diff options
| author | Vasily Gorbik <gor@linux.ibm.com> | 2019-02-27 17:36:35 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2019-03-01 08:00:42 +0100 |
| commit | 6d85dac2ab9292956b5864daee8e11c4e158a566 (patch) | |
| tree | 51036ea7962b147d4a0bb7d95033d5479df2ae3a /arch/s390/boot/ipl_parm.c | |
| parent | b5e804598d594934407a1a8548d7b65341fe2617 (diff) | |
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>
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); |