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authorVasily Gorbik <gor@linux.ibm.com>2019-08-02 12:28:20 +0200
committerVasily Gorbik <gor@linux.ibm.com>2019-08-21 12:41:43 +0200
commit59793c5ab93fed9661deaf6d8ba054af681c0a6a (patch)
tree732f6ea401fca87cab2a995d8a32140157c8c2af /arch/s390/boot
parentf62f7dcbf023160ca47eb4bc7228ece8207f8a8e (diff)
downloadlinux-59793c5ab93fed9661deaf6d8ba054af681c0a6a.tar.bz2
s390: move vmalloc option parsing to startup code
Few other crucial memory setup options are already handled in the startup code. Those values are needed by kaslr and kasan implementations. "vmalloc" is the last piece required for future improvements such as early decision on kernel page levels depth required for actual memory setup, as well as vmalloc memory area access monitoring in kasan. Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'arch/s390/boot')
-rw-r--r--arch/s390/boot/ipl_parm.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/s390/boot/ipl_parm.c b/arch/s390/boot/ipl_parm.c
index 3c49bde8aa5e..449d26a42f3f 100644
--- a/arch/s390/boot/ipl_parm.c
+++ b/arch/s390/boot/ipl_parm.c
@@ -7,6 +7,7 @@
#include <asm/sections.h>
#include <asm/boot_data.h>
#include <asm/facility.h>
+#include <asm/pgtable.h>
#include <asm/uv.h>
#include "boot.h"
@@ -14,6 +15,7 @@ char __bootdata(early_command_line)[COMMAND_LINE_SIZE];
struct ipl_parameter_block __bootdata_preserved(ipl_block);
int __bootdata_preserved(ipl_block_valid);
+unsigned long __bootdata(vmalloc_size) = VMALLOC_DEFAULT_SIZE;
unsigned long __bootdata(memory_end);
int __bootdata(memory_end_set);
int __bootdata(noexec_disabled);
@@ -226,6 +228,9 @@ void parse_boot_command_line(void)
memory_end_set = 1;
}
+ if (!strcmp(param, "vmalloc"))
+ vmalloc_size = round_up(memparse(val, NULL), PAGE_SIZE);
+
if (!strcmp(param, "noexec")) {
rc = kstrtobool(val, &enabled);
if (!rc && !enabled)