[PATCH v5 13/14] acpi, numa: Enable ACPI based NUMA on ARM64

David Daney
2016-04-20T01:41:51Z

From: Hanjun Guo <hanjun.guo@linaro.org>

Add function needed for cpu to node mapping, and enable ACPI based
NUMA for ARM64 in Kconfig

Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Robert Richter <rrichter@cavium.com>
Signed-off-by: David Daney <david.daney@cavium.com>
---
drivers/acpi/Kconfig | 2 +-
drivers/acpi/numa.c | 35 +++++++++++++++++++++++++++++++++++
include/linux/acpi.h | 17 ++++++++++++++++-
3 files changed, 52 insertions(+), 2 deletions(-)

diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index 82b96ee..5ce9f66 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -291,7 +291,7 @@ config ACPI_THERMAL
config ACPI_NUMA
bool "NUMA support"
depends on NUMA
- depends on (X86 || IA64)
+ depends on (X86 || IA64 || ARM64)
default y if IA64_GENERIC || IA64_SGI_SN2

config ACPI_CUSTOM_DSDT_FILE
diff --git a/drivers/acpi/numa.c b/drivers/acpi/numa.c
index d244018..02c6dd8 100644
--- a/drivers/acpi/numa.c
+++ b/drivers/acpi/numa.c
@@ -170,6 +170,18 @@ acpi_table_print_srat_entry(struct acpi_subtable_header *header)
}
break;

+ case ACPI_SRAT_TYPE_GICC_AFFINITY:
+ {
+ struct acpi_srat_gicc_affinity *p =
+ (struct acpi_srat_gicc_affinity *)header;
+ pr_debug("SRAT Processor (acpi id[0x%04x]) in proximity domain %d %s\n",
+ p->acpi_processor_uid,
+ p->proximity_domain,
+ (p->flags & ACPI_SRAT_GICC_ENABLED) ?
+ "enabled" : "disabled");
+ }
+ break;
+
default:
pr_warn("Found unsupported SRAT entry (type = 0x%x)\n",
header->type);
@@ -360,6 +372,24 @@ acpi_parse_processor_affinity(struct acpi_subtable_header *header,
return 0;
}

+static int __init
+acpi_parse_gicc_affinity(struct acpi_subtable_header *header,
+ const unsigned long end)
+{
+ struct acpi_srat_gicc_affinity *processor_affinity;
+
+ processor_affinity = (struct acpi_srat_gicc_affinity *)header;
+ if (!processor_affinity)
+ return -EINVAL;
+
+ acpi_table_print_srat_entry(header);
+
+ /* let architecture-dependent part to do it */
+ acpi_numa_gicc_affinity_init(processor_affinity);
+
+ return 0;
+}
+
static int __initdata parsed_numa_memblks;

static int __init
@@ -404,6 +434,9 @@ int __init acpi_numa_init(void)
{
int cnt = 0;

+ if (acpi_disabled)
+ return -EINVAL;
+
/*
* Should not limit number with cpu num that is from NR_CPUS or nr_cpus=
* SRAT cpu entries could have different order with that in MADT.
@@ -416,6 +449,8 @@ int __init acpi_numa_init(void)
acpi_parse_x2apic_affinity, 0);
acpi_table_parse_srat(ACPI_SRAT_TYPE_CPU_AFFINITY,
acpi_parse_processor_affinity, 0);
+ acpi_table_parse_srat(ACPI_SRAT_TYPE_GICC_AFFINITY,
+ acpi_parse_gicc_affinity, 0);
cnt = acpi_table_parse_srat(ACPI_SRAT_TYPE_MEMORY_AFFINITY,
acpi_parse_memory_affinity,
NR_NODE_MEMBLKS);
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index ab6fd96..af34064 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -239,10 +239,25 @@ int acpi_table_parse_madt(enum acpi_madt_type id,
int acpi_parse_mcfg (struct acpi_table_header *header);
void acpi_table_print_madt_entry (struct acpi_subtable_header *madt);

-/* the following four functions are architecture-dependent */
+/* the following numa functions are architecture-dependent */
void acpi_numa_slit_init (struct acpi_table_slit *slit);
+
+#if defined(CONFIG_X86) || defined(CONFIG_IA64)
void acpi_numa_processor_affinity_init (struct acpi_srat_cpu_affinity *pa);
+#else
+static inline void
+acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa) { }
+#endif
+
void acpi_numa_x2apic_affinity_init(struct acpi_srat_x2apic_cpu_affinity *pa);
+
+#ifdef CONFIG_ARM64
+void acpi_numa_gicc_affinity_init(struct acpi_srat_gicc_affinity *pa);
+#else
+static inline void
+acpi_numa_gicc_affinity_init(struct acpi_srat_gicc_affinity *pa) { }
+#endif
+
int acpi_numa_memory_affinity_init (struct acpi_srat_mem_affinity *ma);

#ifndef PHYS_CPUID_INVALID
--
1.7.11.7