[PATCH v3] powerpc/pseries: detect secure and trusted boot state of the system.

[PATCH v3] powerpc/pseries: detect secure and trusted boot state of the system.

[Nayna Jain]

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() functions to add support for pseries.

The secureboot and trustedboot state are exposed via device-tree property:
/proc/device-tree/ibm,secure-boot and /proc/device-tree/ibm,trusted-boot

The values of ibm,secure-boot under pseries are interpreted as:

0 - Disabled
1 - Enabled in Log-only mode. This patch interprets this value as
disabled, since audit mode is currently not supported for Linux.
2 - Enabled and enforced.
3-9 - Enabled and enforcing; requirements are at the discretion of the
operating system.

The values of ibm,trusted-boot under pseries are interpreted as:
0 - Disabled
1 - Enabled

Signed-off-by: Nayna Jain <nayna@linux.ibm.com>
Reviewed-by: Daniel Axtens <dja@axtens.net>
---
v3:
* fixed double check. Thanks Daniel for noticing it.
* updated patch description.

v2:
* included Michael Ellerman's feedback.
* added Daniel Axtens's Reviewed-by.

 arch/powerpc/kernel/secure_boot.c | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/kernel/secure_boot.c b/arch/powerpc/kernel/secure_boot.c
index 4b982324d368..118bcb5f79c4 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)
 {
@@ -23,12 +24,19 @@ bool is_ppc_secureboot_enabled(void)
 {
 	struct device_node *node;
 	bool enabled = false;
+	u32 secureboot;
 
 	node = get_ppc_fw_sb_node();
 	enabled = of_property_read_bool(node, "os-secureboot-enforcing");
-
 	of_node_put(node);
 
+	if (enabled)
+		goto out;
+
+	if (!of_property_read_u32(of_root, "ibm,secure-boot", &secureboot))
+		enabled = (secureboot > 1);
+
+out:
 	pr_info("Secure boot mode %s\n", enabled ? "enabled" : "disabled");
 
 	return enabled;
@@ -38,12 +46,19 @@ bool is_ppc_trustedboot_enabled(void)
 {
 	struct device_node *node;
 	bool enabled = false;
+	u32 trustedboot;
 
 	node = get_ppc_fw_sb_node();
 	enabled = of_property_read_bool(node, "trusted-enabled");
-
 	of_node_put(node);
 
+	if (enabled)
+		goto out;
+
+	if (!of_property_read_u32(of_root, "ibm,trusted-boot", &trustedboot))
+		enabled = (trustedboot > 0);
+
+out:
 	pr_info("Trusted boot mode %s\n", enabled ? "enabled" : "disabled");
 
 	return enabled;
-- 
2.26.2

[PATCH v3] powerpc/pseries: detect secure and trusted boot state of the system.

[Nayna Jain]

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() functions to add support for pseries.

The secureboot and trustedboot state are exposed via device-tree property:
/proc/device-tree/ibm,secure-boot and /proc/device-tree/ibm,trusted-boot

The values of ibm,secure-boot under pseries are interpreted as:

0 - Disabled
1 - Enabled in Log-only mode. This patch interprets this value as
disabled, since audit mode is currently not supported for Linux.
2 - Enabled and enforced.
3-9 - Enabled and enforcing; requirements are at the discretion of the
operating system.

The values of ibm,trusted-boot under pseries are interpreted as:
0 - Disabled
1 - Enabled

Signed-off-by: Nayna Jain <nayna@linux.ibm.com>
Reviewed-by: Daniel Axtens <dja@axtens.net>
---
v3:
* fixed double check. Thanks Daniel for noticing it.
* updated patch description.

v2:
* included Michael Ellerman's feedback.
* added Daniel Axtens's Reviewed-by.

 arch/powerpc/kernel/secure_boot.c | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/kernel/secure_boot.c b/arch/powerpc/kernel/secure_boot.c
index 4b982324d368..118bcb5f79c4 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)
 {
@@ -23,12 +24,19 @@ bool is_ppc_secureboot_enabled(void)
 {
 	struct device_node *node;
 	bool enabled = false;
+	u32 secureboot;
 
 	node = get_ppc_fw_sb_node();
 	enabled = of_property_read_bool(node, "os-secureboot-enforcing");
-
 	of_node_put(node);
 
+	if (enabled)
+		goto out;
+
+	if (!of_property_read_u32(of_root, "ibm,secure-boot", &secureboot))
+		enabled = (secureboot > 1);
+
+out:
 	pr_info("Secure boot mode %s\n", enabled ? "enabled" : "disabled");
 
 	return enabled;
@@ -38,12 +46,19 @@ bool is_ppc_trustedboot_enabled(void)
 {
 	struct device_node *node;
 	bool enabled = false;
+	u32 trustedboot;
 
 	node = get_ppc_fw_sb_node();
 	enabled = of_property_read_bool(node, "trusted-enabled");
-
 	of_node_put(node);
 
+	if (enabled)
+		goto out;
+
+	if (!of_property_read_u32(of_root, "ibm,trusted-boot", &trustedboot))
+		enabled = (trustedboot > 0);
+
+out:
 	pr_info("Trusted boot mode %s\n", enabled ? "enabled" : "disabled");
 
 	return enabled;
-- 
2.26.2

Re: [PATCH v3] powerpc/pseries: detect secure and trusted boot state of the system.

[Mimi Zohar]

On Wed, 2020-07-15 at 07:52 -0400, Nayna Jain wrote:
> 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() functions to add support for pseries.
> 
> The secureboot and trustedboot state are exposed via device-tree property:
> /proc/device-tree/ibm,secure-boot and /proc/device-tree/ibm,trusted-boot
> 
> The values of ibm,secure-boot under pseries are interpreted as:
> 
> 0 - Disabled
> 1 - Enabled in Log-only mode. This patch interprets this value as
> disabled, since audit mode is currently not supported for Linux.
> 2 - Enabled and enforced.
> 3-9 - Enabled and enforcing; requirements are at the discretion of the
> operating system.
> 
> The values of ibm,trusted-boot under pseries are interpreted as:
> 0 - Disabled
> 1 - Enabled
> 
> Signed-off-by: Nayna Jain <nayna@linux.ibm.com>
> Reviewed-by: Daniel Axtens <dja@axtens.net>

Thanks for updating the patch description.

Reviewed-by: Mimi Zohar <zohar@linux.ibm.com>

Re: [PATCH v3] powerpc/pseries: detect secure and trusted boot state of the system.

[Mimi Zohar]

On Wed, 2020-07-15 at 07:52 -0400, Nayna Jain wrote:
> 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() functions to add support for pseries.
> 
> The secureboot and trustedboot state are exposed via device-tree property:
> /proc/device-tree/ibm,secure-boot and /proc/device-tree/ibm,trusted-boot
> 
> The values of ibm,secure-boot under pseries are interpreted as:
> 
> 0 - Disabled
> 1 - Enabled in Log-only mode. This patch interprets this value as
> disabled, since audit mode is currently not supported for Linux.
> 2 - Enabled and enforced.
> 3-9 - Enabled and enforcing; requirements are at the discretion of the
> operating system.
> 
> The values of ibm,trusted-boot under pseries are interpreted as:
> 0 - Disabled
> 1 - Enabled
> 
> Signed-off-by: Nayna Jain <nayna@linux.ibm.com>
> Reviewed-by: Daniel Axtens <dja@axtens.net>

Thanks for updating the patch description.

Reviewed-by: Mimi Zohar <zohar@linux.ibm.com>

Re: [PATCH v3] powerpc/pseries: detect secure and trusted boot state of the system.

[Daniel Axtens]

Hi Nayna,

Looks good to me.

Sorry for not noticing this before, but I think
> +#include <asm/machdep.h>
is now superfluous (I think it's leftover from the machine_is
version?). Maybe mpe will take pity on you and remove it when he picks
up your patch.

Kind regards,
Daniel

>  
>  static struct device_node *get_ppc_fw_sb_node(void)
>  {
> @@ -23,12 +24,19 @@ bool is_ppc_secureboot_enabled(void)
>  {
>  	struct device_node *node;
>  	bool enabled = false;
> +	u32 secureboot;
>  
>  	node = get_ppc_fw_sb_node();
>  	enabled = of_property_read_bool(node, "os-secureboot-enforcing");
> -
>  	of_node_put(node);
>  
> +	if (enabled)
> +		goto out;
> +
> +	if (!of_property_read_u32(of_root, "ibm,secure-boot", &secureboot))
> +		enabled = (secureboot > 1);
> +
> +out:
>  	pr_info("Secure boot mode %s\n", enabled ? "enabled" : "disabled");
>  
>  	return enabled;
> @@ -38,12 +46,19 @@ bool is_ppc_trustedboot_enabled(void)
>  {
>  	struct device_node *node;
>  	bool enabled = false;
> +	u32 trustedboot;
>  
>  	node = get_ppc_fw_sb_node();
>  	enabled = of_property_read_bool(node, "trusted-enabled");
> -
>  	of_node_put(node);
>  
> +	if (enabled)
> +		goto out;
> +
> +	if (!of_property_read_u32(of_root, "ibm,trusted-boot", &trustedboot))
> +		enabled = (trustedboot > 0);
> +
> +out:
>  	pr_info("Trusted boot mode %s\n", enabled ? "enabled" : "disabled");
>  
>  	return enabled;
> -- 
> 2.26.2

Re: [PATCH v3] powerpc/pseries: detect secure and trusted boot state of the system.

[Daniel Axtens]

Hi Nayna,

Looks good to me.

Sorry for not noticing this before, but I think
> +#include <asm/machdep.h>
is now superfluous (I think it's leftover from the machine_is
version?). Maybe mpe will take pity on you and remove it when he picks
up your patch.

Kind regards,
Daniel

>  
>  static struct device_node *get_ppc_fw_sb_node(void)
>  {
> @@ -23,12 +24,19 @@ bool is_ppc_secureboot_enabled(void)
>  {
>  	struct device_node *node;
>  	bool enabled = false;
> +	u32 secureboot;
>  
>  	node = get_ppc_fw_sb_node();
>  	enabled = of_property_read_bool(node, "os-secureboot-enforcing");
> -
>  	of_node_put(node);
>  
> +	if (enabled)
> +		goto out;
> +
> +	if (!of_property_read_u32(of_root, "ibm,secure-boot", &secureboot))
> +		enabled = (secureboot > 1);
> +
> +out:
>  	pr_info("Secure boot mode %s\n", enabled ? "enabled" : "disabled");
>  
>  	return enabled;
> @@ -38,12 +46,19 @@ bool is_ppc_trustedboot_enabled(void)
>  {
>  	struct device_node *node;
>  	bool enabled = false;
> +	u32 trustedboot;
>  
>  	node = get_ppc_fw_sb_node();
>  	enabled = of_property_read_bool(node, "trusted-enabled");
> -
>  	of_node_put(node);
>  
> +	if (enabled)
> +		goto out;
> +
> +	if (!of_property_read_u32(of_root, "ibm,trusted-boot", &trustedboot))
> +		enabled = (trustedboot > 0);
> +
> +out:
>  	pr_info("Trusted boot mode %s\n", enabled ? "enabled" : "disabled");
>  
>  	return enabled;
> -- 
> 2.26.2

Re: [PATCH v3] powerpc/pseries: detect secure and trusted boot state of the system.

[Michael Ellerman]

Daniel Axtens <dja@axtens.net> writes:
> Hi Nayna,
>
> Looks good to me.
>
> Sorry for not noticing this before, but I think
>> +#include <asm/machdep.h>

> is now superfluous (I think it's leftover from the machine_is
> version?). Maybe mpe will take pity on you and remove it when he picks
> up your patch.

Yeah I did that.

cheers

Re: [PATCH v3] powerpc/pseries: detect secure and trusted boot state of the system.

[Michael Ellerman]

Daniel Axtens <dja@axtens.net> writes:
> Hi Nayna,
>
> Looks good to me.
>
> Sorry for not noticing this before, but I think
>> +#include <asm/machdep.h>

> is now superfluous (I think it's leftover from the machine_is
> version?). Maybe mpe will take pity on you and remove it when he picks
> up your patch.

Yeah I did that.

cheers

Re: [PATCH v3] powerpc/pseries: detect secure and trusted boot state of the system.

[Michal Suchánek]

On Wed, Jul 15, 2020 at 07:52:01AM -0400, Nayna Jain wrote:
> 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() functions to add support for pseries.
> 
> The secureboot and trustedboot state are exposed via device-tree property:
> /proc/device-tree/ibm,secure-boot and /proc/device-tree/ibm,trusted-boot
> 
> The values of ibm,secure-boot under pseries are interpreted as:
                                      ^^^
> 
> 0 - Disabled
> 1 - Enabled in Log-only mode. This patch interprets this value as
> disabled, since audit mode is currently not supported for Linux.
> 2 - Enabled and enforced.
> 3-9 - Enabled and enforcing; requirements are at the discretion of the
> operating system.
> 
> The values of ibm,trusted-boot under pseries are interpreted as:
                                       ^^^
These two should be different I suppose?

Thanks

Michal
> 0 - Disabled
> 1 - Enabled
> 
> Signed-off-by: Nayna Jain <nayna@linux.ibm.com>
> Reviewed-by: Daniel Axtens <dja@axtens.net>
> ---
> v3:
> * fixed double check. Thanks Daniel for noticing it.
> * updated patch description.
> 
> v2:
> * included Michael Ellerman's feedback.
> * added Daniel Axtens's Reviewed-by.
> 
>  arch/powerpc/kernel/secure_boot.c | 19 +++++++++++++++++--
>  1 file changed, 17 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/powerpc/kernel/secure_boot.c b/arch/powerpc/kernel/secure_boot.c
> index 4b982324d368..118bcb5f79c4 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)
>  {
> @@ -23,12 +24,19 @@ bool is_ppc_secureboot_enabled(void)
>  {
>  	struct device_node *node;
>  	bool enabled = false;
> +	u32 secureboot;
>  
>  	node = get_ppc_fw_sb_node();
>  	enabled = of_property_read_bool(node, "os-secureboot-enforcing");
> -
>  	of_node_put(node);
>  
> +	if (enabled)
> +		goto out;
> +
> +	if (!of_property_read_u32(of_root, "ibm,secure-boot", &secureboot))
> +		enabled = (secureboot > 1);
> +
> +out:
>  	pr_info("Secure boot mode %s\n", enabled ? "enabled" : "disabled");
>  
>  	return enabled;
> @@ -38,12 +46,19 @@ bool is_ppc_trustedboot_enabled(void)
>  {
>  	struct device_node *node;
>  	bool enabled = false;
> +	u32 trustedboot;
>  
>  	node = get_ppc_fw_sb_node();
>  	enabled = of_property_read_bool(node, "trusted-enabled");
> -
>  	of_node_put(node);
>  
> +	if (enabled)
> +		goto out;
> +
> +	if (!of_property_read_u32(of_root, "ibm,trusted-boot", &trustedboot))
> +		enabled = (trustedboot > 0);
> +
> +out:
>  	pr_info("Trusted boot mode %s\n", enabled ? "enabled" : "disabled");
>  
>  	return enabled;
> -- 
> 2.26.2
> 

Re: [PATCH v3] powerpc/pseries: detect secure and trusted boot state of the system.

[Michael Ellerman]

On Wed, 15 Jul 2020 07:52:01 -0400, Nayna Jain wrote:
> 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() functions to add support for pseries.
> 
> The secureboot and trustedboot state are exposed via device-tree property:
> /proc/device-tree/ibm,secure-boot and /proc/device-tree/ibm,trusted-boot
> 
> [...]

Applied to powerpc/next.

[1/1] powerpc/pseries: Detect secure and trusted boot state of the system.
      https://git.kernel.org/powerpc/c/61f879d97ce4510dd29d676a20d67692e3b34806

cheers

Re: [PATCH v3] powerpc/pseries: detect secure and trusted boot state of the system.

[Michael Ellerman]

On Wed, 15 Jul 2020 07:52:01 -0400, Nayna Jain wrote:
> 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() functions to add support for pseries.
> 
> The secureboot and trustedboot state are exposed via device-tree property:
> /proc/device-tree/ibm,secure-boot and /proc/device-tree/ibm,trusted-boot
> 
> [...]

Applied to powerpc/next.

[1/1] powerpc/pseries: Detect secure and trusted boot state of the system.
      https://git.kernel.org/powerpc/c/61f879d97ce4510dd29d676a20d67692e3b34806

cheers

Re: [PATCH v3] powerpc/pseries: detect secure and trusted boot state of the system.

[Daniel Axtens]

Michal Suchánek <msuchanek@suse.de> writes:

> On Wed, Jul 15, 2020 at 07:52:01AM -0400, Nayna Jain wrote:
>> 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() functions to add support for pseries.
>> 
>> The secureboot and trustedboot state are exposed via device-tree property:
>> /proc/device-tree/ibm,secure-boot and /proc/device-tree/ibm,trusted-boot
>> 
>> The values of ibm,secure-boot under pseries are interpreted as:
>                                       ^^^
>> 
>> 0 - Disabled
>> 1 - Enabled in Log-only mode. This patch interprets this value as
>> disabled, since audit mode is currently not supported for Linux.
>> 2 - Enabled and enforced.
>> 3-9 - Enabled and enforcing; requirements are at the discretion of the
>> operating system.
>> 
>> The values of ibm,trusted-boot under pseries are interpreted as:
>                                        ^^^
> These two should be different I suppose?

I'm not quite sure what you mean? They'll be documented in a future
revision of the PAPR, once I get my act together and submit the
relevant internal paperwork.

Daniel
>
> Thanks
>
> Michal
>> 0 - Disabled
>> 1 - Enabled
>> 
>> Signed-off-by: Nayna Jain <nayna@linux.ibm.com>
>> Reviewed-by: Daniel Axtens <dja@axtens.net>
>> ---
>> v3:
>> * fixed double check. Thanks Daniel for noticing it.
>> * updated patch description.
>> 
>> v2:
>> * included Michael Ellerman's feedback.
>> * added Daniel Axtens's Reviewed-by.
>> 
>>  arch/powerpc/kernel/secure_boot.c | 19 +++++++++++++++++--
>>  1 file changed, 17 insertions(+), 2 deletions(-)
>> 
>> diff --git a/arch/powerpc/kernel/secure_boot.c b/arch/powerpc/kernel/secure_boot.c
>> index 4b982324d368..118bcb5f79c4 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)
>>  {
>> @@ -23,12 +24,19 @@ bool is_ppc_secureboot_enabled(void)
>>  {
>>  	struct device_node *node;
>>  	bool enabled = false;
>> +	u32 secureboot;
>>  
>>  	node = get_ppc_fw_sb_node();
>>  	enabled = of_property_read_bool(node, "os-secureboot-enforcing");
>> -
>>  	of_node_put(node);
>>  
>> +	if (enabled)
>> +		goto out;
>> +
>> +	if (!of_property_read_u32(of_root, "ibm,secure-boot", &secureboot))
>> +		enabled = (secureboot > 1);
>> +
>> +out:
>>  	pr_info("Secure boot mode %s\n", enabled ? "enabled" : "disabled");
>>  
>>  	return enabled;
>> @@ -38,12 +46,19 @@ bool is_ppc_trustedboot_enabled(void)
>>  {
>>  	struct device_node *node;
>>  	bool enabled = false;
>> +	u32 trustedboot;
>>  
>>  	node = get_ppc_fw_sb_node();
>>  	enabled = of_property_read_bool(node, "trusted-enabled");
>> -
>>  	of_node_put(node);
>>  
>> +	if (enabled)
>> +		goto out;
>> +
>> +	if (!of_property_read_u32(of_root, "ibm,trusted-boot", &trustedboot))
>> +		enabled = (trustedboot > 0);
>> +
>> +out:
>>  	pr_info("Trusted boot mode %s\n", enabled ? "enabled" : "disabled");
>>  
>>  	return enabled;
>> -- 
>> 2.26.2
>> 

Re: [PATCH v3] powerpc/pseries: detect secure and trusted boot state of the system.

[Michal Suchánek]

On Fri, Jul 17, 2020 at 03:58:01PM +1000, Daniel Axtens wrote:
> Michal Suchánek <msuchanek@suse.de> writes:
> 
> > On Wed, Jul 15, 2020 at 07:52:01AM -0400, Nayna Jain wrote:
> >> 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() functions to add support for pseries.
> >> 
> >> The secureboot and trustedboot state are exposed via device-tree property:
> >> /proc/device-tree/ibm,secure-boot and /proc/device-tree/ibm,trusted-boot
> >> 
> >> The values of ibm,secure-boot under pseries are interpreted as:
> >                                       ^^^
> >> 
> >> 0 - Disabled
> >> 1 - Enabled in Log-only mode. This patch interprets this value as
> >> disabled, since audit mode is currently not supported for Linux.
> >> 2 - Enabled and enforced.
> >> 3-9 - Enabled and enforcing; requirements are at the discretion of the
> >> operating system.
> >> 
> >> The values of ibm,trusted-boot under pseries are interpreted as:
> >                                        ^^^
> > These two should be different I suppose?
> 
> I'm not quite sure what you mean? They'll be documented in a future
> revision of the PAPR, once I get my act together and submit the
> relevant internal paperwork.

Nevermind, one talks about secure boot, the other about trusted boot.

Thanks

Michal

Re: [PATCH v3] powerpc/pseries: detect secure and trusted boot state of the system.

[Michal Suchánek]

On Fri, Jul 17, 2020 at 03:58:01PM +1000, Daniel Axtens wrote:
> Michal Suchánek <msuchanek@suse.de> writes:
> 
> > On Wed, Jul 15, 2020 at 07:52:01AM -0400, Nayna Jain wrote:
> >> 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() functions to add support for pseries.
> >> 
> >> The secureboot and trustedboot state are exposed via device-tree property:
> >> /proc/device-tree/ibm,secure-boot and /proc/device-tree/ibm,trusted-boot
> >> 
> >> The values of ibm,secure-boot under pseries are interpreted as:
> >                                       ^^^
> >> 
> >> 0 - Disabled
> >> 1 - Enabled in Log-only mode. This patch interprets this value as
> >> disabled, since audit mode is currently not supported for Linux.
> >> 2 - Enabled and enforced.
> >> 3-9 - Enabled and enforcing; requirements are at the discretion of the
> >> operating system.
> >> 
> >> The values of ibm,trusted-boot under pseries are interpreted as:
> >                                        ^^^
> > These two should be different I suppose?
> 
> I'm not quite sure what you mean? They'll be documented in a future
> revision of the PAPR, once I get my act together and submit the
> relevant internal paperwork.

Nevermind, one talks about secure boot, the other about trusted boot.

Thanks

Michal