kconfig: Improve architecture floating point symbol descriptions
This commit reworks the symbol descriptions for `CONFIG_FPU` and `CONFIG_FP_SHARING`, in order to provide more details and clarify any ambiguity between the two symbols. Signed-off-by: Stephanos Ioannidis <root@stephanos.io>
This commit is contained in:
parent
0e6ede8929
commit
4f4e85c035
1 changed files with 24 additions and 9 deletions
33
arch/Kconfig
33
arch/Kconfig
|
@ -520,23 +520,38 @@ config MPU_GAP_FILLING
|
|||
documentation for more information on how this option is
|
||||
used.
|
||||
|
||||
menuconfig FPU
|
||||
bool "Floating point"
|
||||
menu "Floating Point Options"
|
||||
|
||||
config FPU
|
||||
bool "Enable floating point unit (FPU)"
|
||||
depends on CPU_HAS_FPU
|
||||
depends on ARC || ARM || RISCV || X86
|
||||
help
|
||||
This option allows threads to use the floating point registers.
|
||||
By default, only a single thread may use the registers.
|
||||
This option enables the hardware Floating Point Unit (FPU), in order to
|
||||
support using the floating point registers and instructions.
|
||||
|
||||
Disabling this option means that any thread that uses a
|
||||
floating point register will get a fatal exception.
|
||||
When this option is enabled, by default, threads may use the floating
|
||||
point registers only in an exclusive manner, and this usually means that
|
||||
only one thread may perform floating point operations.
|
||||
|
||||
If it is necessary for multiple threads to perform concurrent floating
|
||||
point operations, the "FPU register sharing" option must be enabled to
|
||||
preserve the floating point registers across context switches.
|
||||
|
||||
Note that this option cannot be selected for the platforms that do not
|
||||
include a hardware floating point unit; the floating point support for
|
||||
those platforms is dependent on the availability of the toolchain-
|
||||
provided software floating point library.
|
||||
|
||||
config FP_SHARING
|
||||
bool "Floating point register sharing"
|
||||
bool "FPU register sharing"
|
||||
depends on FPU
|
||||
help
|
||||
This option allows multiple threads to use the floating point
|
||||
registers.
|
||||
This option enables preservation of the hardware floating point registers
|
||||
across context switches to allow multiple threads to perform concurrent
|
||||
floating point operations.
|
||||
|
||||
endmenu
|
||||
|
||||
config ARCH
|
||||
string
|
||||
|
|
Loading…
Add table
Add a link
Reference in a new issue