Changes in ftrace.c

6644c654 - ftrace: Cleanup ftrace_dyn_arch_init()

Thu, 09 Sep 2021 09:02:16 +0000

ftrace: Cleanup ftrace_dyn_arch_init()Most of ARCHs use empty ftrace_dyn_arch_init(), introduce a weak commonftrace_dyn_arch_init() to cleanup them.Link: https://lkml.kernel.org/r/20210909090216.1955240-1-o451686892@gmail.comAcked-by: Heiko Carstens (s390)Acked-by: Helge Deller (parisc)Signed-off-by: Weizhao Ouyang Signed-off-by: Steven Rostedt (VMware) List of files: /linux-6.15/arch/microblaze/kernel/ftrace.c

556763e5 - microblaze: function_graph: Simplify with function_graph_enter()

Sun, 18 Nov 2018 22:23:30 +0000

microblaze: function_graph: Simplify with function_graph_enter()The function_graph_enter() function does the work of calling the functiongraph hook function and the management of the shadow stack, simplifying thework done in the architecture dependent prepare_ftrace_return().Have microblaze use the new code, and remove the shadow stack management as well ashaving to set up the trace structure.This is needed to prepare for a fix of a design bug on how the curr_ret_stackis used.Cc: Michal Simek Cc: stable@kernel.orgFixes: 03274a3ffb449 ("tracing/fgraph: Adjust fgraph depth before calling trace return callback")Reviewed-by: Masami Hiramatsu Signed-off-by: Steven Rostedt (VMware) List of files: /linux-6.15/arch/microblaze/kernel/ftrace.c

9a7c348b - ftrace: Add return address pointer to ftrace_ret_stack

Fri, 19 Aug 2016 11:52:57 +0000

ftrace: Add return address pointer to ftrace_ret_stackStoring this value will help prevent unwinders from getting out of syncwith the function graph tracer ret_stack. Now instead of needing astateful iterator, they can compare the return address pointer to findthe right ret_stack entry.Note that an array of 50 ftrace_ret_stack structs is allocated for everytask. So when an arch implements this, it will add either 200 or 400bytes of memory usage per task (depending on whether it's a 32-bit or64-bit platform).Signed-off-by: Josh Poimboeuf Acked-by: Steven Rostedt Cc: Andy Lutomirski Cc: Andy Lutomirski Cc: Borislav Petkov Cc: Brian Gerst Cc: Byungchul Park Cc: Denys Vlasenko Cc: Frederic Weisbecker Cc: H. Peter Anvin Cc: Kees Cook Cc: Linus Torvalds Cc: Nilay Vaish Cc: Peter Zijlstra Cc: Thomas Gleixner Link: http://lkml.kernel.org/r/a95cfcc39e8f26b89a430c56926af0bb217bc0a1.1471607358.git.jpoimboe@redhat.comSigned-off-by: Ingo Molnar List of files: /linux-6.15/arch/microblaze/kernel/ftrace.c

e1dc5007 - microblaze: ftrace: Add call to ftrace_graph_is_dead() in function graph code

Wed, 25 Jun 2014 13:43:31 +0000

microblaze: ftrace: Add call to ftrace_graph_is_dead() in function graph codeftrace_stop() is going away as it disables parts of function tracingthat affects users that should not be affected. But ftrace_graph_stop()is built on ftrace_stop(). Here's another example of killing all offunction tracing because something went wrong with function graphtracing.Instead of disabling all users of function tracing on function grapherror, disable only function graph tracing. To do this, the arch codemust call ftrace_graph_is_dead() before it implements function graph.Link: http://lkml.kernel.org/r/53C8D874.9090601@monstr.euTested-by: Michal Simek Signed-off-by: Steven Rostedt List of files: /linux-6.15/arch/microblaze/kernel/ftrace.c

3a36cb11 - ftrace: Do not pass data to ftrace_dyn_arch_init

Mon, 24 Feb 2014 18:59:59 +0000

ftrace: Do not pass data to ftrace_dyn_arch_initAs the data parameter is not really used by any ftrace_dyn_arch_init,remove that from ftrace_dyn_arch_init. This also removes the addrlocal variable from ftrace_init which is now unused.Note the documentation was imprecise as it did not suggest to set(*data) to 0.Link: http://lkml.kernel.org/r/1393268401-24379-4-git-send-email-jslaby@suse.czCc: Frederic Weisbecker Cc: Ingo Molnar Cc: linux-arch@vger.kernel.orgSigned-off-by: Jiri Slaby Signed-off-by: Steven Rostedt List of files: /linux-6.15/arch/microblaze/kernel/ftrace.c

af64a7cb - ftrace: Pass retval through return in ftrace_dyn_arch_init()

Mon, 24 Feb 2014 18:59:58 +0000

ftrace: Pass retval through return in ftrace_dyn_arch_init()No architecture uses the "data" parameter in ftrace_dyn_arch_init() in anyway, it just sets the value to 0. And this is used as a return valuein the caller -- ftrace_init, which just checks the retval againstzero.Note there is also "return 0" in every ftrace_dyn_arch_init. So it isenough to check the retval and remove all the indirect sets of data onall archs.Link: http://lkml.kernel.org/r/1393268401-24379-3-git-send-email-jslaby@suse.czCc: linux-arch@vger.kernel.orgSigned-off-by: Jiri Slaby Signed-off-by: Steven Rostedt List of files: /linux-6.15/arch/microblaze/kernel/ftrace.c

6bd55f0b - microblaze: Fix coding style issues

Thu, 27 Dec 2012 09:40:38 +0000

microblaze: Fix coding style issuesFix coding style issues reported by checkpatch.pl.Signed-off-by: Michal Simek List of files: /linux-6.15/arch/microblaze/kernel/ftrace.c

9e1491de - microblaze: Fix ftrace

Fri, 18 Mar 2011 12:52:27 +0000

microblaze: Fix ftrace- Do not trace idle loop which takes a lot time- Fix cache handling in generic ftrace code- Do not trace lib functions ashldi3, ashrdi3, lshrdi3 Functions are called from generic ftrace code which can't be tracedSigned-off-by: Michal Simek List of files: /linux-6.15/arch/microblaze/kernel/ftrace.c

d2bf98e6 - microblaze: Fix ftrace_update_ftrace_func panic

Fri, 02 Apr 2010 18:29:39 +0000

microblaze: Fix ftrace_update_ftrace_func panicThe Microblaze dynamic ftrace code assumes a call ordering that is not metin all scenarios. Specifically, executing a command similar to: echo 105 > /sys/kernel/debug/tracing/set_ftrace_pidbefore any other tracing-related commands results in a kernel panic: BUG: failure at arch/microblaze/kernel/ftrace.c:198/ftrace_update_ftrace_func()!Recoding ftrace_update_ftrace_func() to use &ftrace_caller directly eliminatesthe need to capture its address elsewhere (and thus rely on a particular callsequence).Signed-off-by: Steven J. Magnani Signed-off-by: Michal Simek List of files: /linux-6.15/arch/microblaze/kernel/ftrace.c

4f911b0d - microblaze: ftrace: Add dynamic function graph tracer

Mon, 16 Nov 2009 09:34:15 +0000

microblaze: ftrace: Add dynamic function graph tracerThis patch add support for dynamic function graph tracer.There is one my expactation that I can do flush_icache afterall code modification. On microblaze is this safer than doflush for every entry. For icache is used name flush butcorrect should be invalidation - this will be fix in upcommingnew cache implementaion and WB support.Signed-off-by: Michal Simek List of files: /linux-6.15/arch/microblaze/kernel/ftrace.c

a0d3e665 - microblaze: ftrace: add function graph support

Mon, 16 Nov 2009 09:32:10 +0000

microblaze: ftrace: add function graph supportFor more information look at Documentation/trace folder.Signed-off-by: Michal Simek List of files: /linux-6.15/arch/microblaze/kernel/ftrace.c

7d241ff0 - microblaze: ftrace: Add dynamic trace support

Thu, 10 Dec 2009 13:15:44 +0000

microblaze: ftrace: Add dynamic trace supportWith dynamic function tracer, by default, _mcount is defined as an"empty" function, it returns directly without any more action. Whenenabling it in user-space, it will jump to a real tracingfunction(ftrace_caller), and do the real job for us.Differ from the static function tracer, dynamic function tracer providestwo functions ftrace_make_call()/ftrace_make_nop() to enable/disable thetracing of some indicated kernel functions(set_ftrace_filter).In the kernel version, there is only one "_mcount" string for everykernel function, so, we just need to match this one in mcount_regex ofscripts/recordmcount.pl.For more information please look at code and Documentation/trace folder.Steven ACK that scripts/recordmcount.pl part.Acked-by: Steven Rostedt Signed-off-by: Michal Simek List of files: /linux-6.15/arch/microblaze/kernel/ftrace.c