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authorHuacai Chen <chenhuacai@loongson.cn>2022-07-19 10:53:13 +0800
committerHuacai Chen <chenhuacai@loongson.cn>2022-08-12 13:10:11 +0800
commite9e7ff16d7f098f6fa9394e9d2b191c01ba0d5f6 (patch)
treef60dadb261598d0a4fbfd832528d4889d01bf9b3 /arch
parentab2579d79529b8ed34f26a374a352f12ce24d5df (diff)
LoongArch: Parse MADT to get multi-processor information
Parse MADT to get multi-processor information, in order to fix the boot problem and cpu-hotplug problem for SMP platform. Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'arch')
-rw-r--r--arch/loongarch/include/asm/bootinfo.h2
-rw-r--r--arch/loongarch/include/asm/irq.h2
-rw-r--r--arch/loongarch/kernel/acpi.c38
-rw-r--r--arch/loongarch/kernel/smp.c5
4 files changed, 40 insertions, 7 deletions
diff --git a/arch/loongarch/include/asm/bootinfo.h b/arch/loongarch/include/asm/bootinfo.h
index 9b8d49d9e61b..e02ac4af7f6e 100644
--- a/arch/loongarch/include/asm/bootinfo.h
+++ b/arch/loongarch/include/asm/bootinfo.h
@@ -28,10 +28,10 @@ struct loongson_board_info {
struct loongson_system_configuration {
int nr_cpus;
int nr_nodes;
- int nr_io_pics;
int boot_cpu_id;
int cores_per_node;
int cores_per_package;
+ unsigned long cores_io_master;
const char *cpuname;
};
diff --git a/arch/loongarch/include/asm/irq.h b/arch/loongarch/include/asm/irq.h
index 149b2123e7f4..f6c2455b4584 100644
--- a/arch/loongarch/include/asm/irq.h
+++ b/arch/loongarch/include/asm/irq.h
@@ -82,8 +82,6 @@ extern struct acpi_vector_group msi_group[MAX_IO_PICS];
#define GSI_MAX_PCH_IRQ (LOONGSON_PCH_IRQ_BASE + 256 - 1)
extern int find_pch_pic(u32 gsi);
-extern int eiointc_get_node(int id);
-
struct acpi_madt_lio_pic;
struct acpi_madt_eio_pic;
struct acpi_madt_ht_pic;
diff --git a/arch/loongarch/kernel/acpi.c b/arch/loongarch/kernel/acpi.c
index 03aa14581d0a..f1c928648a4a 100644
--- a/arch/loongarch/kernel/acpi.c
+++ b/arch/loongarch/kernel/acpi.c
@@ -104,6 +104,39 @@ static int set_processor_mask(u32 id, u32 flags)
}
#endif
+static int __init
+acpi_parse_processor(union acpi_subtable_headers *header, const unsigned long end)
+{
+ struct acpi_madt_core_pic *processor = NULL;
+
+ processor = (struct acpi_madt_core_pic *)header;
+ if (BAD_MADT_ENTRY(processor, end))
+ return -EINVAL;
+
+ acpi_table_print_madt_entry(&header->common);
+#ifdef CONFIG_SMP
+ set_processor_mask(processor->core_id, processor->flags);
+#endif
+
+ return 0;
+}
+
+static int __init
+acpi_parse_eio_master(union acpi_subtable_headers *header, const unsigned long end)
+{
+ static int core = 0;
+ struct acpi_madt_eio_pic *eiointc = NULL;
+
+ eiointc = (struct acpi_madt_eio_pic *)header;
+ if (BAD_MADT_ENTRY(eiointc, end))
+ return -EINVAL;
+
+ core = eiointc->node * CORES_PER_EIO_NODE;
+ set_bit(core, &(loongson_sysconf.cores_io_master));
+
+ return 0;
+}
+
static void __init acpi_process_madt(void)
{
#ifdef CONFIG_SMP
@@ -114,6 +147,11 @@ static void __init acpi_process_madt(void)
__cpu_logical_map[i] = -1;
}
#endif
+ acpi_table_parse_madt(ACPI_MADT_TYPE_CORE_PIC,
+ acpi_parse_processor, MAX_CORE_PIC);
+
+ acpi_table_parse_madt(ACPI_MADT_TYPE_EIO_PIC,
+ acpi_parse_eio_master, MAX_IO_PICS);
loongson_sysconf.nr_cpus = num_processors;
}
diff --git a/arch/loongarch/kernel/smp.c b/arch/loongarch/kernel/smp.c
index 09743103d9b3..b5fab308dcf2 100644
--- a/arch/loongarch/kernel/smp.c
+++ b/arch/loongarch/kernel/smp.c
@@ -242,10 +242,7 @@ void loongson3_smp_finish(void)
static bool io_master(int cpu)
{
- if (cpu == 0)
- return true;
-
- return false;
+ return test_bit(cpu, &loongson_sysconf.cores_io_master);
}
int loongson3_cpu_disable(void)

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