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Diffstat (limited to 'src/build-data/buildh.in')
| -rw-r--r-- | src/build-data/buildh.in | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/src/build-data/buildh.in b/src/build-data/buildh.in index 49ef89146..8b950177f 100644 --- a/src/build-data/buildh.in +++ b/src/build-data/buildh.in @@ -184,6 +184,17 @@ #define BOTAN_TARGET_CPU_HAS_KNOWN_ENDIANNESS #endif +/* +* If no way of dynamically determining the cache line size for the +* system exists, this value is used as the default. Used by the side +* channel countermeasures rather than for alignment purposes, so it is +* better to be on the smaller side if the exact value cannot be +* determined. Typically 32 or 64 bytes on modern CPUs. +*/ +#if !defined(BOTAN_TARGET_CPU_DEFAULT_CACHE_LINE_SIZE) + #define BOTAN_TARGET_CPU_DEFAULT_CACHE_LINE_SIZE 32 +#endif + %{target_compiler_defines} #if defined(_MSC_VER) |