1 files changed, 99 insertions, 0 deletions
diff --git a/hw/acpi/hmat.c b/hw/acpi/hmat.c
new file mode 100644
index 0000000000..9ff79308a4
--- /dev/null
+++ b/hw/acpi/hmat.c
@@ -0,0 +1,99 @@
+/*
+ * HMAT ACPI Implementation
+ *
+ * Copyright(C) 2019 Intel Corporation.
+ *
+ * Author:
+ *  Liu jingqi <jingqi.liu@linux.intel.com>
+ *  Tao Xu <tao3.xu@intel.com>
+ *
+ * HMAT is defined in ACPI 6.3: 5.2.27 Heterogeneous Memory Attribute Table
+ * (HMAT)
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>
+ */
+
+#include "qemu/osdep.h"
+#include "sysemu/numa.h"
+#include "hw/acpi/hmat.h"
+
+/*
+ * ACPI 6.3:
+ * 5.2.27.3 Memory Proximity Domain Attributes Structure: Table 5-145
+ */
+static void build_hmat_mpda(GArray *table_data, uint16_t flags,
+                            uint32_t initiator, uint32_t mem_node)
+{
+
+    /* Memory Proximity Domain Attributes Structure */
+    /* Type */
+    build_append_int_noprefix(table_data, 0, 2);
+    /* Reserved */
+    build_append_int_noprefix(table_data, 0, 2);
+    /* Length */
+    build_append_int_noprefix(table_data, 40, 4);
+    /* Flags */
+    build_append_int_noprefix(table_data, flags, 2);
+    /* Reserved */
+    build_append_int_noprefix(table_data, 0, 2);
+    /* Proximity Domain for the Attached Initiator */
+    build_append_int_noprefix(table_data, initiator, 4);
+    /* Proximity Domain for the Memory */
+    build_append_int_noprefix(table_data, mem_node, 4);
+    /* Reserved */
+    build_append_int_noprefix(table_data, 0, 4);
+    /*
+     * Reserved:
+     * Previously defined as the Start Address of the System Physical
+     * Address Range. Deprecated since ACPI Spec 6.3.
+     */
+    build_append_int_noprefix(table_data, 0, 8);
+    /*
+     * Reserved:
+     * Previously defined as the Range Length of the region in bytes.
+     * Deprecated since ACPI Spec 6.3.
+     */
+    build_append_int_noprefix(table_data, 0, 8);
+}
+
+/* Build HMAT sub table structures */
+static void hmat_build_table_structs(GArray *table_data, NumaState *numa_state)
+{
+    uint16_t flags;
+    int i;
+
+    for (i = 0; i < numa_state->num_nodes; i++) {
+        flags = 0;
+
+        if (numa_state->nodes[i].initiator < MAX_NODES) {
+            flags |= HMAT_PROXIMITY_INITIATOR_VALID;
+        }
+
+        build_hmat_mpda(table_data, flags, numa_state->nodes[i].initiator, i);
+    }
+}
+
+void build_hmat(GArray *table_data, BIOSLinker *linker, NumaState *numa_state)
+{
+    int hmat_start = table_data->len;
+
+    /* reserve space for HMAT header  */
+    acpi_data_push(table_data, 40);
+
+    hmat_build_table_structs(table_data, numa_state);
+
+    build_header(linker, table_data,
+                 (void *)(table_data->data + hmat_start),
+                 "HMAT", table_data->len - hmat_start, 2, NULL, NULL);
+}