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Diffstat (limited to 'arch/s390/boot/ipl_parm.c')
-rw-r--r--arch/s390/boot/ipl_parm.c110
1 files changed, 72 insertions, 38 deletions
diff --git a/arch/s390/boot/ipl_parm.c b/arch/s390/boot/ipl_parm.c
index 0f84c072625e..6bc950b92be7 100644
--- a/arch/s390/boot/ipl_parm.c
+++ b/arch/s390/boot/ipl_parm.c
@@ -3,51 +3,47 @@
#include <linux/init.h>
#include <linux/ctype.h>
#include <linux/pgtable.h>
+#include <asm/arch-stackprotector.h>
+#include <asm/abs_lowcore.h>
+#include <asm/page-states.h>
+#include <asm/machine.h>
#include <asm/ebcdic.h>
#include <asm/sclp.h>
#include <asm/sections.h>
#include <asm/boot_data.h>
#include <asm/facility.h>
+#include <asm/setup.h>
#include <asm/uv.h>
#include "boot.h"
+struct parmarea parmarea __section(".parmarea") = {
+ .kernel_version = (unsigned long)kernel_version,
+ .max_command_line_size = COMMAND_LINE_SIZE,
+ .command_line = "root=/dev/ram0 ro",
+};
+
char __bootdata(early_command_line)[COMMAND_LINE_SIZE];
-int __bootdata(noexec_disabled);
unsigned int __bootdata_preserved(zlib_dfltcc_support) = ZLIB_DFLTCC_FULL;
struct ipl_parameter_block __bootdata_preserved(ipl_block);
int __bootdata_preserved(ipl_block_valid);
+int __bootdata_preserved(__kaslr_enabled);
+int __bootdata_preserved(cmma_flag) = 1;
unsigned long vmalloc_size = VMALLOC_DEFAULT_SIZE;
unsigned long memory_limit;
int vmalloc_size_set;
-int kaslr_enabled;
static inline int __diag308(unsigned long subcode, void *addr)
{
- unsigned long reg1, reg2;
- union register_pair r1;
- psw_t old;
-
- r1.even = (unsigned long) addr;
- r1.odd = 0;
- asm volatile(
- " mvc 0(16,%[psw_old]),0(%[psw_pgm])\n"
- " epsw %[reg1],%[reg2]\n"
- " st %[reg1],0(%[psw_pgm])\n"
- " st %[reg2],4(%[psw_pgm])\n"
- " larl %[reg1],1f\n"
- " stg %[reg1],8(%[psw_pgm])\n"
+ union register_pair r1 = { .even = (unsigned long)addr, .odd = 0 };
+
+ asm_inline volatile(
" diag %[r1],%[subcode],0x308\n"
- "1: mvc 0(16,%[psw_pgm]),0(%[psw_old])\n"
- : [r1] "+&d" (r1.pair),
- [reg1] "=&d" (reg1),
- [reg2] "=&a" (reg2),
- "+Q" (S390_lowcore.program_new_psw),
- "=Q" (old)
- : [subcode] "d" (subcode),
- [psw_old] "a" (&old),
- [psw_pgm] "a" (&S390_lowcore.program_new_psw)
+ "0:\n"
+ EX_TABLE(0b, 0b)
+ : [r1] "+d" (r1.pair)
+ : [subcode] "d" (subcode)
: "cc", "memory");
return r1.odd;
}
@@ -70,6 +66,9 @@ bool is_ipl_block_dump(void)
if (ipl_block.pb0_hdr.pbt == IPL_PBT_NVME &&
ipl_block.nvme.opt == IPL_PB0_NVME_OPT_DUMP)
return true;
+ if (ipl_block.pb0_hdr.pbt == IPL_PBT_ECKD &&
+ ipl_block.eckd.opt == IPL_PB0_ECKD_OPT_DUMP)
+ return true;
return false;
}
@@ -101,6 +100,11 @@ static size_t ipl_block_get_ascii_scpdata(char *dest, size_t size,
scp_data_len = ipb->nvme.scp_data_len;
scp_data = ipb->nvme.scp_data;
break;
+ case IPL_PBT_ECKD:
+ scp_data_len = ipb->eckd.scp_data_len;
+ scp_data = ipb->eckd.scp_data;
+ break;
+
default:
goto out;
}
@@ -146,6 +150,7 @@ static void append_ipl_block_parm(void)
break;
case IPL_PBT_FCP:
case IPL_PBT_NVME:
+ case IPL_PBT_ECKD:
rc = ipl_block_get_ascii_scpdata(
parm, COMMAND_LINE_SIZE - len - 1, &ipl_block);
break;
@@ -170,12 +175,12 @@ static inline int has_ebcdic_char(const char *str)
void setup_boot_command_line(void)
{
- parmarea.command_line[ARCH_COMMAND_LINE_SIZE - 1] = 0;
+ parmarea.command_line[COMMAND_LINE_SIZE - 1] = 0;
/* convert arch command line to ascii if necessary */
if (has_ebcdic_char(parmarea.command_line))
- EBCASC(parmarea.command_line, ARCH_COMMAND_LINE_SIZE);
+ EBCASC(parmarea.command_line, COMMAND_LINE_SIZE);
/* copy arch command line */
- strcpy(early_command_line, strim(parmarea.command_line));
+ strscpy(early_command_line, strim(parmarea.command_line));
/* append IPL PARM data to the boot command line */
if (!is_prot_virt_guest() && ipl_block_valid)
@@ -197,7 +202,7 @@ static void check_cleared_facilities(void)
for (i = 0; i < ARRAY_SIZE(als); i++) {
if ((stfle_fac_list[i] & als[i]) != als[i]) {
- sclp_early_printk("Warning: The Linux kernel requires facilities cleared via command line option\n");
+ boot_emerg("The Linux kernel requires facilities cleared via command line option\n");
print_missing_facilities();
break;
}
@@ -248,8 +253,9 @@ void parse_boot_command_line(void)
char *args;
int rc;
- kaslr_enabled = IS_ENABLED(CONFIG_RANDOMIZE_BASE);
- args = strcpy(command_line_buf, early_command_line);
+ __kaslr_enabled = IS_ENABLED(CONFIG_RANDOMIZE_BASE);
+ strscpy(command_line_buf, early_command_line);
+ args = command_line_buf;
while (*args) {
args = next_arg(args, &param, &val);
@@ -257,7 +263,7 @@ void parse_boot_command_line(void)
memory_limit = round_down(memparse(val, NULL), PAGE_SIZE);
if (!strcmp(param, "vmalloc") && val) {
- vmalloc_size = round_up(memparse(val, NULL), PAGE_SIZE);
+ vmalloc_size = round_up(memparse(val, NULL), _SEGMENT_SIZE);
vmalloc_size_set = 1;
}
@@ -274,17 +280,25 @@ void parse_boot_command_line(void)
zlib_dfltcc_support = ZLIB_DFLTCC_FULL_DEBUG;
}
- if (!strcmp(param, "noexec")) {
- rc = kstrtobool(val, &enabled);
- if (!rc && !enabled)
- noexec_disabled = 1;
- }
-
if (!strcmp(param, "facilities") && val)
modify_fac_list(val);
+ if (!strcmp(param, "debug-alternative"))
+ alt_debug_setup(val);
+
if (!strcmp(param, "nokaslr"))
- kaslr_enabled = 0;
+ __kaslr_enabled = 0;
+
+ if (!strcmp(param, "cmma")) {
+ rc = kstrtobool(val, &enabled);
+ if (!rc && !enabled)
+ cmma_flag = 0;
+ }
+
+#ifdef CONFIG_STACKPROTECTOR
+ if (!strcmp(param, "debug_stackprotector"))
+ stack_protector_debug = 1;
+#endif
#if IS_ENABLED(CONFIG_KVM)
if (!strcmp(param, "prot_virt")) {
@@ -293,5 +307,25 @@ void parse_boot_command_line(void)
prot_virt_host = 1;
}
#endif
+ if (!strcmp(param, "relocate_lowcore") && test_facility(193))
+ set_machine_feature(MFEATURE_LOWCORE);
+ if (!strcmp(param, "earlyprintk"))
+ boot_earlyprintk = true;
+ if (!strcmp(param, "debug"))
+ boot_console_loglevel = CONSOLE_LOGLEVEL_DEBUG;
+ if (!strcmp(param, "bootdebug")) {
+ bootdebug = true;
+ if (val)
+ strscpy(bootdebug_filter, val);
+ }
+ if (!strcmp(param, "quiet"))
+ boot_console_loglevel = CONSOLE_LOGLEVEL_QUIET;
+ if (!strcmp(param, "ignore_loglevel"))
+ boot_ignore_loglevel = true;
+ if (!strcmp(param, "loglevel")) {
+ boot_console_loglevel = simple_strtoull(val, NULL, 10);
+ if (boot_console_loglevel < CONSOLE_LOGLEVEL_MIN)
+ boot_console_loglevel = CONSOLE_LOGLEVEL_MIN;
+ }
}
}
generated by cgit (git 2.34.1) at 2025-12-25 02:19:24 +0000