Besides the phys addr of the acpi tables, it will be very convenient if
we also have the signature of each table in acpi_gbl_root_table_list at
early time. We can find SRAT easily by comparing the signature.
This patch alse record signature and some other info in
acpi_gbl_root_table_list at early time.
Signed-off-by: Tang Chen <tangchen@xxxxxxxxxxxxxx>
---
drivers/acpi/acpica/tbutils.c | 23 +++++++++++++++++++++++
1 files changed, 23 insertions(+), 0 deletions(-)
diff --git a/drivers/acpi/acpica/tbutils.c b/drivers/acpi/acpica/tbutils.c
index 9d68ffc..37cc5e4 100644
--- a/drivers/acpi/acpica/tbutils.c
+++ b/drivers/acpi/acpica/tbutils.c
@@ -514,6 +514,7 @@ acpi_tb_install_table(acpi_physical_address address,
* fully mapped later (in verify table). In any case, we must
* unmap the header that was mapped above.
*/
+ table_desc = &acpi_gbl_root_table_list.tables[table_index];
final_table = acpi_tb_table_override(table, table_desc);
if (!final_table) {
final_table = table; /* There was no override */
@@ -627,6 +628,7 @@ acpi_tb_parse_root_table(acpi_physical_address rsdp_address)
u32 i;
u32 table_count;
struct acpi_table_header *table;
+ struct acpi_table_desc *table_desc;
acpi_physical_address address;
acpi_physical_address uninitialized_var(rsdt_address);
u32 length;
@@ -766,6 +768,27 @@ acpi_tb_parse_root_table(acpi_physical_address rsdp_address)
*/
acpi_os_unmap_memory(table, length);
+ /*
+ * Also initialize the table entries here, so that later we can use them
+ * to find SRAT at very eraly time to reserve hotpluggable memory.
+ */
+ for (i = 2; i < table_count; i++) {
+ table = acpi_os_map_memory(
+ acpi_gbl_root_table_list.tables[i].address,
+ sizeof(struct acpi_table_header));
+ if (!table)
+ return_ACPI_STATUS(AE_NO_MEMORY);
+
+ table_desc = &acpi_gbl_root_table_list.tables[i];
+
+ table_desc->pointer = NULL;
+ table_desc->length = table->length;
+ table_desc->flags = ACPI_TABLE_ORIGIN_MAPPED;
+ ACPI_MOVE_32_TO_32(table_desc->signature.ascii, table->signature);
+
+ acpi_os_unmap_memory(table, sizeof(struct acpi_table_header));
+ }
+
return_ACPI_STATUS(AE_OK);
}
--
1.7.1
--
To unsubscribe from this list: send the line "unsubscribe linux-doc" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
