sample generator (diff) | |
| download | ipxe-05719804b9e06eabf152ccf59059fc39fd1cc08c.tar.gz ipxe-05719804b9e06eabf152ccf59059fc39fd1cc08c.tar.xz ipxe-05719804b9e06eabf152ccf59059fc39fd1cc08c.zip | |
[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>
Diffstat (limited to 'src/config/defaults')
| -rw-r--r-- | src/config/defaults/pcbios.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/config/defaults/pcbios.h b/src/config/defaults/pcbios.h index fb44d0e1..17e6ef63 100644 --- a/src/config/defaults/pcbios.h +++ b/src/config/defaults/pcbios.h @@ -18,7 +18,7 @@ FILE_LICENCE ( GPL2_OR_LATER ); #define UMALLOC_MEMTOP #define SMBIOS_PCBIOS #define SANBOOT_PCBIOS -#define ENTROPY_NULL +#define ENTROPY_RTC #define IMAGE_ELF /* ELF image support */ #define IMAGE_MULTIBOOT /* MultiBoot image support */ |