diff options
| author | Russell Currey <ruscur@russell.cc> | 2023-02-10 11:03:42 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2023-02-12 14:12:37 +0300 |
| commit | ec2f40bd004b4b9142469282d4a6ce9afa22f9c0 (patch) | |
| tree | 7d36e3f86fab7c414a52d32e6aee2e88145ac570 /arch/powerpc/platforms/powernv | |
| parent | 16943a2faf94ef671e60c7577511c0d119fbdfc8 (diff) | |
| download | linux-ec2f40bd004b4b9142469282d4a6ce9afa22f9c0.tar.xz | |
powerpc/secvar: Handle format string in the consumer
The code that handles the format string in secvar-sysfs.c is entirely
OPAL specific, so create a new "format" op in secvar_operations to make
the secvar code more generic. No functional change.
Signed-off-by: Russell Currey <ruscur@russell.cc>
Signed-off-by: Andrew Donnellan <ajd@linux.ibm.com>
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20230210080401.345462-8-ajd@linux.ibm.com
Diffstat (limited to 'arch/powerpc/platforms/powernv')
| -rw-r--r-- | arch/powerpc/platforms/powernv/opal-secvar.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/powernv/opal-secvar.c b/arch/powerpc/platforms/powernv/opal-secvar.c index 4c0a3b030fe0..e33bb703ecbc 100644 --- a/arch/powerpc/platforms/powernv/opal-secvar.c +++ b/arch/powerpc/platforms/powernv/opal-secvar.c @@ -98,10 +98,35 @@ static int opal_set_variable(const char *key, u64 ksize, u8 *data, u64 dsize) return opal_status_to_err(rc); } +static ssize_t opal_secvar_format(char *buf, size_t bufsize) +{ + ssize_t rc = 0; + struct device_node *node; + const char *format; + + node = of_find_compatible_node(NULL, NULL, "ibm,secvar-backend"); + if (!of_device_is_available(node)) { + rc = -ENODEV; + goto out; + } + + rc = of_property_read_string(node, "format", &format); + if (rc) + goto out; + + rc = snprintf(buf, bufsize, "%s", format); + +out: + of_node_put(node); + + return rc; +} + static const struct secvar_operations opal_secvar_ops = { .get = opal_get_variable, .get_next = opal_get_next_variable, .set = opal_set_variable, + .format = opal_secvar_format, }; static int opal_secvar_probe(struct platform_device *pdev) |