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/linux/Documentation/filesystems/
H A D	zonefs.rst	1 .. SPDX-License-Identifier: GPL-2.0 4 ZoneFS - Zone filesystem for Zoned block devices 11 as a file. Unlike a regular POSIX-compliant file system with native zoned block 12 device support (e.g. f2fs), zonefs does not hide the sequential write 14 write zones of the device must be written sequentially starting from the end 15 of the file (append only writes). 18 than to a full-featured POSIX file system. The goal of zonefs is to simplify 22 example of this approach is the implementation of LSM (log-structured merge) 31 ------------------- 38 conventional zones. Any read or write access can be executed, similarly to a [all …]
/linux/include/uapi/linux/
H A D	virtio_mmio.h	`42 /* Magic value ("virt" string) - Read Only / 45 / Virtio device version - Read Only / 48 / Virtio device ID - Read Only / 51 / Virtio vendor ID - Read Only / 55 (32 bits per set) - Read Only / 58 / Device (host) features set selector - Write Only / 62 (32 bits per set) - Write Only / 65 / Activated features set selector - Write Only / 69 #ifndef VIRTIO_MMIO_NO_LEGACY / LEGACY DEVICES ONLY! / 71 / Guest's memory page size in bytes - Write Only */ [all …]`
H A D	virtio_pci.h	47 /* A 32-bit r/o bitmask of the features supported by the host / 50 / A 32-bit r/w bitmask of features activated by the guest / 53 / A 32-bit r/w PFN for the currently selected queue / 56 / A 16-bit r/o queue size for the currently selected queue / 59 / A 16-bit r/w queue selector / 62 / A 16-bit r/w queue notifier / 65 / An 8-bit device status register. / 68 / An 8-bit r/o interrupt status register. Reading the value will return the 70 * a read-and-acknowledge. / 73 / MSI-X registers: only enabled if MSI-X is enabled. */ [all …]
/linux/drivers/net/ethernet/zte/dinghai/
H A D	dh_queue.h	`1 /* SPDX-License-Identifier: GPL-2.0-only / 3 ZTE DingHai Ethernet driver - PCI capability definitions 4 * Copyright (c) 2022-2026, ZTE Corporation. 28 __le32 device_feature_select; /* read-write / 29 __le32 device_feature; / read-only / 30 __le32 guest_feature_select; / read-write / 31 __le32 guest_feature; / read-write / 32 __le16 msix_config; / read-write / 33 __le16 num_queues; / read-only / 34 __u8 device_status; / read-write */ [all …]`
/linux/drivers/gpib/hp_82341/
H A D	hp_82341.h	`1 /* SPDX-License-Identifier: GPL-2.0 */ 40 XILINX_DATA_REG = 0x2, // before initialization, write only 68 XILINX_READY_BIT = 0x40, // read only 97 SLOT8_BIT = 0x1, // read only 98 ACTIVE_CONTROLLER_BIT = 0x2, // read only 107 MONITOR_INTERRUPT_PENDING_BIT = 0x1, // read only 108 MONITOR_CLEAR_HOLDOFF_BIT = 0x2, // write only 109 MONITOR_PPOLL_BIT = 0x4, // write clear 110 MONITOR_SRQ_BIT = 0x8, // write clear 111 MONITOR_IFC_BIT = 0x10, // write clear [all …]`
/linux/Documentation/ABI/testing/
H A D	sysfs-platform-dfl-fme	1 What: /sys/bus/platform/devices/dfl-fme.0/ports_num 5 Description: Read-only. One DFL FPGA device may have more than 1 9 What: /sys/bus/platform/devices/dfl-fme.0/bitstream_id 13 Description: Read-only. It returns Bitstream (static FPGA region) 17 What: /sys/bus/platform/devices/dfl-fme.0/bitstream_metadata 21 Description: Read-only. It returns Bitstream (static FPGA region) meta 25 What: /sys/bus/platform/devices/dfl-fme.0/cache_size 29 Description: Read-only. It returns cache size of this FPGA device. 31 What: /sys/bus/platform/devices/dfl-fme.0/fabric_version 35 Description: Read-only. It returns fabric version of this FPGA device. [all …]
H A D	configfs-most	`7 Attributes are visible only when configfs is mounted. To mount 9 # mount -t configfs none /sys/kernel/config/ 22 configure the sub-buffer size for this channel 40 for MediaLB communication only) 46 communication only) 58 write '1' to this attribute to trigger the 60 configuration, the creation is post-poned until 64 write '1' to this attribute to destroy an 77 configure the sub-buffer size for this channel 95 for MediaLB communication only) [all …]`
H A D	sysfs-class-firmware	4 Contact: driver-core@lists.linux.dev 5 Description: The data sysfs file is used for firmware-fallback and for 8 image write is complete, echo 0 to the loading sysfs file. This 9 sequence will signal the completion of the firmware write and 10 signal the lower-level driver that the firmware data is 16 Contact: driver-core@lists.linux.dev 17 Description: Write-only. For firmware uploads, write a "1" to this file to 18 request that the transfer of firmware data to the lower-level 20 the update cannot be canceled (e.g. a FLASH write is in 26 Contact: driver-core@lists.linux.dev [all …]
/linux/Documentation/ABI/stable/
H A D	sysfs-bus-nvmem	6 This read/write attribute allows users to set read-write 7 devices as read-only and back to read-write from userspace. 8 This can be used to unlock and relock write-protection of 11 Read returns '0' or '1' for read-write or read-only modes 13 Write parses one of 'YyTt1NnFf0', or [oO][NnFf] for "on" 15 Note: This file is only present if CONFIG_NVMEM_SYSFS 23 This file allows user to read/write the raw NVMEM contents. 24 Permissions for write to this file depends on the nvmem 26 Note: This file is only present if CONFIG_NVMEM_SYSFS 46 This read-only attribute allows user to read the NVMEM [all …]
H A D	sysfs-driver-mlxreg-io	1 What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon/asic_health 6 0 - health failed, 2 - health OK, 3 - ASIC in booting state. 8 The files are read only. 10 What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon/cpld1_version 11 What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon/cpld2_version 18 The files are read only. 20 What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon/fan_dir 25 forward direction - relevant bit is set 0; 26 reversed direction - relevant bit is set 1. 28 The files are read only. [all …]
/linux/fs/nls/
H A D	Kconfig	1 # SPDX-License-Identifier: GPL-2.0-only 23 default "iso8859-1" 31 cp949, cp950, cp1251, cp1255, euc-jp, euc-kr, gb2312, iso8859-1, 32 iso8859-2, iso8859-3, iso8859-4, iso8859-5, iso8859-6, iso8859-7, 33 iso8859-8, iso8859-9, iso8859-13, iso8859-14, iso8859-15, 34 koi8-r, koi8-ru, koi8-u, sjis, tis-620, macroman, utf8. 35 If you specify a wrong value, it will use the built-in NLS; 36 compatible with iso8859-1. 38 If unsure, specify it as "iso8859-1". 45 in so-called DOS codepages. You need to include the appropriate [all …]
/linux/tools/testing/selftests/kvm/x86/
H A D	hyperv_features.c	`1 // SPDX-License-Identifier: GPL-2.0-only 5 * Tests for Hyper-V features enablement 18 * but to activate the feature it is sufficient to set it to a non-zero 27 bool write; member 48 GUEST_ASSERT(msr->idx); in guest_msr() 50 if (msr->writ in guest_msr() [all...]`
/linux/Documentation/filesystems/spufs/
H A D	spufs.rst	1 .. SPDX-License-Identifier: GPL-2.0 10 spufs - the SPU file system 21 message queues. Users that have write permissions on the file system 26 logical SPU. Users can change permissions on those files, but not actu- 43 The files in spufs mostly follow the standard behavior for regular sys- 44 tem calls like read(2) or write(2), but often support only a subset of 50 all files that support the write(2) operation also support writev(2). 52 only the st_mode, st_nlink, st_uid and st_gid fields of struct stat 55 All files support the chmod(2)/fchmod(2) and chown(2)/fchown(2) opera- 68 read(2), pread(2), write(2), pwrite(2), lseek(2) [all …]
/linux/sound/firewire/dice/
H A D	dice-interface.h	1 /* SPDX-License-Identifier: GPL-2.0 / 11 block read transactions with at least quadlet-aligned offset and length. 12 * Writes are not allowed except where noted; quadlet-sized registers must be 13 * written with a quadlet write transaction. 15 * All values are in big endian. The DICE firmware runs on a little-endian CPU 16 * and just byte-swaps _all_ quadlets on the bus, so values without endianness 17 * (e.g. strings) get scrambled and must be byte-swapped again by the driver. 32 * size values are measured in quadlets. Read-only. 50 * Stores the full 64-bit address (node ID and offset in the node's address 60 * A bitmask with asynchronous events; read-only. When any event(s) happen, [all …]
/linux/include/soc/at91/
H A D	at91sam9_ddrsdr.h	1 /* SPDX-License-Identifier: GPL-2.0-or-later / 45 #define AT91_DDRSDRC_DIS_DLL (1 << 9) / Disable DLL [SAM9 Only] / 46 #define AT91_DDRSDRC_OCD (1 << 12) / Off-Chip Driver [SAM9 Only] / 47 #define AT91_DDRSDRC_DQMS (1 << 16) / Mask Data is Shared [SAM9 Only] / 48 …ne AT91_DDRSDRC_ACTBST (1 << 18) / Active Bank X to Burst Stop Read Access Bank Y [SAM9 Only] / 53 #define AT91_DDRSDRC_TWR (0xf << 8) / Write recovery delay / 57 #define AT91_DDRSDRC_TWTR (0x7 << 24) / Internal Write to Read delay / 58 #define AT91_DDRSDRC_RED_WRRD (0x1 << 27) / Reduce Write to Read Delay [SAM9 Only] / 63 #define AT91_DDRSDRC_TXSNR (0xff << 8) / Exit self-refresh to non-read / 64 #define AT91_DDRSDRC_TXSRD (0xff << 16) / Exit self-refresh to read */ [all …]
/linux/tools/perf/pmu-events/arch/x86/jaketown/
H A D	uncore-memory.json	12 … "BriefDescription": "DRAM RD_CAS and WR_CAS Commands.; All DRAM WR_CAS (w/ and w/out auto-pre)", 30 … "BriefDescription": "DRAM RD_CAS and WR_CAS Commands.; All DRAM RD_CAS (w/ and w/out auto-pre)", 57 …"BriefDescription": "DRAM RD_CAS and WR_CAS Commands.; DRAM WR_CAS (w/ and w/out auto-pre) in Read… 66 …tion": "DRAM RD_CAS and WR_CAS Commands.; DRAM WR_CAS (w/ and w/out auto-pre) in Write Major Mode", 79 "PublicDescription": "Uncore Fixed Counter - uclks", 117 …rrors detected and corrected by the iMC on this channel. This counter is only useful with ECC DRA… 126 …ected by a filter) on the given channel. Major modea are channel-wide, and not a per-rank (or di… 136 …ected by a filter) on the given channel. Major modea are channel-wide, and not a per-rank (or di… 146 …ected by a filter) on the given channel. Major modea are channel-wide, and not a per-rank (or di… 151 "BriefDescription": "Cycles in a Major Mode; Write Major Mode", [all …]
/linux/Documentation/devicetree/bindings/memory-controllers/
H A D	ti-aemif.txt	4 provide a glue-less interface to a variety of asynchronous memory devices like 11 Davinci DM646x - http://www.ti.com/lit/ug/sprueq7c/sprueq7c.pdf 12 OMAP-L138 (DA850) - http://www.ti.com/lit/ug/spruh77a/spruh77a.pdf 13 Kestone - http://www.ti.com/lit/ug/sprugz3a/sprugz3a.pdf 17 - compatible: "ti,davinci-aemif" 18 "ti,keystone-aemif" 19 "ti,da850-aemif" 21 - reg: contains offset/length value for AEMIF control registers 24 - #address-cells: Must be 2. The partition number has to be encoded in the 25 first address cell and it may accept values 0..N-1 [all …]
/linux/include/linux/mfd/
H A D	janz.h	`1 /* SPDX-License-Identifier: GPL-2.0-or-later / 22 Write access: interrupt disable 29 * Write access: interrupt enable 34 /* write-only / 38 / write-only / 42 / read-write access to serial EEPROM / 46 / write-only access to EEPROM chip select */`
/linux/drivers/net/ethernet/ti/
H A D	davinci_cpdma.h	`1 /* SPDX-License-Identifier: GPL-2.0 / 102 CPDMA_TX_RLIM, / read-write / 103 CPDMA_CMD_IDLE, / write-only / 104 CPDMA_COPY_ERROR_FRAMES, / read-write / 105 CPDMA_RX_OFF_LEN_UPDATE, / read-write / 106 CPDMA_RX_OWNERSHIP_FLIP, / read-write / 107 CPDMA_TX_PRIO_FIXED, / read-write / 108 CPDMA_STAT_IDLE, / read-only / 109 CPDMA_STAT_TX_ERR_CHAN, / read-only / 110 CPDMA_STAT_TX_ERR_CODE, / read-only */ [all …]`
/linux/tools/perf/pmu-events/arch/arm64/arm/neoverse-n1/
H A D	l1d_cache.json	4 …oad or store operations that missed in the level 1 data cache. This event only counts one event pe… 8 …write access and read access. Each access to a cache line is counted including the multiple access… 12 …write-backs of dirty data from the L1 data cache to the L2 cache. This occurs when either a dirty … 16 …. Atomic load operations that resolve in the CPUs caches counts as both a write access and read ac… 20 …uction. Near atomic operations that resolve in the CPUs caches count as a write access and read ac… 24 …re the memory read operation misses in the level 1 data cache. This event only counts one event pe… 28 …xecuted store instructions where the memory write operation misses in the level 1 data cache. This… 44 …"PublicDescription": "Counts write-backs from the level 1 data cache that are a result of a cohere… 48 …n the level 1 data cache caused by:\n\n- Cache Maintenance Operations (CMO) that operate by a virt…
/linux/tools/perf/pmu-events/arch/arm64/arm/neoverse-v1/
H A D	l1d_cache.json	4 …oad or store operations that missed in the level 1 data cache. This event only counts one event pe… 8 …write access and read access. Each access to a cache line is counted including the multiple access… 12 …write-backs of dirty data from the L1 data cache to the L2 cache. This occurs when either a dirty … 20 …. Atomic load operations that resolve in the CPUs caches counts as both a write access and read ac… 24 …uction. Near atomic operations that resolve in the CPUs caches count as a write access and read ac… 28 …re the memory read operation misses in the level 1 data cache. This event only counts one event pe… 32 …xecuted store instructions where the memory write operation misses in the level 1 data cache. This… 48 …"PublicDescription": "Counts write-backs from the level 1 data cache that are a result of a cohere… 52 …n the level 1 data cache caused by:\n\n- Cache Maintenance Operations (CMO) that operate by a virt…
/linux/tools/perf/pmu-events/arch/x86/snowridgex/
H A D	uncore-memory.json	8 …"PublicDescription": "Counts the total number of DRAM Read CAS commands, w/ and w/o auto-pre, issu… 14 "BriefDescription": "write requests to memory controller. Derived from unc_m_cas_count.wr", 19 …"PublicDescription": "Counts the total number of DRAM Write CAS commands issued, w/ and w/o auto-p… 61 …"PublicDescription": "Counts the total number of DRAM Read CAS commands, w/ and w/o auto-pre, issu… 66 "BriefDescription": "DRAM RD_CAS and WR_CAS Commands. : DRAM RD_CAS commands w/auto-pre", 72 …-pre : DRAM RD_CAS and WR_CAS Commands : Counts the total number or DRAM Read CAS commands issued … 110 "BriefDescription": "All DRAM write CAS commands issued", 115 …"PublicDescription": "Counts the total number of DRAM Write CAS commands issued, w/ and w/o auto-p… 120 "BriefDescription": "DRAM RD_CAS and WR_CAS Commands. : DRAM WR_CAS commands w/o auto-pre", 126 …"PublicDescription": "DRAM RD_CAS and WR_CAS Commands. : DRAM WR_CAS commands w/o auto-pre : DRAM … [all …]
/linux/drivers/tty/serial/
H A D	sunzilog.h	`1 /* SPDX-License-Identifier: GPL-2.0 / 24 #define BPS_TO_BRG(bps, freq) ((((freq) + (bps)) / (2 (bps))) - 2) 30 /* Write Register 0 / 61 / Write Register 1 / 68 #define RxINT_FCERR 0x8 / Rx Int on First Character Only or Error / 70 #define INT_ERR_Rx 0x18 / Int on error only / 77 / Write Register #2 (Interrupt Vector) / 79 / Write Register 3 / 93 / Write Register 4 / 114 / Write Register 5 */ [all …]`
/linux/tools/perf/pmu-events/arch/arm64/arm/cortex-a55/
H A D	cache.json	105 …ion. If so, only hardware prefetches should be counted, regardless of whether they allocate. If ei… 108 …ion. If so, only hardware prefetches should be counted, regardless of whether they allocate. If ei… 111 …-core L2 cache: This event does not count. +//0 If the core is configured without a per-core L2 ca… 114 …-core L2 cache: This event does not count. +//0 If the core is configured without a per-core L2 ca… 117 …This event counts any linefills from the prefetcher which cause an allocation into the L1 D-cache", 120 … This event counts any linefills from the prefetcher which cause an allocation into the L1 D-cache" 123 …PublicDescription": "Level 2 cache write streaming mode. This event counts for each cycle where th… 126 …"BriefDescription": "Level 2 cache write streaming mode. This event counts for each cycle where th… 129 …cDescription": "Level 1 data cache entering write streaming mode.This event counts for each entry … 132 …fDescription": "Level 1 data cache entering write streaming mode.This event counts for each entry … [all …]
/linux/Documentation/bpf/
H A D	prog_cgroup_sysctl.rst	1 .. SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) 8 provides cgroup-bpf hook for sysctl. 11 process inside that cgroup tries to read from or write to sysctl knob in proc. 26 __u32 write; 30 * ``write`` indicates whether sysctl value is being read (``0``) or written 31 (``1``). This field is read-only. 34 or written. This field is read-write. Writing to the field sets the starting 35 position in sysctl proc file ``read(2)`` will be reading from or ``write(2)`` 37 whole sysctl value by ``bpf_sysctl_set_new_value()`` on ``write(2)`` even 38 when it's called by user space on ``file_pos > 0``. Writing non-zero [all …]

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