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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 /drivers/s390/char/sclp.h | |
| parent | s390/kprobes: use static buffer for insn_page (diff) | |
| download | linux-dev-087c4d7423989b110c3312592db05acc009a5d58.tar.xz linux-dev-087c4d7423989b110c3312592db05acc009a5d58.zip | |
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 'drivers/s390/char/sclp.h')
| -rw-r--r-- | drivers/s390/char/sclp.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/s390/char/sclp.h b/drivers/s390/char/sclp.h index 043f32ba3749..28b433960831 100644 --- a/drivers/s390/char/sclp.h +++ b/drivers/s390/char/sclp.h @@ -321,7 +321,7 @@ extern int sclp_console_drop; extern unsigned long sclp_console_full; extern bool sclp_mask_compat_mode; -extern char sclp_early_sccb[PAGE_SIZE]; +extern char *sclp_early_sccb; void sclp_early_wait_irq(void); int sclp_early_cmd(sclp_cmdw_t cmd, void *sccb); |