diff options
| author | Hendrik Brueckner <brueckner@linux.vnet.ibm.com> | 2008-07-14 09:59:09 +0200 |
|---|---|---|
| committer | Heiko Carstens <heiko.carstens@de.ibm.com> | 2008-07-14 10:02:14 +0200 |
| commit | a0443fbb467af5e5930b9b059b52190605f70059 (patch) | |
| tree | f8e14901a87201539f1f6124c4c0fd018da712eb /include | |
| parent | fe1372306149d8c8a68d43765e7caea2377003b6 (diff) | |
[S390] Extra Kernel Parameters via VMPARM
Now it is possible to specify additional kernel parameters on the IPL
command line using the IPL PARM option.
If the Linux system is already running, the new reipl sysfs attribute
'parm' can be used to change kernel parameters for the next reboot.
Examples:
IPL C PARM dasd=1234 root=/dev/dasda1
IPL 1234 PARM savesys=mylnxnss
echo "init=/bin/bash" > /sys/firmware/reipl/ccw/parm
Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/asm-s390/ipl.h | 17 | ||||
| -rw-r--r-- | include/asm-s390/setup.h | 4 |
2 files changed, 17 insertions, 4 deletions
diff --git a/include/asm-s390/ipl.h b/include/asm-s390/ipl.h index c1b2e50392b..eaca6dff540 100644 --- a/include/asm-s390/ipl.h +++ b/include/asm-s390/ipl.h @@ -56,15 +56,19 @@ struct ipl_block_fcp { u8 scp_data[]; } __attribute__((packed)); +#define DIAG308_VMPARM_SIZE 64 + struct ipl_block_ccw { - u8 load_param[8]; + u8 load_parm[8]; u8 reserved1[84]; u8 reserved2[2]; u16 devno; u8 vm_flags; u8 reserved3[3]; u32 vm_parm_len; - u8 reserved4[80]; + u8 nss_name[8]; + u8 vm_parm[DIAG308_VMPARM_SIZE]; + u8 reserved4[8]; } __attribute__((packed)); struct ipl_parameter_block { @@ -73,7 +77,7 @@ struct ipl_parameter_block { struct ipl_block_fcp fcp; struct ipl_block_ccw ccw; } ipl_info; -} __attribute__((packed)); +} __attribute__((packed,aligned(4096))); /* * IPL validity flags @@ -86,6 +90,8 @@ extern void do_reipl(void); 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 *); enum { IPL_DEVNO_VALID = 1, @@ -147,6 +153,11 @@ enum diag308_flags { DIAG308_FLAGS_LP_VALID = 0x80, }; +enum diag308_vm_flags { + DIAG308_VM_FLAGS_NSS_VALID = 0x80, + DIAG308_VM_FLAGS_VP_VALID = 0x40, +}; + enum diag308_rc { DIAG308_RC_OK = 1, }; diff --git a/include/asm-s390/setup.h b/include/asm-s390/setup.h index ba69674012a..f5eebc48d98 100644 --- a/include/asm-s390/setup.h +++ b/include/asm-s390/setup.h @@ -8,7 +8,9 @@ #ifndef _ASM_S390_SETUP_H #define _ASM_S390_SETUP_H -#define COMMAND_LINE_SIZE 896 +#define COMMAND_LINE_SIZE 1024 + +#define ARCH_COMMAND_LINE_SIZE 896 #ifdef __KERNEL__ |