- 05 Jan, 2011 40 commits
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Jan Glauber authored
HiperSocket devices only use one SBAL per qdio call without the enhanced SIGA feature. Since that feature is currently not used remove it from the qdio code so the compiler can generate better code for the HiperSocket outbound path. While at it mark the SIGA error conditions as unlikely. Signed-off-by:
Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by:
Martin Schwidefsky <schwidefsky@de.ibm.com>
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Jan Glauber authored
If QIOASSIST is enabled for a qdio device the SIGA instruction requires a modified function code. This function code modifier was missing for SIGA-R and SIGA-S which can lead to a kernel panic caused by an operand exception. Cc: stable@kernel.org Signed-off-by:
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Jan Glauber authored
Add a counter for outbound queue full events to the qdio statistics. Signed-off-by:
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Jan Glauber authored
Introduce a scan treshold for the qdio outbound queues. By setting the threshold the driver can tell qdio after how much used SBALs qdio should schedule the outbound tasklet that scans the queue for finished SBALs. The threshold is specific by the drivers because a Hipersockets device is much faster in utilizing outbound buffers than a ZFCP or OSA device. The default values after how many used SBALs the tasklet should run are: OSA: > 31 SBALs Hipersockets: > 7 SBALs zfcp: > 55 SBALs Signed-off-by:
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Jan Glauber authored
If the shared indicator is used the following race leads to an inbound stall: Device CPU0 CPU1 ======================================================== non-shared DSCI =>1 ALSI => 1 Thin INT ALSI => 0 non-shared DSCI tasklets scheduled shared DSCI => 1 ALSI => 1 shared DSCI => 0 ALSI ? -> set Thin INT ALSI => 0 ALSI was set, shared DSCI => 1 After that no more interrupts occur because the DSCI is still set. Fix that race by only resetting the shared DSCI if it was actually set so the tasklets for all shared devices are scheduled and will run after the interrupt. Signed-off-by: -
Felix Beck authored
Also process 4096 bit RSA keys in CRT format. Handle them like the smaller keys and take care of the zero padding. Signed-off-by:
Felix Beck <felix.beck@de.ibm.com> Signed-off-by:
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Felix Beck authored
The cca on the crypto adapter has a restriction in the size of the exponent if a key with a modulus bigger than 2048 bit is used. Thus in that case we have to avoid that the crypto device driver thinks the adapter is defect and sets it offline. Therfore a new member for the zcrypt_device struct called max_exp_bit_length is introduced. This will be set the first time the cca returns the error code function not implemented. If this is done with an adapter twice it will return -EINVAL. Signed-off-by:
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Felix Beck authored
Definitions for CEX3 card types are changed to support 4096 bit RSA keys in the coprocessor. Signed-off-by:
Ralph Wuerthner <ralph.wuerthner@de.ibm.com> Signed-off-by:
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Felix Beck authored
Definitions for CEX3 card types are changed to support 4096 bit RSA keys. Also new structs for the accelerator mode are needed. Additionaly when checking the length of key parts, the case for bigger (4096 bit) keys is needed. Signed-off-by:
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Felix Beck authored
Implemented an asm in the ap bus and made it accessible for the card specific parts of the zcrypt driver. Thus when a cex3a is recognized a check can be performed to dermine whether the card supports 4096 bit RSA keys. Signed-off-by:
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Michael Holzheu authored
Currently the buffer for diagnose data is allocated in the open function of the debugfs file and is released in the close function. This has the drawback that a user (root) can pin that memory by not closing the file. This patch moves the buffer allocation to the read function. The buffer is automatically released after the buffer is copied to userspace. Signed-off-by:
Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by:
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Martin Schwidefsky authored
Use thread_info lowcore field for current_thread_info(), saves an unnecessary calculation. Signed-off-by: -
Heiko Carstens authored
Get rid of register/unregister_early_external_interrupt() and clean up the code while at it. Signed-off-by:
Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by:
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Heiko Carstens authored
Use register_external_interrupt() instead of register_early_external_interrupt(). The early variant is not necessary since kmalloc works already. Signed-off-by:
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Heiko Carstens authored
Use an early init call to initialize pfault. That way it is possible to use the register_external_interrupt() instead of the early variant. No need to enable pfault any earlier since it has only effect if user space processes are running. Signed-off-by:
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Holger Dengler authored
Add support for AP Bus I/O interrupt statistics in /proc/interrupts. Signed-off-by:
Holger Dengler <hd@linux.vnet.ibm.com> Signed-off-by:
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Heiko Carstens authored
Add support for CTC I/O interrupt statistics in /proc/interrupts. Signed-off-by:
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Heiko Carstens authored
Add support for CLAW I/O interrupt statistics in /proc/interrupts. Signed-off-by:
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Heiko Carstens authored
Add support for LCS I/O interrupt statistics in /proc/interrupts. Signed-off-by:
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Heiko Carstens authored
Add support for VMUR I/O interrupt statistics in /proc/interrupts. Signed-off-by:
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Heiko Carstens authored
Add support for ccw based tape I/O interrupt statistics in /proc/interrupts. Signed-off-by:
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Heiko Carstens authored
Add support for 3270 I/O interrupt statistics in /proc/interrupts. Signed-off-by:
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Heiko Carstens authored
Add support for 3215 I/O interrupt statistics in /proc/interrupts. Signed-off-by:
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Heiko Carstens authored
Add support for DASD I/O interrupt statistics in /proc/interrupts. Signed-off-by:
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Jan Glauber authored
Count traditional qdio interrupts and adapter interrupts for qdio in the interrupt statistics. Signed-off-by:
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Heiko Carstens authored
Up to now /proc/interrupts only has statistics for external and i/o interrupts but doesn't split up them any further. This patch adds a line for every single interrupt source so that it is possible to easier tell what the machine is/was doing. Part of the output now looks like this; CPU0 CPU2 CPU4 EXT: 3898 4232 2305 I/O: 782 315 245 CLK: 1029 1964 727 [EXT] Clock Comparator IPI: 2868 2267 1577 [EXT] Signal Processor TMR: 0 0 0 [EXT] CPU Timer TAL: 0 0 0 [EXT] Timing Alert PFL: 0 0 0 [EXT] Pseudo Page Fault [...] NMI: 0 1 1 [NMI] Machine Checks Signed-off-by: -
Heiko Carstens authored
Let local_tick_enable/disable() reprogram the clock comparator so the function names make semantically more sense. Also that way the functions are more symmetric since normally each local_tick_enable() call usually would have a subsequent call to set_clock_comparator() anyway. Signed-off-by:
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Heiko Carstens authored
Move the two functions to timex.h where they make more sense than in hardirq.h. No functional change. Signed-off-by:
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Martin Schwidefsky authored
Add kprobes annotations to get the massive 'probe kernel.function("*") {}' stress test working. Signed-off-by: -
Martin Schwidefsky authored
Correct some minor coding style issues. Signed-off-by: -
Martin Schwidefsky authored
Restructure the kprobe breakpoint handler function. Add comments to make it more comprehensible and add a sanity check for re-entering kprobes. Signed-off-by: -
Martin Schwidefsky authored
Register %r14 and %r15 are already stored in jprobe_saved_regs, no need to store them a second time in jprobe_saved_r14 / jprobe_saved_r15. Signed-off-by: -
Martin Schwidefsky authored
The s390 architecture can execute code on kmalloc/vmalloc memory. No need for the __ARCH_WANT_KPROBES_INSN_SLOT detour. Signed-off-by: -
Martin Schwidefsky authored
Replace set_current_kprobe/reset_current_kprobe/save_previous_kprobe/ restore_previous_kprobe with a simpler scheme push_kprobe/pop_kprobe. The mini kprobes stack can store up to two active kprobes. Signed-off-by: -
Martin Schwidefsky authored
Determine instruction fixup details in resume_execution, no need to do it beforehand. Remove fixup, ilen and reg from arch_specific_insn. Signed-off-by: -
Martin Schwidefsky authored
Move the definition of the helper structure ins_replace_args to the only place where it is used and drop the old member as it is not needed. Signed-off-by: -
Martin Schwidefsky authored
The saved interrupt mask and the saved control registers are only relevant while single stepping is set up. A secondary kprobe while kprobe single stepping is active may not occur. That makes is safe to remove the save and restore of kprobe_saved_imask / kprobe_save_ctl from save_previous_kprobe and restore_previous_kprobe. Move all single step related code to two functions, enable_singlestep and disable_singlestep. Signed-off-by: -
Martin Schwidefsky authored
Remove special case of a kprobe on a breakpoint while a relocated instruction is single stepped. The only instruction that may cause a fault while kprobe single stepping is active is the relocated instruction. There is no kprobe on the instruction slot retrieved with get_insn_slot(). Signed-off-by: -
Martin Schwidefsky authored
Make use of def_bool and def_tristate where possible and add sensible defaults to the config symbols where applicable. This shortens the defconfig file by another ~40 lines. Signed-off-by: -
Felix Beck authored
Fix the check for ap interupts to look for facility bits 2 and 65. Make sure that we only register interrupts for aps, if the machine has ap interrupt support. This patch is relevant only for the 2.6.37 stable series. Cc: stable@kernel.org Signed-off-by:
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