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b2441318 | 1 | # SPDX-License-Identifier: GPL-2.0 |
3a65dfe8 JA |
2 | # |
3 | # Block layer core configuration | |
4 | # | |
16ed002f | 5 | menuconfig BLOCK |
6a108a14 | 6 | bool "Enable the block layer" if EXPERT |
9361401e | 7 | default y |
88459642 | 8 | select SBITMAP |
6a83e74d | 9 | select SRCU |
9361401e | 10 | help |
ee86418d | 11 | Provide block layer support for the kernel. |
9361401e | 12 | |
ee86418d NA |
13 | Disable this option to remove the block layer support from the |
14 | kernel. This may be useful for embedded devices. | |
15 | ||
16 | If this option is disabled: | |
17 | ||
18 | - block device files will become unusable | |
19 | - some filesystems (such as ext3) will become unavailable. | |
20 | ||
21 | Also, SCSI character devices and USB storage will be disabled since | |
22 | they make use of various block layer definitions and facilities. | |
9361401e DH |
23 | |
24 | Say Y here unless you know you really don't want to mount disks and | |
25 | suchlike. | |
26 | ||
27 | if BLOCK | |
3a65dfe8 | 28 | |
6f816b4b TH |
29 | config BLK_RQ_ALLOC_TIME |
30 | bool | |
31 | ||
72148aec CH |
32 | config BLK_SCSI_REQUEST |
33 | bool | |
34 | ||
1d156646 TH |
35 | config BLK_CGROUP_RWSTAT |
36 | bool | |
37 | ||
3d6392cf | 38 | config BLK_DEV_BSG |
14d9fa35 JS |
39 | bool "Block layer SG support v4" |
40 | default y | |
72148aec | 41 | select BLK_SCSI_REQUEST |
14d9fa35 | 42 | help |
ee86418d NA |
43 | Saying Y here will enable generic SG (SCSI generic) v4 support |
44 | for any block device. | |
45 | ||
46 | Unlike SG v3 (aka block/scsi_ioctl.c drivers/scsi/sg.c), SG v4 | |
47 | can handle complicated SCSI commands: tagged variable length cdbs | |
48 | with bidirectional data transfers and generic request/response | |
49 | protocols (e.g. Task Management Functions and SMP in Serial | |
50 | Attached SCSI). | |
51 | ||
14d9fa35 JS |
52 | This option is required by recent UDEV versions to properly |
53 | access device serial numbers, etc. | |
54 | ||
55 | If unsure, say Y. | |
3d6392cf | 56 | |
aa387cc8 MC |
57 | config BLK_DEV_BSGLIB |
58 | bool "Block layer SG support v4 helper lib" | |
aa387cc8 | 59 | select BLK_DEV_BSG |
72148aec | 60 | select BLK_SCSI_REQUEST |
aa387cc8 MC |
61 | help |
62 | Subsystems will normally enable this if needed. Users will not | |
63 | normally need to manually enable this. | |
64 | ||
65 | If unsure, say N. | |
66 | ||
7ba1ba12 MP |
67 | config BLK_DEV_INTEGRITY |
68 | bool "Block layer data integrity support" | |
2341c2f8 | 69 | select CRC_T10DIF if BLK_DEV_INTEGRITY |
7ba1ba12 MP |
70 | ---help--- |
71 | Some storage devices allow extra information to be | |
72 | stored/retrieved to help protect the data. The block layer | |
73 | data integrity option provides hooks which can be used by | |
74 | filesystems to ensure better data integrity. | |
75 | ||
76 | Say yes here if you have a storage device that provides the | |
77 | T10/SCSI Data Integrity Field or the T13/ATA External Path | |
78 | Protection. If in doubt, say N. | |
79 | ||
6a0cb1bc HR |
80 | config BLK_DEV_ZONED |
81 | bool "Zoned block device support" | |
b9aef63a | 82 | select MQ_IOSCHED_DEADLINE |
6a0cb1bc HR |
83 | ---help--- |
84 | Block layer zoned block device support. This option enables | |
85 | support for ZAC/ZBC host-managed and host-aware zoned block devices. | |
86 | ||
87 | Say yes here if you have a ZAC or ZBC storage device. | |
88 | ||
e43473b7 VG |
89 | config BLK_DEV_THROTTLING |
90 | bool "Block layer bio throttling support" | |
8e42e0a2 | 91 | depends on BLK_CGROUP=y |
1d156646 | 92 | select BLK_CGROUP_RWSTAT |
e43473b7 VG |
93 | ---help--- |
94 | Block layer bio throttling support. It can be used to limit | |
95 | the IO rate to a device. IO rate policies are per cgroup and | |
96 | one needs to mount and use blkio cgroup controller for creating | |
97 | cgroups and specifying per device IO rate policies. | |
98 | ||
da82c92f | 99 | See Documentation/admin-guide/cgroup-v1/blkio-controller.rst for more information. |
e43473b7 | 100 | |
327ffb9b SL |
101 | config BLK_DEV_THROTTLING_LOW |
102 | bool "Block throttling .low limit interface support (EXPERIMENTAL)" | |
103 | depends on BLK_DEV_THROTTLING | |
327ffb9b SL |
104 | ---help--- |
105 | Add .low limit interface for block throttling. The low limit is a best | |
106 | effort limit to prioritize cgroups. Depending on the setting, the limit | |
107 | can be used to protect cgroups in terms of bandwidth/iops and better | |
108 | utilize disk resource. | |
109 | ||
110 | Note, this is an experimental interface and could be changed someday. | |
111 | ||
080506ad | 112 | config BLK_CMDLINE_PARSER |
bab55417 | 113 | bool "Block device command line partition parser" |
bab55417 | 114 | ---help--- |
080506ad PG |
115 | Enabling this option allows you to specify the partition layout from |
116 | the kernel boot args. This is typically of use for embedded devices | |
117 | which don't otherwise have any standardized method for listing the | |
118 | partitions on a block device. | |
119 | ||
898bd37a | 120 | See Documentation/block/cmdline-partition.rst for more information. |
bab55417 | 121 | |
87760e5e JA |
122 | config BLK_WBT |
123 | bool "Enable support for block device writeback throttling" | |
87760e5e JA |
124 | ---help--- |
125 | Enabling this option enables the block layer to throttle buffered | |
126 | background writeback from the VM, making it more smooth and having | |
127 | less impact on foreground operations. The throttling is done | |
128 | dynamically on an algorithm loosely based on CoDel, factoring in | |
129 | the realtime performance of the disk. | |
130 | ||
d7067512 JB |
131 | config BLK_CGROUP_IOLATENCY |
132 | bool "Enable support for latency based cgroup IO protection" | |
133 | depends on BLK_CGROUP=y | |
d7067512 JB |
134 | ---help--- |
135 | Enabling this option enables the .latency interface for IO throttling. | |
136 | The IO controller will attempt to maintain average IO latencies below | |
137 | the configured latency target, throttling anybody with a higher latency | |
138 | target than the victimized group. | |
139 | ||
140 | Note, this is an experimental interface and could be changed someday. | |
141 | ||
7caa4715 TH |
142 | config BLK_CGROUP_IOCOST |
143 | bool "Enable support for cost model based cgroup IO controller" | |
144 | depends on BLK_CGROUP=y | |
145 | select BLK_RQ_ALLOC_TIME | |
146 | ---help--- | |
147 | Enabling this option enables the .weight interface for cost | |
148 | model based proportional IO control. The IO controller | |
149 | distributes IO capacity between different groups based on | |
150 | their share of the overall weight distribution. | |
151 | ||
87760e5e JA |
152 | config BLK_WBT_MQ |
153 | bool "Multiqueue writeback throttling" | |
154 | default y | |
155 | depends on BLK_WBT | |
156 | ---help--- | |
157 | Enable writeback throttling by default on multiqueue devices. | |
158 | Multiqueue currently doesn't have support for IO scheduling, | |
159 | enabling this option is recommended. | |
160 | ||
400f73b2 OS |
161 | config BLK_DEBUG_FS |
162 | bool "Block layer debugging information in debugfs" | |
163 | default y | |
164 | depends on DEBUG_FS | |
165 | ---help--- | |
166 | Include block layer debugging information in debugfs. This information | |
167 | is mostly useful for kernel developers, but it doesn't incur any cost | |
168 | at runtime. | |
169 | ||
170 | Unless you are building a kernel for a tiny system, you should | |
171 | say Y here. | |
172 | ||
6a5ac984 BVA |
173 | config BLK_DEBUG_FS_ZONED |
174 | bool | |
175 | default BLK_DEBUG_FS && BLK_DEV_ZONED | |
176 | ||
455a7b23 SB |
177 | config BLK_SED_OPAL |
178 | bool "Logic for interfacing with Opal enabled SEDs" | |
179 | ---help--- | |
180 | Builds Logic for interfacing with Opal enabled controllers. | |
181 | Enabling this option enables users to setup/unlock/lock | |
182 | Locking ranges for SED devices using the Opal protocol. | |
183 | ||
9be96f3f AV |
184 | menu "Partition Types" |
185 | ||
186 | source "block/partitions/Kconfig" | |
187 | ||
188 | endmenu | |
189 | ||
2b9e0aae LT |
190 | endif # BLOCK |
191 | ||
99874d50 JA |
192 | config BLOCK_COMPAT |
193 | bool | |
2b9e0aae | 194 | depends on BLOCK && COMPAT |
99874d50 JA |
195 | default y |
196 | ||
8ec2ef2b SR |
197 | config BLK_MQ_PCI |
198 | bool | |
199 | depends on BLOCK && PCI | |
200 | default y | |
201 | ||
73473427 CH |
202 | config BLK_MQ_VIRTIO |
203 | bool | |
204 | depends on BLOCK && VIRTIO | |
205 | default y | |
206 | ||
24c5dc66 SG |
207 | config BLK_MQ_RDMA |
208 | bool | |
209 | depends on BLOCK && INFINIBAND | |
210 | default y | |
211 | ||
bca6b067 BVA |
212 | config BLK_PM |
213 | def_bool BLOCK && PM | |
214 | ||
8636a1f9 | 215 | source "block/Kconfig.iosched" |