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s390: move ipl block and cmd line handling to early boot phase

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To distinguish zfcpdump case and to be able to parse some of the kernel
command line arguments early (e.g. mem=) ipl block retrieval and command
line construction code is moved to the early boot phase.

"memory_end" is set up correctly respecting "mem=" and hsa_size in case
of the zfcpdump.

arch/s390/boot/string.c is introduced to provide string handling and
command line parsing functions to early boot phase code for the compressed
kernel image case.

Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Vasily Gorbik
2018-05-15 13:28:53 +02:00
committed by Martin Schwidefsky
parent b09decfd99
commit 49698745e5
15 changed files with 355 additions and 176 deletions
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11
arch/s390/include/asm/boot_data.h Normal file
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@@ -0,0 +1,11 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_S390_BOOT_DATA_H
#include <asm/setup.h>
#include <asm/ipl.h>
extern char early_command_line[COMMAND_LINE_SIZE];
extern struct ipl_parameter_block early_ipl_block;
extern int early_ipl_block_valid;
#endif /* _ASM_S390_BOOT_DATA_H */

4
arch/s390/include/asm/ipl.h
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@@ -89,8 +89,8 @@ void __init save_area_add_vxrs(struct save_area *, __vector128 *vxrs);
extern void s390_reset_system(void);
extern void ipl_store_parameters(void);
extern size_t append_ipl_vmparm(char *, size_t);
extern size_t append_ipl_scpdata(char *, size_t);
extern size_t ipl_block_get_ascii_vmparm(char *dest, size_t size,
const struct ipl_parameter_block *ipb);
enum ipl_type {
IPL_TYPE_UNKNOWN = 1,