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cxl/pmem: Add "Freeze Security State" security command support
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>
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@ -68,6 +68,7 @@ static struct cxl_mem_command cxl_mem_commands[CXL_MEM_COMMAND_ID_MAX] = {
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CXL_CMD(GET_SECURITY_STATE, 0, 0x4, 0),
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CXL_CMD(SET_PASSPHRASE, 0x60, 0, 0),
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CXL_CMD(DISABLE_PASSPHRASE, 0x40, 0, 0),
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CXL_CMD(FREEZE_SECURITY, 0, 0, 0),
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};
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/*
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@ -276,6 +276,7 @@ enum cxl_opcode {
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CXL_MBOX_OP_GET_SECURITY_STATE = 0x4500,
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CXL_MBOX_OP_SET_PASSPHRASE = 0x4501,
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CXL_MBOX_OP_DISABLE_PASSPHRASE = 0x4502,
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CXL_MBOX_OP_FREEZE_SECURITY = 0x4504,
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CXL_MBOX_OP_MAX = 0x10000
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};
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@ -87,10 +87,20 @@ static int cxl_pmem_security_disable(struct nvdimm *nvdimm,
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return rc;
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}
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static int cxl_pmem_security_freeze(struct nvdimm *nvdimm)
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{
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struct cxl_nvdimm *cxl_nvd = nvdimm_provider_data(nvdimm);
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struct cxl_memdev *cxlmd = cxl_nvd->cxlmd;
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struct cxl_dev_state *cxlds = cxlmd->cxlds;
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return cxl_mbox_send_cmd(cxlds, CXL_MBOX_OP_FREEZE_SECURITY, NULL, 0, NULL, 0);
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}
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static const struct nvdimm_security_ops __cxl_security_ops = {
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.get_flags = cxl_pmem_get_security_flags,
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.change_key = cxl_pmem_security_change_key,
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.disable = cxl_pmem_security_disable,
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.freeze = cxl_pmem_security_freeze,
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};
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const struct nvdimm_security_ops *cxl_security_ops = &__cxl_security_ops;
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@ -44,6 +44,7 @@
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___C(GET_SECURITY_STATE, "Get Security State"), \
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___C(SET_PASSPHRASE, "Set Passphrase"), \
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___C(DISABLE_PASSPHRASE, "Disable Passphrase"), \
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___C(FREEZE_SECURITY, "Freeze Security"), \
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___C(MAX, "invalid / last command")
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#define ___C(a, b) CXL_MEM_COMMAND_ID_##a
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