linux-kernel - Re: [RESEND PATCH v5 07/11] ppc64/kexec_file: enable early kernel's OPAL calls

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Message-ID: <87eeowxu18.fsf@morokweng.localdomain>
Date:   Mon, 27 Jul 2020 23:17:23 -0300
From:   Thiago Jung Bauermann <bauerman@...ux.ibm.com>
To:     Hari Bathini <hbathini@...ux.ibm.com>
Cc:     Michael Ellerman <mpe@...erman.id.au>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Mahesh J Salgaonkar <mahesh@...ux.ibm.com>,
        Sourabh Jain <sourabhjain@...ux.ibm.com>,
        Vivek Goyal <vgoyal@...hat.com>,
        Dave Young <dyoung@...hat.com>,
        Petr Tesarik <ptesarik@...e.cz>,
        linuxppc-dev <linuxppc-dev@...abs.org>,
        Kexec-ml <kexec@...ts.infradead.org>,
        lkml <linux-kernel@...r.kernel.org>,
        Pingfan Liu <piliu@...hat.com>,
        Eric Biederman <ebiederm@...ssion.com>,
        Mimi Zohar <zohar@...ux.ibm.com>,
        Nayna Jain <nayna@...ux.ibm.com>
Subject: Re: [RESEND PATCH v5 07/11] ppc64/kexec_file: enable early kernel's OPAL calls


Hari Bathini <hbathini@...ux.ibm.com> writes:

> Kernel built with CONFIG_PPC_EARLY_DEBUG_OPAL enabled expects r8 & r9
> to be filled with OPAL base & entry addresses respectively. Setting
> these registers allows the kernel to perform OPAL calls before the
> device tree is parsed.
>
> Signed-off-by: Hari Bathini <hbathini@...ux.ibm.com>

Reviewed-by: Thiago Jung Bauermann <bauerman@...ux.ibm.com>

-- 
Thiago Jung Bauermann
IBM Linux Technology Center