diff options
| author | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2025-08-14 09:52:54 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-01-19 13:11:39 +0100 |
| commit | 3e482d5441002043bd2cdda33ad27ca93d828a48 (patch) | |
| tree | 0f61c92035af33c449c413f1dafe5adf1d3e6ccb /include/linux | |
| parent | c7978cb479e0a24c576266d61dbf21bd4f62ad45 (diff) | |
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 6a511a1078ca..724a5e3c122d 100644 --- a/include/linux/cper.h +++ b/include/linux/cper.h @@ -560,6 +560,8 @@ const char *cper_severity_str(unsigned int); const char *cper_mem_err_type_str(unsigned int); 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 *, |