Re: [PATCH v6 6/6] powerpc/pseries: Consolidate form1 distance initialization into a helper
On Fri, Aug 06, 2021 at 09:53:59PM +0530, Aneesh Kumar K.V wrote: > On 8/6/21 12:17 PM, David Gibson wrote: > > On Tue, Jul 27, 2021 at 03:33:11PM +0530, Aneesh Kumar K.V wrote: > > > Currently, we duplicate parsing code for ibm,associativity and > > > ibm,associativity-lookup-arrays in the kernel. The associativity array > > > provided > > > by these device tree properties are very similar and hence can use > > > a helper to parse the node id and numa distance details. > > > > Oh... sorry.. comments on the earlier patch were from before I read > > and saw you adjusted things here. > > > > > > > > Signed-off-by: Aneesh Kumar K.V > > > --- > > > arch/powerpc/mm/numa.c | 83 ++ > > > 1 file changed, 51 insertions(+), 32 deletions(-) > > > > > > diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c > > > index fffb3c40f595..7506251e17f2 100644 > > > --- a/arch/powerpc/mm/numa.c > > > +++ b/arch/powerpc/mm/numa.c > > > @@ -171,19 +171,19 @@ static void unmap_cpu_from_node(unsigned long cpu) > > > } > > > #endif /* CONFIG_HOTPLUG_CPU || CONFIG_PPC_SPLPAR */ > > > -/* > > > - * Returns nid in the range [0..nr_node_ids], or -1 if no useful NUMA > > > - * info is found. > > > - */ > > > -static int associativity_to_nid(const __be32 *associativity) > > > +static int __associativity_to_nid(const __be32 *associativity, > > > + int max_array_sz) > > > { > > > int nid = NUMA_NO_NODE; > > > + /* > > > + * primary_domain_index is 1 based array index. > > > + */ > > > + int index = primary_domain_index - 1; > > > - if (!numa_enabled) > > > + if (!numa_enabled || index >= max_array_sz) > > > goto out; > > > > You don't need a goto, you can just return NUMA_NO_NODE. > > updated > > > > > > - if (of_read_number(associativity, 1) >= primary_domain_index) > > > - nid = of_read_number(&associativity[primary_domain_index], 1); > > > + nid = of_read_number(&associativity[index], 1); > > > /* POWER4 LPAR uses 0x as invalid node */ > > > if (nid == 0x || nid >= nr_node_ids) > > > @@ -191,6 +191,17 @@ static int associativity_to_nid(const __be32 > > > *associativity) > > > out: > > > return nid; > > > } > > > +/* > > > + * Returns nid in the range [0..nr_node_ids], or -1 if no useful NUMA > > > + * info is found. > > > + */ > > > +static int associativity_to_nid(const __be32 *associativity) > > > +{ > > > + int array_sz = of_read_number(associativity, 1); > > > + > > > + /* Skip the first element in the associativity array */ > > > + return __associativity_to_nid((associativity + 1), array_sz); > > > +} > > > static int __cpu_form2_relative_distance(__be32 *cpu1_assoc, __be32 > > > *cpu2_assoc) > > > { > > > @@ -295,24 +306,41 @@ int of_node_to_nid(struct device_node *device) > > > } > > > EXPORT_SYMBOL(of_node_to_nid); > > > -static void __initialize_form1_numa_distance(const __be32 *associativity) > > > +static void ___initialize_form1_numa_distance(const __be32 > > > *associativity, > > > + int max_array_sz) > > > { > > > int i, nid; > > > if (affinity_form != FORM1_AFFINITY) > > > return; > > > - nid = associativity_to_nid(associativity); > > > + nid = __associativity_to_nid(associativity, max_array_sz); > > > if (nid != NUMA_NO_NODE) { > > > for (i = 0; i < distance_ref_points_depth; i++) { > > > const __be32 *entry; > > > + int index = be32_to_cpu(distance_ref_points[i]) - 1; > > > + > > > + /* > > > + * broken hierarchy, return with broken distance table > > > > WARN_ON, maybe? > > > updated > > > > > > + */ > > > + if (index >= max_array_sz) > > > + return; > > > - entry = > > > &associativity[be32_to_cpu(distance_ref_points[i])]; > > > + entry = &associativity[index]; > > > distance_lookup_table[nid][i] = > > > of_read_number(entry, 1); > > > } > > > } > > > } > > > +static void __initialize_form1_numa_distance(const __be32 *associativity) > > > > Do you actually use this in-between wrapper? > > yes used in > > static void initialize_form1_numa_distance(struct device_node *node) > { > const __be32 *associativity; > > associativity = of_get_associativity(node); > if (!associativity) > return; > > __initialize_form1_numa_distance(associativity); Right, but I mean in more than one place. If this is the only user, you might as well expand it inline here. > } > > > > > > > > +{ > > > + int array_sz; > > > + > > > + array_sz = of_read_number(associativity, 1); > > > + /* Skip the first element in the associativity array */ > > > + ___initialize_form1_numa_distance(associativ
Re: [PATCH v6 6/6] powerpc/pseries: Consolidate form1 distance initialization into a helper
On 8/6/21 12:17 PM, David Gibson wrote: On Tue, Jul 27, 2021 at 03:33:11PM +0530, Aneesh Kumar K.V wrote: Currently, we duplicate parsing code for ibm,associativity and ibm,associativity-lookup-arrays in the kernel. The associativity array provided by these device tree properties are very similar and hence can use a helper to parse the node id and numa distance details. Oh... sorry.. comments on the earlier patch were from before I read and saw you adjusted things here. Signed-off-by: Aneesh Kumar K.V --- arch/powerpc/mm/numa.c | 83 ++ 1 file changed, 51 insertions(+), 32 deletions(-) diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c index fffb3c40f595..7506251e17f2 100644 --- a/arch/powerpc/mm/numa.c +++ b/arch/powerpc/mm/numa.c @@ -171,19 +171,19 @@ static void unmap_cpu_from_node(unsigned long cpu) } #endif /* CONFIG_HOTPLUG_CPU || CONFIG_PPC_SPLPAR */ -/* - * Returns nid in the range [0..nr_node_ids], or -1 if no useful NUMA - * info is found. - */ -static int associativity_to_nid(const __be32 *associativity) +static int __associativity_to_nid(const __be32 *associativity, + int max_array_sz) { int nid = NUMA_NO_NODE; + /* +* primary_domain_index is 1 based array index. +*/ + int index = primary_domain_index - 1; - if (!numa_enabled) + if (!numa_enabled || index >= max_array_sz) goto out; You don't need a goto, you can just return NUMA_NO_NODE. updated - if (of_read_number(associativity, 1) >= primary_domain_index) - nid = of_read_number(&associativity[primary_domain_index], 1); + nid = of_read_number(&associativity[index], 1); /* POWER4 LPAR uses 0x as invalid node */ if (nid == 0x || nid >= nr_node_ids) @@ -191,6 +191,17 @@ static int associativity_to_nid(const __be32 *associativity) out: return nid; } +/* + * Returns nid in the range [0..nr_node_ids], or -1 if no useful NUMA + * info is found. + */ +static int associativity_to_nid(const __be32 *associativity) +{ + int array_sz = of_read_number(associativity, 1); + + /* Skip the first element in the associativity array */ + return __associativity_to_nid((associativity + 1), array_sz); +} static int __cpu_form2_relative_distance(__be32 *cpu1_assoc, __be32 *cpu2_assoc) { @@ -295,24 +306,41 @@ int of_node_to_nid(struct device_node *device) } EXPORT_SYMBOL(of_node_to_nid); -static void __initialize_form1_numa_distance(const __be32 *associativity) +static void ___initialize_form1_numa_distance(const __be32 *associativity, +int max_array_sz) { int i, nid; if (affinity_form != FORM1_AFFINITY) return; - nid = associativity_to_nid(associativity); + nid = __associativity_to_nid(associativity, max_array_sz); if (nid != NUMA_NO_NODE) { for (i = 0; i < distance_ref_points_depth; i++) { const __be32 *entry; + int index = be32_to_cpu(distance_ref_points[i]) - 1; + + /* +* broken hierarchy, return with broken distance table WARN_ON, maybe? updated +*/ + if (index >= max_array_sz) + return; - entry = &associativity[be32_to_cpu(distance_ref_points[i])]; + entry = &associativity[index]; distance_lookup_table[nid][i] = of_read_number(entry, 1); } } } +static void __initialize_form1_numa_distance(const __be32 *associativity) Do you actually use this in-between wrapper? yes used in static void initialize_form1_numa_distance(struct device_node *node) { const __be32 *associativity; associativity = of_get_associativity(node); if (!associativity) return; __initialize_form1_numa_distance(associativity); } +{ + int array_sz; + + array_sz = of_read_number(associativity, 1); + /* Skip the first element in the associativity array */ + ___initialize_form1_numa_distance(associativity + 1, array_sz); +} + static void initialize_form1_numa_distance(struct device_node *node) { const __be32 *associativity; @@ -586,27 +614,18 @@ static int get_nid_and_numa_distance(struct drmem_lmb *lmb) if (primary_domain_index <= aa.array_sz && !(lmb->flags & DRCONF_MEM_AI_INVALID) && lmb->aa_index < aa.n_arrays) { - index = lmb->aa_index * aa.array_sz + primary_domain_index - 1; - nid = of_read_number(&aa.arrays[index], 1); + const __be32 *associativity; - if (nid == 0x || nid >= nr_node_ids) - nid = default_nid; + index = lmb->aa_index * aa.array_sz; + assoc
Re: [PATCH v6 6/6] powerpc/pseries: Consolidate form1 distance initialization into a helper
On Tue, Jul 27, 2021 at 03:33:11PM +0530, Aneesh Kumar K.V wrote: > Currently, we duplicate parsing code for ibm,associativity and > ibm,associativity-lookup-arrays in the kernel. The associativity array > provided > by these device tree properties are very similar and hence can use > a helper to parse the node id and numa distance details. Oh... sorry.. comments on the earlier patch were from before I read and saw you adjusted things here. > > Signed-off-by: Aneesh Kumar K.V > --- > arch/powerpc/mm/numa.c | 83 ++ > 1 file changed, 51 insertions(+), 32 deletions(-) > > diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c > index fffb3c40f595..7506251e17f2 100644 > --- a/arch/powerpc/mm/numa.c > +++ b/arch/powerpc/mm/numa.c > @@ -171,19 +171,19 @@ static void unmap_cpu_from_node(unsigned long cpu) > } > #endif /* CONFIG_HOTPLUG_CPU || CONFIG_PPC_SPLPAR */ > > -/* > - * Returns nid in the range [0..nr_node_ids], or -1 if no useful NUMA > - * info is found. > - */ > -static int associativity_to_nid(const __be32 *associativity) > +static int __associativity_to_nid(const __be32 *associativity, > + int max_array_sz) > { > int nid = NUMA_NO_NODE; > + /* > + * primary_domain_index is 1 based array index. > + */ > + int index = primary_domain_index - 1; > > - if (!numa_enabled) > + if (!numa_enabled || index >= max_array_sz) > goto out; You don't need a goto, you can just return NUMA_NO_NODE. > > - if (of_read_number(associativity, 1) >= primary_domain_index) > - nid = of_read_number(&associativity[primary_domain_index], 1); > + nid = of_read_number(&associativity[index], 1); > > /* POWER4 LPAR uses 0x as invalid node */ > if (nid == 0x || nid >= nr_node_ids) > @@ -191,6 +191,17 @@ static int associativity_to_nid(const __be32 > *associativity) > out: > return nid; > } > +/* > + * Returns nid in the range [0..nr_node_ids], or -1 if no useful NUMA > + * info is found. > + */ > +static int associativity_to_nid(const __be32 *associativity) > +{ > + int array_sz = of_read_number(associativity, 1); > + > + /* Skip the first element in the associativity array */ > + return __associativity_to_nid((associativity + 1), array_sz); > +} > > static int __cpu_form2_relative_distance(__be32 *cpu1_assoc, __be32 > *cpu2_assoc) > { > @@ -295,24 +306,41 @@ int of_node_to_nid(struct device_node *device) > } > EXPORT_SYMBOL(of_node_to_nid); > > -static void __initialize_form1_numa_distance(const __be32 *associativity) > +static void ___initialize_form1_numa_distance(const __be32 *associativity, > + int max_array_sz) > { > int i, nid; > > if (affinity_form != FORM1_AFFINITY) > return; > > - nid = associativity_to_nid(associativity); > + nid = __associativity_to_nid(associativity, max_array_sz); > if (nid != NUMA_NO_NODE) { > for (i = 0; i < distance_ref_points_depth; i++) { > const __be32 *entry; > + int index = be32_to_cpu(distance_ref_points[i]) - 1; > + > + /* > + * broken hierarchy, return with broken distance table WARN_ON, maybe? > + */ > + if (index >= max_array_sz) > + return; > > - entry = > &associativity[be32_to_cpu(distance_ref_points[i])]; > + entry = &associativity[index]; > distance_lookup_table[nid][i] = of_read_number(entry, > 1); > } > } > } > > +static void __initialize_form1_numa_distance(const __be32 *associativity) Do you actually use this in-between wrapper? > +{ > + int array_sz; > + > + array_sz = of_read_number(associativity, 1); > + /* Skip the first element in the associativity array */ > + ___initialize_form1_numa_distance(associativity + 1, array_sz); > +} > + > static void initialize_form1_numa_distance(struct device_node *node) > { > const __be32 *associativity; > @@ -586,27 +614,18 @@ static int get_nid_and_numa_distance(struct drmem_lmb > *lmb) > > if (primary_domain_index <= aa.array_sz && > !(lmb->flags & DRCONF_MEM_AI_INVALID) && lmb->aa_index < > aa.n_arrays) { > - index = lmb->aa_index * aa.array_sz + primary_domain_index - 1; > - nid = of_read_number(&aa.arrays[index], 1); > + const __be32 *associativity; > > - if (nid == 0x || nid >= nr_node_ids) > - nid = default_nid; > + index = lmb->aa_index * aa.array_sz; > + associativity = &aa.arrays[index]; > + nid = __associativity_to_nid(associativity, aa.array_sz); > if (nid > 0 && affinity_form == FORM1_AFFINITY) { > -
[PATCH v6 6/6] powerpc/pseries: Consolidate form1 distance initialization into a helper
Currently, we duplicate parsing code for ibm,associativity and ibm,associativity-lookup-arrays in the kernel. The associativity array provided by these device tree properties are very similar and hence can use a helper to parse the node id and numa distance details. Signed-off-by: Aneesh Kumar K.V --- arch/powerpc/mm/numa.c | 83 ++ 1 file changed, 51 insertions(+), 32 deletions(-) diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c index fffb3c40f595..7506251e17f2 100644 --- a/arch/powerpc/mm/numa.c +++ b/arch/powerpc/mm/numa.c @@ -171,19 +171,19 @@ static void unmap_cpu_from_node(unsigned long cpu) } #endif /* CONFIG_HOTPLUG_CPU || CONFIG_PPC_SPLPAR */ -/* - * Returns nid in the range [0..nr_node_ids], or -1 if no useful NUMA - * info is found. - */ -static int associativity_to_nid(const __be32 *associativity) +static int __associativity_to_nid(const __be32 *associativity, + int max_array_sz) { int nid = NUMA_NO_NODE; + /* +* primary_domain_index is 1 based array index. +*/ + int index = primary_domain_index - 1; - if (!numa_enabled) + if (!numa_enabled || index >= max_array_sz) goto out; - if (of_read_number(associativity, 1) >= primary_domain_index) - nid = of_read_number(&associativity[primary_domain_index], 1); + nid = of_read_number(&associativity[index], 1); /* POWER4 LPAR uses 0x as invalid node */ if (nid == 0x || nid >= nr_node_ids) @@ -191,6 +191,17 @@ static int associativity_to_nid(const __be32 *associativity) out: return nid; } +/* + * Returns nid in the range [0..nr_node_ids], or -1 if no useful NUMA + * info is found. + */ +static int associativity_to_nid(const __be32 *associativity) +{ + int array_sz = of_read_number(associativity, 1); + + /* Skip the first element in the associativity array */ + return __associativity_to_nid((associativity + 1), array_sz); +} static int __cpu_form2_relative_distance(__be32 *cpu1_assoc, __be32 *cpu2_assoc) { @@ -295,24 +306,41 @@ int of_node_to_nid(struct device_node *device) } EXPORT_SYMBOL(of_node_to_nid); -static void __initialize_form1_numa_distance(const __be32 *associativity) +static void ___initialize_form1_numa_distance(const __be32 *associativity, +int max_array_sz) { int i, nid; if (affinity_form != FORM1_AFFINITY) return; - nid = associativity_to_nid(associativity); + nid = __associativity_to_nid(associativity, max_array_sz); if (nid != NUMA_NO_NODE) { for (i = 0; i < distance_ref_points_depth; i++) { const __be32 *entry; + int index = be32_to_cpu(distance_ref_points[i]) - 1; + + /* +* broken hierarchy, return with broken distance table +*/ + if (index >= max_array_sz) + return; - entry = &associativity[be32_to_cpu(distance_ref_points[i])]; + entry = &associativity[index]; distance_lookup_table[nid][i] = of_read_number(entry, 1); } } } +static void __initialize_form1_numa_distance(const __be32 *associativity) +{ + int array_sz; + + array_sz = of_read_number(associativity, 1); + /* Skip the first element in the associativity array */ + ___initialize_form1_numa_distance(associativity + 1, array_sz); +} + static void initialize_form1_numa_distance(struct device_node *node) { const __be32 *associativity; @@ -586,27 +614,18 @@ static int get_nid_and_numa_distance(struct drmem_lmb *lmb) if (primary_domain_index <= aa.array_sz && !(lmb->flags & DRCONF_MEM_AI_INVALID) && lmb->aa_index < aa.n_arrays) { - index = lmb->aa_index * aa.array_sz + primary_domain_index - 1; - nid = of_read_number(&aa.arrays[index], 1); + const __be32 *associativity; - if (nid == 0x || nid >= nr_node_ids) - nid = default_nid; + index = lmb->aa_index * aa.array_sz; + associativity = &aa.arrays[index]; + nid = __associativity_to_nid(associativity, aa.array_sz); if (nid > 0 && affinity_form == FORM1_AFFINITY) { - int i; - const __be32 *associativity; - - index = lmb->aa_index * aa.array_sz; - associativity = &aa.arrays[index]; /* -* lookup array associativity entries have different format -* There is no length of the array as the first element. +* lookup array associativity entries