/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __TSM_H
#define __TSM_H
#include <linux/sizes.h>
#include <linux/types.h>
#include <linux/uuid.h>
#define TSM_REPORT_INBLOB_MAX 64
#define TSM_REPORT_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_REPORT_PRIVLEVEL_MAX 3
/**
* struct tsm_report_desc - option descriptor for generating tsm report blobs
* @ privlevel : optional privilege level to associate with @ outblob
* @ inblob_len : sizeof @ inblob
* @ inblob : arbitrary input data
* @ service_provider : optional name of where to obtain the tsm report blob
* @ service_guid : optional service - provider service guid to attest
* @ service_manifest_version : optional service - provider service manifest version requested
*/
struct tsm_report_desc {
unsigned int privlevel;
size_t inblob_len;
u8 inblob[TSM_REPORT_INBLOB_MAX];
char *service_provider;
guid_t service_guid;
unsigned int service_manifest_version;
};
/**
* 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 )
* @ manifestblob_len : sizeof ( @ manifestblob )
* @ manifestblob : ( optional ) manifest data associated with the report
*/
struct tsm_report {
struct tsm_report_desc desc;
size_t outblob_len;
u8 *outblob;
size_t auxblob_len;
u8 *auxblob;
size_t manifestblob_len;
u8 *manifestblob;
};
/**
* enum tsm_attr_index - index used to reference report attributes
* @ TSM_REPORT_GENERATION : index of the report generation number attribute
* @ TSM_REPORT_PROVIDER : index of the provider name attribute
* @ TSM_REPORT_PRIVLEVEL : index of the desired privilege level attribute
* @ TSM_REPORT_PRIVLEVEL_FLOOR : index of the minimum allowed privileg level attribute
* @ TSM_REPORT_SERVICE_PROVIDER : index of the service provider identifier attribute
* @ TSM_REPORT_SERVICE_GUID : index of the service GUID attribute
* @ TSM_REPORT_SERVICE_MANIFEST_VER : index of the service manifest version attribute
*/
enum tsm_attr_index {
TSM_REPORT_GENERATION,
TSM_REPORT_PROVIDER,
TSM_REPORT_PRIVLEVEL,
TSM_REPORT_PRIVLEVEL_FLOOR,
TSM_REPORT_SERVICE_PROVIDER,
TSM_REPORT_SERVICE_GUID,
TSM_REPORT_SERVICE_MANIFEST_VER,
};
/**
* enum tsm_bin_attr_index - index used to reference binary report attributes
* @ TSM_REPORT_INBLOB : index of the binary report input attribute
* @ TSM_REPORT_OUTBLOB : index of the binary report output attribute
* @ TSM_REPORT_AUXBLOB : index of the binary auxiliary data attribute
* @ TSM_REPORT_MANIFESTBLOB : index of the binary manifest data attribute
*/
enum tsm_bin_attr_index {
TSM_REPORT_INBLOB,
TSM_REPORT_OUTBLOB,
TSM_REPORT_AUXBLOB,
TSM_REPORT_MANIFESTBLOB,
};
/**
* struct tsm_report_ops - attributes and operations for tsm_report 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
* @ report_attr_visible : show or hide a report attribute entry
* @ report_bin_attr_visible : show or hide a report binary attribute entry
*
* 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_report_ops {
const char *name;
unsigned int privlevel_floor;
int (*report_new)(struct tsm_report *report, void *data);
bool (*report_attr_visible)(int n);
bool (*report_bin_attr_visible)(int n);
};
int tsm_report_register(const struct tsm_report_ops *ops, void *priv);
int tsm_report_unregister(const struct tsm_report_ops *ops);
#endif /* __TSM_H */
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