[Qemu-devel] [PATCH 15/17] acpi: Add a way for devices to add ACPI tables

[minyard@acm.org]

From: Corey Minyard <cminyard@mvista.com>

Some devices, like IPMI, need to add ACPI table entries to report
their presence.  Add a method for adding these entries.

Signed-off-by: Corey Minyard <cminyard@mvista.com>
---
 hw/acpi/Makefile.objs             |  1 +
 hw/acpi/acpi-dev-tables.c         | 80 +++++++++++++++++++++++++++++++++++++++
 hw/i386/acpi-build.c              | 17 +++++++++
 include/hw/acpi/acpi-dev-tables.h | 38 +++++++++++++++++++
 4 files changed, 136 insertions(+)
 create mode 100644 hw/acpi/acpi-dev-tables.c
 create mode 100644 include/hw/acpi/acpi-dev-tables.h

diff --git a/hw/acpi/Makefile.objs b/hw/acpi/Makefile.objs
index b9fefa7..2b84f08 100644
--- a/hw/acpi/Makefile.objs
+++ b/hw/acpi/Makefile.objs
@@ -3,3 +3,4 @@ common-obj-$(CONFIG_ACPI) += memory_hotplug.o
 common-obj-$(CONFIG_ACPI) += acpi_interface.o
 common-obj-$(CONFIG_ACPI) += bios-linker-loader.o
 common-obj-$(CONFIG_ACPI) += aml-build.o
+common-obj-$(CONFIG_ACPI) += acpi-dev-tables.o
diff --git a/hw/acpi/acpi-dev-tables.c b/hw/acpi/acpi-dev-tables.c
new file mode 100644
index 0000000..7f07a3d
--- /dev/null
+++ b/hw/acpi/acpi-dev-tables.c
@@ -0,0 +1,80 @@
+/*
+ * Add and get ACPI tables registered by devices.
+ *
+ * Copyright (c) 2015 Corey Minyard, MontaVista Software, LLC
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include <string.h>
+#include <hw/acpi/acpi-dev-tables.h>
+#include <qemu/queue.h>
+
+struct acpi_dev_table {
+    void *data;
+    int size;
+    const char *sig;
+    uint8_t rev;
+    QSLIST_ENTRY(acpi_dev_table) next;
+};
+
+static QSLIST_HEAD(, acpi_dev_table) acpi_table_entries;
+
+void
+add_acpi_dev_table(void *data, int size, const char *sig, uint8_t rev)
+{
+    struct acpi_dev_table *e = g_malloc(sizeof(*e));
+
+    e->data = g_malloc(size);
+    memcpy(e->data, data, size);
+    e->size = size;
+    e->sig = sig;
+    e->rev = rev;
+    QSLIST_INSERT_HEAD(&acpi_table_entries, e, next);
+}
+
+struct acpi_dev_table *acpi_dev_table_first(void)
+{
+    return QSLIST_FIRST(&acpi_table_entries);
+}
+
+struct acpi_dev_table *acpi_dev_table_next(struct acpi_dev_table *current)
+{
+    return QSLIST_NEXT(current, next);
+}
+
+uint8_t *acpi_dev_table_data(struct acpi_dev_table *e)
+{
+    return e->data;
+}
+
+unsigned acpi_dev_table_len(struct acpi_dev_table *e)
+{
+    return e->size;
+}
+
+const char *acpi_dev_table_sig(struct acpi_dev_table *e)
+{
+    return e->sig;
+}
+
+uint8_t acpi_dev_table_rev(struct acpi_dev_table *e)
+{
+    return e->rev;
+}
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index e761005..0b4d195 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -35,6 +35,7 @@
 #include "hw/timer/hpet.h"
 #include "hw/i386/acpi-defs.h"
 #include "hw/acpi/acpi.h"
+#include "hw/acpi/acpi-dev-tables.h"
 #include "hw/nvram/fw_cfg.h"
 #include "hw/acpi/bios-linker-loader.h"
 #include "hw/loader.h"
@@ -1377,6 +1378,7 @@ void acpi_build(PcGuestInfo *guest_info, AcpiBuildTables *tables)
     AcpiMcfgInfo mcfg;
     PcPciInfo pci;
     uint8_t *u;
+    struct acpi_dev_table *dt;
     size_t aml_len = 0;
     GArray *tables_blob = tables->table_data;
 
@@ -1448,6 +1450,21 @@ void acpi_build(PcGuestInfo *guest_info, AcpiBuildTables *tables)
         build_dmar_q35(tables_blob, tables->linker);
     }
 
+    /* Add tables from devices. */
+    for (dt = acpi_dev_table_first(); dt; dt = acpi_dev_table_next(dt)) {
+        unsigned len = acpi_dev_table_len(dt);
+        void *data = acpi_dev_table_data(dt);
+
+        acpi_add_table(table_offsets, tables_blob);
+        acpi_data_push(tables_blob, sizeof(AcpiTableHeader));
+        g_array_append_vals(tables_blob, data, len);
+        build_header(tables->linker, tables_blob,
+            (void *)(tables_blob->data + tables_blob->len -
+                     len - sizeof(AcpiTableHeader)),
+            acpi_dev_table_sig(dt), len + sizeof(AcpiTableHeader),
+            acpi_dev_table_rev(dt));
+    }
+
     /* Add tables supplied by user (if any) */
     for (u = acpi_table_first(); u; u = acpi_table_next(u)) {
         unsigned len = acpi_table_len(u);
diff --git a/include/hw/acpi/acpi-dev-tables.h b/include/hw/acpi/acpi-dev-tables.h
new file mode 100644
index 0000000..6dd18a5
--- /dev/null
+++ b/include/hw/acpi/acpi-dev-tables.h
@@ -0,0 +1,38 @@
+/*
+ * Add and get ACPI tables registered by devices.
+ *
+ * Copyright (C) 2015  Corey Minyard <cminyard@mvista.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2 as published by the Free Software Foundation.
+ *
+ * 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/>
+ *
+ * Contributions after 2012-01-13 are licensed under the terms of the
+ * GNU GPL, version 2 or (at your option) any later version.
+ */
+
+#ifndef QEMU_HW_ACPI_HOOKS_H
+#define QEMU_HW_ACPI_HOOKS_H
+
+#include <hw/acpi/aml-build.h>
+
+void add_acpi_dev_table(void *data, int size, const char *sig, uint8_t rev);
+
+struct acpi_dev_table;
+
+struct acpi_dev_table *acpi_dev_table_first(void);
+struct acpi_dev_table *acpi_dev_table_next(struct acpi_dev_table *current);
+uint8_t *acpi_dev_table_data(struct acpi_dev_table *);
+unsigned acpi_dev_table_len(struct acpi_dev_table *);
+const char *acpi_dev_table_sig(struct acpi_dev_table *);
+uint8_t acpi_dev_table_rev(struct acpi_dev_table *);
+
+#endif /* QEMU_HW_ACPI_HOOKS_H */
-- 
1.8.3.1