kernel.git/arch/s390/kernel/traps.c, branch linux-3.19.y

s390/traps: die on translation exceptions

2014-11-21T07:49:33Z

Translation exceptions should never happen, since that implies that either we screwed up the page tables or missed to properly flush the TLB. In both cases we should not just simply kill user space or walk the kernel exception tables. Instead an oops or a panic (panic_on_oops) is the better answer. Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

s390/traps: print interrupt code and instruction length code

2014-11-21T07:49:30Z

It always confuses me to see the mixed instruction length code and interruption code on user space faults, while the message clearly says it is the interruption code. So split the value and print both values separately. Also add the ILC output to the die() message, so thar user and kernel space faults contain the same information. Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

s390/kprobes: make use of NOKPROBE_SYMBOL()

2014-10-27T12:27:28Z

Use NOKPROBE_SYMBOL() instead of __kprobes annotation. Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

s390: add support for vector extension

2014-10-09T07:14:13Z

The vector extension introduces 32 128-bit vector registers and a set of instruction to operate on the vector registers. The kernel can control the use of vector registers for the problem state program with a bit in control register 0. Once enabled for a process the kernel needs to retain the content of the vector registers on context switch. The signal frame is extended to include the vector registers. Two new register sets NT_S390_VXRS_LOW and NT_S390_VXRS_HIGH are added to the regset interface for the debugger and core dumps. Signed-off-by: Martin Schwidefsky

s390/uprobes: architecture backend for uprobes

2014-09-25T08:52:17Z

Signed-off-by: Jan Willeke Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

s390/dumpstack: fix call chain walking

2013-04-17T12:07:28Z

dumpstack() did not always print a sane callchain when being called. The reason is that show_trace() accessed register 15 directly to get the current stack pointer and passed that pointer to __show_trace() which expects a valid stack frame pointer as argument. However due to tail call optimization the stack frame may not exist anymore when __show_trace() gets called and therefore an invalid stack frame pointer gets passed. To prevent that disable tail call optimization for call chain walking functions. So move all the show_* functions to a dumpstack.c file like other architectures have it already and add a -fno-optimize-sibling-calls compile flag to both dumpstack.c and stacktrace.c to prevent tail call optimization. Fixes callchains that looked e.g. like this: [ 12.868258] Call Trace: [ 12.868262] ([<0000000000008000>] 0x8000) Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

taint: add explicit flag to show whether lock dep is still OK.

2013-01-21T06:47:57Z

Fix up all callers as they were before, with make one change: an unsigned module taints the kernel, but doesn't turn off lockdep. Signed-off-by: Rusty Russell

s390/traps: preinitialize program check table

2012-11-23T10:14:25Z

Preinitialize the program check table, so we can put it into the read-only data section. Also use only four byte entries for the table, since each program check handler resides within the first 2GB. Therefore this reduces the size of the table by 50% on 64 bit builds. Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

s390/traps: move call to print_modules() out of show_regs()

2012-09-26T13:45:27Z

Same as 0fa0e2f0 "x86: Move call to print_modules() out of show_regs()". Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

s390/exceptions: switch to relative exception table entries

2012-09-26T13:45:10Z

This is the s390 port of 70627654 "x86, extable: Switch to relative exception table entries". Reduces the size of our exception tables by 50% on 64 bit builds. Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky