This is a note to let you know that I've just added the patch titled
powerpc/pseries: Add helper to get PLPKS password length
to the 6.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
powerpc-pseries-add-helper-to-get-plpks-password-len.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 3a563ec250c7083aa7b51b249fc64642bde1d0d9
Author: Russell Currey <ruscur@xxxxxxxxxx>
Date: Fri Feb 10 19:03:57 2023 +1100
powerpc/pseries: Add helper to get PLPKS password length
[ Upstream commit 9ee76bd5c7e39b622660cc14833ead1967f2038d ]
Add helper function to get the PLPKS password length. This will be used
in a later patch to support passing the password between kernels over
kexec.
Signed-off-by: Russell Currey <ruscur@xxxxxxxxxx>
Signed-off-by: Andrew Donnellan <ajd@xxxxxxxxxxxxx>
Reviewed-by: Stefan Berger <stefanb@xxxxxxxxxxxxx>
Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20230210080401.345462-23-ajd@xxxxxxxxxxxxx
Stable-dep-of: 932bed412170 ("powerpc/kexec_file: fix cpus node update to FDT")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/arch/powerpc/include/asm/plpks.h b/arch/powerpc/include/asm/plpks.h
index 8dab5c26c1e41..9e2219b0202db 100644
--- a/arch/powerpc/include/asm/plpks.h
+++ b/arch/powerpc/include/asm/plpks.h
@@ -153,6 +153,11 @@ u32 plpks_get_maxlargeobjectsize(void);
*/
u64 plpks_get_signedupdatealgorithms(void);
+/**
+ * Returns the length of the PLPKS password in bytes.
+ */
+u16 plpks_get_passwordlen(void);
+
#endif // CONFIG_PSERIES_PLPKS
#endif // _ASM_POWERPC_PLPKS_H
diff --git a/arch/powerpc/platforms/pseries/plpks.c b/arch/powerpc/platforms/pseries/plpks.c
index 2b659f2b01214..eea251105e394 100644
--- a/arch/powerpc/platforms/pseries/plpks.c
+++ b/arch/powerpc/platforms/pseries/plpks.c
@@ -348,6 +348,11 @@ u64 plpks_get_signedupdatealgorithms(void)
return signedupdatealgorithms;
}
+u16 plpks_get_passwordlen(void)
+{
+ return ospasswordlength;
+}
+
bool plpks_is_available(void)
{
int rc;
