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authorAtish Patra <atish.patra@wdc.com>2019-06-27 22:52:58 +0300
committerPaul Walmsley <paul.walmsley@sifive.com>2019-07-22 19:36:06 +0300
commit60c1b220d8bc6baeaf837cd60f94a331b25c26bc (patch)
treee243571528700fb1c605f80b71c8a9f401fd83c8 /include/linux/arch_topology.h
parent124e46a86580c71e0eee8459c5da7649318118db (diff)
downloadlinux-60c1b220d8bc6baeaf837cd60f94a331b25c26bc.tar.xz
cpu-topology: Move cpu topology code to common code.
Both RISC-V & ARM64 are using cpu-map device tree to describe their cpu topology. It's better to move the relevant code to a common place instead of duplicate code. To: Will Deacon <will.deacon@arm.com> To: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Atish Patra <atish.patra@wdc.com> [Tested on QDF2400] Tested-by: Jeffrey Hugo <jhugo@codeaurora.org> [Tested on Juno and other embedded platforms.] Tested-by: Sudeep Holla <sudeep.holla@arm.com> Reviewed-by: Sudeep Holla <sudeep.holla@arm.com> Acked-by: Will Deacon <will.deacon@arm.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com>
Diffstat (limited to 'include/linux/arch_topology.h')
-rw-r--r--include/linux/arch_topology.h28
1 files changed, 28 insertions, 0 deletions
diff --git a/include/linux/arch_topology.h b/include/linux/arch_topology.h
index 1cfe05ea1d89..ede0ce4623b4 100644
--- a/include/linux/arch_topology.h
+++ b/include/linux/arch_topology.h
@@ -33,4 +33,32 @@ unsigned long topology_get_freq_scale(int cpu)
return per_cpu(freq_scale, cpu);
}
+struct cpu_topology {
+ int thread_id;
+ int core_id;
+ int package_id;
+ int llc_id;
+ cpumask_t thread_sibling;
+ cpumask_t core_sibling;
+ cpumask_t llc_sibling;
+};
+
+#ifdef CONFIG_GENERIC_ARCH_TOPOLOGY
+extern struct cpu_topology cpu_topology[NR_CPUS];
+
+#define topology_physical_package_id(cpu) (cpu_topology[cpu].package_id)
+#define topology_core_id(cpu) (cpu_topology[cpu].core_id)
+#define topology_core_cpumask(cpu) (&cpu_topology[cpu].core_sibling)
+#define topology_sibling_cpumask(cpu) (&cpu_topology[cpu].thread_sibling)
+#define topology_llc_cpumask(cpu) (&cpu_topology[cpu].llc_sibling)
+void init_cpu_topology(void);
+void store_cpu_topology(unsigned int cpuid);
+const struct cpumask *cpu_coregroup_mask(int cpu);
+#endif
+
+#if defined(CONFIG_ARM64) || defined(CONFIG_RISCV)
+void update_siblings_masks(unsigned int cpu);
+#endif
+void remove_cpu_topology(unsigned int cpuid);
+
#endif /* _LINUX_ARCH_TOPOLOGY_H_ */