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With ZONE_DEVICE now available for s390, struct pages can be allocated for proper DAX support in dcssblk driver via devm_memremap_pages(). Adding struct pages for a range requires that the range is aligned to SUBSECTION_SIZE, which is defined as 2 MB in common code. Therefore, only enable DAX support and allocate struct pages for DCSS ranges that are aligned to 2 MB. Signed-off-by: Gerald Schaefer <gerald.schaefer@linux.ibm.com> Acked-by: Heiko Carstens <hca@linux.ibm.com> Reviewed-by: Alexander Gordeev <agordeev@linux.ibm.com> Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
74 lines
2.0 KiB
Plaintext
74 lines
2.0 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0
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comment "S/390 block device drivers"
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depends on S390 && BLOCK
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config DCSSBLK
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def_tristate m
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prompt "DCSSBLK support"
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depends on S390 && BLOCK && ZONE_DEVICE
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select FS_DAX
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help
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Support for dcss block device
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config DASD
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def_tristate y
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prompt "Support for DASD devices"
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depends on CCW && BLOCK
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help
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Enable this option if you want to access DASDs directly utilizing
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S/390s channel subsystem commands. This is necessary for running
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natively on a single image or an LPAR.
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config DASD_PROFILE
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def_bool y
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prompt "Profiling support for dasd devices"
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depends on DASD
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help
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Enable this option if you want to see profiling information
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in /proc/dasd/statistics.
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config DASD_ECKD
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def_tristate y
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prompt "Support for ECKD Disks"
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depends on DASD
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help
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ECKD devices are the most commonly used devices. You should enable
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this option unless you are very sure to have no ECKD device.
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config DASD_FBA
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def_tristate y
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prompt "Support for FBA Disks"
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depends on DASD
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help
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Select this option to be able to access FBA devices. It is safe to
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say "Y".
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config DASD_DIAG
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def_tristate y
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prompt "Support for DIAG access to Disks"
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depends on DASD
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help
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Select this option if you want to use Diagnose250 command to access
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Disks under VM. If you are not running under VM or unsure what it is,
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say "N".
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config DASD_EER
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def_bool y
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prompt "Extended error reporting (EER)"
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depends on DASD
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help
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This driver provides a character device interface to the
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DASD extended error reporting. This is only needed if you want to
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use applications written for the EER facility.
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config SCM_BLOCK
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def_tristate m
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prompt "Support for Storage Class Memory"
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depends on S390 && BLOCK && EADM_SCH && SCM_BUS
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help
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Block device driver for Storage Class Memory (SCM). This driver
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provides a block device interface for each available SCM increment.
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To compile this driver as a module, choose M here: the
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module will be called scm_block.
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