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Subject[PATCH] powerpc/pseries: detect secure and trusted boot state of the system.
Date
The device-tree property to check secure and trusted boot state is
different for guests(pseries) compared to baremetal(powernv).

This patch updates the existing is_ppc_secureboot_enabled() and
is_ppc_trustedboot_enabled() function to add support for pseries.

Signed-off-by: Nayna Jain <nayna@linux.ibm.com>
---
arch/powerpc/kernel/secure_boot.c | 31 +++++++++++++++++++++++++------
1 file changed, 25 insertions(+), 6 deletions(-)

diff --git a/arch/powerpc/kernel/secure_boot.c b/arch/powerpc/kernel/secure_boot.c
index 4b982324d368..43fc6607c7a5 100644
--- a/arch/powerpc/kernel/secure_boot.c
+++ b/arch/powerpc/kernel/secure_boot.c
@@ -6,6 +6,7 @@
#include <linux/types.h>
#include <linux/of.h>
#include <asm/secure_boot.h>
+#include <asm/machdep.h>

static struct device_node *get_ppc_fw_sb_node(void)
{
@@ -23,11 +24,20 @@ bool is_ppc_secureboot_enabled(void)
{
struct device_node *node;
bool enabled = false;
+ const u32 *secureboot;

- node = get_ppc_fw_sb_node();
- enabled = of_property_read_bool(node, "os-secureboot-enforcing");
+ if (machine_is(powernv)) {
+ node = get_ppc_fw_sb_node();
+ enabled =
+ of_property_read_bool(node, "os-secureboot-enforcing");
+ of_node_put(node);
+ }

- of_node_put(node);
+ if (machine_is(pseries)) {
+ secureboot = of_get_property(of_root, "ibm,secure-boot", NULL);
+ if (secureboot)
+ enabled = (*secureboot > 1) ? true : false;
+ }

pr_info("Secure boot mode %s\n", enabled ? "enabled" : "disabled");

@@ -38,11 +48,20 @@ bool is_ppc_trustedboot_enabled(void)
{
struct device_node *node;
bool enabled = false;
+ const u32 *trustedboot;

- node = get_ppc_fw_sb_node();
- enabled = of_property_read_bool(node, "trusted-enabled");
+ if (machine_is(powernv)) {
+ node = get_ppc_fw_sb_node();
+ enabled = of_property_read_bool(node, "trusted-enabled");
+ of_node_put(node);
+ }

- of_node_put(node);
+ if (machine_is(pseries)) {
+ trustedboot =
+ of_get_property(of_root, "ibm,trusted-boot", NULL);
+ if (trustedboot)
+ enabled = (*trustedboot > 0) ? true : false;
+ }

pr_info("Trusted boot mode %s\n", enabled ? "enabled" : "disabled");

--
2.18.1
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