Commit fe086a7b authored by Alex Chiang's avatar Alex Chiang Committed by Tony Luck

[IA64] Provide ACPI fixup for /proc/cpuinfo/physical_id

Legacy HP ia64 platforms currently cannot provide
/proc/cpuinfo/physical_id due to legacy SAL/PAL implementations.
However, that physical topology information can be obtained
via ACPI.

Provide an interface that gives ACPI one last chance to provide
physical_id for these legacy platforms. This logic only comes
into play iff:

- ACPI actually provides slot information for the CPU
- we lack a valid socket_id

Otherwise, we don't do anything.

Since x86 uses the ACPI processor driver as well, we provide a nop
stub function for arch_fix_phys_package_id() in asm-x86/topology.h
Signed-off-by: default avatarAlex Chiang <achiang@hp.com>
Signed-off-by: default avatarTony Luck <tony.luck@intel.com>
parent 6ff0bc94
......@@ -27,6 +27,15 @@
static struct ia64_cpu *sysfs_cpus;
void arch_fix_phys_package_id(int num, u32 slot)
{
#ifdef CONFIG_SMP
if (cpu_data(num)->socket_id == -1)
cpu_data(num)->socket_id = slot;
#endif
}
EXPORT_SYMBOL_GPL(arch_fix_phys_package_id);
int arch_register_cpu(int num)
{
#if defined (CONFIG_ACPI) && defined (CONFIG_HOTPLUG_CPU)
......
......@@ -603,6 +603,15 @@ static int acpi_processor_get_info(struct acpi_processor *pr, unsigned has_uid)
request_region(pr->throttling.address, 6, "ACPI CPU throttle");
}
/*
* If ACPI describes a slot number for this CPU, we can use it
* ensure we get the right value in the "physical id" field
* of /proc/cpuinfo
*/
status = acpi_evaluate_object(pr->handle, "_SUN", NULL, &buffer);
if (ACPI_SUCCESS(status))
arch_fix_phys_package_id(pr->id, object.integer.value);
return 0;
}
......
......@@ -116,6 +116,8 @@ void build_cpu_to_node_map(void);
#define smt_capable() (smp_num_siblings > 1)
#endif
extern void arch_fix_phys_package_id(int num, u32 slot);
#define pcibus_to_cpumask(bus) (pcibus_to_node(bus) == -1 ? \
CPU_MASK_ALL : \
node_to_cpumask(pcibus_to_node(bus)) \
......
......@@ -193,6 +193,10 @@ extern cpumask_t cpu_coregroup_map(int cpu);
#define topology_thread_siblings(cpu) (per_cpu(cpu_sibling_map, cpu))
#endif
static inline void arch_fix_phys_package_id(int num, u32 slot)
{
}
struct pci_bus;
void set_pci_bus_resources_arch_default(struct pci_bus *b);
......
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