diff --git a/arch/x86/kernel/cpu/topology_amd.c b/arch/x86/kernel/cpu/topology_amd.c index 1a8b3ad493af..6bc44ab32dc4 100644 --- a/arch/x86/kernel/cpu/topology_amd.c +++ b/arch/x86/kernel/cpu/topology_amd.c @@ -48,7 +48,7 @@ static void store_node(struct topo_scan *tscan, unsigned int nr_nodes, u16 node_ tscan->amd_node_id = node_id; } -static bool parse_8000_001e(struct topo_scan *tscan, bool has_0xb) +static bool parse_8000_001e(struct topo_scan *tscan, bool has_topoext) { struct { // eax @@ -78,7 +78,7 @@ static bool parse_8000_001e(struct topo_scan *tscan, bool has_0xb) * topology_set_dom() would propagate and overwrite the already * propagated CORE level. */ - if (!has_0xb) { + if (!has_topoext) { unsigned int nthreads = leaf.core_nthreads + 1; topology_update_dom(tscan, TOPO_SMT_DOMAIN, get_count_order(nthreads), nthreads); @@ -137,21 +137,24 @@ static void legacy_set_llc(struct topo_scan *tscan) static void parse_topology_amd(struct topo_scan *tscan) { - bool has_0xb = false; + bool has_topoext = false; /* * If the extended topology leaf 0x8000_001e is available - * try to get SMT and CORE shift from leaf 0xb first, then - * try to get the CORE shift from leaf 0x8000_0008. + * try to get SMT, CORE, TILE, and DIE shifts from extended + * CPUID leaf 0x8000_0026 on supported processors first. If + * extended CPUID leaf 0x8000_0026 is not supported, try to + * get SMT and CORE shift from leaf 0xb first, then try to + * get the CORE shift from leaf 0x8000_0008. */ if (cpu_feature_enabled(X86_FEATURE_TOPOEXT)) - has_0xb = cpu_parse_topology_ext(tscan); + has_topoext = cpu_parse_topology_ext(tscan); - if (!has_0xb && !parse_8000_0008(tscan)) + if (!has_topoext && !parse_8000_0008(tscan)) return; /* Prefer leaf 0x8000001e if available */ - if (parse_8000_001e(tscan, has_0xb)) + if (parse_8000_001e(tscan, has_topoext)) return; /* Try the NODEID MSR */ diff --git a/arch/x86/kernel/cpu/topology_ext.c b/arch/x86/kernel/cpu/topology_ext.c index e477228cd5b2..467b0326bf1a 100644 --- a/arch/x86/kernel/cpu/topology_ext.c +++ b/arch/x86/kernel/cpu/topology_ext.c @@ -13,7 +13,10 @@ enum topo_types { CORE_TYPE = 2, MAX_TYPE_0B = 3, MODULE_TYPE = 3, + AMD_CCD_TYPE = 3, TILE_TYPE = 4, + AMD_SOCKET_TYPE = 4, + MAX_TYPE_80000026 = 5, DIE_TYPE = 5, DIEGRP_TYPE = 6, MAX_TYPE_1F = 7, @@ -32,6 +35,13 @@ static const unsigned int topo_domain_map_0b_1f[MAX_TYPE_1F] = { [DIEGRP_TYPE] = TOPO_DIEGRP_DOMAIN, }; +static const unsigned int topo_domain_map_80000026[MAX_TYPE_80000026] = { + [SMT_TYPE] = TOPO_SMT_DOMAIN, + [CORE_TYPE] = TOPO_CORE_DOMAIN, + [AMD_CCD_TYPE] = TOPO_TILE_DOMAIN, + [AMD_SOCKET_TYPE] = TOPO_DIE_DOMAIN, +}; + static inline bool topo_subleaf(struct topo_scan *tscan, u32 leaf, u32 subleaf, unsigned int *last_dom) { @@ -56,6 +66,7 @@ static inline bool topo_subleaf(struct topo_scan *tscan, u32 leaf, u32 subleaf, switch (leaf) { case 0x0b: maxtype = MAX_TYPE_0B; map = topo_domain_map_0b_1f; break; case 0x1f: maxtype = MAX_TYPE_1F; map = topo_domain_map_0b_1f; break; + case 0x80000026: maxtype = MAX_TYPE_80000026; map = topo_domain_map_80000026; break; default: return false; } @@ -125,6 +136,10 @@ bool cpu_parse_topology_ext(struct topo_scan *tscan) if (tscan->c->cpuid_level >= 0x1f && parse_topology_leaf(tscan, 0x1f)) return true; + /* AMD: Try leaf 0x80000026 first. */ + if (tscan->c->extended_cpuid_level >= 0x80000026 && parse_topology_leaf(tscan, 0x80000026)) + return true; + /* Intel/AMD: Fall back to leaf 0xB if available */ return tscan->c->cpuid_level >= 0x0b && parse_topology_leaf(tscan, 0x0b); }