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Diffstat (limited to 'Documentation/kernel-parameters.txt')
| -rw-r--r-- | Documentation/kernel-parameters.txt | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index cfb2c0f1a4a8..87d40a72f6a1 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -1454,6 +1454,41 @@ bytes respectively. Such letter suffixes can also be entirely omitted. In such case C2/C3 won't be used again. idle=nomwait: Disable mwait for CPU C-states + ieee754= [MIPS] Select IEEE Std 754 conformance mode + Format: { strict | legacy | 2008 | relaxed } + Default: strict + + Choose which programs will be accepted for execution + based on the IEEE 754 NaN encoding(s) supported by + the FPU and the NaN encoding requested with the value + of an ELF file header flag individually set by each + binary. Hardware implementations are permitted to + support either or both of the legacy and the 2008 NaN + encoding mode. + + Available settings are as follows: + strict accept binaries that request a NaN encoding + supported by the FPU + legacy only accept legacy-NaN binaries, if supported + by the FPU + 2008 only accept 2008-NaN binaries, if supported + by the FPU + relaxed accept any binaries regardless of whether + supported by the FPU + + The FPU emulator is always able to support both NaN + encodings, so if no FPU hardware is present or it has + been disabled with 'nofpu', then the settings of + 'legacy' and '2008' strap the emulator accordingly, + 'relaxed' straps the emulator for both legacy-NaN and + 2008-NaN, whereas 'strict' enables legacy-NaN only on + legacy processors and both NaN encodings on MIPS32 or + MIPS64 CPUs. + + The setting for ABS.fmt/NEG.fmt instruction execution + mode generally follows that for the NaN encoding, + except where unsupported by hardware. + ignore_loglevel [KNL] Ignore loglevel setting - this will print /all/ kernel messages to the console. Useful for debugging. |