50a466bf3e
Currently, the list of variables is populated by calling secvar_ops->get_next() repeatedly, which is explicitly modelled on the OPAL API (including the keylen parameter). For the upcoming PLPKS backend, we have a static list of variable names. It is messy to fit that into get_next(), so instead, let the backend put a NULL-terminated array of variable names into secvar_ops->var_names, which will be used if get_next() is undefined. Signed-off-by: Andrew Donnellan <ajd@linux.ibm.com> Signed-off-by: Russell Currey <ruscur@russell.cc> Reviewed-by: Stefan Berger <stefanb@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20230210080401.345462-12-ajd@linux.ibm.com
41 lines
994 B
C
41 lines
994 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2019 IBM Corporation
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* Author: Nayna Jain
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*
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* PowerPC secure variable operations.
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*/
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#ifndef SECVAR_OPS_H
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#define SECVAR_OPS_H
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#include <linux/types.h>
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#include <linux/errno.h>
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#include <linux/sysfs.h>
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extern const struct secvar_operations *secvar_ops;
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struct secvar_operations {
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int (*get)(const char *key, u64 key_len, u8 *data, u64 *data_size);
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int (*get_next)(const char *key, u64 *key_len, u64 keybufsize);
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int (*set)(const char *key, u64 key_len, u8 *data, u64 data_size);
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ssize_t (*format)(char *buf, size_t bufsize);
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int (*max_size)(u64 *max_size);
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const struct attribute **config_attrs;
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// NULL-terminated array of fixed variable names
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// Only used if get_next() isn't provided
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const char * const *var_names;
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};
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#ifdef CONFIG_PPC_SECURE_BOOT
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int set_secvar_ops(const struct secvar_operations *ops);
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#else
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static inline int set_secvar_ops(const struct secvar_operations *ops) { return 0; }
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#endif
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#endif
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