Release 4.14 arch/powerpc/include/asm/cputhreads.h
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_POWERPC_CPUTHREADS_H
#define _ASM_POWERPC_CPUTHREADS_H
#ifndef __ASSEMBLY__
#include <linux/cpumask.h>
#include <asm/cpu_has_feature.h>
/*
* Mapping of threads to cores
*
* Note: This implementation is limited to a power of 2 number of
* threads per core and the same number for each core in the system
* (though it would work if some processors had less threads as long
* as the CPU numbers are still allocated, just not brought online).
*
* However, the API allows for a different implementation in the future
* if needed, as long as you only use the functions and not the variables
* directly.
*/
#ifdef CONFIG_SMP
extern int threads_per_core;
extern int threads_per_subcore;
extern int threads_shift;
extern cpumask_t threads_core_mask;
#else
#define threads_per_core 1
#define threads_per_subcore 1
#define threads_shift 0
#define threads_core_mask (*get_cpu_mask(0))
#endif
/* cpu_thread_mask_to_cores - Return a cpumask of one per cores
* hit by the argument
*
* @threads: a cpumask of online threads
*
* This function returns a cpumask which will have one online cpu's
* bit set for each core that has at least one thread set in the argument.
*
* This can typically be used for things like IPI for tlb invalidations
* since those need to be done only once per core/TLB
*/
static inline cpumask_t cpu_thread_mask_to_cores(const struct cpumask *threads)
{
cpumask_t tmp, res;
int i, cpu;
cpumask_clear(&res);
for (i = 0; i < NR_CPUS; i += threads_per_core) {
cpumask_shift_left(&tmp, &threads_core_mask, i);
if (cpumask_intersects(threads, &tmp)) {
cpu = cpumask_next_and(-1, &tmp, cpu_online_mask);
if (cpu < nr_cpu_ids)
cpumask_set_cpu(cpu, &res);
}
}
return res;
}
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| Motohiro Kosaki | 15 | 15.31% | 1 | 33.33% |
| Total | 98 | 100.00% | 3 | 100.00% |
static inline int cpu_nr_cores(void)
{
return nr_cpu_ids >> threads_shift;
}
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| Benjamin Herrenschmidt | 13 | 92.86% | 1 | 50.00% |
| Jan Stancek | 1 | 7.14% | 1 | 50.00% |
| Total | 14 | 100.00% | 2 | 100.00% |
static inline cpumask_t cpu_online_cores_map(void)
{
return cpu_thread_mask_to_cores(cpu_online_mask);
}
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| Benjamin Herrenschmidt | 14 | 93.33% | 1 | 50.00% |
| Motohiro Kosaki | 1 | 6.67% | 1 | 50.00% |
| Total | 15 | 100.00% | 2 | 100.00% |
#ifdef CONFIG_SMP
int cpu_core_index_of_thread(int cpu);
int cpu_first_thread_of_core(int core);
#else
static inline int cpu_core_index_of_thread(int cpu) { return cpu; }
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| Total | 13 | 100.00% | 2 | 100.00% |
static inline int cpu_first_thread_of_core(int core) { return core; }
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#endif
static inline int cpu_thread_in_core(int cpu)
{
return cpu & (threads_per_core - 1);
}
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| Benjamin Herrenschmidt | 19 | 100.00% | 1 | 100.00% |
| Total | 19 | 100.00% | 1 | 100.00% |
static inline int cpu_thread_in_subcore(int cpu)
{
return cpu & (threads_per_subcore - 1);
}
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| Michael Ellerman | 19 | 100.00% | 1 | 100.00% |
| Total | 19 | 100.00% | 1 | 100.00% |
static inline int cpu_first_thread_sibling(int cpu)
{
return cpu & ~(threads_per_core - 1);
}
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| Benjamin Herrenschmidt | 19 | 95.00% | 1 | 50.00% |
| Vaidyanathan Srinivasan | 1 | 5.00% | 1 | 50.00% |
| Total | 20 | 100.00% | 2 | 100.00% |
static inline int cpu_last_thread_sibling(int cpu)
{
return cpu | (threads_per_core - 1);
}
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| Benjamin Herrenschmidt | 18 | 94.74% | 1 | 50.00% |
| Vaidyanathan Srinivasan | 1 | 5.26% | 1 | 50.00% |
| Total | 19 | 100.00% | 2 | 100.00% |
static inline u32 get_tensr(void)
{
#ifdef CONFIG_BOOKE
if (cpu_has_feature(CPU_FTR_SMT))
return mfspr(SPRN_TENSR);
#endif
return 1;
}
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| Chen-Hui Zhao | 30 | 100.00% | 1 | 100.00% |
| Total | 30 | 100.00% | 1 | 100.00% |
void book3e_start_thread(int thread, unsigned long addr);
void book3e_stop_thread(int thread);
#endif /* __ASSEMBLY__ */
#define INVALID_THREAD_HWID 0x0fff
#endif /* _ASM_POWERPC_CPUTHREADS_H */
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| Benjamin Herrenschmidt | 196 | 53.55% | 2 | 14.29% |
| Chen-Hui Zhao | 58 | 15.85% | 3 | 21.43% |
| Vaidyanathan Srinivasan | 37 | 10.11% | 1 | 7.14% |
| Michael Ellerman | 27 | 7.38% | 1 | 7.14% |
| Shreyas B. Prabhu | 25 | 6.83% | 1 | 7.14% |
| Motohiro Kosaki | 16 | 4.37% | 1 | 7.14% |
| Guenter Roeck | 3 | 0.82% | 1 | 7.14% |
| Anshuman Khandual | 1 | 0.27% | 1 | 7.14% |
| Greg Kroah-Hartman | 1 | 0.27% | 1 | 7.14% |
| Rusty Russell | 1 | 0.27% | 1 | 7.14% |
| Jan Stancek | 1 | 0.27% | 1 | 7.14% |
| Total | 366 | 100.00% | 14 | 100.00% |
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