From a0816e4374759048cb24b9b3549a093a2ccb6240 Mon Sep 17 00:00:00 2001
From: "plai@redhat.com" <plai@redhat.com>
Date: Thu, 21 May 2020 23:56:50 +0100
Subject: [PATCH 07/12] hmat acpi: Build Memory Proximity Domain Attributes
 Structure(s)

RH-Author: plai@redhat.com
Message-id: <20200521235655.27141-7-plai@redhat.com>
Patchwork-id: 96734
O-Subject: [RHEL8.2.1 AV qemu-kvm PATCH 06/11] hmat acpi: Build Memory Proximity Domain Attributes Structure(s)
Bugzilla: 1600217
RH-Acked-by: Michael S. Tsirkin <mst@redhat.com>
RH-Acked-by: Igor Mammedov <imammedo@redhat.com>
RH-Acked-by: Eduardo Habkost <ehabkost@redhat.com>

From: Liu Jingqi <jingqi.liu@intel.com>

HMAT is defined in ACPI 6.3: 5.2.27 Heterogeneous Memory Attribute Table
(HMAT). The specification references below link:
http://www.uefi.org/sites/default/files/resources/ACPI_6_3_final_Jan30.pdf

It describes the memory attributes, such as memory side cache
attributes and bandwidth and latency details, related to the
Memory Proximity Domain. The software is
expected to use this information as hint for optimization.

This structure describes Memory Proximity Domain Attributes by memory
subsystem and its associativity with processor proximity domain as well as
hint for memory usage.

In the linux kernel, the codes in drivers/acpi/hmat/hmat.c parse and report
the platform's HMAT tables.

Acked-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Daniel Black <daniel@linux.ibm.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Liu Jingqi <jingqi.liu@intel.com>
Signed-off-by: Tao Xu <tao3.xu@intel.com>
Message-Id: <20191213011929.2520-5-tao3.xu@intel.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
(cherry picked from commit e6f123c3b81241be33f1b763d0ff8b36d1ae9c1e)
Signed-off-by: Paul Lai <plai@redhat.com>
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
---
 hw/acpi/Kconfig       |  7 ++--
 hw/acpi/Makefile.objs |  1 +
 hw/acpi/hmat.c        | 99 +++++++++++++++++++++++++++++++++++++++++++++++++++
 hw/acpi/hmat.h        | 42 ++++++++++++++++++++++
 hw/i386/acpi-build.c  |  5 +++
 5 files changed, 152 insertions(+), 2 deletions(-)
 create mode 100644 hw/acpi/hmat.c
 create mode 100644 hw/acpi/hmat.h

diff --git a/hw/acpi/Kconfig b/hw/acpi/Kconfig
index 12e3f1e..54209c6 100644
--- a/hw/acpi/Kconfig
+++ b/hw/acpi/Kconfig
@@ -7,6 +7,7 @@ config ACPI_X86
     select ACPI_NVDIMM
     select ACPI_CPU_HOTPLUG
     select ACPI_MEMORY_HOTPLUG
+    select ACPI_HMAT
 
 config ACPI_X86_ICH
     bool
@@ -23,6 +24,10 @@ config ACPI_NVDIMM
     bool
     depends on ACPI
 
+config ACPI_HMAT
+    bool
+    depends on ACPI
+
 config ACPI_PCI
     bool
     depends on ACPI && PCI
@@ -33,5 +38,3 @@ config ACPI_VMGENID
     depends on PC
 
 config ACPI_HW_REDUCED
-    bool
-    depends on ACPI
diff --git a/hw/acpi/Makefile.objs b/hw/acpi/Makefile.objs
index 655a9c1..517bd88 100644
--- a/hw/acpi/Makefile.objs
+++ b/hw/acpi/Makefile.objs
@@ -7,6 +7,7 @@ common-obj-$(CONFIG_ACPI_CPU_HOTPLUG) += cpu.o
 common-obj-$(CONFIG_ACPI_NVDIMM) += nvdimm.o
 common-obj-$(CONFIG_ACPI_VMGENID) += vmgenid.o
 common-obj-$(CONFIG_ACPI_HW_REDUCED) += generic_event_device.o
+common-obj-$(CONFIG_ACPI_HMAT) += hmat.o
 common-obj-$(call lnot,$(CONFIG_ACPI_X86)) += acpi-stub.o
 
 common-obj-y += acpi_interface.o
diff --git a/hw/acpi/hmat.c b/hw/acpi/hmat.c
new file mode 100644
index 0000000..9ff7930
--- /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);
+}
diff --git a/hw/acpi/hmat.h b/hw/acpi/hmat.h
new file mode 100644
index 0000000..437dbc6
--- /dev/null
+++ b/hw/acpi/hmat.h
@@ -0,0 +1,42 @@
+/*
+ * HMAT ACPI Implementation Header
+ *
+ * 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/>
+ */
+
+#ifndef HMAT_H
+#define HMAT_H
+
+#include "hw/acpi/aml-build.h"
+
+/*
+ * ACPI 6.3: 5.2.27.3 Memory Proximity Domain Attributes Structure,
+ * Table 5-145, Field "flag", Bit [0]: set to 1 to indicate that data in
+ * the Proximity Domain for the Attached Initiator field is valid.
+ * Other bits reserved.
+ */
+#define HMAT_PROXIMITY_INITIATOR_VALID  0x1
+
+void build_hmat(GArray *table_data, BIOSLinker *linker, NumaState *numa_state);
+
+#endif
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index 6400189..b1f8c55 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -67,6 +67,7 @@
 #include "hw/i386/intel_iommu.h"
 
 #include "hw/acpi/ipmi.h"
+#include "hw/acpi/hmat.h"
 
 /* These are used to size the ACPI tables for -M pc-i440fx-1.7 and
  * -M pc-i440fx-2.0.  Even if the actual amount of AML generated grows
@@ -2837,6 +2838,10 @@ void acpi_build(AcpiBuildTables *tables, MachineState *machine)
             acpi_add_table(table_offsets, tables_blob);
             build_slit(tables_blob, tables->linker, machine);
         }
+        if (machine->numa_state->hmat_enabled) {
+            acpi_add_table(table_offsets, tables_blob);
+            build_hmat(tables_blob, tables->linker, machine->numa_state);
+        }
     }
     if (acpi_get_mcfg(&mcfg)) {
         acpi_add_table(table_offsets, tables_blob);
-- 
1.8.3.1

