that it creates a high system load, or on smaller systems
it is known to create out-of-memory situations during bootup.
+ To disable user space helper program execution at early boot
+ time specify an empty string here. This setting can be altered
+ via /proc/sys/kernel/hotplug or via /sys/kernel/uevent_helper
+ later at runtime.
+
config DEVTMPFS
bool "Maintain a devtmpfs filesystem to mount at /dev"
depends on HOTPLUG
default y
help
Say yes to avoid building firmware. Firmware is usually shipped
- with the driver, and only when updating the firmware a rebuild
- should be made.
- If unsure say Y here.
+ with the driver and only when updating the firmware should a
+ rebuild be made.
+ If unsure, say Y here.
config FW_LOADER
tristate "Userspace firmware loading support" if EXPERT
default y
---help---
- This option is provided for the case where no in-kernel-tree modules
- require userspace firmware loading support, but a module built outside
- the kernel tree does.
+ This option is provided for the case where none of the in-tree modules
+ require userspace firmware loading support, but a module built
+ out-of-tree does.
config FIRMWARE_IN_KERNEL
bool "Include in-kernel firmware blobs in kernel binary"
default y
help
The kernel source tree includes a number of firmware 'blobs'
- which are used by various drivers. The recommended way to
- use these is to run "make firmware_install" and to copy the
- resulting binary files created in usr/lib/firmware directory
- of the kernel tree to the /lib/firmware on your system so
+ that are used by various drivers. The recommended way to
+ use these is to run "make firmware_install", which, after
+ converting ihex files to binary, copies all of the needed
+ binary files in firmware/ to /lib/firmware/ on your system so
that they can be loaded by userspace helpers on request.
Enabling this option will build each required firmware blob
into the kernel directly, where request_firmware() will find
them without having to call out to userspace. This may be
- useful if your root file system requires a device which uses
- such firmware, and do not wish to use an initrd.
+ useful if your root file system requires a device that uses
+ such firmware and do not wish to use an initrd.
This single option controls the inclusion of firmware for
- every driver which uses request_firmware() and ships its
- firmware in the kernel source tree, to avoid a proliferation
- of 'Include firmware for xxx device' options.
+ every driver that uses request_firmware() and ships its
+ firmware in the kernel source tree, which avoids a
+ proliferation of 'Include firmware for xxx device' options.
Say 'N' and let firmware be loaded from userspace.
string "External firmware blobs to build into the kernel binary"
depends on FW_LOADER
help
- This option allows firmware to be built into the kernel, for the
- cases where the user either cannot or doesn't want to provide it from
+ This option allows firmware to be built into the kernel for the case
+ where the user either cannot or doesn't want to provide it from
userspace at runtime (for example, when the firmware in question is
required for accessing the boot device, and the user doesn't want to
use an initrd).
- This option is a string, and takes the (space-separated) names of the
- firmware files -- the same names which appear in MODULE_FIRMWARE()
+ This option is a string and takes the (space-separated) names of the
+ firmware files -- the same names that appear in MODULE_FIRMWARE()
and request_firmware() in the source. These files should exist under
the directory specified by the EXTRA_FIRMWARE_DIR option, which is
- by default the firmware/ subdirectory of the kernel source tree.
+ by default the firmware subdirectory of the kernel source tree.
- So, for example, you might set CONFIG_EXTRA_FIRMWARE="usb8388.bin",
- copy the usb8388.bin file into the firmware/ directory, and build the
- kernel. Then any request_firmware("usb8388.bin") will be
- satisfied internally without needing to call out to userspace.
+ For example, you might set CONFIG_EXTRA_FIRMWARE="usb8388.bin", copy
+ the usb8388.bin file into the firmware directory, and build the kernel.
+ Then any request_firmware("usb8388.bin") will be satisfied internally
+ without needing to call out to userspace.
WARNING: If you include additional firmware files into your binary
- kernel image which are not available under the terms of the GPL,
+ kernel image that are not available under the terms of the GPL,
then it may be a violation of the GPL to distribute the resulting
- image -- since it combines both GPL and non-GPL work. You should
+ image since it combines both GPL and non-GPL work. You should
consult a lawyer of your own before distributing such an image.
config EXTRA_FIRMWARE_DIR
help
This option controls the directory in which the kernel build system
looks for the firmware files listed in the EXTRA_FIRMWARE option.
- The default is the firmware/ directory in the kernel source tree,
- but by changing this option you can point it elsewhere, such as
- the /lib/firmware/ directory or another separate directory
- containing firmware files.
+ The default is firmware/ in the kernel source tree, but by changing
+ this option you can point it elsewhere, such as /lib/firmware/ or
+ some other directory containing the firmware files.
config DEBUG_DRIVER
bool "Driver Core verbose debug messages"
bool
default n
+config SOC_BUS
+ bool
+
source "drivers/base/regmap/Kconfig"
+config CMA
+ bool "Contiguous Memory Allocator (EXPERIMENTAL)"
+ depends on HAVE_DMA_CONTIGUOUS && HAVE_MEMBLOCK && EXPERIMENTAL
+ select MIGRATION
+ help
+ This enables the Contiguous Memory Allocator which allows drivers
+ to allocate big physically-contiguous blocks of memory for use with
+ hardware components that do not support I/O map nor scatter-gather.
+
+ For more information see <include/linux/dma-contiguous.h>.
+ If unsure, say "n".
+
+if CMA
+
+config CMA_DEBUG
+ bool "CMA debug messages (DEVELOPMENT)"
+ depends on DEBUG_KERNEL
+ help
+ Turns on debug messages in CMA. This produces KERN_DEBUG
+ messages for every CMA call as well as various messages while
+ processing calls such as dma_alloc_from_contiguous().
+ This option does not affect warning and error messages.
+
+comment "Default contiguous memory area size:"
+
+config CMA_SIZE_MBYTES
+ int "Size in Mega Bytes"
+ depends on !CMA_SIZE_SEL_PERCENTAGE
+ default 16
+ help
+ Defines the size (in MiB) of the default memory area for Contiguous
+ Memory Allocator.
+
+config CMA_SIZE_PERCENTAGE
+ int "Percentage of total memory"
+ depends on !CMA_SIZE_SEL_MBYTES
+ default 10
+ help
+ Defines the size of the default memory area for Contiguous Memory
+ Allocator as a percentage of the total memory in the system.
+
+choice
+ prompt "Selected region size"
+ default CMA_SIZE_SEL_ABSOLUTE
+
+config CMA_SIZE_SEL_MBYTES
+ bool "Use mega bytes value only"
+
+config CMA_SIZE_SEL_PERCENTAGE
+ bool "Use percentage value only"
+
+config CMA_SIZE_SEL_MIN
+ bool "Use lower value (minimum)"
+
+config CMA_SIZE_SEL_MAX
+ bool "Use higher value (maximum)"
+
+endchoice
+
+config CMA_ALIGNMENT
+ int "Maximum PAGE_SIZE order of alignment for contiguous buffers"
+ range 4 9
+ default 8
+ help
+ DMA mapping framework by default aligns all buffers to the smallest
+ PAGE_SIZE order which is greater than or equal to the requested buffer
+ size. This works well for buffers up to a few hundreds kilobytes, but
+ for larger buffers it just a memory waste. With this parameter you can
+ specify the maximum PAGE_SIZE order for contiguous buffers. Larger
+ buffers will be aligned only to this specified order. The order is
+ expressed as a power of two multiplied by the PAGE_SIZE.
+
+ For example, if your system defaults to 4KiB pages, the order value
+ of 8 means that the buffers will be aligned up to 1MiB only.
+
+ If unsure, leave the default value "8".
+
+config CMA_AREAS
+ int "Maximum count of the CMA device-private areas"
+ default 7
+ help
+ CMA allows to create CMA areas for particular devices. This parameter
+ sets the maximum number of such device private CMA areas in the
+ system.
+
+ If unsure, leave the default value "7".
+
+endif
+
endmenu
git.openpandora.org / pandora-kernel.git / blobdiff