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| author | Kan Liang <kan.liang@linux.intel.com> | 2024-06-14 16:46:25 +0300 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2024-06-17 18:57:56 +0300 |
| commit | c74443d92f68f07c03ae242ced554b749e6c6736 (patch) | |
| tree | f9d66b4c758b79481c84f4f5b6ee34e927b52244 /arch/x86/events/intel/uncore_discovery.h | |
| parent | 0007f39325921351b7860a976a730acbb198b9ca (diff) | |
| download | linux-c74443d92f68f07c03ae242ced554b749e6c6736.tar.xz | |
perf/x86/uncore: Support per PMU cpumask
The cpumask of some uncore units, e.g., CXL uncore units, may be wrong
under some configurations. Perf may access an uncore counter of a
non-existent uncore unit.
The uncore driver assumes that all uncore units are symmetric among
dies. A global cpumask is shared among all uncore PMUs. However, some
CXL uncore units may only be available on some dies.
A per PMU cpumask is introduced to track the CPU mask of this PMU.
The driver searches the unit control RB tree to check whether the PMU is
available on a given die, and updates the per PMU cpumask accordingly.
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Yunying Sun <yunying.sun@intel.com>
Link: https://lore.kernel.org/r/20240614134631.1092359-3-kan.liang@linux.intel.com
Diffstat (limited to 'arch/x86/events/intel/uncore_discovery.h')
| -rw-r--r-- | arch/x86/events/intel/uncore_discovery.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/events/intel/uncore_discovery.h b/arch/x86/events/intel/uncore_discovery.h index 5190017aba51..96265cf1fc86 100644 --- a/arch/x86/events/intel/uncore_discovery.h +++ b/arch/x86/events/intel/uncore_discovery.h @@ -166,3 +166,6 @@ u64 intel_generic_uncore_pci_read_counter(struct intel_uncore_box *box, struct intel_uncore_type ** intel_uncore_generic_init_uncores(enum uncore_access_type type_id, int num_extra); + +int intel_uncore_find_discovery_unit_id(struct rb_root *units, int die, + unsigned int pmu_idx); |