1 /* SPDX-License-Identifier: GPL-2.0-only */
2
3 #ifndef _CBFS_GLUE_H_
4 #define _CBFS_GLUE_H_
5
6 #include <commonlib/region.h>
7 #include <console/console.h>
8 #include <security/vboot/misc.h>
9
10 /*
11 * This flag prevents linking hashing functions into stages where they're not required. We don't
12 * need them at all if verification is disabled. If verification is enabled without TOCTOU
13 * safety, we only need to verify the metadata hash in the initial stage and can assume it stays
14 * valid in later stages. If TOCTOU safety is required, we may need them in every stage to
15 * reverify metadata that had to be reloaded from flash (e.g. because it didn't fit the mcache).
16 * Moreover, if VBOOT_CBFS_INTEGRATION and verification are both enabled, then hashing functions
17 * are required during verification stage.
18 * Note that this only concerns metadata hashing -- file access functions may still link hashing
19 * routines independently for file data hashing.
20 */
21 #define CBFS_ENABLE_HASHING (CONFIG(CBFS_VERIFICATION) && \
22 (CONFIG(TOCTOU_SAFETY) || ENV_INITIAL_STAGE || \
23 (CONFIG(VBOOT_CBFS_INTEGRATION) && \
24 (verification_should_run() || \
25 (verstage_should_load() && \
26 CONFIG(VBOOT_RETURN_FROM_VERSTAGE))))))
27 #define CBFS_HASH_HWCRYPTO vboot_hwcrypto_allowed()
28
29 #define ERROR(...) printk(BIOS_ERR, "CBFS ERROR: " __VA_ARGS__)
30 #define LOG(...) printk(BIOS_INFO, "CBFS: " __VA_ARGS__)
31 #define DEBUG(...) do { \
32 if (CONFIG(DEBUG_CBFS)) \
33 printk(BIOS_SPEW, "CBFS DEBUG: " __VA_ARGS__); \
34 } while (0)
35
36 typedef const struct region_device *cbfs_dev_t;
37
cbfs_dev_read(cbfs_dev_t dev,void * buffer,size_t offset,size_t size)38 static inline ssize_t cbfs_dev_read(cbfs_dev_t dev, void *buffer, size_t offset, size_t size)
39 {
40 return rdev_readat(dev, buffer, offset, size);
41 }
42
cbfs_dev_size(cbfs_dev_t dev)43 static inline size_t cbfs_dev_size(cbfs_dev_t dev)
44 {
45 return region_device_sz(dev);
46 }
47
48 #endif /* _CBFS_GLUE_H_ */
49