70 lines
2.0 KiB
C
70 lines
2.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef __TSM_H
|
|
#define __TSM_H
|
|
|
|
#include <linux/sizes.h>
|
|
#include <linux/types.h>
|
|
|
|
#define TSM_INBLOB_MAX 64
|
|
#define TSM_OUTBLOB_MAX SZ_32K
|
|
|
|
/*
|
|
* Privilege level is a nested permission concept to allow confidential
|
|
* guests to partition address space, 4-levels are supported.
|
|
*/
|
|
#define TSM_PRIVLEVEL_MAX 3
|
|
|
|
/**
|
|
* struct tsm_desc - option descriptor for generating tsm report blobs
|
|
* @privlevel: optional privilege level to associate with @outblob
|
|
* @inblob_len: sizeof @inblob
|
|
* @inblob: arbitrary input data
|
|
*/
|
|
struct tsm_desc {
|
|
unsigned int privlevel;
|
|
size_t inblob_len;
|
|
u8 inblob[TSM_INBLOB_MAX];
|
|
};
|
|
|
|
/**
|
|
* struct tsm_report - track state of report generation relative to options
|
|
* @desc: input parameters to @report_new()
|
|
* @outblob_len: sizeof(@outblob)
|
|
* @outblob: generated evidence to provider to the attestation agent
|
|
* @auxblob_len: sizeof(@auxblob)
|
|
* @auxblob: (optional) auxiliary data to the report (e.g. certificate data)
|
|
*/
|
|
struct tsm_report {
|
|
struct tsm_desc desc;
|
|
size_t outblob_len;
|
|
u8 *outblob;
|
|
size_t auxblob_len;
|
|
u8 *auxblob;
|
|
};
|
|
|
|
/**
|
|
* struct tsm_ops - attributes and operations for tsm instances
|
|
* @name: tsm id reflected in /sys/kernel/config/tsm/report/$report/provider
|
|
* @privlevel_floor: convey base privlevel for nested scenarios
|
|
* @report_new: Populate @report with the report blob and auxblob
|
|
* (optional), return 0 on successful population, or -errno otherwise
|
|
*
|
|
* Implementation specific ops, only one is expected to be registered at
|
|
* a time i.e. only one of "sev-guest", "tdx-guest", etc.
|
|
*/
|
|
struct tsm_ops {
|
|
const char *name;
|
|
const unsigned int privlevel_floor;
|
|
int (*report_new)(struct tsm_report *report, void *data);
|
|
};
|
|
|
|
extern const struct config_item_type tsm_report_default_type;
|
|
|
|
/* publish @privlevel, @privlevel_floor, and @auxblob attributes */
|
|
extern const struct config_item_type tsm_report_extra_type;
|
|
|
|
int tsm_register(const struct tsm_ops *ops, void *priv,
|
|
const struct config_item_type *type);
|
|
int tsm_unregister(const struct tsm_ops *ops);
|
|
#endif /* __TSM_H */
|