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arch_topology: Provide a stub topology_core_has_smt() for !CONFIG_GENERIC_ARCH_TOPOLOGY 

The arm_pmu driver is using topology_core_has_smt() for retrieving
the SMT implementation which depends on CONFIG_GENERIC_ARCH_TOPOLOGY.
The config is optional on arm platforms so provide a
!CONFIG_GENERIC_ARCH_TOPOLOGY stub for topology_core_has_smt().

Fixes: c3d78c34ad ("perf: arm_pmuv3: Don't use PMCCNTR_EL0 on SMT cores")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202511041757.vuCGOmFc-lkp@intel.com/
Suggested-by: Will Deacon <will@kernel.org>
Signed-off-by: Yicong Yang <yangyccccc@gmail.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Yicong Yang 2025-11-05 18:38:49 +08:00 committed by Will Deacon
parent 2d7a824807
commit 7ab06ea41a
1 changed files with 5 additions and 1 deletions
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6
include/linux/arch_topology.h
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@ -100,6 +100,10 @@ static inline bool topology_core_has_smt(int cpu)
return cpu_topology[cpu].thread_id != -1;
}
#endif
#else
static inline bool topology_core_has_smt(int cpu) { return false; }
#endif /* CONFIG_GENERIC_ARCH_TOPOLOGY */
#endif /* _LINUX_ARCH_TOPOLOGY_H_ */