forked from Minki/linux
3f4298427a
If memory is fragmented it is unlikely that large order memory allocations succeed. This has been an issue with the vmcp device driver since a long time, since it requires large physical contiguous memory ares for large responses. To hopefully resolve this issue make use of the contiguous memory allocator (cma). This patch adds a vmcp specific vmcp cma area with a default size of 4MB. The size can be changed either via the VMCP_CMA_SIZE config option at compile time or with the "vmcp_cma" kernel parameter (e.g. "vmcp_cma=16m"). For any vmcp response buffers larger than 16k memory from the cma area will be allocated. If such an allocation fails, there is a fallback to the buddy allocator. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
208 lines
5.9 KiB
Plaintext
208 lines
5.9 KiB
Plaintext
comment "S/390 character device drivers"
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depends on S390
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config TN3270
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def_tristate y
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prompt "Support for locally attached 3270 terminals"
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depends on CCW
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help
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Include support for IBM 3270 terminals.
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config TN3270_TTY
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def_tristate y
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prompt "Support for tty input/output on 3270 terminals"
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depends on TN3270 && TTY
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help
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Include support for using an IBM 3270 terminal as a Linux tty.
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config TN3270_FS
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def_tristate m
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prompt "Support for fullscreen applications on 3270 terminals"
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depends on TN3270
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help
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Include support for fullscreen applications on an IBM 3270 terminal.
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config TN3270_CONSOLE
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def_bool y
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prompt "Support for console on 3270 terminal"
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depends on TN3270=y && TN3270_TTY=y
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help
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Include support for using an IBM 3270 terminal as a Linux system
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console. Available only if 3270 support is compiled in statically.
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config TN3215
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def_bool y
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prompt "Support for 3215 line mode terminal"
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depends on CCW && TTY
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help
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Include support for IBM 3215 line-mode terminals.
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config TN3215_CONSOLE
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def_bool y
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prompt "Support for console on 3215 line mode terminal"
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depends on TN3215
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help
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Include support for using an IBM 3215 line-mode terminal as a
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Linux system console.
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config CCW_CONSOLE
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def_bool y if TN3215_CONSOLE || TN3270_CONSOLE
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config SCLP_TTY
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def_bool y
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prompt "Support for SCLP line mode terminal"
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depends on S390 && TTY
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help
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Include support for IBM SCLP line-mode terminals.
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config SCLP_CONSOLE
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def_bool y
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prompt "Support for console on SCLP line mode terminal"
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depends on SCLP_TTY
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help
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Include support for using an IBM HWC line-mode terminal as the Linux
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system console.
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config SCLP_VT220_TTY
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def_bool y
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prompt "Support for SCLP VT220-compatible terminal"
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depends on S390 && TTY
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help
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Include support for an IBM SCLP VT220-compatible terminal.
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config SCLP_VT220_CONSOLE
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def_bool y
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prompt "Support for console on SCLP VT220-compatible terminal"
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depends on SCLP_VT220_TTY
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help
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Include support for using an IBM SCLP VT220-compatible terminal as a
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Linux system console.
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config SCLP_ASYNC
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def_tristate m
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prompt "Support for Call Home via Asynchronous SCLP Records"
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depends on S390
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help
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This option enables the call home function, which is able to inform
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the service element and connected organisations about a kernel panic.
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You should only select this option if you know what you are doing,
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want for inform other people about your kernel panics,
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need this feature and intend to run your kernel in LPAR.
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config SCLP_ASYNC_ID
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string "Component ID for Call Home"
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depends on SCLP_ASYNC
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default "000000000"
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help
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The Component ID for Call Home is used to identify the correct
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problem reporting queue the call home records should be sent to.
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If your are unsure, please use the default value "000000000".
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config HMC_DRV
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def_tristate m
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prompt "Support for file transfers from HMC drive CD/DVD-ROM"
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depends on S390
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select CRC16
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help
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This option enables support for file transfers from a Hardware
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Management Console (HMC) drive CD/DVD-ROM. It is available as a
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module, called 'hmcdrv', and also as kernel built-in. There is one
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optional parameter for this module: cachesize=N, which modifies the
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transfer cache size from it's default value 0.5MB to N bytes. If N
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is zero, then no caching is performed.
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config SCLP_OFB
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def_bool n
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prompt "Support for Open-for-Business SCLP Event"
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depends on S390
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help
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This option enables the Open-for-Business interface to the s390
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Service Element.
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config S390_TAPE
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def_tristate m
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prompt "S/390 tape device support"
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depends on CCW
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help
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Select this option if you want to access channel-attached tape
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devices on IBM S/390 or zSeries.
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If you select this option you will also want to select at
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least one of the tape interface options and one of the tape
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hardware options in order to access a tape device.
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This option is also available as a module. The module will be
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called tape390 and include all selected interfaces and
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hardware drivers.
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comment "S/390 tape hardware support"
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depends on S390_TAPE
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config S390_TAPE_34XX
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def_tristate m
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prompt "Support for 3480/3490 tape hardware"
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depends on S390_TAPE
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help
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Select this option if you want to access IBM 3480/3490 magnetic
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tape subsystems and 100% compatibles.
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It is safe to say "Y" here.
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config S390_TAPE_3590
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def_tristate m
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prompt "Support for 3590 tape hardware"
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depends on S390_TAPE
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help
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Select this option if you want to access IBM 3590 magnetic
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tape subsystems and 100% compatibles.
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It is safe to say "Y" here.
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config VMLOGRDR
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def_tristate m
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prompt "Support for the z/VM recording system services (VM only)"
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depends on IUCV
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help
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Select this option if you want to be able to receive records collected
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by the z/VM recording system services, eg. from *LOGREC, *ACCOUNT or
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*SYMPTOM.
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This driver depends on the IUCV support driver.
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config VMCP
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def_bool y
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prompt "Support for the z/VM CP interface"
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depends on S390
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select CMA
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help
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Select this option if you want to be able to interact with the control
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program on z/VM
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config VMCP_CMA_SIZE
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int "Memory in MiB reserved for z/VM CP interface"
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default "4"
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depends on VMCP
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help
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Specify the default amount of memory in MiB reserved for the z/VM CP
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interface. If needed this memory is used for large contiguous memory
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allocations. The default can be changed with the kernel command line
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parameter "vmcp_cma".
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config MONREADER
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def_tristate m
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prompt "API for reading z/VM monitor service records"
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depends on IUCV
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help
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Character device driver for reading z/VM monitor service records
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config MONWRITER
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def_tristate m
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prompt "API for writing z/VM monitor service records"
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depends on S390
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help
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Character device driver for writing z/VM monitor service records
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config S390_VMUR
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def_tristate m
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prompt "z/VM unit record device driver"
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depends on S390
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help
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Character device driver for z/VM reader, puncher and printer.
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