Patchwork [PATCHv8,02/10] acpi: Add HMAT to generic parsing tables

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Submitter Keith Busch
Date March 11, 2019, 8:55 p.m.
Message ID <20190311205606.11228-3-keith.busch@intel.com>
Download mbox | patch
Permalink /patch/746441/
State New
Headers show

Comments

Keith Busch - March 11, 2019, 8:55 p.m.
The Heterogeneous Memory Attribute Table (HMAT) header has different
field lengths than the existing parsing uses. Add the HMAT type to the
parsing rules so it may be generically parsed.

Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Tested-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Keith Busch <keith.busch@intel.com>
---
 drivers/acpi/tables.c | 9 +++++++++
 include/linux/acpi.h  | 1 +
 2 files changed, 10 insertions(+)

Patch

diff --git a/drivers/acpi/tables.c b/drivers/acpi/tables.c
index 7553774a22b7..3d0da38f94c6 100644
--- a/drivers/acpi/tables.c
+++ b/drivers/acpi/tables.c
@@ -51,6 +51,7 @@  static int acpi_apic_instance __initdata;
 
 enum acpi_subtable_type {
 	ACPI_SUBTABLE_COMMON,
+	ACPI_SUBTABLE_HMAT,
 };
 
 struct acpi_subtable_entry {
@@ -232,6 +233,8 @@  acpi_get_entry_type(struct acpi_subtable_entry *entry)
 	switch (entry->type) {
 	case ACPI_SUBTABLE_COMMON:
 		return entry->hdr->common.type;
+	case ACPI_SUBTABLE_HMAT:
+		return entry->hdr->hmat.type;
 	}
 	return 0;
 }
@@ -242,6 +245,8 @@  acpi_get_entry_length(struct acpi_subtable_entry *entry)
 	switch (entry->type) {
 	case ACPI_SUBTABLE_COMMON:
 		return entry->hdr->common.length;
+	case ACPI_SUBTABLE_HMAT:
+		return entry->hdr->hmat.length;
 	}
 	return 0;
 }
@@ -252,6 +257,8 @@  acpi_get_subtable_header_length(struct acpi_subtable_entry *entry)
 	switch (entry->type) {
 	case ACPI_SUBTABLE_COMMON:
 		return sizeof(entry->hdr->common);
+	case ACPI_SUBTABLE_HMAT:
+		return sizeof(entry->hdr->hmat);
 	}
 	return 0;
 }
@@ -259,6 +266,8 @@  acpi_get_subtable_header_length(struct acpi_subtable_entry *entry)
 static enum acpi_subtable_type __init
 acpi_get_subtable_type(char *id)
 {
+	if (strncmp(id, ACPI_SIG_HMAT, 4) == 0)
+		return ACPI_SUBTABLE_HMAT;
 	return ACPI_SUBTABLE_COMMON;
 }
 
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 9494d42bf507..7c7515b0767e 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -143,6 +143,7 @@  enum acpi_address_range_id {
 /* Table Handlers */
 union acpi_subtable_headers {
 	struct acpi_subtable_header common;
+	struct acpi_hmat_structure hmat;
 };
 
 typedef int (*acpi_tbl_table_handler)(struct acpi_table_header *table);