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| author | Michael Ellerman <mpe@ellerman.id.au> | 2024-02-15 00:14:05 +1100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2024-02-15 00:14:05 +1100 |
| commit | 9832de654499f0bf797a3719c4d4c5bd401f18f5 (patch) | |
| tree | ea776e1a12bfbed429aa09d9d0e9d5b8eed4ab9c /arch/powerpc/kernel | |
| parent | dca79603fbc592ec7ea8bd7ba274052d3984e882 (diff) | |
| download | linux-stable-9832de654499f0bf797a3719c4d4c5bd401f18f5.tar.gz linux-stable-9832de654499f0bf797a3719c4d4c5bd401f18f5.tar.bz2 linux-stable-9832de654499f0bf797a3719c4d4c5bd401f18f5.zip | |
powerpc/smp: Factor out assign_threads()
Factor out the for loop that assigns CPU numbers to threads of a core.
The function takes the next CPU number to use as input, and returns the
next available CPU number after the threads has been assigned.
This will allow a subsequent change to assign threads out of order.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20231229120107.2281153-4-mpe@ellerman.id.au
Diffstat (limited to 'arch/powerpc/kernel')
| -rw-r--r-- | arch/powerpc/kernel/setup-common.c | 32 |
1 files changed, 21 insertions, 11 deletions
diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c index 375bade1cf09..a5aab5a79545 100644 --- a/arch/powerpc/kernel/setup-common.c +++ b/arch/powerpc/kernel/setup-common.c @@ -411,6 +411,25 @@ static void __init cpu_init_thread_core_maps(int tpc) u32 *cpu_to_phys_id = NULL; +static int assign_threads(unsigned int cpu, unsigned int nthreads, bool present, + const __be32 *hw_ids) +{ + for (int i = 0; i < nthreads && cpu < nr_cpu_ids; i++) { + __be32 hwid; + + hwid = be32_to_cpu(hw_ids[i]); + + DBG(" thread %d -> cpu %d (hard id %d)\n", i, cpu, hwid); + + set_cpu_present(cpu, present); + set_cpu_possible(cpu, true); + cpu_to_phys_id[cpu] = hwid; + cpu++; + } + + return cpu; +} + /** * setup_cpu_maps - initialize the following cpu maps: * cpu_possible_mask @@ -446,7 +465,7 @@ void __init smp_setup_cpu_maps(void) for_each_node_by_type(dn, "cpu") { const __be32 *intserv; __be32 cpu_be; - int j, len; + int len; DBG(" * %pOF...\n", dn); @@ -473,16 +492,7 @@ void __init smp_setup_cpu_maps(void) avail = !of_property_match_string(dn, "enable-method", "spin-table"); - for (j = 0; j < nthreads && cpu < nr_cpu_ids; j++) { - - DBG(" thread %d -> cpu %d (hard id %d)\n", - j, cpu, be32_to_cpu(intserv[j])); - - set_cpu_present(cpu, avail); - set_cpu_possible(cpu, true); - cpu_to_phys_id[cpu] = be32_to_cpu(intserv[j]); - cpu++; - } + cpu = assign_threads(cpu, nthreads, avail, intserv); if (cpu >= nr_cpu_ids) { of_node_put(dn); |