arm64: topology: Support PHYTIUM CPU

hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I4CGER
CVE: NA

---------------------------

Add the support for PHYTIUM topology detect, it's better
use PPTT ACPI table to report the topology, but we can live
with it at now.
Signed-off-by: NHanjun Guo <guohanjun@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>
Reviewed-by: NXie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

arch/arm64/include/asm/cputype.h

@@ -59,6 +59,7 @@
 #define ARM_CPU_IMP_NVIDIA		0x4E
 #define ARM_CPU_IMP_FUJITSU		0x46
 #define ARM_CPU_IMP_HISI		0x48
+#define ARM_CPU_IMP_PHYTIUM		0x70
 
 #define ARM_CPU_PART_AEM_V8		0xD0F
 #define ARM_CPU_PART_FOUNDATION		0xD00

arch/arm64/kernel/topology.c

@@ -53,6 +53,11 @@ void store_cpu_topology(unsigned int cpuid)
 	cpuid_topo->thread_id  = -1;
 	cpuid_topo->core_id    = cpuid;
 	cpuid_topo->package_id = cpu_to_node(cpuid);
+	if (read_cpuid_implementor() == ARM_CPU_IMP_PHYTIUM) {
+		cpuid_topo->thread_id  = 0;
+		cpuid_topo->core_id  = cpuid;
+		cpuid_topo->package_id = 0;
+	}
 
 	pr_debug("CPU%u: cluster %d core %d thread %d mpidr %#016llx\n",
 		 cpuid, cpuid_topo->package_id, cpuid_topo->core_id,