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linux/arch/s390/boot/boot.h

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s390: remove decompressor's head.S Decompressor's head.S provided "data mover" sole purpose of which has been to safely move uncompressed kernel at 0x100000 and jump to it. With current bzImage layout entire decompressor's code guaranteed to be in a safe location under 0x100000, and hence could not be overwritten during kernel move. For that reason head.S could be replaced with simple memmove function. To do so introduce early boot code phase which is executed from arch/s390/boot/head.S after "verify_facilities" and takes care of optional kernel image decompression and transition to it. Reviewed-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2018-07-19 13:11:28 +02:00
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef BOOT_BOOT_H
#define BOOT_BOOT_H
void startup_kernel(void);
s390/mem_detect: move tprot loop to early boot phase Move memory detection to early boot phase. To store online memory regions "struct mem_detect_info" has been introduced together with for_each_mem_detect_block iterator. mem_detect_info is later converted to memblock. Also introduces sclp_early_get_meminfo function to get maximum physical memory and maximum increment number. Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Reviewed-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2018-04-11 11:56:55 +02:00
void detect_memory(void);
s390: move ipl block and cmd line handling to early boot phase 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>
2018-05-15 13:28:53 +02:00
void store_ipl_parmblock(void);
void setup_boot_command_line(void);
s390: allow overriding facilities via command line Add "facilities=" command line option which allows to override facility bits returned by stfle. The main purpose of that is debugging aids which allows to test specific kernel behaviour depending on specific facilities presence. It also affects CPU alternatives. "facilities=" command line option format is comma separated list of integer values to be additionally set or cleared (if value is starting with "!"). Values ranges are also supported. e.g.: facilities=!130-160,159,167-169 Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2019-02-27 16:52:42 +01:00
void parse_boot_command_line(void);
s390: move ipl block and cmd line handling to early boot phase 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>
2018-05-15 13:28:53 +02:00
void setup_memory_end(void);
s390/boot: add missing declarations and includes Add __swsusp_reset_dma declaration to avoid the following sparse warnings: arch/s390/kernel/setup.c:107:15: warning: symbol '__swsusp_reset_dma' was not declared. Should it be static? arch/s390/boot/startup.c:52:15: warning: symbol '__swsusp_reset_dma' was not declared. Should it be static? Add verify_facilities declaration to avoid the following sparse warning: arch/s390/boot/als.c:105:6: warning: symbol 'verify_facilities' was not declared. Should it be static? Include "boot.h" into arch/s390/boot/kaslr.c to expose get_random_base function declaration and avoid the following sparse warning: arch/s390/boot/kaslr.c:90:15: warning: symbol 'get_random_base' was not declared. Should it be static? Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
2019-07-17 19:38:42 +02:00
void verify_facilities(void);
s390: warn about clearing als implied facilities Add a warning about removing required architecture level set facilities via "facilities=" command line option. Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2019-02-27 17:36:35 +01:00
void print_missing_facilities(void);
s390/startup: add pgm check info printing Try to print out startup pgm check info including exact linux kernel version, pgm interruption code and ilc, psw and general registers. Like the following: Linux version 5.3.0-rc7-07282-ge7b4d41d61bd-dirty (gor@tuxmaker) #3 SMP PREEMPT Thu Sep 5 16:07:34 CEST 2019 Kernel fault: interruption code 0005 ilc:2 PSW : 0000000180000000 0000000000012e52 R:0 T:0 IO:0 EX:0 Key:0 M:0 W:0 P:0 AS:0 CC:0 PM:0 RI:0 EA:3 GPRS: 0000000000000000 00ffffffffffffff 0000000000000000 0000000000019a58 000000000000bf68 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 000000000001a041 0000000000000000 0000000004c9c000 0000000000010070 0000000000012e42 000000000000beb0 This info makes it apparent that kernel startup failed and might help to understand what went wrong without actual standalone dump. Printing code runs on its own stack of 1 page (at unused 0x5000), which should be sufficient for sclp_early_printk usage (typical stack usage observed has been around 512 bytes). The code has pgm check recursion prevention, despite pgm check info printing failure (follow on pgm check) or success it restores original faulty psw and gprs and does disabled wait. Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2019-08-08 20:09:08 +02:00
void print_pgm_check_info(void);
s390/kernel: add support for kernel address space layout randomization (KASLR) This patch adds support for relocating the kernel to a random address. The random kernel offset is obtained from cpacf, using either TRNG, PRNO, or KMC_PRNG, depending on supported MSA level. KERNELOFFSET is added to vmcoreinfo, for crash --kaslr support. 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>
2019-02-03 21:37:20 +01:00
unsigned long get_random_base(unsigned long safe_addr);
extern int kaslr_enabled;
s390: enable detection of kernel version from bzImage Extend "parmarea" to include an offset of the version string, which is stored as 8-byte big endian value. To retrieve version string from bzImage reliably, one should check the presence of "S390EP" ascii string at 0x10008 (available since v3.2), then read the version string offset from 0x10428 (which has been 0 since v3.2 up to now). The string is null terminated. Could be retrieved with the following "file" command magic (requires file v5.34): 8 string \x02\x00\x00\x18\x60\x00\x00\x50\x02\x00\x00\x68\x60\x00\x00\x50\x40\x40\x40\x40\x40\x40\x40\x40 Linux S390 >0x10008 string S390EP >>0x10428 bequad >0 >>>(0x10428.Q) string >\0 \b, version %s Reported-by: Petr Tesarik <ptesarik@suse.com> Suggested-by: Petr Tesarik <ptesarik@suse.com> Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2019-07-15 15:30:33 +02:00
extern const char kernel_version[];
s390: remove decompressor's head.S Decompressor's head.S provided "data mover" sole purpose of which has been to safely move uncompressed kernel at 0x100000 and jump to it. With current bzImage layout entire decompressor's code guaranteed to be in a safe location under 0x100000, and hence could not be overwritten during kernel move. For that reason head.S could be replaced with simple memmove function. To do so introduce early boot code phase which is executed from arch/s390/boot/head.S after "verify_facilities" and takes care of optional kernel image decompression and transition to it. Reviewed-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2018-07-19 13:11:28 +02:00
s390/ipl: read IPL report at early boot Read the IPL Report block provided by secure-boot, add the entries of the certificate list to the system key ring and print the list of components. PR: Adjust to Vasilys bootdata_preserved patch set. Preserve ipl_cert_list for later use in kexec_file. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Philipp Rudo <prudo@linux.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2019-02-21 14:23:04 +01:00
unsigned long read_ipl_report(unsigned long safe_offset);
s390: remove decompressor's head.S Decompressor's head.S provided "data mover" sole purpose of which has been to safely move uncompressed kernel at 0x100000 and jump to it. With current bzImage layout entire decompressor's code guaranteed to be in a safe location under 0x100000, and hence could not be overwritten during kernel move. For that reason head.S could be replaced with simple memmove function. To do so introduce early boot code phase which is executed from arch/s390/boot/head.S after "verify_facilities" and takes care of optional kernel image decompression and transition to it. Reviewed-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2018-07-19 13:11:28 +02:00
#endif /* BOOT_BOOT_H */
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