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    Subject[patch 59/60] provide documentation for hvc_iucv printk & kernel parameter.
    From: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>

    Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
    Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
    ---

    Documentation/kernel-parameters.txt | 3 ++
    Documentation/kmsg/s390/hvc_iucv | 50 ++++++++++++++++++++++++++++++++++++
    2 files changed, 53 insertions(+)

    Index: quilt-2.6/Documentation/kernel-parameters.txt
    ===================================================================
    --- quilt-2.6.orig/Documentation/kernel-parameters.txt
    +++ quilt-2.6/Documentation/kernel-parameters.txt
    @@ -811,6 +811,9 @@ and is between 256 and 4096 characters.

    hlt [BUGS=ARM,SH]

    + hvc_iucv= [S390] Number of z/VM IUCV Hypervisor console (HVC)
    + back-ends. Valid parameters: 0..8
    +
    i8042.debug [HW] Toggle i8042 debug mode
    i8042.direct [HW] Put keyboard port into non-translated mode
    i8042.dumbkbd [HW] Pretend that controller can only read data from
    Index: quilt-2.6/Documentation/kmsg/s390/hvc_iucv
    ===================================================================
    --- /dev/null
    +++ quilt-2.6/Documentation/kmsg/s390/hvc_iucv
    @@ -0,0 +1,50 @@
    +/*?
    + * Text: "The z/VM IUCV Hypervisor console cannot be used without z/VM.\n"
    + * Severity: Warning
    + * Description:
    + * On Linux instances that run in environments other than the z/VM hypervisor,
    + * z/VM IUCV is not available and the z/VM IUCV Hypervisor console cannot be
    + * used.
    + * User action:
    + * If the system does not run on a z/VM guest virtual machine,
    + * ignore this message.
    + */
    +
    +/*?
    + * Text: "Could not create new z/VM IUCV HVC backend rc=%d.\n"
    + * Severity: Error
    + * Parameter:
    + * @1: Return code of the operation that has failed.
    + * Description:
    + * The driver initialization has failed to allocate a new z/VM IUCV HVC
    + * back-end. A common cause might be that there are not sufficient memory
    + * available.
    + * User action:
    + * Enure that the z/VM guest virtual machine has sufficient memory.
    + */
    +
    +/*?
    + * Text: "Could not register iucv handler (rc=%d).\n"
    + * Severity: Error
    + * Parameter:
    + * @1: Return code from the IUCV registration.
    + * Description:
    + * The driver initialization has failed to register its z/VM IUCV callbacks to
    + * handle z/VM IUCV connections, and sending/receiving of IUCV messages.
    + * User action:
    + * Typically there might be additional IUCV error messages at the Linux kernel
    + * startup. Check the system log files.
    + */
    +
    +/*?
    + * Text: "Not enough memory for driver initialization (rs=%d).\n"
    + * Severity: Error
    + * Parameter:
    + * @1: Memory allocation has failed: 1 = kmem_cache; and 2 = mempool.
    + * Description:
    + * The z/VM IUCV Hypervisor console back-end initialization has faild, because
    + * of a general memory allocation failure.
    + * User action:
    + * Ensure that the z/VM guest virtual machine has sufficient memory.
    + * See the your Linux distributor manuals for minimum system requirements.
    + */
    --
    blue skies,
    Martin.

    "Reality continues to ruin my life." - Calvin.



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