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| author |  Russell Currey <ruscur@russell.cc>
| 2023-02-10 19:03:43 +1100 |
|---|---|---|
| committer |  Michael Ellerman <mpe@ellerman.id.au>
| 2023-02-12 22:12:37 +1100 |
| commit | e02407944052554c1685e11e56175147d1ac56b6 (patch) | |
| tree | 6f3e3174d40b446a197687c1eb92792bfa01a43d /arch/powerpc/platforms | |
| parent | powerpc/secvar: Handle format string in the consumer (diff) | |
| download | linux-e02407944052554c1685e11e56175147d1ac56b6.tar.gz linux-e02407944052554c1685e11e56175147d1ac56b6.tar.bz2 linux-e02407944052554c1685e11e56175147d1ac56b6.zip | |
powerpc/secvar: Handle max object size in the consumer
Currently the max object size is handled in the core secvar code with an
entirely OPAL-specific implementation, so create a new max_size() op and
move the existing implementation into the powernv platform. Should be
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/20230210080401.345462-9-ajd@linux.ibm.com
Diffstat (limited to 'arch/powerpc/platforms')
| -rw-r--r-- | arch/powerpc/platforms/powernv/opal-secvar.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/powernv/opal-secvar.c b/arch/powerpc/platforms/powernv/opal-secvar.c index e33bb703ecbc..a8436bf35e2f 100644 --- a/arch/powerpc/platforms/powernv/opal-secvar.c +++ b/arch/powerpc/platforms/powernv/opal-secvar.c @@ -122,11 +122,33 @@ out: return rc; } +static int opal_secvar_max_size(u64 *max_size) +{ + int rc; + struct device_node *node; + + node = of_find_compatible_node(NULL, NULL, "ibm,secvar-backend"); + if (!node) + return -ENODEV; + + if (!of_device_is_available(node)) { + rc = -ENODEV; + goto out; + } + + rc = of_property_read_u64(node, "max-var-size", max_size); + +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, + .max_size = opal_secvar_max_size, }; static int opal_secvar_probe(struct platform_device *pdev) |