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| author | Gerald Schaefer <gerald.schaefer@de.ibm.com> | 2019-04-08 12:49:58 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2019-04-29 10:47:10 +0200 |
| commit | 087c4d7423989b110c3312592db05acc009a5d58 (patch) | |
| tree | 62ff0f5c1121de80e098cbe317a287b4329c2194 /arch/s390/boot | |
| parent | fd3d2742d558d33560ec5dfee3001e561b5c0822 (diff) | |
| download | linux-087c4d7423989b110c3312592db05acc009a5d58.tar.bz2 | |
s390/sclp: do not use static sccbs
The sccbs for init/read/sdias/early have to be located below 2 GB, and
they are currently defined as a static buffer.
With a relocatable kernel that could reside at any place in memory, this
will no longer guarantee the location below 2 GB, so use a dynamic
GFP_DMA allocation instead.
The sclp_early_sccb buffer needs special handling, as it can be used
very early, and by both the decompressor and also the decompressed
kernel. Therefore, a fixed 4 KB buffer is introduced at 0x11000, the
former PARMAREA_END. The new PARMAREA_END is now 0x12000, and it is
renamed to HEAD_END, as it is rather the end of head.S and not the end
of the parmarea.
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Reviewed-by: Philipp Rudo <prudo@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/boot')
| -rw-r--r-- | arch/s390/boot/head.S | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/s390/boot/head.S b/arch/s390/boot/head.S index d585c4dbdac7..c6b4b4c5dd58 100644 --- a/arch/s390/boot/head.S +++ b/arch/s390/boot/head.S @@ -336,4 +336,7 @@ ENTRY(startup_kdump) .byte "root=/dev/ram0 ro" .byte 0 - .org 0x11000 + .org EARLY_SCCB_OFFSET + .fill 4096 + + .org HEAD_END |