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Message-Id: <c836939fb740197cb4fe6f7c025cbd91b08c359d.1557177585.git.len.brown@intel.com>
Date: Mon, 6 May 2019 17:26:03 -0400
From: Len Brown <lenb@...nel.org>
To: x86@...nel.org
Cc: linux-kernel@...r.kernel.org, Len Brown <len.brown@...el.com>
Subject: [PATCH 08/22] x86 topology: Define topology_logical_die_id()
From: Len Brown <len.brown@...el.com>
Define topology_logical_die_id() ala
existing topology_logical_package_id()
Tested-by: Zhang Rui <rui.zhang@...el.com>
Signed-off-by: Len Brown <len.brown@...el.com>
---
arch/x86/include/asm/processor.h | 1 +
arch/x86/include/asm/topology.h | 5 ++++
arch/x86/kernel/cpu/common.c | 1 +
arch/x86/kernel/smpboot.c | 45 ++++++++++++++++++++++++++++++++
4 files changed, 52 insertions(+)
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index 5f45488b1a9d..def963d0b805 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -118,6 +118,7 @@ struct cpuinfo_x86 {
/* Core id: */
u16 cpu_core_id;
u16 cpu_die_id;
+ u16 logical_die_id;
/* Index into per_cpu list: */
u16 cpu_index;
u32 microcode;
diff --git a/arch/x86/include/asm/topology.h b/arch/x86/include/asm/topology.h
index 3777dbe9c0ff..9de16b4f6023 100644
--- a/arch/x86/include/asm/topology.h
+++ b/arch/x86/include/asm/topology.h
@@ -106,6 +106,7 @@ extern const struct cpumask *cpu_coregroup_mask(int cpu);
#define topology_logical_package_id(cpu) (cpu_data(cpu).logical_proc_id)
#define topology_physical_package_id(cpu) (cpu_data(cpu).phys_proc_id)
+#define topology_logical_die_id(cpu) (cpu_data(cpu).logical_die_id)
#define topology_die_id(cpu) (cpu_data(cpu).cpu_die_id)
#define topology_core_id(cpu) (cpu_data(cpu).cpu_core_id)
@@ -131,13 +132,17 @@ static inline int topology_max_smt_threads(void)
}
int topology_update_package_map(unsigned int apicid, unsigned int cpu);
+int topology_update_die_map(unsigned int dieid, unsigned int cpu);
int topology_phys_to_logical_pkg(unsigned int pkg);
+int topology_phys_to_logical_die(unsigned int die, unsigned int cpu);
bool topology_is_primary_thread(unsigned int cpu);
bool topology_smt_supported(void);
#else
#define topology_max_packages() (1)
static inline int
topology_update_package_map(unsigned int apicid, unsigned int cpu) { return 0; }
+static inline int
+topology_update_die_map(unsigned int dieid, unsigned int cpu) { return 0; }
static inline int topology_phys_to_logical_pkg(unsigned int pkg) { return 0; }
static inline int topology_phys_to_logical_die(unsigned int die,
unsigned int cpu) { return 0; }
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index cb28e98a0659..24f96c9771af 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -1285,6 +1285,7 @@ static void validate_apic_and_package_id(struct cpuinfo_x86 *c)
cpu, apicid, c->initial_apicid);
}
BUG_ON(topology_update_package_map(c->phys_proc_id, cpu));
+ BUG_ON(topology_update_die_map(c->cpu_die_id, cpu));
#else
c->logical_proc_id = 0;
#endif
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 05f9cfdddffd..a114375e14f7 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -101,6 +101,7 @@ EXPORT_PER_CPU_SYMBOL(cpu_info);
unsigned int __max_logical_packages __read_mostly;
EXPORT_SYMBOL(__max_logical_packages);
static unsigned int logical_packages __read_mostly;
+static unsigned int logical_die __read_mostly;
/* Maximum number of SMT threads on any online core */
int __read_mostly __max_smt_threads = 1;
@@ -302,6 +303,26 @@ int topology_phys_to_logical_pkg(unsigned int phys_pkg)
return -1;
}
EXPORT_SYMBOL(topology_phys_to_logical_pkg);
+/**
+ * topology_phys_to_logical_die - Map a physical die id to logical
+ *
+ * Returns logical die id or -1 if not found
+ */
+int topology_phys_to_logical_die(unsigned int die_id, unsigned int cur_cpu)
+{
+ int cpu;
+ int proc_id = cpu_data(cur_cpu).phys_proc_id;
+
+ for_each_possible_cpu(cpu) {
+ struct cpuinfo_x86 *c = &cpu_data(cpu);
+
+ if (c->initialized && c->cpu_die_id == die_id &&
+ c->phys_proc_id == proc_id)
+ return c->logical_die_id;
+ }
+ return -1;
+}
+EXPORT_SYMBOL(topology_phys_to_logical_die);
/**
* topology_update_package_map - Update the physical to logical package map
@@ -326,6 +347,29 @@ int topology_update_package_map(unsigned int pkg, unsigned int cpu)
cpu_data(cpu).logical_proc_id = new;
return 0;
}
+/**
+ * topology_update_die_map - Update the physical to logical die map
+ * @die: The die id as retrieved via CPUID
+ * @cpu: The cpu for which this is updated
+ */
+int topology_update_die_map(unsigned int die, unsigned int cpu)
+{
+ int new;
+
+ /* Already available somewhere? */
+ new = topology_phys_to_logical_die(die, cpu);
+ if (new >= 0)
+ goto found;
+
+ new = logical_die++;
+ if (new != die) {
+ pr_info("CPU %u Converting physical %u to logical die %u\n",
+ cpu, die, new);
+ }
+found:
+ cpu_data(cpu).logical_die_id = new;
+ return 0;
+}
void __init smp_store_boot_cpu_info(void)
{
@@ -335,6 +379,7 @@ void __init smp_store_boot_cpu_info(void)
*c = boot_cpu_data;
c->cpu_index = id;
topology_update_package_map(c->phys_proc_id, id);
+ topology_update_die_map(c->cpu_die_id, id);
c->initialized = true;
}
--
2.18.0-rc0
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