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

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Date:   Wed, 15 Jul 2020 12:54:39 -0400
From:   Mimi Zohar <zohar@...ux.ibm.com>
To:     Nayna Jain <nayna@...ux.ibm.com>, linuxppc-dev@...abs.org
Cc:     Michael Ellerman <mpe@...erman.id.au>,
        Daniel Axtens <dja@...ens.net>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] powerpc/pseries: detect secure and trusted boot
 state of the system.

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@...ux.ibm.com>
> Reviewed-by: Daniel Axtens <dja@...ens.net>

Thanks for updating the patch description.

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