linux-kernel - Re: [PATCH] powerpc/prom_init: Undo relocation before entering secure mode

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Date:   Fri, 27 Sep 2019 17:38:38 -0300
From:   Thiago Jung Bauermann <bauerman@...ux.ibm.com>
To:     linuxppc-dev@...ts.ozlabs.org
Cc:     Paul Mackerras <paulus@...ba.org>,
        Mike Anderson <andmike@...ux.ibm.com>,
        Ram Pai <linuxram@...ibm.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] powerpc/prom_init: Undo relocation before entering secure mode


Thiago Jung Bauermann <bauerman@...ux.ibm.com> writes:

> Thiago Jung Bauermann <bauerman@...ux.ibm.com> writes:
>
>> The ultravisor will do an integrity check of the kernel image but we
>> relocated it so the check will fail. Restore the original image by
>> relocating it back to the kernel virtual base address.
>>
>> This works because during build vmlinux is linked with an expected virtual
>> runtime address of KERNELBASE.
>>
>> Fixes: 6a9c930bd775 ("powerpc/prom_init: Add the ESM call to prom_init")
>> Signed-off-by: Thiago Jung Bauermann <bauerman@...ux.ibm.com>
>
> I meant to put a Suggested-by: Paul Mackerras <paulus@...ba.org>
>
> Sorry. Will add it if there's a v2.

Ping?

-- 
Thiago Jung Bauermann
IBM Linux Technology Center