Sorry, the third patch can't be applied to the lastest kernel. I will send another version and attach the method to test this patchset. On 2019/6/28 19:13, Xiongfeng Wang wrote: > This patchset mark all the GICC node in MADT as possible CPUs even though it > is disabled. But only those enabled GICC node are marked as present CPUs. > So that kernel will initialize some CPU related data structure in advance before > the CPU is actually hot added into the system. This patchset also implement > 'acpi_(un)map_cpu()' and 'arch_(un)register_cpu()' for ARM64. These functions are > needed to enable CPU hotplug. > > To support CPU hotplug, we need to add all the possible GICC node in MADT > including those CPUs that are not present but may be hot added later. Those > CPUs are marked as disabled in GICC nodes. > > Xiongfeng Wang (3): > ACPI / scan: evaluate _STA for processors declared via ASL Device > statement > arm64: mark all the GICC nodes in MADT as possible cpu > arm64: Add CPU hotplug support > > arch/arm64/kernel/acpi.c | 22 ++++++++++++++++++++++ > arch/arm64/kernel/setup.c | 19 ++++++++++++++++++- > arch/arm64/kernel/smp.c | 11 +++++------ > drivers/acpi/scan.c | 12 ++++++++++++ > 4 files changed, 57 insertions(+), 7 deletions(-) >
