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powerpc fixes for 6.6 #3 

- Fix arch_stack_walk_reliable(), used by live patching.
 
  - Fix powerpc selftests to work with run_kselftest.sh
 
 Thanks to: Joe Lawrence, Petr Mladek.
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Merge tag 'powerpc-6.6-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc fixes from Michael Ellerman:

 - Fix arch_stack_walk_reliable(), used by live patching

 - Fix powerpc selftests to work with run_kselftest.sh

Thanks to Joe Lawrence and Petr Mladek.

* tag 'powerpc-6.6-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  selftests/powerpc: Fix emit_tests to work with run_kselftest.sh
  powerpc/stacktrace: Fix arch_stack_walk_reliable()
This commit is contained in:
Linus Torvalds 2023-09-30 09:53:09 -07:00
parent ae21363998 58b33e78a3
commit 1c9d831221
3 changed files with 14 additions and 31 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
arch/powerpc/kernel/stacktrace.c
View File

@ -73,29 +73,12 @@ int __no_sanitize_address arch_stack_walk_reliable(stack_trace_consume_fn consum
bool firstframe;
stack_end = stack_page + THREAD_SIZE;
if (!is_idle_task(task)) {
/*
* For user tasks, this is the SP value loaded on
* kernel entry, see "PACAKSAVE(r13)" in _switch() and
* system_call_common().
*
* Likewise for non-swapper kernel threads,
* this also happens to be the top of the stack
* as setup by copy_thread().
*
* Note that stack backlinks are not properly setup by
* copy_thread() and thus, a forked task() will have
* an unreliable stack trace until it's been
* _switch()'ed to for the first time.
*/
stack_end -= STACK_USER_INT_FRAME_SIZE;
} else {
/*
* idle tasks have a custom stack layout,
* c.f. cpu_idle_thread_init().
*/
// See copy_thread() for details.
if (task->flags & PF_KTHREAD)
stack_end -= STACK_FRAME_MIN_SIZE;
}
else
stack_end -= STACK_USER_INT_FRAME_SIZE;
if (task == current)
sp = current_stack_frame();

7
tools/testing/selftests/powerpc/Makefile
View File

@ -59,12 +59,11 @@ override define INSTALL_RULE
done;
endef
override define EMIT_TESTS
emit_tests:
+@for TARGET in $(SUB_DIRS); do \
BUILD_TARGET=$(OUTPUT)/$$TARGET; \
$(MAKE) OUTPUT=$$BUILD_TARGET -s -C $$TARGET emit_tests;\
$(MAKE) OUTPUT=$$BUILD_TARGET -s -C $$TARGET $@;\
done;
endef
override define CLEAN
+@for TARGET in $(SUB_DIRS); do \
@ -77,4 +76,4 @@ endef
tags:
find . -name '*.c' -o -name '*.h' | xargs ctags
.PHONY: tags $(SUB_DIRS)
.PHONY: tags $(SUB_DIRS) emit_tests

11
tools/testing/selftests/powerpc/pmu/Makefile
View File

@ -30,13 +30,14 @@ override define RUN_TESTS
+TARGET=event_code_tests; BUILD_TARGET=$$OUTPUT/$$TARGET; $(MAKE) OUTPUT=$$BUILD_TARGET -C $$TARGET run_tests
endef
DEFAULT_EMIT_TESTS := $(EMIT_TESTS)
override define EMIT_TESTS
$(DEFAULT_EMIT_TESTS)
emit_tests:
for TEST in $(TEST_GEN_PROGS); do \
BASENAME_TEST=`basename $$TEST`; \
echo "$(COLLECTION):$$BASENAME_TEST"; \
done
+TARGET=ebb; BUILD_TARGET=$$OUTPUT/$$TARGET; $(MAKE) OUTPUT=$$BUILD_TARGET -s -C $$TARGET emit_tests
+TARGET=sampling_tests; BUILD_TARGET=$$OUTPUT/$$TARGET; $(MAKE) OUTPUT=$$BUILD_TARGET -s -C $$TARGET emit_tests
+TARGET=event_code_tests; BUILD_TARGET=$$OUTPUT/$$TARGET; $(MAKE) OUTPUT=$$BUILD_TARGET -s -C $$TARGET emit_tests
endef
DEFAULT_INSTALL_RULE := $(INSTALL_RULE)
override define INSTALL_RULE
@ -64,4 +65,4 @@ sampling_tests:
event_code_tests:
TARGET=$@; BUILD_TARGET=$$OUTPUT/$$TARGET; mkdir -p $$BUILD_TARGET; $(MAKE) OUTPUT=$$BUILD_TARGET -k -C $$TARGET all
.PHONY: all run_tests ebb sampling_tests event_code_tests
.PHONY: all run_tests ebb sampling_tests event_code_tests emit_tests