[PATCH 2/7] cxl/test: Add type2 support for mock CFMWS0

Dave Jiang
2026-04-22T23:02:42Z

Add a module parameter 'type2_test' for triggering type2 test support
in cxl_test. Setup the CFMWS0 configuration to be type2 when 'type2_test'
is set.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
---
tools/testing/cxl/test/cxl.c | 27 ++++++++++++++++++++++++++-
1 file changed, 26 insertions(+), 1 deletion(-)

diff --git a/tools/testing/cxl/test/cxl.c b/tools/testing/cxl/test/cxl.c
index c26c37cef12c..903223013e41 100644
--- a/tools/testing/cxl/test/cxl.c
+++ b/tools/testing/cxl/test/cxl.c
@@ -16,6 +16,7 @@

static int interleave_arithmetic;
static bool extended_linear_cache;
+static bool type2_test;

#define FAKE_QTG_ID 42

@@ -383,6 +384,19 @@ static struct {
},
};

+static struct acpi_cedt_cfmws type2_cfmws0 = {
+ .header = {
+ .type = ACPI_CEDT_TYPE_CFMWS,
+ .length = sizeof(mock_cedt.cfmws0),
+ },
+ .interleave_ways = 0,
+ .granularity = 4,
+ .restrictions = ACPI_CEDT_CFMWS_RESTRICT_DEVMEM |
+ ACPI_CEDT_CFMWS_RESTRICT_VOLATILE,
+ .qtg_id = FAKE_QTG_ID,
+ .window_size = SZ_256M * 4,
+};
+
struct acpi_cedt_cfmws *mock_cfmws[] = {
[0] = &mock_cedt.cfmws0.cfmws,
[1] = &mock_cedt.cfmws1.cfmws,
@@ -471,6 +485,11 @@ static void cfmws_elc_update(struct acpi_cedt_cfmws *window, int index)
window->window_size = mock_auto_region_size * 2;
}

+static void update_type2_cfmws(void)
+{
+ memcpy(&mock_cedt.cfmws0.cfmws, &type2_cfmws0, sizeof(type2_cfmws0));
+}
+
static int populate_cedt(void)
{
struct cxl_mock_res *res;
@@ -492,10 +511,14 @@ static int populate_cedt(void)
chbs->length = size;
}

+ if (type2_test)
+ update_type2_cfmws();
+
for (i = cfmws_start; i <= cfmws_end; i++) {
struct acpi_cedt_cfmws *window = mock_cfmws[i];

- cfmws_elc_update(window, i);
+ if (i == 0 && !type2_test)
+ cfmws_elc_update(window, i);
res = alloc_mock_res(window->window_size, SZ_256M);
if (!res)
return -ENOMEM;
@@ -2029,6 +2052,8 @@ module_param(interleave_arithmetic, int, 0444);
MODULE_PARM_DESC(interleave_arithmetic, "Modulo:0, XOR:1");
module_param(extended_linear_cache, bool, 0444);
MODULE_PARM_DESC(extended_linear_cache, "Enable extended linear cache support");
+module_param(type2_test, bool, 0444);
+MODULE_PARM_DESC(type2_test, "Enable type 2 support testing");
module_init(cxl_test_init);
module_exit(cxl_test_exit);
MODULE_LICENSE("GPL v2");
--
2.53.0