summaryrefslogtreecommitdiffstats
path: root/arch/s390/include/asm/setup.h
diff options
context:
space:
mode:
authorGerald Schaefer <gerald.schaefer@de.ibm.com>2019-04-08 12:49:58 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2019-04-29 10:47:10 +0200
commit087c4d7423989b110c3312592db05acc009a5d58 (patch)
tree62ff0f5c1121de80e098cbe317a287b4329c2194 /arch/s390/include/asm/setup.h
parents390/kprobes: use static buffer for insn_page (diff)
downloadlinux-087c4d7423989b110c3312592db05acc009a5d58.tar.xz
linux-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 'arch/s390/include/asm/setup.h')
-rw-r--r--arch/s390/include/asm/setup.h5
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/s390/include/asm/setup.h b/arch/s390/include/asm/setup.h
index b603cc09c895..d202756d6291 100644
--- a/arch/s390/include/asm/setup.h
+++ b/arch/s390/include/asm/setup.h
@@ -12,7 +12,10 @@
#define EP_OFFSET 0x10008
#define EP_STRING "S390EP"
#define PARMAREA 0x10400
-#define PARMAREA_END 0x11000
+#define EARLY_SCCB_OFFSET 0x11000
+#define HEAD_END 0x12000
+
+#define EARLY_SCCB_SIZE PAGE_SIZE
/*
* Machine features detected in early.c