From 05719804b9e06eabf152ccf59059fc39fd1cc08c Mon Sep 17 00:00:00 2001 From: Michael Brown Date: Sun, 19 Feb 2012 22:24:42 +0000 Subject: [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 --- src/config/defaults/pcbios.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'src/config') diff --git a/src/config/defaults/pcbios.h b/src/config/defaults/pcbios.h index fb44d0e16..17e6ef636 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 */ -- cgit v1.2.3-55-g7522