diff options
| author | Dan Williams <dan.j.williams@intel.com> | 2021-09-08 22:13:21 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2021-09-21 14:09:34 -0700 |
| commit | 7d3eb23c4ccf457b52cafdca1a7b20cddf29e021 (patch) | |
| tree | fe3deb591d4ad3dbac2e44e2d0cc376384354f95 /drivers/cxl/core | |
| parent | 49be6dd807511db31809000a7b9d430b18d5e780 (diff) | |
| download | lwn-7d3eb23c4ccf457b52cafdca1a7b20cddf29e021.tar.gz lwn-7d3eb23c4ccf457b52cafdca1a7b20cddf29e021.zip | |
tools/testing/cxl: Introduce a mock memory device + driver
Introduce an emulated device-set plus driver to register CXL memory
devices, 'struct cxl_memdev' instances, in the mock cxl_test topology.
This enables the development of HDM Decoder (Host-managed Device Memory
Decoder) programming flow (region provisioning) in an environment that
can be updated alongside the kernel as it gains more functionality.
Whereas the cxl_pci module looks for CXL memory expanders on the 'pci'
bus, the cxl_mock_mem module attaches to CXL expanders on the platform
bus emitted by cxl_test.
Acked-by: Ben Widawsky <ben.widawsky@intel.com>
Reported-by: kernel test robot <lkp@intel.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/163116440099.2460985.10692549614409346604.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/cxl/core')
| -rw-r--r-- | drivers/cxl/core/pmem.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/cxl/core/pmem.c b/drivers/cxl/core/pmem.c index 9e56be3994f1..74be5132df1c 100644 --- a/drivers/cxl/core/pmem.c +++ b/drivers/cxl/core/pmem.c @@ -51,16 +51,16 @@ struct cxl_nvdimm_bridge *to_cxl_nvdimm_bridge(struct device *dev) } EXPORT_SYMBOL_GPL(to_cxl_nvdimm_bridge); -static int match_nvdimm_bridge(struct device *dev, const void *data) +__mock int match_nvdimm_bridge(struct device *dev, const void *data) { return dev->type == &cxl_nvdimm_bridge_type; } -struct cxl_nvdimm_bridge *cxl_find_nvdimm_bridge(void) +struct cxl_nvdimm_bridge *cxl_find_nvdimm_bridge(struct cxl_nvdimm *cxl_nvd) { struct device *dev; - dev = bus_find_device(&cxl_bus_type, NULL, NULL, match_nvdimm_bridge); + dev = bus_find_device(&cxl_bus_type, NULL, cxl_nvd, match_nvdimm_bridge); if (!dev) return NULL; return to_cxl_nvdimm_bridge(dev); |