diff options
| author | Heiko Carstens <hca@linux.ibm.com> | 2025-02-07 15:48:55 +0100 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2025-03-04 17:18:05 +0100 |
| commit | 949b73c9902613bddb789d9375981afbffe596fc (patch) | |
| tree | e96f5d7cf029f97be82bbc5683f59e5be4a768b7 /arch/s390/kernel | |
| parent | 3f5eede6dfdd2cf9f4c0156ccee20bd0e5d927aa (diff) | |
s390/cpufeature: Convert MACHINE_HAS_IDTE to cpu_has_idte()
Convert MACHINE_HAS_... to cpu_has_...() which uses test_facility() instead
of testing the machine_flags lowcore member if the feature is present.
test_facility() generates better code since it results in a static branch
without accessing memory. The branch is patched via alternatives by the
decompressor depending on the availability of the required facility.
Reviewed-by: Vasily Gorbik <gor@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/kernel')
| -rw-r--r-- | arch/s390/kernel/early.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c index 73f8824971ac..2af588670228 100644 --- a/arch/s390/kernel/early.c +++ b/arch/s390/kernel/early.c @@ -237,8 +237,6 @@ static __init void detect_diag9c(void) static __init void detect_machine_facilities(void) { - if (test_facility(3)) - get_lowcore()->machine_flags |= MACHINE_FLAG_IDTE; if (test_facility(50) && test_facility(73)) { get_lowcore()->machine_flags |= MACHINE_FLAG_TE; system_ctl_set_bit(0, CR0_TRANSACTIONAL_EXECUTION_BIT); |