diff options
Diffstat (limited to 'arch/s390/boot/ipl_parm.c')
| -rw-r--r-- | arch/s390/boot/ipl_parm.c | 35 |
1 files changed, 12 insertions, 23 deletions
diff --git a/arch/s390/boot/ipl_parm.c b/arch/s390/boot/ipl_parm.c index d3731f2983b7..d04e9b89d14a 100644 --- a/arch/s390/boot/ipl_parm.c +++ b/arch/s390/boot/ipl_parm.c @@ -5,6 +5,7 @@ #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> @@ -34,29 +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" (get_lowcore()->program_new_psw), - "=Q" (old) - : [subcode] "d" (subcode), - [psw_old] "a" (&old), - [psw_pgm] "a" (&get_lowcore()->program_new_psw) + "0:\n" + EX_TABLE(0b, 0b) + : [r1] "+d" (r1.pair) + : [subcode] "d" (subcode) : "cc", "memory"); return r1.odd; } @@ -295,6 +281,9 @@ 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; @@ -312,7 +301,7 @@ void parse_boot_command_line(void) } #endif if (!strcmp(param, "relocate_lowcore") && test_facility(193)) - relocate_lowcore = 1; + set_machine_feature(MFEATURE_LOWCORE); if (!strcmp(param, "earlyprintk")) boot_earlyprintk = true; if (!strcmp(param, "debug")) |