From b5807c80b5bc49764724ca22e83c04f527e86fd4 Mon Sep 17 00:00:00 2001 From: Dave Jiang Date: Thu, 1 Dec 2022 14:03:19 -0800 Subject: [PATCH] cxl: add dimm_id support for __nvdimm_create() Set the cxlds->serial as the dimm_id to be fed to __nvdimm_create(). The security code uses that as the key description for the security key of the memory device. The nvdimm unlock code cannot find the respective key without the dimm_id. Reviewed-by: Jonathan Cameron Signed-off-by: Dave Jiang Link: https://lore.kernel.org/r/166863357043.80269.4337575149671383294.stgit@djiang5-desk3.ch.intel.com Link: https://lore.kernel.org/r/166983620459.2734609.10175456773200251184.stgit@djiang5-desk3.ch.intel.com Link: https://lore.kernel.org/r/166993219918.1995348.10786511454826454601.stgit@dwillia2-xfh.jf.intel.com Signed-off-by: Dan Williams --- drivers/cxl/core/pmem.c | 7 +++++++ drivers/cxl/cxl.h | 3 +++ drivers/cxl/pmem.c | 3 ++- 3 files changed, 12 insertions(+), 1 deletion(-) diff --git a/drivers/cxl/core/pmem.c b/drivers/cxl/core/pmem.c index 36aa5070d9024..7b9a9573e6f22 100644 --- a/drivers/cxl/core/pmem.c +++ b/drivers/cxl/core/pmem.c @@ -238,6 +238,13 @@ static struct cxl_nvdimm *cxl_nvdimm_alloc(struct cxl_memdev *cxlmd) dev->parent = &cxlmd->dev; dev->bus = &cxl_bus_type; dev->type = &cxl_nvdimm_type; + /* + * A "%llx" string is 17-bytes vs dimm_id that is max + * NVDIMM_KEY_DESC_LEN + */ + BUILD_BUG_ON(sizeof(cxl_nvd->dev_id) < 17 || + sizeof(cxl_nvd->dev_id) > NVDIMM_KEY_DESC_LEN); + sprintf(cxl_nvd->dev_id, "%llx", cxlmd->cxlds->serial); return cxl_nvd; } diff --git a/drivers/cxl/cxl.h b/drivers/cxl/cxl.h index 7d07127eade3c..b433e541a0542 100644 --- a/drivers/cxl/cxl.h +++ b/drivers/cxl/cxl.h @@ -420,11 +420,14 @@ struct cxl_nvdimm_bridge { enum cxl_nvdimm_brige_state state; }; +#define CXL_DEV_ID_LEN 19 + struct cxl_nvdimm { struct device dev; struct cxl_memdev *cxlmd; struct cxl_nvdimm_bridge *bridge; struct xarray pmem_regions; + u8 dev_id[CXL_DEV_ID_LEN]; /* for nvdimm, string of 'serial' */ }; struct cxl_pmem_region_mapping { diff --git a/drivers/cxl/pmem.c b/drivers/cxl/pmem.c index 403e41bcbf2bf..ab40c93c44e50 100644 --- a/drivers/cxl/pmem.c +++ b/drivers/cxl/pmem.c @@ -117,7 +117,8 @@ static int cxl_nvdimm_probe(struct device *dev) set_bit(ND_CMD_SET_CONFIG_DATA, &cmd_mask); nvdimm = __nvdimm_create(cxl_nvb->nvdimm_bus, cxl_nvd, cxl_dimm_attribute_groups, flags, - cmd_mask, 0, NULL, NULL, cxl_security_ops, NULL); + cmd_mask, 0, NULL, cxl_nvd->dev_id, + cxl_security_ops, NULL); if (!nvdimm) { rc = -ENOMEM; goto out; -- 2.30.2