diff options
Diffstat (limited to 'Documentation/s390')
| -rw-r--r-- | Documentation/s390/00-INDEX | 8 | ||||
| -rw-r--r-- | Documentation/s390/CommonIO | 12 | ||||
| -rw-r--r-- | Documentation/s390/monreader.txt | 2 | ||||
| -rw-r--r-- | Documentation/s390/qeth.txt | 50 | ||||
| -rw-r--r-- | Documentation/s390/s390dbf.txt | 13 | ||||
| -rw-r--r-- | Documentation/s390/zfcpdump.txt | 73 |
6 files changed, 94 insertions, 64 deletions
diff --git a/Documentation/s390/00-INDEX b/Documentation/s390/00-INDEX index 3a2b96302ec..10c874ebdfe 100644 --- a/Documentation/s390/00-INDEX +++ b/Documentation/s390/00-INDEX @@ -16,11 +16,13 @@ Debugging390.txt - hints for debugging on s390 systems. driver-model.txt - information on s390 devices and the driver model. +kvm.txt + - ioctl calls to /dev/kvm on s390. monreader.txt - information on accessing the z/VM monitor stream from Linux. +qeth.txt + - HiperSockets Bridge Port Support. s390dbf.txt - information on using the s390 debug feature. -TAPE - - information on the driver for channel-attached tapes. -zfcpdump +zfcpdump.txt - information on the s390 SCSI dump tool. diff --git a/Documentation/s390/CommonIO b/Documentation/s390/CommonIO index d378cba6645..6e0f63f343b 100644 --- a/Documentation/s390/CommonIO +++ b/Documentation/s390/CommonIO @@ -8,9 +8,9 @@ Command line parameters Enable logging of debug information in case of ccw device timeouts. -* cio_ignore = {all} | - {<device> | <range of devices>} | - {!<device> | !<range of devices>} +* cio_ignore = device[,device[,..]] + + device := {all | [!]ipldev | [!]condev | [!]<devno> | [!]<devno>-<devno>} The given devices will be ignored by the common I/O-layer; no detection and device sensing will be done on any of those devices. The subchannel to @@ -24,8 +24,10 @@ Command line parameters device numbers (0xabcd or abcd, for 2.4 backward compatibility). If you give a device number 0xabcd, it will be interpreted as 0.0.abcd. - You can use the 'all' keyword to ignore all devices. - The '!' operator will cause the I/O-layer to _not_ ignore a device. + You can use the 'all' keyword to ignore all devices. The 'ipldev' and 'condev' + keywords can be used to refer to the CCW based boot device and CCW console + device respectively (these are probably useful only when combined with the '!' + operator). The '!' operator will cause the I/O-layer to _not_ ignore a device. The command line is parsed from left to right. For example, diff --git a/Documentation/s390/monreader.txt b/Documentation/s390/monreader.txt index beeaa4b2442..d3729585fdb 100644 --- a/Documentation/s390/monreader.txt +++ b/Documentation/s390/monreader.txt @@ -10,7 +10,7 @@ Author: Gerald Schaefer (geraldsc@de.ibm.com) Description =========== This item delivers a new Linux API in the form of a misc char device that is -useable from user space and allows read access to the z/VM Monitor Records +usable from user space and allows read access to the z/VM Monitor Records collected by the *MONITOR System Service of z/VM. diff --git a/Documentation/s390/qeth.txt b/Documentation/s390/qeth.txt new file mode 100644 index 00000000000..74122ada994 --- /dev/null +++ b/Documentation/s390/qeth.txt @@ -0,0 +1,50 @@ +IBM s390 QDIO Ethernet Driver + +HiperSockets Bridge Port Support + +Uevents + +To generate the events the device must be assigned a role of either +a primary or a secondary Bridge Port. For more information, see +"z/VM Connectivity, SC24-6174". + +When run on HiperSockets Bridge Capable Port hardware, and the state +of some configured Bridge Port device on the channel changes, a udev +event with ACTION=CHANGE is emitted on behalf of the corresponding +ccwgroup device. The event has the following attributes: + +BRIDGEPORT=statechange - indicates that the Bridge Port device changed + its state. + +ROLE={primary|secondary|none} - the role assigned to the port. + +STATE={active|standby|inactive} - the newly assumed state of the port. + +When run on HiperSockets Bridge Capable Port hardware with host address +notifications enabled, a udev event with ACTION=CHANGE is emitted. +It is emitted on behalf of the corresponding ccwgroup device when a host +or a VLAN is registered or unregistered on the network served by the device. +The event has the following attributes: + +BRIDGEDHOST={reset|register|deregister|abort} - host address + notifications are started afresh, a new host or VLAN is registered or + deregistered on the Bridge Port HiperSockets channel, or address + notifications are aborted. + +VLAN=numeric-vlan-id - VLAN ID on which the event occurred. Not included + if no VLAN is involved in the event. + +MAC=xx:xx:xx:xx:xx:xx - MAC address of the host that is being registered + or deregistered from the HiperSockets channel. Not reported if the + event reports the creation or destruction of a VLAN. + +NTOK_BUSID=x.y.zzzz - device bus ID (CSSID, SSID and device number). + +NTOK_IID=xx - device IID. + +NTOK_CHPID=xx - device CHPID. + +NTOK_CHID=xxxx - device channel ID. + +Note that the NTOK_* attributes refer to devices other than the one +connected to the system on which the OS is running. diff --git a/Documentation/s390/s390dbf.txt b/Documentation/s390/s390dbf.txt index ae66f9b90a2..3da163383c9 100644 --- a/Documentation/s390/s390dbf.txt +++ b/Documentation/s390/s390dbf.txt @@ -143,7 +143,8 @@ Parameter: id: handle for debug log Return Value: none -Description: frees memory for a debug log +Description: frees memory for a debug log and removes all registered debug + views. Must not be called within an interrupt handler --------------------------------------------------------------------------- @@ -157,6 +158,16 @@ Return Value: none Description: Sets new actual debug level if new_level is valid. --------------------------------------------------------------------------- +bool debug_level_enabled (debug_info_t * id, int level); + +Parameter: id: handle for debug log + level: debug level + +Return Value: True if level is less or equal to the current debug level. + +Description: Returns true if debug events for the specified level would be + logged. Otherwise returns false. +--------------------------------------------------------------------------- void debug_stop_all(void); Parameter: none diff --git a/Documentation/s390/zfcpdump.txt b/Documentation/s390/zfcpdump.txt index cf45d27c460..dc929be9601 100644 --- a/Documentation/s390/zfcpdump.txt +++ b/Documentation/s390/zfcpdump.txt @@ -1,15 +1,15 @@ -s390 SCSI dump tool (zfcpdump) +The s390 SCSI dump tool (zfcpdump) System z machines (z900 or higher) provide hardware support for creating system dumps on SCSI disks. The dump process is initiated by booting a dump tool, which has to create a dump of the current (probably crashed) Linux image. In order to not overwrite memory of the crashed Linux with data of the dump tool, the -hardware saves some memory plus the register sets of the boot cpu before the +hardware saves some memory plus the register sets of the boot CPU before the dump tool is loaded. There exists an SCLP hardware interface to obtain the saved memory afterwards. Currently 32 MB are saved. This zfcpdump implementation consists of a Linux dump kernel together with -a userspace dump tool, which are loaded together into the saved memory region +a user space dump tool, which are loaded together into the saved memory region below 32 MB. zfcpdump is installed on a SCSI disk using zipl (as contained in the s390-tools package) to make the device bootable. The operator of a Linux system can then trigger a SCSI dump by booting the SCSI disk, where zfcpdump @@ -19,68 +19,33 @@ The kernel part of zfcpdump is implemented as a debugfs file under "zcore/mem", which exports memory and registers of the crashed Linux in an s390 standalone dump format. It can be used in the same way as e.g. /dev/mem. The dump format defines a 4K header followed by plain uncompressed memory. The -register sets are stored in the prefix pages of the respective cpus. To build a +register sets are stored in the prefix pages of the respective CPUs. To build a dump enabled kernel with the zcore driver, the kernel config option -CONFIG_ZFCPDUMP has to be set. When reading from "zcore/mem", the part of +CONFIG_CRASH_DUMP has to be set. When reading from "zcore/mem", the part of memory, which has been saved by hardware is read by the driver via the SCLP hardware interface. The second part is just copied from the non overwritten real memory. -The userspace application of zfcpdump can reside e.g. in an intitramfs or an -initrd. It reads from zcore/mem and writes the system dump to a file on a -SCSI disk. +Since kernel version 3.12 also the /proc/vmcore file can also be used to access +the dump. -To build a zfcpdump kernel use the following settings in your kernel -configuration: - * CONFIG_ZFCPDUMP=y - * Enable ZFCP driver - * Enable SCSI driver - * Enable ext2 and ext3 filesystems - * Disable as many features as possible to keep the kernel small. - E.g. network support is not needed at all. +To get a valid zfcpdump kernel configuration use "make zfcpdump_defconfig". -To use the zfcpdump userspace application in an initramfs you have to do the -following: +The s390 zipl tool looks for the zfcpdump kernel and optional initrd/initramfs +under the following locations: - * Copy the zfcpdump executable somewhere into your Linux tree. - E.g. to "arch/s390/boot/zfcpdump. If you do not want to include - shared libraries, compile the tool with the "-static" gcc option. - * If you want to include e2fsck, add it to your source tree, too. The zfcpdump - application attempts to start /sbin/e2fsck from the ramdisk. - * Use an initramfs config file like the following: +* kernel: <zfcpdump directory>/zfcpdump.image +* ramdisk: <zfcpdump directory>/zfcpdump.rd - dir /dev 755 0 0 - nod /dev/console 644 0 0 c 5 1 - nod /dev/null 644 0 0 c 1 3 - nod /dev/sda1 644 0 0 b 8 1 - nod /dev/sda2 644 0 0 b 8 2 - nod /dev/sda3 644 0 0 b 8 3 - nod /dev/sda4 644 0 0 b 8 4 - nod /dev/sda5 644 0 0 b 8 5 - nod /dev/sda6 644 0 0 b 8 6 - nod /dev/sda7 644 0 0 b 8 7 - nod /dev/sda8 644 0 0 b 8 8 - nod /dev/sda9 644 0 0 b 8 9 - nod /dev/sda10 644 0 0 b 8 10 - nod /dev/sda11 644 0 0 b 8 11 - nod /dev/sda12 644 0 0 b 8 12 - nod /dev/sda13 644 0 0 b 8 13 - nod /dev/sda14 644 0 0 b 8 14 - nod /dev/sda15 644 0 0 b 8 15 - file /init arch/s390/boot/zfcpdump 755 0 0 - file /sbin/e2fsck arch/s390/boot/e2fsck 755 0 0 - dir /proc 755 0 0 - dir /sys 755 0 0 - dir /mnt 755 0 0 - dir /sbin 755 0 0 +The zfcpdump directory is defined in the s390-tools package. - * Issue "make image" to build the zfcpdump image with initramfs. +The user space application of zfcpdump can reside in an intitramfs or an +initrd. It can also be included in a built-in kernel initramfs. The application +reads from /proc/vmcore or zcore/mem and writes the system dump to a SCSI disk. -In a Linux distribution the zfcpdump enabled kernel image must be copied to -/usr/share/zfcpdump/zfcpdump.image, where the s390 zipl tool is looking for the -dump kernel when preparing a SCSI dump disk. - -If you use a ramdisk copy it to "/usr/share/zfcpdump/zfcpdump.rd". +The s390-tools package version 1.24.0 and above builds an external zfcpdump +initramfs with a user space application that writes the dump to a SCSI +partition. For more information on how to use zfcpdump refer to the s390 'Using the Dump Tools book', which is available from |