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Subject: Re: [PATCH v9 3/8] powerpc: detect the trusted boot state of the
 system
To:     Lakshmi Ramasubramanian <nramas@linux.microsoft.com>,
        Nayna Jain <nayna@linux.ibm.com>, linuxppc-dev@ozlabs.org,
        linux-efi@vger.kernel.org, linux-integrity@vger.kernel.org
Cc:     linux-kernel@vger.kernel.org,
        Michael Ellerman <mpe@ellerman.id.au>,
        Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        Paul Mackerras <paulus@samba.org>,
        Ard Biesheuvel <ard.biesheuvel@linaro.org>,
        Jeremy Kerr <jk@ozlabs.org>,
        Matthew Garret <matthew.garret@nebula.com>,
        Mimi Zohar <zohar@linux.ibm.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Claudio Carvalho <cclaudio@linux.ibm.com>,
        George Wilson <gcwilson@linux.ibm.com>,
        Elaine Palmer <erpalmer@us.ibm.com>,
        Eric Ricther <erichte@linux.ibm.com>,
        "Oliver O'Halloran" <oohall@gmail.com>,
        Prakhar Srivastava <prsriva02@gmail.com>
References: <20191024034717.70552-1-nayna@linux.ibm.com>
 <20191024034717.70552-4-nayna@linux.ibm.com>
 <d713ae8c-7223-b3f3-999b-0c9076733c17@linux.microsoft.com>
From:   Nayna Jain <nayna@linux.vnet.ibm.com>
Message-ID: <8a929e75-52c2-105b-365b-7521404a8ead@linux.vnet.ibm.com>
Date:   Fri, 25 Oct 2019 11:50:23 -0500
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On 10/24/19 12:38 PM, Lakshmi Ramasubramanian wrote:
> On 10/23/2019 8:47 PM, Nayna Jain wrote:
>
>> +bool is_ppc_trustedboot_enabled(void)
>> +{
>> +    struct device_node *node;
>> +    bool enabled = false;
>> +
>> +    node = get_ppc_fw_sb_node();
>> +    enabled = of_property_read_bool(node, "trusted-enabled");
>
> Can get_ppc_fw_sb_node return NULL?
> Would of_property_read_bool handle the case when node is NULL?

Yes.

Thanks & Regards,

      - Nayna