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Message-ID: <20250815103604.3857930-4-marievic@google.com>
Date: Fri, 15 Aug 2025 10:36:00 +0000
From: Marie Zhussupova <marievic@...gle.com>
To: rmoar@...gle.com, davidgow@...gle.com, shuah@...nel.org,
brendan.higgins@...ux.dev
Cc: mark.rutland@....com, elver@...gle.com, dvyukov@...gle.com,
lucas.demarchi@...el.com, thomas.hellstrom@...ux.intel.com,
rodrigo.vivi@...el.com, linux-kselftest@...r.kernel.org,
kunit-dev@...glegroups.com, kasan-dev@...glegroups.com,
intel-xe@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
linux-kernel@...r.kernel.org, Marie Zhussupova <marievic@...gle.com>
Subject: [PATCH v3 3/7] kunit: Pass parameterized test context to generate_params()
To enable more complex parameterized testing scenarios, the
generate_params() function needs additional context beyond just
the previously generated parameter. This patch modifies the
generate_params() function signature to include an extra
`struct kunit *test` argument, giving test users access to the
parameterized test context when generating parameters.
The `struct kunit *test` argument was added as the first parameter
to the function signature as it aligns with the convention of other
KUnit functions that accept `struct kunit *test` first. This also
mirrors the "this" or "self" reference found in object-oriented
programming languages.
This patch also modifies xe_pci_live_device_gen_param() in xe_pci.c
and nthreads_gen_params() in kcsan_test.c to reflect this signature
change.
Reviewed-by: David Gow <davidgow@...gle.com>
Reviewed-by: Rae Moar <rmoar@...gle.com>
Acked-by: Marco Elver <elver@...gle.com>
Acked-by: Rodrigo Vivi <rodrigo.vivi@...el.com>
Signed-off-by: Marie Zhussupova <marievic@...gle.com>
---
Changes in v3:
v2: https://lore.kernel.org/all/20250811221739.2694336-4-marievic@google.com/
- Commit message formatting.
Changes in v2:
v1: https://lore.kernel.org/all/20250729193647.3410634-4-marievic@google.com/
https://lore.kernel.org/all/20250729193647.3410634-5-marievic@google.com/
https://lore.kernel.org/all/20250729193647.3410634-6-marievic@google.com/
- generate_params signature changes in xe_pci.c and kcsan_test.c were
squashed into a single patch to avoid in-between breakages in the series.
- The comments and the commit message were changed to reflect the
parameterized testing terminology. See the patch series cover letter
change log for the definitions.
---
drivers/gpu/drm/xe/tests/xe_pci.c | 2 +-
include/kunit/test.h | 9 ++++++---
kernel/kcsan/kcsan_test.c | 2 +-
lib/kunit/test.c | 5 +++--
4 files changed, 11 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/xe/tests/xe_pci.c b/drivers/gpu/drm/xe/tests/xe_pci.c
index 1d3e2e50c355..62c016e84227 100644
--- a/drivers/gpu/drm/xe/tests/xe_pci.c
+++ b/drivers/gpu/drm/xe/tests/xe_pci.c
@@ -129,7 +129,7 @@ EXPORT_SYMBOL_IF_KUNIT(xe_pci_fake_device_init);
* Return: pointer to the next &struct xe_device ready to be used as a parameter
* or NULL if there are no more Xe devices on the system.
*/
-const void *xe_pci_live_device_gen_param(const void *prev, char *desc)
+const void *xe_pci_live_device_gen_param(struct kunit *test, const void *prev, char *desc)
{
const struct xe_device *xe = prev;
struct device *dev = xe ? xe->drm.dev : NULL;
diff --git a/include/kunit/test.h b/include/kunit/test.h
index d2e1b986b161..b527189d2d1c 100644
--- a/include/kunit/test.h
+++ b/include/kunit/test.h
@@ -128,7 +128,8 @@ struct kunit_attributes {
struct kunit_case {
void (*run_case)(struct kunit *test);
const char *name;
- const void* (*generate_params)(const void *prev, char *desc);
+ const void* (*generate_params)(struct kunit *test,
+ const void *prev, char *desc);
struct kunit_attributes attr;
int (*param_init)(struct kunit *test);
void (*param_exit)(struct kunit *test);
@@ -1691,7 +1692,8 @@ do { \
* Define function @name_gen_params which uses @array to generate parameters.
*/
#define KUNIT_ARRAY_PARAM(name, array, get_desc) \
- static const void *name##_gen_params(const void *prev, char *desc) \
+ static const void *name##_gen_params(struct kunit *test, \
+ const void *prev, char *desc) \
{ \
typeof((array)[0]) *__next = prev ? ((typeof(__next)) prev) + 1 : (array); \
if (__next - (array) < ARRAY_SIZE((array))) { \
@@ -1712,7 +1714,8 @@ do { \
* Define function @name_gen_params which uses @array to generate parameters.
*/
#define KUNIT_ARRAY_PARAM_DESC(name, array, desc_member) \
- static const void *name##_gen_params(const void *prev, char *desc) \
+ static const void *name##_gen_params(struct kunit *test, \
+ const void *prev, char *desc) \
{ \
typeof((array)[0]) *__next = prev ? ((typeof(__next)) prev) + 1 : (array); \
if (__next - (array) < ARRAY_SIZE((array))) { \
diff --git a/kernel/kcsan/kcsan_test.c b/kernel/kcsan/kcsan_test.c
index c2871180edcc..fc76648525ac 100644
--- a/kernel/kcsan/kcsan_test.c
+++ b/kernel/kcsan/kcsan_test.c
@@ -1383,7 +1383,7 @@ static void test_atomic_builtins_missing_barrier(struct kunit *test)
* The thread counts are chosen to cover potentially interesting boundaries and
* corner cases (2 to 5), and then stress the system with larger counts.
*/
-static const void *nthreads_gen_params(const void *prev, char *desc)
+static const void *nthreads_gen_params(struct kunit *test, const void *prev, char *desc)
{
long nthreads = (long)prev;
diff --git a/lib/kunit/test.c b/lib/kunit/test.c
index 917df2e1688d..ac8fa8941a6a 100644
--- a/lib/kunit/test.c
+++ b/lib/kunit/test.c
@@ -700,7 +700,7 @@ int kunit_run_tests(struct kunit_suite *suite)
/* Get initial param. */
param_desc[0] = '\0';
/* TODO: Make generate_params try-catch */
- curr_param = test_case->generate_params(NULL, param_desc);
+ curr_param = test_case->generate_params(&test, NULL, param_desc);
test_case->status = KUNIT_SKIPPED;
kunit_log(KERN_INFO, &test, KUNIT_SUBTEST_INDENT KUNIT_SUBTEST_INDENT
"KTAP version 1\n");
@@ -731,7 +731,8 @@ int kunit_run_tests(struct kunit_suite *suite)
/* Get next param. */
param_desc[0] = '\0';
- curr_param = test_case->generate_params(curr_param, param_desc);
+ curr_param = test_case->generate_params(&test, curr_param,
+ param_desc);
}
/*
* TODO: Put into a try catch. Since we don't need suite->exit
--
2.51.0.rc1.167.g924127e9c0-goog
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