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s390/module: enable generic CPU feature modalias using s390 ELF hwcaps

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Add support for the generic CPU feature modalias implementation that wires
up optional CPU features to udev-based module autoprobing.

The <asm/cpufeature.h> file provides definitions to map CPU features to
s390 ELF hardware capabilities.

Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Hendrik Brueckner
2015-02-19 12:22:02 +01:00
committed by Martin Schwidefsky
parent 7d0c502040
commit 8f00b3e28f
4 changed files with 40 additions and 1 deletions
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9
arch/s390/kernel/processor.c
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@@ -40,6 +40,15 @@ void cpu_init(void)
enter_lazy_tlb(&init_mm, current);
}
/*
* cpu_have_feature - Test CPU features on module initialization
*/
int cpu_have_feature(unsigned int num)
{
return elf_hwcap & (1UL << num);
}
EXPORT_SYMBOL(cpu_have_feature);
/*
* show_cpuinfo - Get information on one CPU for use by procfs.
*/