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| author |   Len Brown <len.brown@intel.com> | 2019-05-13 13:58:49 -0400 |
|---|---|---|
| committer |   Thomas Gleixner <tglx@linutronix.de> | 2019-05-23 10:08:32 +0200 |
| commit | 212bf4fdb7f9eeeb99afd97ebad677d43e7b55ac (patch) | |
| tree | 017c22ea182b23cae469a00745c5c2a1398658c2 /arch/x86/kernel | |
| parent | x86/topology: Define topology_die_id() (diff) | |
| download | linux-dev-212bf4fdb7f9eeeb99afd97ebad677d43e7b55ac.tar.xz linux-dev-212bf4fdb7f9eeeb99afd97ebad677d43e7b55ac.zip | |
x86/topology: Define topology_logical_die_id()
Define topology_logical_die_id() ala existing topology_logical_package_id()
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Zhang Rui <rui.zhang@intel.com>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/2f3526e25ae14fbeff26fb26e877d159df8946d9.1557769318.git.len.brown@intel.com
Diffstat (limited to 'arch/x86/kernel')
| -rw-r--r-- | arch/x86/kernel/cpu/common.c | 1 | ||||
| -rw-r--r-- | arch/x86/kernel/smpboot.c | 45 |
2 files changed, 46 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c index d7f55ad2dfb1..8cdca1223b0f 100644 --- a/arch/x86/kernel/cpu/common.c +++ b/arch/x86/kernel/cpu/common.c @@ -1298,6 +1298,7 @@ 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 40ffe23249c0..a6e01b6c2709 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 @@ found: 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; } |