mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-08-05 16:54:27 +00:00
65c9a9f925
Explicitly include <linux/export.h> in files which contain an
EXPORT_SYMBOL().
See commit a934a57a42 ("scripts/misc-check: check missing #include
<linux/export.h> when W=1") for more details.
Acked-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
52 lines
1.2 KiB
C
52 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Copyright IBM Corp. 2022
|
|
*/
|
|
|
|
#include <linux/cpufeature.h>
|
|
#include <linux/export.h>
|
|
#include <linux/bug.h>
|
|
#include <asm/machine.h>
|
|
#include <asm/elf.h>
|
|
|
|
enum {
|
|
TYPE_HWCAP,
|
|
TYPE_FACILITY,
|
|
TYPE_MACHINE,
|
|
};
|
|
|
|
struct s390_cpu_feature {
|
|
unsigned int type : 4;
|
|
unsigned int num : 28;
|
|
};
|
|
|
|
static struct s390_cpu_feature s390_cpu_features[MAX_CPU_FEATURES] = {
|
|
[S390_CPU_FEATURE_MSA] = {.type = TYPE_HWCAP, .num = HWCAP_NR_MSA},
|
|
[S390_CPU_FEATURE_VXRS] = {.type = TYPE_HWCAP, .num = HWCAP_NR_VXRS},
|
|
[S390_CPU_FEATURE_UV] = {.type = TYPE_FACILITY, .num = 158},
|
|
[S390_CPU_FEATURE_D288] = {.type = TYPE_MACHINE, .num = MFEATURE_DIAG288},
|
|
};
|
|
|
|
/*
|
|
* cpu_have_feature - Test CPU features on module initialization
|
|
*/
|
|
int cpu_have_feature(unsigned int num)
|
|
{
|
|
struct s390_cpu_feature *feature;
|
|
|
|
if (WARN_ON_ONCE(num >= MAX_CPU_FEATURES))
|
|
return 0;
|
|
feature = &s390_cpu_features[num];
|
|
switch (feature->type) {
|
|
case TYPE_HWCAP:
|
|
return !!(elf_hwcap & BIT(feature->num));
|
|
case TYPE_FACILITY:
|
|
return test_facility(feature->num);
|
|
case TYPE_MACHINE:
|
|
return test_machine_feature(feature->num);
|
|
default:
|
|
WARN_ON_ONCE(1);
|
|
return 0;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(cpu_have_feature);
|