xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

s390: add zEC12 code generation support

Browse Source 
Allow to generate code that only runs on zEC12 machines.

Also add a check which prevents the kernel to run on machines which
do not have any of the following new facilities installed:

- (48) decimal-floating-point zoned-conversion
- (49) execution-hint
- (49) load-and-trap
- (49) miscellaneous-instruction-extensions
- (49) processor-assist
- (50) constrained transactional-execution
- (73) transactional-execution

48, 49, 50 and 73 are the bit numbers of the facility indications for
each of the required facilities.

Note that we assume that user-space gets compiled with the same
compiler options, therefore we also test for a dfp facility even
if the kernel doesn't make use of it.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
This commit is contained in:
Heiko Carstens
2012-11-13 10:26:37 +02:00
committed by Martin Schwidefsky
parent d1e57508fb
commit 991c15053a
4 changed files with 59 additions and 30 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
arch/s390/kernel/setup.c
View File

@@ -1006,6 +1006,9 @@ static void __init setup_hwcaps(void)
case 0x2818:
strcpy(elf_platform, "z196");
break;
case 0x2827:
strcpy(elf_platform, "zEC12");
break;
}
}