Merge tag 'gpio-v4.5-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux...

[deliverable/linux.git] / Documentation / kernel-parameters.txt

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index cfb2c0f1a4a89237ce131999d7b1cc03aff178b4..9a53c929f017d16527270bc2244352edf1d34cd8 100644 (file)
--- 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.
@@ -1461,6 +1496,11 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                        could change it dynamically, usually by
                        /sys/module/printk/parameters/ignore_loglevel.
 
+       ignore_rlimit_data
+                       Ignore RLIMIT_DATA setting for data mappings,
+                       print warning at first misuse.  Can be changed via
+                       /sys/module/kernel/parameters/ignore_rlimit_data.
+
        ihash_entries=  [KNL]
                        Set number of hash buckets for inode cache.
 
@@ -4195,6 +4235,17 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                        The default value of this parameter is determined by
                        the config option CONFIG_WQ_POWER_EFFICIENT_DEFAULT.
 
+       workqueue.debug_force_rr_cpu
+                       Workqueue used to implicitly guarantee that work
+                       items queued without explicit CPU specified are put
+                       on the local CPU.  This guarantee is no longer true
+                       and while local CPU is still preferred work items
+                       may be put on foreign CPUs.  This debug option
+                       forces round-robin CPU selection to flush out
+                       usages which depend on the now broken guarantee.
+                       When enabled, memory and cache locality will be
+                       impacted.
+
        x2apic_phys     [X86-64,APIC] Use x2apic physical mode instead of
                        default x2apic cluster mode on platforms
                        supporting x2apic.