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| author | Huacai Chen <chenhuacai@loongson.cn> | 2024-11-12 11:35:36 +0300 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2024-11-12 11:35:36 +0300 |
| commit | a6654a40a852a4ca18aacced4cf5ca87997818d7 (patch) | |
| tree | 9d3b3803ef3a9223de270e7504a07842e9d0b17a /tools/perf/scripts/python/gecko.py | |
| parent | 2d5404caa8c7bb5c4e0435f94b28834ae5456623 (diff) | |
| download | linux-a6654a40a852a4ca18aacced4cf5ca87997818d7.tar.xz | |
LoongArch: For all possible CPUs setup logical-physical CPU mapping
In order to support ACPI-based physical CPU hotplug, we suppose for all
"possible" CPUs cpu_logical_map() can work. Because some drivers want to
use cpu_logical_map() for all "possible" CPUs, while currently we only
setup logical-physical mapping for "present" CPUs. This lack of mapping
also causes cpu_to_node() cannot work for hot-added CPUs.
All "possible" CPUs are listed in MADT, and the "present" subset is
marked as ACPI_MADT_ENABLED. To setup logical-physical CPU mapping for
all possible CPUs and keep present CPUs continuous in cpu_present_mask,
we parse MADT twice. The first pass handles CPUs with ACPI_MADT_ENABLED
and the second pass handles CPUs without ACPI_MADT_ENABLED.
The global flag (cpu_enumerated) is removed because acpi_map_cpu() calls
cpu_number_map() rather than set_processor_mask() now.
Reported-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'tools/perf/scripts/python/gecko.py')
0 files changed, 0 insertions, 0 deletions