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| author | Len Brown <len.brown@intel.com> | 2019-05-13 20:58:47 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2019-05-23 11:08:31 +0300 |
| commit | 0e344d8c709fe01d882fc0fb5452bedfe5eba67a (patch) | |
| tree | aab6ea8d855d83e6e171fb3806a88109c0bdee40 | |
| parent | 14d96d6c06b5d8116b8d52c9c5530f5528ef1e61 (diff) | |
| download | linux-0e344d8c709fe01d882fc0fb5452bedfe5eba67a.tar.xz | |
cpu/topology: Export die_id
Export die_id in cpu topology, for the benefit of hardware that has
multiple-die/package.
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: linux-doc@vger.kernel.org
Link: https://lkml.kernel.org/r/e7d1caaf4fbd24ee40db6d557ab28d7d83298900.1557769318.git.len.brown@intel.com
| -rw-r--r-- | Documentation/cputopology.txt | 15 | ||||
| -rw-r--r-- | drivers/base/topology.c | 4 | ||||
| -rw-r--r-- | include/linux/topology.h | 3 |
3 files changed, 19 insertions, 3 deletions
diff --git a/Documentation/cputopology.txt b/Documentation/cputopology.txt index cb61277e2308..2ff8a1e9a2db 100644 --- a/Documentation/cputopology.txt +++ b/Documentation/cputopology.txt @@ -12,6 +12,12 @@ physical_package_id: socket number, but the actual value is architecture and platform dependent. +die_id: + + the CPU die ID of cpuX. Typically it is the hardware platform's + identifier (rather than the kernel's). The actual value is + architecture and platform dependent. + core_id: the CPU core ID of cpuX. Typically it is the hardware platform's @@ -81,6 +87,7 @@ For an architecture to support this feature, it must define some of these macros in include/asm-XXX/topology.h:: #define topology_physical_package_id(cpu) + #define topology_die_id(cpu) #define topology_core_id(cpu) #define topology_book_id(cpu) #define topology_drawer_id(cpu) @@ -99,9 +106,11 @@ provides default definitions for any of the above macros that are not defined by include/asm-XXX/topology.h: 1) topology_physical_package_id: -1 -2) topology_core_id: 0 -3) topology_sibling_cpumask: just the given CPU -4) topology_core_cpumask: just the given CPU +2) topology_die_id: -1 +3) topology_core_id: 0 +4) topology_sibling_cpumask: just the given CPU +5) topology_core_cpumask: just the given CPU +6) topology_die_cpumask: just the given CPU For architectures that don't support books (CONFIG_SCHED_BOOK) there are no default definitions for topology_book_id() and topology_book_cpumask(). diff --git a/drivers/base/topology.c b/drivers/base/topology.c index 5fd9f167ecc1..50352cf96f85 100644 --- a/drivers/base/topology.c +++ b/drivers/base/topology.c @@ -43,6 +43,9 @@ static ssize_t name##_list_show(struct device *dev, \ define_id_show_func(physical_package_id); static DEVICE_ATTR_RO(physical_package_id); +define_id_show_func(die_id); +static DEVICE_ATTR_RO(die_id); + define_id_show_func(core_id); static DEVICE_ATTR_RO(core_id); @@ -72,6 +75,7 @@ static DEVICE_ATTR_RO(drawer_siblings_list); static struct attribute *default_attrs[] = { &dev_attr_physical_package_id.attr, + &dev_attr_die_id.attr, &dev_attr_core_id.attr, &dev_attr_thread_siblings.attr, &dev_attr_thread_siblings_list.attr, diff --git a/include/linux/topology.h b/include/linux/topology.h index cb0775e1ee4b..5cc8595dd0e4 100644 --- a/include/linux/topology.h +++ b/include/linux/topology.h @@ -184,6 +184,9 @@ static inline int cpu_to_mem(int cpu) #ifndef topology_physical_package_id #define topology_physical_package_id(cpu) ((void)(cpu), -1) #endif +#ifndef topology_die_id +#define topology_die_id(cpu) ((void)(cpu), -1) +#endif #ifndef topology_core_id #define topology_core_id(cpu) ((void)(cpu), 0) #endif |