diff options
Diffstat (limited to 'arch/s390/boot/ipl_parm.c')
| -rw-r--r-- | arch/s390/boot/ipl_parm.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/s390/boot/ipl_parm.c b/arch/s390/boot/ipl_parm.c index 94e5374c3630..36beb56de021 100644 --- a/arch/s390/boot/ipl_parm.c +++ b/arch/s390/boot/ipl_parm.c @@ -1,4 +1,5 @@ // SPDX-License-Identifier: GPL-2.0 +#include <linux/kernel.h> #include <linux/init.h> #include <linux/ctype.h> #include <asm/ebcdic.h> @@ -152,6 +153,20 @@ static void modify_facility(unsigned long nr, bool clear) __set_facility(nr, S390_lowcore.stfle_fac_list); } +static void check_cleared_facilities(void) +{ + unsigned long als[] = { FACILITIES_ALS }; + int i; + + for (i = 0; i < ARRAY_SIZE(als); i++) { + if ((S390_lowcore.stfle_fac_list[i] & als[i]) != als[i]) { + sclp_early_printk("Warning: The Linux kernel requires facilities cleared via command line option\n"); + print_missing_facilities(); + break; + } + } +} + static void modify_fac_list(char *str) { unsigned long val, endval; @@ -185,6 +200,7 @@ static void modify_fac_list(char *str) break; str++; } + check_cleared_facilities(); } static char command_line_buf[COMMAND_LINE_SIZE] __section(.data); |