[RFC,14/15] tools/testing/cxl: Add "passphrase secure erase" opcode support

Commit Message

Dave Jiang July 15, 2022, 9:09 p.m. UTC

Add support to emulate a CXL mem device support the "passphrase secure
erase" operation.

Signed-off-by: Dave Jiang <[e-mail]>
---
 tools/testing/cxl/test/mem.c |   59 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 59 insertions(+)

Patch

diff --git a/tools/testing/cxl/test/mem.c b/tools/testing/cxl/test/mem.c
index 55a83896ccb8..ebc5e8768019 100644
--- a/tools/testing/cxl/test/mem.c
+++ b/tools/testing/cxl/test/mem.c
@@ -386,6 +386,62 @@  static int mock_unlock_security(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd
 	return 0;
 }
 
+static int mock_passphrase_erase(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd)
+{
+	struct mock_mdev_data *mdata = dev_get_drvdata(cxlds->dev);
+	struct cxl_pass_erase *erase;
+
+	if (cmd->size_in != sizeof(*erase)) {
+		cmd->return_code = CXL_MBOX_CMD_RC_INPUT;
+		return -EINVAL;
+	}
+
+	if (cmd->size_out != 0) {
+		cmd->return_code = CXL_MBOX_CMD_RC_INPUT;
+		return -EINVAL;
+	}
+
+	if (mdata->security_state & CXL_PMEM_SEC_STATE_FROZEN) {
+		cmd->return_code = CXL_MBOX_CMD_RC_SECURITY;
+		return -ENXIO;
+	}
+
+	if (mdata->security_state & CXL_PMEM_SEC_STATE_USER_PLIMIT) {
+		cmd->return_code = CXL_MBOX_CMD_RC_SECURITY;
+		return -ENXIO;
+	}
+
+	if (erase->type == CXL_PMEM_SEC_PASS_MASTER &&
+	    mdata->security_state & CXL_PMEM_SEC_STATE_MASTER_PASS_SET &&
+	    memcmp(mdata->master_pass, erase->pass, NVDIMM_PASSPHRASE_LEN)) {
+		if (++mdata->master_limit == PASS_TRY_LIMIT)
+			mdata->security_state |= CXL_PMEM_SEC_STATE_MASTER_PLIMIT;
+		cmd->return_code = CXL_MBOX_CMD_RC_PASSPHRASE;
+		return -ENXIO;
+	}
+
+	if (erase->type == CXL_PMEM_SEC_PASS_USER &&
+	    mdata->security_state & CXL_PMEM_SEC_STATE_USER_PASS_SET &&
+	    memcmp(mdata->user_pass, erase->pass, NVDIMM_PASSPHRASE_LEN)) {
+		if (++mdata->user_limit == PASS_TRY_LIMIT)
+			mdata->security_state |= CXL_PMEM_SEC_STATE_USER_PLIMIT;
+		cmd->return_code = CXL_MBOX_CMD_RC_PASSPHRASE;
+		return -ENXIO;
+	}
+
+	if (erase->type == CXL_PMEM_SEC_PASS_USER) {
+		mdata->security_state &= ~CXL_PMEM_SEC_STATE_USER_PASS_SET;
+		mdata->user_limit = 0;
+		memset(mdata->user_pass, 0, NVDIMM_PASSPHRASE_LEN);
+	} else if (erase->type == CXL_PMEM_SEC_PASS_MASTER) {
+		mdata->master_limit = 0;
+	}
+
+	mdata->security_state &= ~CXL_PMEM_SEC_STATE_LOCKED;
+
+	return 0;
+}
+
 static int mock_get_lsa(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd)
 {
 	struct cxl_mbox_get_lsa *get_lsa = cmd->payload_in;
@@ -493,6 +549,9 @@  static int cxl_mock_mbox_send(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *
 	case CXL_MBOX_OP_UNLOCK:
 		rc = mock_unlock_security(cxlds, cmd);
 		break;
+	case CXL_MBOX_OP_PASSPHRASE_ERASE:
+		rc = mock_passphrase_erase(cxlds, cmd);
+		break;
 	default:
 		break;
 	}