cxl/test: Standardize CXL auto region size

Create a global define for the size of the mock CXL auto region used
in cxl_test. Remove the declared size in mock_init_hdm_decoder()
function.

Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Tested-by: Alison Schofield <alison.schofield@intel.com>
Reviewed-by: Alison Schofield <alison.schofield@intel.com>
Reviewed-by: Fabio M. De Francesco <fabio.m.de.francesco@linux.intel.com>
Link: https://patch.msgid.link/20251117144611.903692-2-dave.jiang@intel.com
Signed-off-by: Dave Jiang <dave.jiang@intel.com>

diff --git a/tools/testing/cxl/test/cxl.c b/tools/testing/cxl/test/cxl.c
index 2d135ca533d02b871c3d0c808fec6f445beea03f..f0e73453608133e708df48ec48f532d5652a5f6a 100644 (file)
--- a/tools/testing/cxl/test/cxl.c
+++ b/tools/testing/cxl/test/cxl.c
@@ -26,6 +26,9 @@ static int interleave_arithmetic;
 #define NR_CXL_PORT_DECODERS 8
 #define NR_BRIDGES (NR_CXL_HOST_BRIDGES + NR_CXL_SINGLE_HOST + NR_CXL_RCH)
 
+#define MOCK_AUTO_REGION_SIZE_DEFAULT SZ_512M
+static int mock_auto_region_size = MOCK_AUTO_REGION_SIZE_DEFAULT;
+
 static struct platform_device *cxl_acpi;
 static struct platform_device *cxl_host_bridge[NR_CXL_HOST_BRIDGES];
 #define NR_MULTI_ROOT (NR_CXL_HOST_BRIDGES * NR_CXL_ROOT_PORTS)
@@ -738,7 +741,6 @@ static void mock_init_hdm_decoder(struct cxl_decoder *cxld)
        struct cxl_endpoint_decoder *cxled;
        struct cxl_switch_decoder *cxlsd;
        struct cxl_port *port, *iter;
-       const int size = SZ_512M;
        struct cxl_memdev *cxlmd;
        struct cxl_dport *dport;
        struct device *dev;
@@ -783,7 +785,7 @@ static void mock_init_hdm_decoder(struct cxl_decoder *cxld)
        base = window->base_hpa;
        cxld->hpa_range = (struct range) {
                .start = base,
-               .end = base + size - 1,
+               .end = base + mock_auto_region_size - 1,
        };
 
        cxld->interleave_ways = 2;
@@ -792,7 +794,8 @@ static void mock_init_hdm_decoder(struct cxl_decoder *cxld)
        cxld->flags = CXL_DECODER_F_ENABLE;
        cxled->state = CXL_DECODER_STATE_AUTO;
        port->commit_end = cxld->id;
-       devm_cxl_dpa_reserve(cxled, 0, size / cxld->interleave_ways, 0);
+       devm_cxl_dpa_reserve(cxled, 0,
+                            mock_auto_region_size / cxld->interleave_ways, 0);
        cxld->commit = mock_decoder_commit;
        cxld->reset = mock_decoder_reset;
 
@@ -841,7 +844,7 @@ static void mock_init_hdm_decoder(struct cxl_decoder *cxld)
                cxld->interleave_granularity = 4096;
                cxld->hpa_range = (struct range) {
                        .start = base,
-                       .end = base + size - 1,
+                       .end = base + mock_auto_region_size - 1,
                };
                put_device(dev);
        }