diff options
| author | Gautham R. Shenoy <ego@linux.vnet.ibm.com> | 2020-12-10 16:08:57 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-12-11 00:10:25 +1100 |
| commit | fbd2b672e91d276b9fa5a729e4a823ba29fa2692 (patch) | |
| tree | 7a3cdcc79b02c37da3b13584bac60bcb45ad809e /arch/powerpc/kernel | |
| parent | 1fdc1d6632ff3f6813a2f15b65586bde8fe0f0ba (diff) | |
powerpc/smp: Rename init_thread_group_l1_cache_map() to make it generic
init_thread_group_l1_cache_map() initializes the per-cpu cpumask
thread_group_l1_cache_map with the core-siblings which share L1 cache
with the CPU. Make this function generic to the cache-property (L1 or
L2) and update a suitable mask. This is a preparatory patch for the
next patch where we will introduce discovery of thread-groups that
share L2-cache.
No functional change.
Signed-off-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/1607596739-32439-4-git-send-email-ego@linux.vnet.ibm.com
Diffstat (limited to 'arch/powerpc/kernel')
| -rw-r--r-- | arch/powerpc/kernel/smp.c | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c index f3290d57fea6..9078b5b5d6e4 100644 --- a/arch/powerpc/kernel/smp.c +++ b/arch/powerpc/kernel/smp.c @@ -866,15 +866,18 @@ out: return tg; } -static int init_thread_group_l1_cache_map(int cpu) +static int __init init_thread_group_cache_map(int cpu, int cache_property) { int first_thread = cpu_first_thread_sibling(cpu); int i, cpu_group_start = -1, err = 0; struct thread_groups *tg = NULL; + cpumask_var_t *mask; - tg = get_thread_groups(cpu, THREAD_GROUP_SHARE_L1, - &err); + if (cache_property != THREAD_GROUP_SHARE_L1) + return -EINVAL; + + tg = get_thread_groups(cpu, cache_property, &err); if (!tg) return err; @@ -885,8 +888,8 @@ static int init_thread_group_l1_cache_map(int cpu) return -ENODATA; } - zalloc_cpumask_var_node(&per_cpu(thread_group_l1_cache_map, cpu), - GFP_KERNEL, cpu_to_node(cpu)); + mask = &per_cpu(thread_group_l1_cache_map, cpu); + zalloc_cpumask_var_node(mask, GFP_KERNEL, cpu_to_node(cpu)); for (i = first_thread; i < first_thread + threads_per_core; i++) { int i_group_start = get_cpu_thread_group_start(i, tg); @@ -897,7 +900,7 @@ static int init_thread_group_l1_cache_map(int cpu) } if (i_group_start == cpu_group_start) - cpumask_set_cpu(i, per_cpu(thread_group_l1_cache_map, cpu)); + cpumask_set_cpu(i, *mask); } return 0; @@ -976,7 +979,7 @@ static int init_big_cores(void) int cpu; for_each_possible_cpu(cpu) { - int err = init_thread_group_l1_cache_map(cpu); + int err = init_thread_group_cache_map(cpu, THREAD_GROUP_SHARE_L1); if (err) return err; |