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cxl/pmem: Add "Freeze Security State" security command support

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Create callback function to support the nvdimm_security_ops() ->freeze()
callback. Translate the operation to send "Freeze Security State" security
command for CXL memory device.

See CXL rev3.0 spec section 8.2.9.8.6.5 for reference.

Reviewed-by: Davidlohr Bueso <dave@stgolabs.net>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/166983613019.2734609.10645754779802492122.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dave Jiang 2022-11-30 12:22:10 -07:00 committed by Dan Williams
parent abf0c8380a
commit a072f7b797
4 changed files with 13 additions and 0 deletions
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1
drivers/cxl/core/mbox.c
View file

@ -68,6 +68,7 @@ static struct cxl_mem_command cxl_mem_commands[CXL_MEM_COMMAND_ID_MAX] = {
CXL_CMD(GET_SECURITY_STATE, 0, 0x4, 0),
CXL_CMD(SET_PASSPHRASE, 0x60, 0, 0),
CXL_CMD(DISABLE_PASSPHRASE, 0x40, 0, 0),
CXL_CMD(FREEZE_SECURITY, 0, 0, 0),
};
/*

1
drivers/cxl/cxlmem.h
View file

@ -276,6 +276,7 @@ enum cxl_opcode {
CXL_MBOX_OP_GET_SECURITY_STATE = 0x4500,
CXL_MBOX_OP_SET_PASSPHRASE = 0x4501,
CXL_MBOX_OP_DISABLE_PASSPHRASE = 0x4502,
CXL_MBOX_OP_FREEZE_SECURITY = 0x4504,
CXL_MBOX_OP_MAX = 0x10000
};

10
drivers/cxl/security.c
View file

@ -87,10 +87,20 @@ static int cxl_pmem_security_disable(struct nvdimm *nvdimm,
return rc;
}
static int cxl_pmem_security_freeze(struct nvdimm *nvdimm)
{
struct cxl_nvdimm *cxl_nvd = nvdimm_provider_data(nvdimm);
struct cxl_memdev *cxlmd = cxl_nvd->cxlmd;
struct cxl_dev_state *cxlds = cxlmd->cxlds;
return cxl_mbox_send_cmd(cxlds, CXL_MBOX_OP_FREEZE_SECURITY, NULL, 0, NULL, 0);
}
static const struct nvdimm_security_ops __cxl_security_ops = {
.get_flags = cxl_pmem_get_security_flags,
.change_key = cxl_pmem_security_change_key,
.disable = cxl_pmem_security_disable,
.freeze = cxl_pmem_security_freeze,
};
const struct nvdimm_security_ops *cxl_security_ops = &__cxl_security_ops;

1
include/uapi/linux/cxl_mem.h
View file

@ -44,6 +44,7 @@
___C(GET_SECURITY_STATE, "Get Security State"), \
___C(SET_PASSPHRASE, "Set Passphrase"), \
___C(DISABLE_PASSPHRASE, "Disable Passphrase"), \
___C(FREEZE_SECURITY, "Freeze Security"), \
___C(MAX, "invalid / last command")
#define ___C(a, b) CXL_MEM_COMMAND_ID_##a