From: Masayoshi Mizuma <m.mizuma@xxxxxxxxxxxxxx>
Add a helper function, get_number_of_physical_sockets_from_dmi(),
to get physical sockets from DMI table in case of the sysfs for
cpu topology doesn't have the physical socket information.
get_number_of_physical_sockets_from_dmi() parse the DMI table
and counts the number of SMBIOS Processor Information (Type04)
structure.
Signed-off-by: Masayoshi Mizuma <m.mizuma@xxxxxxxxxxxxxx>
---
sys-utils/lscpu-dmi.c | 29 +++++++++++++++++++++++++++++
sys-utils/lscpu.h | 2 ++
2 files changed, 31 insertions(+)
diff --git a/sys-utils/lscpu-dmi.c b/sys-utils/lscpu-dmi.c
index 00d4439f8..e7ffa88d3 100644
--- a/sys-utils/lscpu-dmi.c
+++ b/sys-utils/lscpu-dmi.c
@@ -66,6 +66,9 @@ int parse_dmi_table(uint16_t len, uint16_t num,
di->manufacturer = dmi_string(&h, data[0x04]);
di->product = dmi_string(&h, data[0x05]);
break;
+ case 4:
+ di->sockets++;
+ break;
default:
break;
}
@@ -77,3 +80,29 @@ int parse_dmi_table(uint16_t len, uint16_t num,
done:
return rc;
}
+
+size_t get_number_of_physical_sockets_from_dmi(void)
+{
+ static char const sys_fw_dmi_tables[] = _PATH_SYS_DMI;
+ struct dmi_info di;
+ struct stat st;
+ uint8_t *data;
+ int rc = 0;
+
+ if (stat(sys_fw_dmi_tables, &st))
+ return rc;
+
+ data = get_mem_chunk(0, st.st_size, sys_fw_dmi_tables);
+ if (!data)
+ return rc;
+
+ memset(&di, 0, sizeof(struct dmi_info));
+ rc = parse_dmi_table(st.st_size, st.st_size/4, data, &di);
+
+ free(data);
+
+ if ((rc < 0) || !di.sockets)
+ return 0;
+ else
+ return di.sockets;
+}
diff --git a/sys-utils/lscpu.h b/sys-utils/lscpu.h
index 9ec3fca17..74c647e3a 100644
--- a/sys-utils/lscpu.h
+++ b/sys-utils/lscpu.h
@@ -311,10 +311,12 @@ struct dmi_info {
char *vendor;
char *product;
char *manufacturer;
+ int sockets;
};
void to_dmi_header(struct lscpu_dmi_header *h, uint8_t *data);
char *dmi_string(const struct lscpu_dmi_header *dm, uint8_t s);
int parse_dmi_table(uint16_t len, uint16_t num, uint8_t *data, struct dmi_info *di);
+size_t get_number_of_physical_sockets_from_dmi(void);
#endif /* LSCPU_H */
--
2.27.0
