Re: [PATCH v5 7/9] arm64: Topology, rename cluster_id
From: Jeremy Linton
Date: Fri Dec 15 2017 - 11:36:43 EST
Hi,
On 12/13/2017 12:02 PM, Lorenzo Pieralisi wrote:
[+Morten, Dietmar]
$SUBJECT should be:
arm64: topology: rename cluster_id
Sure..
On Fri, Dec 01, 2017 at 04:23:28PM -0600, Jeremy Linton wrote:
Lets match the name of the arm64 topology field
to the kernel macro that uses it.
Signed-off-by: Jeremy Linton <jeremy.linton@xxxxxxx>
---
arch/arm64/include/asm/topology.h | 4 ++--
arch/arm64/kernel/topology.c | 27 ++++++++++++++-------------
2 files changed, 16 insertions(+), 15 deletions(-)
diff --git a/arch/arm64/include/asm/topology.h b/arch/arm64/include/asm/topology.h
index c4f2d50491eb..118136268f66 100644
--- a/arch/arm64/include/asm/topology.h
+++ b/arch/arm64/include/asm/topology.h
@@ -7,14 +7,14 @@
struct cpu_topology {
int thread_id;
int core_id;
- int cluster_id;
+ int physical_id;
package_id ?
Given the macro is topology_physical_package_id, either makes sense to
me. <shrug> I will change it in the next set.
It has been debated before, I know. Should we keep the cluster_id too
(even if it would be 1:1 mapped to package_id - for now) ?
Well given that this patch replaces the patch that did that at your
request..
I was hoping someone else would comment here, but my take at this point
is that it doesn't really matter in a functional sense at the moment.
Like the chiplet discussion it can be the subject of a future patch
along with the patches which tweak the scheduler to understand the split.
BTW, given that i'm OoO next week, and the following that are the
holidays, I don't intend to repost this for a couple weeks. I don't
think there are any issues with this set.
There is also arch/arm to take into account, again, this patch is
just renaming (as it should have named since the beginning) a
topology level but we should consider everything from a legacy
perspective.
Lorenzo
cpumask_t thread_sibling;
cpumask_t core_sibling;
};
extern struct cpu_topology cpu_topology[NR_CPUS];
-#define topology_physical_package_id(cpu) (cpu_topology[cpu].cluster_id)
+#define topology_physical_package_id(cpu) (cpu_topology[cpu].physical_id)
#define topology_core_id(cpu) (cpu_topology[cpu].core_id)
#define topology_core_cpumask(cpu) (&cpu_topology[cpu].core_sibling)
#define topology_sibling_cpumask(cpu) (&cpu_topology[cpu].thread_sibling)
diff --git a/arch/arm64/kernel/topology.c b/arch/arm64/kernel/topology.c
index 8d48b233e6ce..74a8a5173a35 100644
--- a/arch/arm64/kernel/topology.c
+++ b/arch/arm64/kernel/topology.c
@@ -51,7 +51,7 @@ static int __init get_cpu_for_node(struct device_node *node)
return -1;
}
-static int __init parse_core(struct device_node *core, int cluster_id,
+static int __init parse_core(struct device_node *core, int physical_id,
int core_id)
{
char name[10];
@@ -67,7 +67,7 @@ static int __init parse_core(struct device_node *core, int cluster_id,
leaf = false;
cpu = get_cpu_for_node(t);
if (cpu >= 0) {
- cpu_topology[cpu].cluster_id = cluster_id;
+ cpu_topology[cpu].physical_id = physical_id;
cpu_topology[cpu].core_id = core_id;
cpu_topology[cpu].thread_id = i;
} else {
@@ -89,7 +89,7 @@ static int __init parse_core(struct device_node *core, int cluster_id,
return -EINVAL;
}
- cpu_topology[cpu].cluster_id = cluster_id;
+ cpu_topology[cpu].physical_id = physical_id;
cpu_topology[cpu].core_id = core_id;
} else if (leaf) {
pr_err("%pOF: Can't get CPU for leaf core\n", core);
@@ -105,7 +105,7 @@ static int __init parse_cluster(struct device_node *cluster, int depth)
bool leaf = true;
bool has_cores = false;
struct device_node *c;
- static int cluster_id __initdata;
+ static int physical_id __initdata;
int core_id = 0;
int i, ret;
@@ -144,7 +144,7 @@ static int __init parse_cluster(struct device_node *cluster, int depth)
}
if (leaf) {
- ret = parse_core(c, cluster_id, core_id++);
+ ret = parse_core(c, physical_id, core_id++);
} else {
pr_err("%pOF: Non-leaf cluster with core %s\n",
cluster, name);
@@ -162,7 +162,7 @@ static int __init parse_cluster(struct device_node *cluster, int depth)
pr_warn("%pOF: empty cluster\n", cluster);
if (leaf)
- cluster_id++;
+ physical_id++;
return 0;
}
@@ -198,7 +198,7 @@ static int __init parse_dt_topology(void)
* only mark cores described in the DT as possible.
*/
for_each_possible_cpu(cpu)
- if (cpu_topology[cpu].cluster_id == -1)
+ if (cpu_topology[cpu].physical_id == -1)
ret = -EINVAL;
out_map:
@@ -228,7 +228,7 @@ static void update_siblings_masks(unsigned int cpuid)
for_each_possible_cpu(cpu) {
cpu_topo = &cpu_topology[cpu];
- if (cpuid_topo->cluster_id != cpu_topo->cluster_id)
+ if (cpuid_topo->physical_id != cpu_topo->physical_id)
continue;
cpumask_set_cpu(cpuid, &cpu_topo->core_sibling);
@@ -249,7 +249,7 @@ void store_cpu_topology(unsigned int cpuid)
struct cpu_topology *cpuid_topo = &cpu_topology[cpuid];
u64 mpidr;
- if (cpuid_topo->cluster_id != -1)
+ if (cpuid_topo->physical_id != -1)
goto topology_populated;
mpidr = read_cpuid_mpidr();
@@ -263,19 +263,19 @@ void store_cpu_topology(unsigned int cpuid)
/* Multiprocessor system : Multi-threads per core */
cpuid_topo->thread_id = MPIDR_AFFINITY_LEVEL(mpidr, 0);
cpuid_topo->core_id = MPIDR_AFFINITY_LEVEL(mpidr, 1);
- cpuid_topo->cluster_id = MPIDR_AFFINITY_LEVEL(mpidr, 2) |
+ cpuid_topo->physical_id = MPIDR_AFFINITY_LEVEL(mpidr, 2) |
MPIDR_AFFINITY_LEVEL(mpidr, 3) << 8;
} else {
/* Multiprocessor system : Single-thread per core */
cpuid_topo->thread_id = -1;
cpuid_topo->core_id = MPIDR_AFFINITY_LEVEL(mpidr, 0);
- cpuid_topo->cluster_id = MPIDR_AFFINITY_LEVEL(mpidr, 1) |
+ cpuid_topo->physical_id = MPIDR_AFFINITY_LEVEL(mpidr, 1) |
MPIDR_AFFINITY_LEVEL(mpidr, 2) << 8 |
MPIDR_AFFINITY_LEVEL(mpidr, 3) << 16;
}
pr_debug("CPU%u: cluster %d core %d thread %d mpidr %#016llx\n",
- cpuid, cpuid_topo->cluster_id, cpuid_topo->core_id,
+ cpuid, cpuid_topo->physical_id, cpuid_topo->core_id,
cpuid_topo->thread_id, mpidr);
topology_populated:
@@ -291,7 +291,7 @@ static void __init reset_cpu_topology(void)
cpu_topo->thread_id = -1;
cpu_topo->core_id = 0;
- cpu_topo->cluster_id = -1;
+ cpu_topo->physical_id = -1;
cpumask_clear(&cpu_topo->core_sibling);
cpumask_set_cpu(cpu, &cpu_topo->core_sibling);
@@ -300,6 +300,7 @@ static void __init reset_cpu_topology(void)
}
}
+
void __init init_cpu_topology(void)
{
reset_cpu_topology();
--
2.13.5