diff options
| author | Heiko Carstens <hca@linux.ibm.com> | 2025-02-07 15:48:50 +0100 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2025-03-04 17:18:04 +0100 |
| commit | b49ee5b38651643d9e643fb4c7465f4046022254 (patch) | |
| tree | b4f07b7e3cd13726a51a94be8009ad813a4ddf56 /arch/s390/kernel | |
| parent | 42805261fcea809e1e76243dfc5218f6f12c1614 (diff) | |
s390/cpufeature: Convert MACHINE_HAS_NX to cpu_has_nx()
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 9590921e8cdf..32a0983a0378 100644 --- a/arch/s390/kernel/early.c +++ b/arch/s390/kernel/early.c @@ -253,8 +253,6 @@ static __init void detect_machine_facilities(void) get_lowcore()->machine_flags |= MACHINE_FLAG_TLB_LC; if (test_facility(129)) system_ctl_set_bit(0, CR0_VECTOR_BIT); - if (test_facility(130)) - get_lowcore()->machine_flags |= MACHINE_FLAG_NX; if (test_facility(139) && (tod_clock_base.tod >> 63)) { /* Enabled signed clock comparator comparisons */ get_lowcore()->machine_flags |= MACHINE_FLAG_SCC; |