1 // SPDX-License-Identifier: GPL-2.0-only
90 	var.name = kcalloc(key_len - 1, sizeof(wchar_t), GFP_KERNEL);  in plpks_get_variable()
92 		return -ENOMEM;  in plpks_get_variable()
93 	rc = utf8s_to_utf16s(key, key_len - 1, UTF16_LITTLE_ENDIAN, (wchar_t *)var.name,  in plpks_get_variable()
94 			     key_len - 1);  in plpks_get_variable()
113 	if (rc && rc != -ENOENT) {  in plpks_get_variable()
115 		// Return -EIO since userspace probably doesn't care about the  in plpks_get_variable()
117 		rc = -EIO;  in plpks_get_variable()
132 		return -EINVAL;  in plpks_set_variable()
136 	var.name = kcalloc(key_len - 1, sizeof(wchar_t), GFP_KERNEL);  in plpks_set_variable()
138 		return -ENOMEM;  in plpks_set_variable()
139 	rc = utf8s_to_utf16s(key, key_len - 1, UTF16_LITTLE_ENDIAN, (wchar_t *)var.name,  in plpks_set_variable()
140 			     key_len - 1);  in plpks_set_variable()
145 	// Flags are contained in the first 8 bytes of the buffer, and are always big-endian  in plpks_set_variable()
148 	var.datalen = data_size - sizeof(flags);  in plpks_set_variable()
154 	// userspace on write, so we return it rather than just -EIO  in plpks_set_variable()
163  * Return the key management mode.
167  * indicates that the key management mode is dynamic. Any failure in
168  * reading SB_VERSION defaults the key management mode to static. The error
169  * codes -ENOENT or -EPERM are expected in static key management mode. An
173  * Return 0 to indicate that the key management mode is static. Otherwise
174  * return the SB_VERSION value to indicate that the key management mode is
175  * dynamic.
179 	u8 mode;  in plpks_get_sb_keymgmt_mode()  local
186 		.data = &mode,  in plpks_get_sb_keymgmt_mode()
191 		if (rc != -ENOENT && rc != -EPERM)  in plpks_get_sb_keymgmt_mode()
193 		mode = 0;  in plpks_get_sb_keymgmt_mode()
195 	return mode;  in plpks_get_sb_keymgmt_mode()
199  * PLPKS dynamic secure boot doesn't give us a format string in the same way
202  * "ibm,plpks-sb-v<n>" or "ibm,plpks-sb-v0", based on the key management mode,
207 	u8 mode;  in plpks_secvar_format()  local
209 	mode = plpks_get_sb_keymgmt_mode();  in plpks_secvar_format()
210 	return snprintf(buf, bufsize, "ibm,plpks-sb-v%hhu", mode);  in plpks_secvar_format()
243 	u8 mode;  in plpks_secvar_init()  local
246 		return -ENODEV;  in plpks_secvar_init()
248 	mode = plpks_get_sb_keymgmt_mode();  in plpks_secvar_init()
249 	if (mode)  in plpks_secvar_init()