1 files changed, 36 insertions, 25 deletions

diff --git a/arch/s390/boot/ipl_parm.c b/arch/s390/boot/ipl_parm.c
index b24de9aabf7d..f584d7da29cb 100644
--- a/arch/s390/boot/ipl_parm.c
+++ b/arch/s390/boot/ipl_parm.c
@@ -3,7 +3,9 @@
 #include <linux/init.h>
 #include <linux/ctype.h>
 #include <linux/pgtable.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>
@@ -33,29 +35,14 @@ int vmalloc_size_set;
 
 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;
 }
@@ -192,7 +179,7 @@ void setup_boot_command_line(void)
 	if (has_ebcdic_char(parmarea.command_line))
 		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)
@@ -214,7 +201,7 @@ 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;
 		}
@@ -266,7 +253,8 @@ void parse_boot_command_line(void)
 	int rc;
 
 	__kaslr_enabled = IS_ENABLED(CONFIG_RANDOMIZE_BASE);
-	args = strcpy(command_line_buf, early_command_line);
+	strscpy(command_line_buf, early_command_line);
+	args = command_line_buf;
 	while (*args) {
 		args = next_arg(args, &param, &val);
 
@@ -294,6 +282,9 @@ void parse_boot_command_line(void)
 		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;
 
@@ -310,5 +301,25 @@ 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;
+		}
 	}
 }