[patch 06/11] x86/topology: Provide helper to retrieve number of cpu packages

[Thomas Gleixner]

For services which are per package, e.g. intel_uncore, we need to know the
number of possible packages in the system. Provide a helper. Unfortunately a
macro to avoid inclue hell.

Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
 arch/x86/include/asm/topology.h |    3 +++
 1 file changed, 3 insertions(+)

--- a/arch/x86/include/asm/topology.h
+++ b/arch/x86/include/asm/topology.h
@@ -127,6 +127,9 @@ extern const struct cpumask *cpu_coregro
 #define topology_sibling_cpumask(cpu)		(per_cpu(cpu_sibling_map, cpu))
 #endif
 
+#define topology_max_packages()			\
+	DIV_ROUND_UP(num_possible_cpus(), boot_cpu_data.x86_max_cores * smp_num_siblings)
+
 static inline void arch_fix_phys_package_id(int num, u32 slot)
 {
 }