diff options
| author | Mete Durlu <meted@linux.ibm.com> | 2025-01-08 11:31:27 +0100 |
|---|---|---|
| committer | Alexander Gordeev <agordeev@linux.ibm.com> | 2025-01-13 09:50:17 +0100 |
| commit | 9988df07dbe1ca8282f5ae95f1b534f91bab73fc (patch) | |
| tree | 9846a589cf155282d2ca257a668136b9f030f848 /arch/s390 | |
| parent | 03b3e82a78c32c7e4542c33fcd863028cddd9331 (diff) | |
s390/topology: Improve topology detection
Add early polarization detection instead of assuming horizontal
polarization.
Signed-off-by: Mete Durlu <meted@linux.ibm.com>
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/kernel/topology.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/s390/kernel/topology.c b/arch/s390/kernel/topology.c index 4f9c301a705b..39f5ed21f31a 100644 --- a/arch/s390/kernel/topology.c +++ b/arch/s390/kernel/topology.c @@ -556,6 +556,16 @@ static void __init alloc_masks(struct sysinfo_15_1_x *info, } } +static int __init detect_polarization(union topology_entry *tle) +{ + struct topology_core *tl_core; + + while (tle->nl) + tle = next_tle(tle); + tl_core = (struct topology_core *)tle; + return tl_core->pp != POLARIZATION_HRZ; +} + void __init topology_init_early(void) { struct sysinfo_15_1_x *info; @@ -575,6 +585,7 @@ void __init topology_init_early(void) __func__, PAGE_SIZE, PAGE_SIZE); info = tl_info; store_topology(info); + cpu_management = detect_polarization(info->tle); pr_info("The CPU configuration topology of the machine is: %d %d %d %d %d %d / %d\n", info->mag[0], info->mag[1], info->mag[2], info->mag[3], info->mag[4], info->mag[5], info->mnest); |