linux-kernel - Re: [PATCH v3 08/12] ppc64/kexec_file: setup the stack for purgatory

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Date:   Wed, 15 Jul 2020 21:35:07 -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>,
        Pingfan Liu <piliu@...hat.com>,
        Kexec-ml <kexec@...ts.infradead.org>,
        Mimi Zohar <zohar@...ux.ibm.com>,
        Nayna Jain <nayna@...ux.ibm.com>,
        Petr Tesarik <ptesarik@...e.cz>,
        Mahesh J Salgaonkar <mahesh@...ux.ibm.com>,
        Sourabh Jain <sourabhjain@...ux.ibm.com>,
        lkml <linux-kernel@...r.kernel.org>,
        linuxppc-dev <linuxppc-dev@...abs.org>,
        Eric Biederman <ebiederm@...ssion.com>,
        Dave Young <dyoung@...hat.com>, Vivek Goyal <vgoyal@...hat.com>
Subject: Re: [PATCH v3 08/12] ppc64/kexec_file: setup the stack for purgatory


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

> To avoid any weird errors, the purgatory should run with its own
> stack. Set one up by adding the stack buffer to .data section of
> the purgatory. Also, setup opal base & entry values in r8 & r9
> registers to help early OPAL debugging.
>
> Signed-off-by: Hari Bathini <hbathini@...ux.ibm.com>
> Tested-by: Pingfan Liu <piliu@...hat.com>

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

> ---
>
> v2 -> v3:
> * Unchanged. Added Tested-by tag from Pingfan.
>
> v1 -> v2:
> * Setting up opal base & entry values in r8 & r9 for early OPAL debug.
>
>
>  arch/powerpc/include/asm/kexec.h       |    4 ++++
>  arch/powerpc/kexec/file_load_64.c      |   29 +++++++++++++++++++++++++++++
>  arch/powerpc/purgatory/trampoline_64.S |   32 ++++++++++++++++++++++++++++++++
>  3 files changed, 65 insertions(+)
>

-- 
Thiago Jung Bauermann
IBM Linux Technology Center