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| author | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2025-08-14 19:52:54 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-12-18 16:03:41 +0300 |
| commit | a980fec3d5eba63a9b40f2ae3a7807ffc447cd6a (patch) | |
| tree | 47846cc7ea6ae1362b57a15222d040d8a8ba898f /include/linux | |
| parent | 67d5a5e20259414b5ad6ba8bdf1aff8e80ca9c49 (diff) | |
| download | linux-a980fec3d5eba63a9b40f2ae3a7807ffc447cd6a.tar.xz | |
efi/cper: Add a new helper function to print bitmasks
[ Upstream commit a976d790f49499ccaa0f991788ad8ebf92e7fd5c ]
Add a helper function to print a string with names associated
to each bit field.
A typical example is:
const char * const bits[] = {
"bit 3 name",
"bit 4 name",
"bit 5 name",
};
char str[120];
unsigned int bitmask = BIT(3) | BIT(5);
#define MASK GENMASK(5,3)
cper_bits_to_str(str, sizeof(str), FIELD_GET(MASK, bitmask),
bits, ARRAY_SIZE(bits));
The above code fills string "str" with "bit 3 name|bit 5 name".
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Acked-by: Borislav Petkov (AMD) <bp@alien8.de>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/cper.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/cper.h b/include/linux/cper.h index 0ed60a91eca9..58f40477c824 100644 --- a/include/linux/cper.h +++ b/include/linux/cper.h @@ -588,6 +588,8 @@ const char *cper_mem_err_type_str(unsigned int); const char *cper_mem_err_status_str(u64 status); void cper_print_bits(const char *prefix, unsigned int bits, const char * const strs[], unsigned int strs_size); +int cper_bits_to_str(char *buf, int buf_size, unsigned long bits, + const char * const strs[], unsigned int strs_size); void cper_mem_err_pack(const struct cper_sec_mem_err *, struct cper_mem_err_compact *); const char *cper_mem_err_unpack(struct trace_seq *, |