24e094ef5e
Move cpu_load to lib/os, as this functionality on its own does not justify being a subsystem on its own. Fixes #95498 Signed-off-by: Anas Nashif <anas.nashif@intel.com>
157 lines
4.6 KiB
Plaintext
157 lines
4.6 KiB
Plaintext
# Copyright (c) 2016 Intel Corporation
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# SPDX-License-Identifier: Apache-2.0
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menu "OS Support Library"
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config FDTABLE
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bool "File descriptor table"
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help
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This file provides generic file descriptor table implementation, suitable
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for any I/O object implementing POSIX I/O semantics (i.e. read/write +
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aux operations).
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config ZVFS_OPEN_MAX
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int "Maximum number of open file descriptors"
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default 0
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help
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Maximum number of open file descriptors, this includes
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files, sockets, special devices, etc. If subsystems
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specify ZVFS_OPEN_ADD_SIZE_* options, these will be added together
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and the sum will be compared to the ZVFS_OPEN_MAX value.
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If the sum is greater than the ZVFS_OPEN_MAX option (even if this
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has the default 0 value), then the actual file descriptor count will be
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rounded up to the sum of the individual requirements (unless the
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ZVFS_OPEN_IGNORE_MIN option is enabled). If the final value, after
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considering both this option as well as sum of the custom
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requirements, ends up being zero, then no file descriptors will be
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available.
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config ZVFS_OPEN_IGNORE_MIN
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bool "Ignore the minimum fd count requirement"
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help
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This option can be set to force setting a smaller file descriptor
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count than what's specified by enabled subsystems. This can be useful
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when optimizing memory usage and a more precise minimum fd count
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is known for a given application.
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config PRINTK_SYNC
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bool "Serialize printk() calls"
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default y if SMP && MP_MAX_NUM_CPUS > 1 && !(EFI_CONSOLE && LOG)
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help
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When true, a spinlock will be taken around the output from a
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single printk() call, preventing the output data from
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interleaving with concurrent usage from another CPU or an
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preempting interrupt.
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config MPSC_PBUF
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bool "Multi producer, single consumer packet buffer"
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select TIMEOUT_64BIT
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help
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Enable usage of mpsc packet buffer. Packet buffer is capable of
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storing variable length packets in a circular way and operate directly
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on the buffer memory.
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config SPSC_PBUF
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bool "Single producer, single consumer packet buffer"
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help
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Enable usage of spsc packet buffer. Packet buffer is capable of
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storing variable length packets in a circular way and operate directly
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on the buffer memory.
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if SPSC_PBUF
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choice SPSC_PBUF_CACHE_HANDLING
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prompt "Cache handling"
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default SPSC_PBUF_CACHE_ALWAYS if SPSC_PBUF_USE_CACHE && !SPSC_PBUF_NO_CACHE
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default SPSC_PBUF_CACHE_NEVER if !SPSC_PBUF_USE_CACHE && SPSC_PBUF_NO_CACHE
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default SPSC_PBUF_CACHE_FLAG
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config SPSC_PBUF_CACHE_FLAG
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bool "Use cache flag"
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help
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Use instance specific configuration flag for cache handling.
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config SPSC_PBUF_CACHE_ALWAYS
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bool "Always handle cache"
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help
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Handle cache writeback and invalidation for all instances. Option used
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to avoid runtime check and thus reduce memory footprint. Beware! It shall
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be used only if all packet buffer instances are used for data sharing
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between cores.
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config SPSC_PBUF_CACHE_NEVER
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bool "Never handle cache"
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help
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Discar cache handling for all instances. Option used to avoid runtime
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check and thus reduce memory footprint.
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endchoice
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config SPSC_PBUF_USE_CACHE
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bool
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config SPSC_PBUF_NO_CACHE
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bool
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if SPSC_PBUF_CACHE_FLAG || SPSC_PBUF_CACHE_ALWAYS
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config SPSC_PBUF_REMOTE_DCACHE_LINE
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int "Remote cache line size"
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default 32
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help
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If a packet buffer is used for data sharing between two cores then
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this value should be set to the data cache line size of the remote core.
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If local data cache line is detected at runtime then it should be
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maximum of local and remote line size.
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endif # SPSC_PBUF_CACHE_FLAG || SPSC_PBUF_CACHE_ALWAYS
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config SPSC_PBUF_UTILIZATION
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bool "Track maximum utilization"
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help
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When enabled, maximum utilization is tracked which can be used to
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determine the size of the packet buffer.
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endif # SPSC_PBUF
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if MPSC_PBUF
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config MPSC_CLEAR_ALLOCATED
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bool "Clear allocated packet"
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help
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When enabled packet space is zeroed before returning from allocation.
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endif
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if SCHED_DEADLINE
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config P4WQ_INIT_STAGE_EARLY
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bool "Early initialization of P4WQ threads"
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help
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Initialize P4WQ threads early so that the P4WQ can be used on devices
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initialization sequence.
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endif
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config REBOOT
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bool "Reboot functionality"
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help
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Enable the sys_reboot() API. Enabling this can drag in other subsystems
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needed to perform a "safe" reboot (e.g. to stop the system clock before
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issuing a reset).
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config HAS_POWEROFF
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bool
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help
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Option to signal that power off functionality is implemented.
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config POWEROFF
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bool "Power off functionality"
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depends on HAS_POWEROFF
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help
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Enable support for system power off.
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rsource "Kconfig.cbprintf"
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rsource "zvfs/Kconfig"
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rsource "cpu_load/Kconfig"
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endmenu
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