- 25 9月, 2014 1 次提交
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由 Jan Willeke 提交于
Signed-off-by: NJan Willeke <willeke@de.ibm.com> Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 09 9月, 2014 1 次提交
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由 Heiko Carstens 提交于
We have too many combinations for function tracing. Lets simply stick to the most advanced option, so we don't have to care of other combinations. This means we always select DYNAMIC_FTRACE if FUNCTION_TRACER is selected. In the s390 Makefile also remove CONFIG_FTRACE_SYSCALLS since that functionality got moved to architecture independent code in the meantime. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 07 3月, 2014 1 次提交
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由 Heiko Carstens 提交于
The whole compat exec domain code doesn't make any difference. From the registered s390_exec_domain: - exec domain name is only displayed in /proc/execdomains - handler is unused - pers_low and pers_high are only used internally to find this specific exec domain otherwise the default exec domain will be used - all other fields match the default exec domain So let's get rid of this. Reported-by: NThomas Gleixner <tglx@linutronix.de> Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 06 3月, 2014 1 次提交
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由 Heiko Carstens 提交于
Now that all compat syscalls have been converted to use the COMPAT_SYSCALL_DEFINE macros, we don't need to compat syscall wrapper assembly code anymore. So remove it and fix up the system call table accordingly. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
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- 04 3月, 2014 1 次提交
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由 Heiko Carstens 提交于
Introduce a new compat_wrap.c file which contains the s390 specific compat system call wrappers. The s390 specific system call wrappers only perform sign, zero and pointer conversion of system call arguments before actually calling the non-compat system call. Therefore introduce COMPAT_SYSCALL_WRAPx macros which generate C code that is nearly identical to the assembly code. This has the advantage that the compile will generate correct code, and we avoid the frequent copy-paste errors seen in the compat_wrapper.S file. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
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- 16 12月, 2013 2 次提交
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由 Hendrik Brueckner 提交于
Introduce a perf PMU, "cpum_sf", to support the CPU-Measurement Sampling Facility. You can control the sampling facility through this perf PMU interfaces. Perf sampling events are created for hardware samples. For details about the CPU-Measurement Sampling Facility, see "The Load-Program-Parameter and the CPU-Measurement Facilities" (SA23-2260). Signed-off-by: NHendrik Brueckner <brueckner@linux.vnet.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Hendrik Brueckner 提交于
Provide PMU event attributes for supported counters and export their symbolic names to the sysfs "events" directory. See the /sys/devices/cpum_cf/events/ directory for a list of available counters. Note that you might require counter set authorizations for the LPAR to use them. Signed-off-by: NHendrik Brueckner <brueckner@linux.vnet.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 24 10月, 2013 1 次提交
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由 Heiko Carstens 提交于
Just like all other architectures we should use out-of-line find bit operations, since the inline variant bloat the size of the kernel image. And also like all other architecures we should only supply optimized variants of the __ffs, ffs, etc. primitives. Therefore this patch removes the inlined s390 find bit functions and uses the generic out-of-line variants instead. The optimization of the primitives follows with the next patch. With this patch also the functions find_first_bit_left() and find_next_bit_left() have been reimplemented, since logically, they are nothing else but a find_first_bit()/find_next_bit() implementation that use an inverted __fls() instead of __ffs(). Also the restriction that these functions only work on machines which support the "flogr" instruction is gone now. This reduces the size of the kernel image (defconfig, -march=z9-109) by 144,482 bytes. Alone the size of the function build_sched_domains() gets reduced from 7 KB to 3,5 KB. We also git rid of unused functions like find_first_bit_le()... Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 02 5月, 2013 1 次提交
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由 Heiko Carstens 提交于
Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 17 4月, 2013 1 次提交
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由 Heiko Carstens 提交于
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: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 23 11月, 2012 1 次提交
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由 Heiko Carstens 提交于
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: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 26 9月, 2012 5 次提交
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由 Heiko Carstens 提交于
Since "Kconfig: split the s390 base menu" CONFIG_KEXEC gets always selected. Therefore there is no point in keeping CONFIG_KEXEC anywhere. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Heiko Carstens 提交于
The whole hardware support is only available in zArch mode. Fixes also this compile warning: arch/s390/kernel/perf_cpum_cf.c: In function ‘cpumf_pmu_init’: arch/s390/kernel/perf_cpum_cf.c:670:2: warning: left shift count >= width of type [enabled by default] Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Jan Glauber 提交于
Allow user-space threads to use runtime instrumentation (RI). To enable RI for a thread there is a new s390 specific system call, sys_s390_runtime_instr, that takes as parameter a realtime signal number. If the RI facility is available the system call sets up a control block for the calling thread with the appropriate permissions for the thread to modify the control block. The user-space thread can then use the store and modify RI instructions to alter the control block and start/stop the instrumentation via RION/RIOFF. If the user specified program buffer runs full RI triggers an external interrupt. The external interrupt is translated to a real-time signal that is delivered to the thread that enabled RI on that CPU. The number of the real-time signal is the number specified in the RI system call. So, user-space can select any available real-time signal number in case the application itself uses real-time signals for other purposes. The kernel saves the RI control blocks on task switch only if the running thread was enabled for RI. Therefore, the performance impact on task switch should be negligible if RI is not used. RI is only enabled for user-space mode and is disabled for the supervisor state. Reviewed-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NJan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Heiko Carstens 提交于
machine_crash_shutdown() was the only function in crash.c. So move the function and delete one file. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Heiko Carstens 提交于
Expose cpu cache topology via sysfs. The created sysfs directory structure is compatible to what x86, ia64 and powerpc have. On s390 we expose only information about cpu caches which are private to a cpu via sysfs . Caches which are shared between cpus do not have a sysfs representation. The reason for that is that the file "shared_cpu_map" is mandatory and only if running under LPAR it is possible to tell which cpus share which cache. Second level hypervisors however do not and cannot expose that information to guests. In order to have a consistent view we made the choice to always only expose information about private cpu caches via sysfs. Example for a z196 cpu (cpu1 in /sys/devices/cpu): cpu1/cache/index0/size -- 64K cpu1/cache/index0/type -- Data cpu1/cache/index0/level -- 1 cpu1/cache/index0/number_of_sets -- 64 cpu1/cache/index0/shared_cpu_map -- 00000000,00000002 cpu1/cache/index0/shared_cpu_list -- 1 cpu1/cache/index0/coherency_line_size -- 256 cpu1/cache/index0/ways_of_associativity -- 4 cpu1/cache/index1/size -- 128K cpu1/cache/index1/type -- Instruction cpu1/cache/index1/level -- 1 cpu1/cache/index1/number_of_sets -- 64 cpu1/cache/index1/shared_cpu_map -- 00000000,00000002 cpu1/cache/index1/shared_cpu_list -- 1 cpu1/cache/index1/coherency_line_size -- 256 cpu1/cache/index1/ways_of_associativity -- 8 cpu1/cache/index2/size -- 1536K cpu1/cache/index2/type -- Unified cpu1/cache/index2/level -- 2 cpu1/cache/index2/number_of_sets -- 512 cpu1/cache/index2/shared_cpu_map -- 00000000,00000002 cpu1/cache/index2/shared_cpu_list -- 1 cpu1/cache/index2/coherency_line_size -- 256 cpu1/cache/index2/ways_of_associativity -- 12 Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 05 5月, 2012 1 次提交
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由 Thomas Gleixner 提交于
Same code. Use the generic version. The special Makefile treatment is pointless anyway as init_task.o contains only data which is handled by the linker script. So no point on being treated like head text. Signed-off-by: NThomas Gleixner <tglx@linutronix.de> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Acked-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Link: http://lkml.kernel.org/r/20120503085035.271439530@linutronix.de
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- 23 3月, 2012 1 次提交
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由 Hendrik Brueckner 提交于
Add a perf PMU to access the CPU-measurement counter facility CPUM CF. CPUM CF provides multiple counter sets for measuring generic, problem-state, and crypto activaties. Also an extended counter set for the IBM System z10 and IBM z196 mainframes is available. Counters from the basic and problem-state counter set are mapped to generic perf hardware events. Other counters are accessible through raw events. For a list of available counter sets and counters, see: - The Load-Program-Parameter and the CPU-Measurement Facilities (SA23-2260) - The CPU-Measurement Facility Extended Counters Definition for z10 and z196 (SA23-2261) Reviewed-by: NJan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: NHendrik Brueckner <brueckner@linux.vnet.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 11 3月, 2012 3 次提交
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由 Michael Holzheu 提交于
In order to allow kdump based stand-alone dump, some information has to be passed from the old kernel to the new dump kernel. This is done via a the struct "os_info" that contains the following fields: * crashkernel base and size * reipl block * vmcoreinfo * init function A pointer to os_info is stored at a well known storage location and the whole structure as well as all fields are secured with checksums. Signed-off-by: NMichael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Michael Holzheu 提交于
Currently the following mechanisms are available to move active Linux on System z instances between machines: * z/VM 6.2 SSI (Single System Image) * Suspend/resume For moving Linux instances in this patch the term LGR (Linux Guest Relocation) is used. Because such an operation is critical, it should be detectable from Linux. With this patch for both, a live system and a kernel dump, the information about LGRs is accessible. To identify a guest, stsi and stfle data is used. A new function lgr_info_log() compares the current data (lgr_info_cur) with the last recorded one (lgr_info_last). In case the two data sets differ, lgr_info_cur is logged to the "lgr" s390dbf. The following trigger points call lgr_info_log(): * panic * die * kdump * LGR timer * PSW restart * QDIO recovery * resume This patch also changes the s390dbf hex_ascii view. Now only printable ASCII characters are shown. Reviewed-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMichael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Martin Schwidefsky 提交于
Define struct pcpu and merge some of the NR_CPUS arrays into it, including __cpu_logical_map, current_set and smp_cpu_state. Split smp related functions to those operating on physical cpus and the functions operating on a logical cpu number. Make the functions for physical cpus use a pointer to a struct pcpu. This hides the knowledge about cpu addresses in smp.c, entry[64].S and swsusp_asm64.S, thus remove the sigp.h header. The PSW restart mechanism is used to start secondary cpus, calling a function on an online cpu, calling a function on the ipl cpu, and for the nmi signal. Replace the different assembler functions with a single function restart_int_handler. The new entry point calls a function whose pointer is stored in the lowcore of the target cpu and it can wait for the source cpu to stop. This covers all existing use cases. Overall the code is now simpler and there are ~380 lines less code. Reviewed-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 27 12月, 2011 1 次提交
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由 Heiko Carstens 提交于
Remove all ifdefs from topology code and also only compile it for the CONFIG_SCHED_BOOK case. The new code selects SCHED_MC if SCHED_BOOK is selected. SCHED_MC without SCHED_BOOK is not possible anymore. Furthermore various sysfs attributes are not available anymore for the !SCHED_BOOK case. In particular all attributes that correspond to CPU polarization. But since all real world kernels have SCHED_BOOK selected anyway this doesn't matter too much. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 30 10月, 2011 1 次提交
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由 Michael Holzheu 提交于
This patch provides the architecture specific part of the s390 kdump support. Signed-off-by: NMichael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 26 5月, 2011 1 次提交
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由 Heiko Carstens 提交于
Merge irq.c and s390_ext.c into irq.c. That way all external interrupt related functions are together. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 05 4月, 2011 1 次提交
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由 Jan Glauber 提交于
Implement the architecture backend for jump label support on s390. For a shared kernel booted from a NSS silently disable jump labels because the NSS is read-only. Therefore jump labels will be disabled in a shared kernel and can't be activated. Signed-off-by: NJan Glauber <jang@linux.vnet.ibm.com> LKML-Reference: <6935d2c41ce111e1719176ed4bbd3dbe4de80855.1300299760.git.jbaron@redhat.com> Acked-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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- 27 2月, 2010 2 次提交
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由 Martin Schwidefsky 提交于
Add the "bzImage" compile target and the necessary code to generate compressed kernel images. The old style uncompressed "image" target is preserved, a simple make will build them both. Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Heiko Carstens 提交于
Always reboot on logical cpu 0. This makes sure that the IPL cpu is always the same and usually avoids strange numbering schemes between physical and logical cpus. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 07 12月, 2009 1 次提交
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由 Aristeu Rozanski 提交于
Trying to build a s390x kernel with CONFIG_FTRACE_SYSCALLS will fail because ftrace.o is not built/linked. Acked-by: NFrederic Weisbecker <fweisbec@gmail.com> Signed-off-by: NAristeu Rozanski <aris@redhat.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 11 9月, 2009 2 次提交
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由 Heiko Carstens 提交于
Merge the nearly empty C files and move everything from power/ to kernel/. That way the files are easier to handle. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Martin Schwidefsky 提交于
Move the 64 bit mount code from mcount.S into mcount64.S and avoid code duplication. Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 12 6月, 2009 3 次提交
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由 Heiko Carstens 提交于
Function graph tracer support for s390. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Heiko Carstens 提交于
Dynamic ftrace support for s390. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Heiko Carstens 提交于
This adds a mini sclp device driver for very early use. The primary and probably only use will be to emit a message to the console if the cpu doesn't provide the minimum required capabilities to run the kernel. After printing the message a disabled wait will be loaded and the machine stops operating. Printing the message is also part of this patch. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 26 3月, 2009 2 次提交
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由 Heiko Carstens 提交于
Split machine check handler code and move it to cio and kernel code where it belongs to. No functional change. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Heiko Carstens 提交于
All in sysinfo.c is core kernel code and not driver code. So move it to arch/s390/kernel. Also includes some small cleanups. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 25 12月, 2008 4 次提交
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由 Martin Schwidefsky 提交于
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Martin Schwidefsky 提交于
On s390 we always want to run with precise cputime accounting. Remove the config options VIRT_TIMER and VIRT_CPU_ACCOUNTING. Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Heiko Carstens 提交于
This implements just the basic function tracer (_mcount) backend for s390. The dynamic variant will come later. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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由 Martin Schwidefsky 提交于
Add a vdso to speed up gettimeofday and clock_getres/clock_gettime for CLOCK_REALTIME/CLOCK_MONOTONIC. Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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- 14 7月, 2008 1 次提交
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由 Heiko Carstens 提交于
Move memory detection code to own file and also simplify it. Also add an interface which can be called at any time to get the current memory layout. This interface is needed by our kernel internal system dumper. Cc: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Cc: Michael Holzheu <holzheu@de.ibm.com> Cc: Frank Munzert <munzert@de.ibm.com> Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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