From 31b46035576d405ca9a98be95945986c91986368 Mon Sep 17 00:00:00 2001 From: Sudeep Holla Date: Fri, 6 Jul 2018 12:02:42 +0100 Subject: [PATCH] arm64: topology: refactor reset_cpu_topology to add support for removing topology Currently reset_cpu_topology clears all the CPU topology information and resets to default values. However we may need to just clear the information when we hotplug out the CPU. In preparation to add the support the same, let's refactor reset_cpu_topology to just reset the information and move clearing out the topology information to clear_cpu_topology. Cc: Catalin Marinas Cc: Will Deacon Tested-by: Ganapatrao Kulkarni Tested-by: Hanjun Guo Signed-off-by: Sudeep Holla Signed-off-by: Will Deacon --- arch/arm64/kernel/topology.c | 21 ++++++++++++++------- 1 file changed, 14 insertions(+), 7 deletions(-) diff --git a/arch/arm64/kernel/topology.c b/arch/arm64/kernel/topology.c index f845a86..b64733c5e 100644 --- a/arch/arm64/kernel/topology.c +++ b/arch/arm64/kernel/topology.c @@ -293,6 +293,19 @@ topology_populated: update_siblings_masks(cpuid); } +static void clear_cpu_topology(int cpu) +{ + struct cpu_topology *cpu_topo = &cpu_topology[cpu]; + + cpumask_clear(&cpu_topo->llc_siblings); + cpumask_set_cpu(cpu, &cpu_topo->llc_siblings); + + cpumask_clear(&cpu_topo->core_sibling); + cpumask_set_cpu(cpu, &cpu_topo->core_sibling); + cpumask_clear(&cpu_topo->thread_sibling); + cpumask_set_cpu(cpu, &cpu_topo->thread_sibling); +} + static void __init reset_cpu_topology(void) { unsigned int cpu; @@ -303,15 +316,9 @@ static void __init reset_cpu_topology(void) cpu_topo->thread_id = -1; cpu_topo->core_id = 0; cpu_topo->package_id = -1; - cpu_topo->llc_id = -1; - cpumask_clear(&cpu_topo->llc_siblings); - cpumask_set_cpu(cpu, &cpu_topo->llc_siblings); - cpumask_clear(&cpu_topo->core_sibling); - cpumask_set_cpu(cpu, &cpu_topo->core_sibling); - cpumask_clear(&cpu_topo->thread_sibling); - cpumask_set_cpu(cpu, &cpu_topo->thread_sibling); + clear_cpu_topology(cpu); } } -- 2.7.4