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| author | Michael Brown | 2015-04-14 11:56:20 +0200 |
|---|---|---|
| committer | Michael Brown | 2015-04-14 12:37:38 +0200 |
| commit | eb2252fd7a580a625d426562b9498f28226a75e7 (patch) | |
| tree | 24eb36a5ade629664d3a6c9921f0c5e9bf6abdb8 /src/include/ipxe/efi | |
| parent | [util] Add ability to dump PCI device ID list (diff) | |
| download | ipxe-eb2252fd7a580a625d426562b9498f28226a75e7.tar.gz ipxe-eb2252fd7a580a625d426562b9498f28226a75e7.tar.xz ipxe-eb2252fd7a580a625d426562b9498f28226a75e7.zip | |
[efi] Add EFI entropy source
Originally-implemented-by: Jarrod Johnson <jbjohnso@us.ibm.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Diffstat (limited to 'src/include/ipxe/efi')
| -rw-r--r-- | src/include/ipxe/efi/efi_entropy.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/src/include/ipxe/efi/efi_entropy.h b/src/include/ipxe/efi/efi_entropy.h new file mode 100644 index 000000000..39a667355 --- /dev/null +++ b/src/include/ipxe/efi/efi_entropy.h @@ -0,0 +1,35 @@ +#ifndef _IPXE_EFI_ENTROPY_H +#define _IPXE_EFI_ENTROPY_H + +/** @file + * + * EFI entropy source + * + */ + +FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); + +#include <stdint.h> + +#ifdef ENTROPY_EFI +#define ENTROPY_PREFIX_efi +#else +#define ENTROPY_PREFIX_efi __efi_ +#endif + +/** + * min-entropy per sample + * + * @ret min_entropy min-entropy of each sample + */ +static inline __always_inline double +ENTROPY_INLINE ( efi, min_entropy_per_sample ) ( void ) { + + /* We use essentially the same mechanism as for the BIOS + * RTC-based entropy source, and so assume the same + * min-entropy per sample. + */ + return 1.3; +} + +#endif /* _IPXE_EFI_ENTROPY_H */ |