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| author | Heiko Carstens <hca@linux.ibm.com> | 2023-10-27 15:12:36 +0300 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2023-11-06 00:34:57 +0300 |
| commit | 468a3bc2b7b955a7cf97d47c6022bf1ae4a538a3 (patch) | |
| tree | a180e3f87155fc16e260c1527235d080b6c9fed6 /arch/s390/boot/ipl_parm.c | |
| parent | 92b519f3bc1c90e098bb3f12d8e739fc56c2d444 (diff) | |
| download | linux-468a3bc2b7b955a7cf97d47c6022bf1ae4a538a3.tar.xz | |
s390/cmma: move parsing of cmma kernel parameter to early boot code
The "cmma=" kernel command line parameter needs to be parsed early for
upcoming changes. Therefore move the parsing code.
Note that EX_TABLE handling of cmma_test_essa() needs to be open-coded,
since the early boot code doesn't have infrastructure for handling expected
exceptions.
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'arch/s390/boot/ipl_parm.c')
| -rw-r--r-- | arch/s390/boot/ipl_parm.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/s390/boot/ipl_parm.c b/arch/s390/boot/ipl_parm.c index 7b7521762633..2ab4872fbee1 100644 --- a/arch/s390/boot/ipl_parm.c +++ b/arch/s390/boot/ipl_parm.c @@ -3,6 +3,7 @@ #include <linux/init.h> #include <linux/ctype.h> #include <linux/pgtable.h> +#include <asm/page-states.h> #include <asm/ebcdic.h> #include <asm/sclp.h> #include <asm/sections.h> @@ -24,6 +25,7 @@ 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; @@ -295,6 +297,12 @@ void parse_boot_command_line(void) if (!strcmp(param, "nokaslr")) __kaslr_enabled = 0; + if (!strcmp(param, "cmma")) { + rc = kstrtobool(val, &enabled); + if (!rc && !enabled) + cmma_flag = 0; + } + #if IS_ENABLED(CONFIG_KVM) if (!strcmp(param, "prot_virt")) { rc = kstrtobool(val, &enabled); |