提交 febf2407 编写于 作者: V Vitaly Kuznetsov 提交者: Rafael J. Wysocki

x86/ACPI: keep x86_cpu_to_acpiid mapping valid on CPU hotplug

We may or may not have all possible CPUs in MADT on boot but in any
case we're overwriting x86_cpu_to_acpiid mapping with U32_MAX when
acpi_register_lapic() is called again on the CPU hotplug path:

acpi_processor_hotadd_init()
  -> acpi_map_cpu()
    -> acpi_register_lapic()

As we have the required acpi_id information in acpi_processor_hotadd_init()
propagate it to acpi_map_cpu() to always keep x86_cpu_to_acpiid
mapping valid.
Reported-by: NAndrew Jones <drjones@redhat.com>
Signed-off-by: NVitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>
上级 d5adbfcd
......@@ -887,7 +887,8 @@ static int _acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu)
}
/* wrapper to silence section mismatch warning */
int __ref acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, int *pcpu)
int __ref acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id,
int *pcpu)
{
return _acpi_map_lsapic(handle, physid, pcpu);
}
......
......@@ -723,11 +723,12 @@ int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
return 0;
}
int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, int *pcpu)
int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id,
int *pcpu)
{
int cpu;
cpu = acpi_register_lapic(physid, U32_MAX, ACPI_MADT_ENABLED);
cpu = acpi_register_lapic(physid, acpi_id, ACPI_MADT_ENABLED);
if (cpu < 0) {
pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
return cpu;
......
......@@ -165,7 +165,7 @@ static int acpi_processor_errata(void)
#ifdef CONFIG_ACPI_HOTPLUG_CPU
int __weak acpi_map_cpu(acpi_handle handle,
phys_cpuid_t physid, int *pcpu)
phys_cpuid_t physid, u32 acpi_id, int *pcpu)
{
return -ENODEV;
}
......@@ -203,7 +203,7 @@ static int acpi_processor_hotadd_init(struct acpi_processor *pr)
cpu_maps_update_begin();
cpu_hotplug_begin();
ret = acpi_map_cpu(pr->handle, pr->phys_id, &pr->id);
ret = acpi_map_cpu(pr->handle, pr->phys_id, pr->acpi_id, &pr->id);
if (ret)
goto out;
......
......@@ -291,7 +291,8 @@ bool acpi_processor_validate_proc_id(int proc_id);
#ifdef CONFIG_ACPI_HOTPLUG_CPU
/* Arch dependent functions for cpu hotplug support */
int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, int *pcpu);
int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id,
int *pcpu);
int acpi_unmap_cpu(int cpu);
int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid);
#endif /* CONFIG_ACPI_HOTPLUG_CPU */
......
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