From: Cornelia Huck <cohuck@redhat.com>
To: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: qemu-s390x <qemu-s390x@nongnu.org>,
"Jason J. Herne" <jjherne@linux.ibm.com>,
Thomas Huth <thuth@redhat.com>,
qemu-devel <qemu-devel@nongnu.org>,
Janosch Frank <frankja@linux.ibm.com>
Subject: Re: [PATCH] s390-bios: Skip writing iplb location to low core for ccw ipl
Date: Wed, 4 Nov 2020 13:22:23 +0100 [thread overview]
Message-ID: <20201104132223.1ff51e5c.cohuck@redhat.com> (raw)
In-Reply-To: <20201030122823.347140-1-borntraeger@de.ibm.com>
On Fri, 30 Oct 2020 13:28:23 +0100
Christian Borntraeger <borntraeger@de.ibm.com> wrote:
> From: "Jason J. Herne" <jjherne@linux.ibm.com>
>
> The architecture states that the iplb location is only written to low
> core for list directed ipl and not for traditional ccw ipl. If we don't
> skip this then operating systems that load by reading into low core
> memory may fail to start.
>
> We should also not write the iplb pointer for network boot as it might
> overwrite content that we got via network.
>
> Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
> Fixes: 9bfc04f9ef68 ("pc-bios: s390x: Save iplb location in lowcore")
> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
> ---
> pc-bios/s390-ccw/main.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
Thanks, queued (together with a rebuild) to s390-fixes.
prev parent reply other threads:[~2020-11-04 12:27 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-30 12:28 [PATCH] s390-bios: Skip writing iplb location to low core for ccw ipl Christian Borntraeger
2020-11-03 12:08 ` Christian Borntraeger
2020-11-03 12:32 ` Thomas Huth
2020-11-03 12:35 ` Cornelia Huck
2020-11-03 17:15 ` Christian Borntraeger
2020-11-04 12:22 ` Cornelia Huck [this message]
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