1 files changed, 29 insertions, 2 deletions

diff --git a/arch/x86/kernel/cpu/cacheinfo.c b/arch/x86/kernel/cpu/cacheinfo.c
index 0c5fcbd..dc1b934 100644
--- a/arch/x86/kernel/cpu/cacheinfo.c
+++ b/arch/x86/kernel/cpu/cacheinfo.c
@@ -602,6 +602,10 @@ cpuid4_cache_lookup_regs(int index, struct _cpuid4_info_regs *this_leaf)
 		else
 			amd_cpuid4(index, &eax, &ebx, &ecx);
 		amd_init_l3_cache(this_leaf, index);
+	} else if (boot_cpu_data.x86_vendor == X86_VENDOR_HYGON) {
+		cpuid_count(0x8000001d, index, &eax.full,
+			    &ebx.full, &ecx.full, &edx);
+		amd_init_l3_cache(this_leaf, index);
 	} else {
 		cpuid_count(4, index, &eax.full, &ebx.full, &ecx.full, &edx);
 	}
@@ -625,7 +629,8 @@ static int find_num_cache_leaves(struct cpuinfo_x86 *c)
 	union _cpuid4_leaf_eax	cache_eax;
 	int 			i = -1;
 
-	if (c->x86_vendor == X86_VENDOR_AMD)
+	if (c->x86_vendor == X86_VENDOR_AMD ||
+	    c->x86_vendor == X86_VENDOR_HYGON)
 		op = 0x8000001d;
 	else
 		op = 4;
@@ -678,6 +683,22 @@ void cacheinfo_amd_init_llc_id(struct cpuinfo_x86 *c, int cpu, u8 node_id)
 	}
 }
 
+void cacheinfo_hygon_init_llc_id(struct cpuinfo_x86 *c, int cpu, u8 node_id)
+{
+	/*
+	 * We may have multiple LLCs if L3 caches exist, so check if we
+	 * have an L3 cache by looking at the L3 cache CPUID leaf.
+	 */
+	if (!cpuid_edx(0x80000006))
+		return;
+
+	/*
+	 * LLC is at the core complex level.
+	 * Core complex ID is ApicId[3] for these processors.
+	 */
+	per_cpu(cpu_llc_id, cpu) = c->apicid >> 3;
+}
+
 void init_amd_cacheinfo(struct cpuinfo_x86 *c)
 {
 
@@ -691,6 +712,11 @@ void init_amd_cacheinfo(struct cpuinfo_x86 *c)
 	}
 }
 
+void init_hygon_cacheinfo(struct cpuinfo_x86 *c)
+{
+	num_cache_leaves = find_num_cache_leaves(c);
+}
+
 void init_intel_cacheinfo(struct cpuinfo_x86 *c)
 {
 	/* Cache sizes */
@@ -913,7 +939,8 @@ static void __cache_cpumap_setup(unsigned int cpu, int index,
 	int index_msb, i;
 	struct cpuinfo_x86 *c = &cpu_data(cpu);
 
-	if (c->x86_vendor == X86_VENDOR_AMD) {
+	if (c->x86_vendor == X86_VENDOR_AMD ||
+	    c->x86_vendor == X86_VENDOR_HYGON) {
 		if (__cache_amd_cpumap_setup(cpu, index, base))
 			return;
 	}