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[S390] kernel: Append scpdata to kernel boot command line

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Append scpdata to the kernel boot command line. If scpdata starts
with the equal sign (=), the kernel boot command line is replaced.
(For consistency with zIPL and IPL PARM parameters.)

To use scpdata for the kernel boot command line, scpdata must consist
of ascii characters only. If scpdata contains other characters,
scpdata is not appended to the kernel boot command line.
In addition, re-IPL is extended for setting scpdata for the next
Linux reboot.

Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Hendrik Brueckner
2009-09-11 10:28:40 +02:00
committed by Martin Schwidefsky
parent 6292b9ef5a
commit 684d2fd48e
4 changed files with 172 additions and 27 deletions
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5
arch/s390/include/asm/ipl.h
View File

@@ -57,6 +57,8 @@ struct ipl_block_fcp {
} __attribute__((packed));
#define DIAG308_VMPARM_SIZE 64
#define DIAG308_SCPDATA_SIZE (PAGE_SIZE - (sizeof(struct ipl_list_hdr) + \
offsetof(struct ipl_block_fcp, scp_data)))
struct ipl_block_ccw {
u8 load_parm[8];
@@ -91,7 +93,8 @@ extern void do_halt(void);
extern void do_poff(void);
extern void ipl_save_parameters(void);
extern void ipl_update_parameters(void);
extern void get_ipl_vmparm(char *);
extern size_t append_ipl_vmparm(char *, size_t);
extern size_t append_ipl_scpdata(char *, size_t);
enum {
IPL_DEVNO_VALID = 1,

2
arch/s390/include/asm/setup.h
View File

@@ -8,7 +8,7 @@
#ifndef _ASM_S390_SETUP_H
#define _ASM_S390_SETUP_H
#define COMMAND_LINE_SIZE 1024
#define COMMAND_LINE_SIZE 4096
#define ARCH_COMMAND_LINE_SIZE 896