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authorNayna Jain <nayna@linux.ibm.com>2019-11-11 06:10:33 +0300
committerMichael Ellerman <mpe@ellerman.id.au>2019-11-12 16:33:22 +0300
commit9155e2341aa8b5df057dc1c77633b33d1a4f17d2 (patch)
tree294435e811fa6529203d26b553e4c50fd12dc41a /arch/powerpc/platforms/powernv/opal.c
parent39a963b457b5c6cbbdc70441c9d496e39d151582 (diff)
downloadlinux-9155e2341aa8b5df057dc1c77633b33d1a4f17d2.tar.xz
powerpc/powernv: Add OPAL API interface to access secure variable
The X.509 certificates trusted by the platform and required to secure boot the OS kernel are wrapped in secure variables, which are controlled by OPAL. This patch adds firmware/kernel interface to read and write OPAL secure variables based on the unique key. This support can be enabled using CONFIG_OPAL_SECVAR. Signed-off-by: Claudio Carvalho <cclaudio@linux.ibm.com> Signed-off-by: Nayna Jain <nayna@linux.ibm.com> Signed-off-by: Eric Richter <erichte@linux.ibm.com> [mpe: Make secvar_ops __ro_after_init, only build opal-secvar.c if PPC_SECURE_BOOT=y] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/1573441836-3632-2-git-send-email-nayna@linux.ibm.com
Diffstat (limited to 'arch/powerpc/platforms/powernv/opal.c')
-rw-r--r--arch/powerpc/platforms/powernv/opal.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/powernv/opal.c b/arch/powerpc/platforms/powernv/opal.c
index 38e90270280b..8355bcd00f93 100644
--- a/arch/powerpc/platforms/powernv/opal.c
+++ b/arch/powerpc/platforms/powernv/opal.c
@@ -1002,6 +1002,9 @@ static int __init opal_init(void)
/* Initialise OPAL Power control interface */
opal_power_control_init();
+ /* Initialize OPAL secure variables */
+ opal_pdev_init("ibm,secvar-backend");
+
return 0;
}
machine_subsys_initcall(powernv, opal_init);