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-rw-r--r--tools/testing/selftests/Makefile1
-rw-r--r--tools/testing/selftests/powerpc/Makefile2
-rw-r--r--tools/testing/selftests/powerpc/copyloops/asm/ppc_asm.h5
-rw-r--r--tools/testing/selftests/powerpc/mm/Makefile18
-rw-r--r--tools/testing/selftests/powerpc/mm/hugetlb_vs_thp_test.c72
-rw-r--r--tools/testing/selftests/sysctl/Makefile19
-rw-r--r--tools/testing/selftests/sysctl/common_tests109
-rw-r--r--tools/testing/selftests/sysctl/run_numerictests10
-rw-r--r--tools/testing/selftests/sysctl/run_stringtests77
9 files changed, 311 insertions, 2 deletions
diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index 32487ed1835..e66e710cc59 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -10,6 +10,7 @@ TARGETS += timers
TARGETS += vm
TARGETS += powerpc
TARGETS += user
+TARGETS += sysctl
all:
for TARGET in $(TARGETS); do \
diff --git a/tools/testing/selftests/powerpc/Makefile b/tools/testing/selftests/powerpc/Makefile
index 316194f26ff..b3dbe9ef1a4 100644
--- a/tools/testing/selftests/powerpc/Makefile
+++ b/tools/testing/selftests/powerpc/Makefile
@@ -13,7 +13,7 @@ CFLAGS := -Wall -O2 -flto -Wall -Werror -DGIT_VERSION='"$(GIT_VERSION)"' -I$(CUR
export CC CFLAGS
-TARGETS = pmu copyloops
+TARGETS = pmu copyloops mm
endif
diff --git a/tools/testing/selftests/powerpc/copyloops/asm/ppc_asm.h b/tools/testing/selftests/powerpc/copyloops/asm/ppc_asm.h
index ccd9c84c4e3..d1dc3742551 100644
--- a/tools/testing/selftests/powerpc/copyloops/asm/ppc_asm.h
+++ b/tools/testing/selftests/powerpc/copyloops/asm/ppc_asm.h
@@ -46,12 +46,15 @@
#define R20 r20
#define R21 r21
#define R22 r22
+#define R29 r29
+#define R30 r30
+#define R31 r31
#define STACKFRAMESIZE 256
-#define STK_PARAM(i) (48 + ((i)-3)*8)
#define STK_REG(i) (112 + ((i)-14)*8)
#define _GLOBAL(A) FUNC_START(test_ ## A)
+#define _GLOBAL_TOC(A) _GLOBAL(A)
#define PPC_MTOCRF(A, B) mtocrf A, B
diff --git a/tools/testing/selftests/powerpc/mm/Makefile b/tools/testing/selftests/powerpc/mm/Makefile
new file mode 100644
index 00000000000..357ccbd6bad
--- /dev/null
+++ b/tools/testing/selftests/powerpc/mm/Makefile
@@ -0,0 +1,18 @@
+noarg:
+ $(MAKE) -C ../
+
+PROGS := hugetlb_vs_thp_test
+
+all: $(PROGS)
+
+$(PROGS): ../harness.c
+
+run_tests: all
+ @-for PROG in $(PROGS); do \
+ ./$$PROG; \
+ done;
+
+clean:
+ rm -f $(PROGS)
+
+.PHONY: all run_tests clean
diff --git a/tools/testing/selftests/powerpc/mm/hugetlb_vs_thp_test.c b/tools/testing/selftests/powerpc/mm/hugetlb_vs_thp_test.c
new file mode 100644
index 00000000000..3d8e5b033e1
--- /dev/null
+++ b/tools/testing/selftests/powerpc/mm/hugetlb_vs_thp_test.c
@@ -0,0 +1,72 @@
+#include <stdio.h>
+#include <sys/mman.h>
+#include <unistd.h>
+
+#include "utils.h"
+
+/* This must match the huge page & THP size */
+#define SIZE (16 * 1024 * 1024)
+
+static int test_body(void)
+{
+ void *addr;
+ char *p;
+
+ addr = (void *)0xa0000000;
+
+ p = mmap(addr, SIZE, PROT_READ | PROT_WRITE,
+ MAP_HUGETLB | MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
+ if (p != MAP_FAILED) {
+ /*
+ * Typically the mmap will fail because no huge pages are
+ * allocated on the system. But if there are huge pages
+ * allocated the mmap will succeed. That's fine too, we just
+ * munmap here before continuing.
+ */
+ munmap(addr, SIZE);
+ }
+
+ p = mmap(addr, SIZE, PROT_READ | PROT_WRITE,
+ MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
+ if (p == MAP_FAILED) {
+ printf("Mapping failed @ %p\n", addr);
+ perror("mmap");
+ return 1;
+ }
+
+ /*
+ * Either a user or kernel access is sufficient to trigger the bug.
+ * A kernel access is easier to spot & debug, as it will trigger the
+ * softlockup or RCU stall detectors, and when the system is kicked
+ * into xmon we get a backtrace in the kernel.
+ *
+ * A good option is:
+ * getcwd(p, SIZE);
+ *
+ * For the purposes of this testcase it's preferable to spin in
+ * userspace, so the harness can kill us if we get stuck. That way we
+ * see a test failure rather than a dead system.
+ */
+ *p = 0xf;
+
+ munmap(addr, SIZE);
+
+ return 0;
+}
+
+static int test_main(void)
+{
+ int i;
+
+ /* 10,000 because it's a "bunch", and completes reasonably quickly */
+ for (i = 0; i < 10000; i++)
+ if (test_body())
+ return 1;
+
+ return 0;
+}
+
+int main(void)
+{
+ return test_harness(test_main, "hugetlb_vs_thp");
+}
diff --git a/tools/testing/selftests/sysctl/Makefile b/tools/testing/selftests/sysctl/Makefile
new file mode 100644
index 00000000000..0a92adaf086
--- /dev/null
+++ b/tools/testing/selftests/sysctl/Makefile
@@ -0,0 +1,19 @@
+# Makefile for sysctl selftests.
+# Expects kernel.sysctl_writes_strict=1.
+
+# No binaries, but make sure arg-less "make" doesn't trigger "run_tests".
+all:
+
+# Allow specific tests to be selected.
+test_num:
+ @/bin/sh ./run_numerictests
+
+test_string:
+ @/bin/sh ./run_stringtests
+
+run_tests: all test_num test_string
+
+# Nothing to clean up.
+clean:
+
+.PHONY: all run_tests clean test_num test_string
diff --git a/tools/testing/selftests/sysctl/common_tests b/tools/testing/selftests/sysctl/common_tests
new file mode 100644
index 00000000000..17d534b1b7b
--- /dev/null
+++ b/tools/testing/selftests/sysctl/common_tests
@@ -0,0 +1,109 @@
+#!/bin/sh
+
+TEST_FILE=$(mktemp)
+
+echo "== Testing sysctl behavior against ${TARGET} =="
+
+set_orig()
+{
+ echo "${ORIG}" > "${TARGET}"
+}
+
+set_test()
+{
+ echo "${TEST_STR}" > "${TARGET}"
+}
+
+verify()
+{
+ local seen
+ seen=$(cat "$1")
+ if [ "${seen}" != "${TEST_STR}" ]; then
+ return 1
+ fi
+ return 0
+}
+
+trap 'set_orig; rm -f "${TEST_FILE}"' EXIT
+
+rc=0
+
+echo -n "Writing test file ... "
+echo "${TEST_STR}" > "${TEST_FILE}"
+if ! verify "${TEST_FILE}"; then
+ echo "FAIL" >&2
+ exit 1
+else
+ echo "ok"
+fi
+
+echo -n "Checking sysctl is not set to test value ... "
+if verify "${TARGET}"; then
+ echo "FAIL" >&2
+ exit 1
+else
+ echo "ok"
+fi
+
+echo -n "Writing sysctl from shell ... "
+set_test
+if ! verify "${TARGET}"; then
+ echo "FAIL" >&2
+ exit 1
+else
+ echo "ok"
+fi
+
+echo -n "Resetting sysctl to original value ... "
+set_orig
+if verify "${TARGET}"; then
+ echo "FAIL" >&2
+ exit 1
+else
+ echo "ok"
+fi
+
+# Now that we've validated the sanity of "set_test" and "set_orig",
+# we can use those functions to set starting states before running
+# specific behavioral tests.
+
+echo -n "Writing entire sysctl in single write ... "
+set_orig
+dd if="${TEST_FILE}" of="${TARGET}" bs=4096 2>/dev/null
+if ! verify "${TARGET}"; then
+ echo "FAIL" >&2
+ rc=1
+else
+ echo "ok"
+fi
+
+echo -n "Writing middle of sysctl after synchronized seek ... "
+set_test
+dd if="${TEST_FILE}" of="${TARGET}" bs=1 seek=1 skip=1 2>/dev/null
+if ! verify "${TARGET}"; then
+ echo "FAIL" >&2
+ rc=1
+else
+ echo "ok"
+fi
+
+echo -n "Writing beyond end of sysctl ... "
+set_orig
+dd if="${TEST_FILE}" of="${TARGET}" bs=20 seek=2 2>/dev/null
+if verify "${TARGET}"; then
+ echo "FAIL" >&2
+ rc=1
+else
+ echo "ok"
+fi
+
+echo -n "Writing sysctl with multiple long writes ... "
+set_orig
+(perl -e 'print "A" x 50;'; echo "${TEST_STR}") | \
+ dd of="${TARGET}" bs=50 2>/dev/null
+if verify "${TARGET}"; then
+ echo "FAIL" >&2
+ rc=1
+else
+ echo "ok"
+fi
diff --git a/tools/testing/selftests/sysctl/run_numerictests b/tools/testing/selftests/sysctl/run_numerictests
new file mode 100644
index 00000000000..8510f93f2d1
--- /dev/null
+++ b/tools/testing/selftests/sysctl/run_numerictests
@@ -0,0 +1,10 @@
+#!/bin/sh
+
+SYSCTL="/proc/sys"
+TARGET="${SYSCTL}/vm/swappiness"
+ORIG=$(cat "${TARGET}")
+TEST_STR=$(( $ORIG + 1 ))
+
+. ./common_tests
+
+exit $rc
diff --git a/tools/testing/selftests/sysctl/run_stringtests b/tools/testing/selftests/sysctl/run_stringtests
new file mode 100644
index 00000000000..90a9293d520
--- /dev/null
+++ b/tools/testing/selftests/sysctl/run_stringtests
@@ -0,0 +1,77 @@
+#!/bin/sh
+
+SYSCTL="/proc/sys"
+TARGET="${SYSCTL}/kernel/domainname"
+ORIG=$(cat "${TARGET}")
+TEST_STR="Testing sysctl"
+
+. ./common_tests
+
+# Only string sysctls support seeking/appending.
+MAXLEN=65
+
+echo -n "Writing entire sysctl in short writes ... "
+set_orig
+dd if="${TEST_FILE}" of="${TARGET}" bs=1 2>/dev/null
+if ! verify "${TARGET}"; then
+ echo "FAIL" >&2
+ rc=1
+else
+ echo "ok"
+fi
+
+echo -n "Writing middle of sysctl after unsynchronized seek ... "
+set_test
+dd if="${TEST_FILE}" of="${TARGET}" bs=1 seek=1 2>/dev/null
+if verify "${TARGET}"; then
+ echo "FAIL" >&2
+ rc=1
+else
+ echo "ok"
+fi
+
+echo -n "Checking sysctl maxlen is at least $MAXLEN ... "
+set_orig
+perl -e 'print "A" x ('"${MAXLEN}"'-2), "B";' | \
+ dd of="${TARGET}" bs="${MAXLEN}" 2>/dev/null
+if ! grep -q B "${TARGET}"; then
+ echo "FAIL" >&2
+ rc=1
+else
+ echo "ok"
+fi
+
+echo -n "Checking sysctl keeps original string on overflow append ... "
+set_orig
+perl -e 'print "A" x ('"${MAXLEN}"'-1), "B";' | \
+ dd of="${TARGET}" bs=$(( MAXLEN - 1 )) 2>/dev/null
+if grep -q B "${TARGET}"; then
+ echo "FAIL" >&2
+ rc=1
+else
+ echo "ok"
+fi
+
+echo -n "Checking sysctl stays NULL terminated on write ... "
+set_orig
+perl -e 'print "A" x ('"${MAXLEN}"'-1), "B";' | \
+ dd of="${TARGET}" bs="${MAXLEN}" 2>/dev/null
+if grep -q B "${TARGET}"; then
+ echo "FAIL" >&2
+ rc=1
+else
+ echo "ok"
+fi
+
+echo -n "Checking sysctl stays NULL terminated on overwrite ... "
+set_orig
+perl -e 'print "A" x ('"${MAXLEN}"'-1), "BB";' | \
+ dd of="${TARGET}" bs=$(( $MAXLEN + 1 )) 2>/dev/null
+if grep -q B "${TARGET}"; then
+ echo "FAIL" >&2
+ rc=1
+else
+ echo "ok"
+fi
+
+exit $rc
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-06-01 16:47:34 +0000