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[Qemu-devel] [PATCH 2/2] i386: Add a Virtual Machine Generation ID devic
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From: |
Gal Hammer |
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Subject: |
[Qemu-devel] [PATCH 2/2] i386: Add a Virtual Machine Generation ID device. |
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Date: |
Tue, 2 Sep 2014 15:53:35 +0300 |
Based on Microsoft's sepecifications (paper can be dowloaded from
http://go.microsoft.com/fwlink/?LinkId=260709), add a device
description to the DSDT ACPI table.
The GUID is set using a new "vmgenid" device.
Signed-off-by: Gal Hammer <address@hidden>
---
default-configs/i386-softmmu.mak | 1 +
default-configs/x86_64-softmmu.mak | 1 +
hw/i386/acpi-build.c | 23 ++++++++++-
hw/i386/acpi-dsdt.dsl | 37 +++++++++++++++++
hw/misc/Makefile.objs | 1 +
hw/misc/vmgenid.c | 85 ++++++++++++++++++++++++++++++++++++++
include/hw/i386/pc.h | 3 ++
7 files changed, 149 insertions(+), 2 deletions(-)
create mode 100644 hw/misc/vmgenid.c
diff --git a/default-configs/i386-softmmu.mak b/default-configs/i386-softmmu.mak
index 8e08841..bd33c75 100644
--- a/default-configs/i386-softmmu.mak
+++ b/default-configs/i386-softmmu.mak
@@ -45,3 +45,4 @@ CONFIG_IOAPIC=y
CONFIG_ICC_BUS=y
CONFIG_PVPANIC=y
CONFIG_MEM_HOTPLUG=y
+CONFIG_VMGENID=y
diff --git a/default-configs/x86_64-softmmu.mak
b/default-configs/x86_64-softmmu.mak
index 66557ac..006fc7c 100644
--- a/default-configs/x86_64-softmmu.mak
+++ b/default-configs/x86_64-softmmu.mak
@@ -45,3 +45,4 @@ CONFIG_IOAPIC=y
CONFIG_ICC_BUS=y
CONFIG_PVPANIC=y
CONFIG_MEM_HOTPLUG=y
+CONFIG_VMGENID=y
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index 85e5834..153dadc 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -1390,15 +1390,34 @@ build_mcfg_q35(GArray *table_data, GArray *linker,
AcpiMcfgInfo *info)
static void
build_dsdt(GArray *table_data, GArray *linker, AcpiMiscInfo *misc)
{
- AcpiTableHeader *dsdt;
+ int dsdt_start = table_data->len;
+ uint8_t *dsdt;
+ uint8_t *vm_gid_ptr;
+ uint32_t vm_gid_physical_address;
assert(misc->dsdt_code && misc->dsdt_size);
dsdt = acpi_data_push(table_data, misc->dsdt_size);
memcpy(dsdt, misc->dsdt_code, misc->dsdt_size);
+ vm_gid_ptr = acpi_data_get_ptr(dsdt, misc->dsdt_size,
+ *dsdt_acpi_vm_gid, 16);
+ if (vm_generation_id(vm_gid_ptr)) {
+ vm_gid_physical_address = dsdt_start + *dsdt_acpi_vm_gid;
+ bios_linker_loader_add_pointer(linker, ACPI_BUILD_TABLE_FILE,
+ ACPI_BUILD_TABLE_FILE,
+ table_data,
+ dsdt + *dsdt_acpi_vm_gid_addr,
+ sizeof(uint32_t));
+ } else {
+ vm_gid_physical_address = 0;
+ }
+
+ ACPI_BUILD_SET_LE(dsdt, misc->dsdt_size,
+ *dsdt_acpi_vm_gid_addr, 32, vm_gid_physical_address);
+
memset(dsdt, 0, sizeof *dsdt);
- build_header(linker, table_data, dsdt, "DSDT",
+ build_header(linker, table_data, (AcpiTableHeader *)dsdt, "DSDT",
misc->dsdt_size, 1);
}
diff --git a/hw/i386/acpi-dsdt.dsl b/hw/i386/acpi-dsdt.dsl
index 559f4b6..9015881 100644
--- a/hw/i386/acpi-dsdt.dsl
+++ b/hw/i386/acpi-dsdt.dsl
@@ -294,6 +294,43 @@ DefinitionBlock (
}
}
+/****************************************************************
+ * Virtual Machine Generation ID Device
+ ****************************************************************/
+ Scope(\_SB) {
+
+ Device(VMGI) {
+ Name(_HID, "QEMU0002")
+ Name(_CID, "VM_Gen_Counter")
+ Name(_DDN, "VM_Gen_Counter")
+
+ ACPI_EXTRACT_NAME_DWORD_CONST dsdt_acpi_vm_gid_addr
+ Name(VGIA, 0x12345678)
+
+ ACPI_EXTRACT_NAME_BUFFER16 dsdt_acpi_vm_gid
+ Name(VGID, Buffer(16) {
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 })
+
+ Method(_STA, 0, NotSerialized) {
+ Store(VGIA, Local0)
+ If (LEqual(Local0, Zero)) {
+ Return (0x00)
+ } Else {
+ Return (0x0F)
+ }
+ }
+
+ Method(ADDR, 0, Serialized) {
+ Store(Package(2) { }, Local0)
+ Store(VGIA, Index(Local0, 0))
+ Store(0x0000, Index(Local0, 1))
+ return (Local0)
+ }
+ }
+ }
+
+
#include "hw/acpi/pc-hotplug.h"
#define CPU_STATUS_BASE PIIX4_CPU_HOTPLUG_IO_BASE
#include "acpi-dsdt-cpu-hotplug.dsl"
diff --git a/hw/misc/Makefile.objs b/hw/misc/Makefile.objs
index 979e532..c18b800 100644
--- a/hw/misc/Makefile.objs
+++ b/hw/misc/Makefile.objs
@@ -41,3 +41,4 @@ obj-$(CONFIG_SLAVIO) += slavio_misc.o
obj-$(CONFIG_ZYNQ) += zynq_slcr.o
obj-$(CONFIG_PVPANIC) += pvpanic.o
+obj-$(CONFIG_VMGENID) += vmgenid.o
diff --git a/hw/misc/vmgenid.c b/hw/misc/vmgenid.c
new file mode 100644
index 0000000..76956d1
--- /dev/null
+++ b/hw/misc/vmgenid.c
@@ -0,0 +1,85 @@
+/*
+ * Virtual Machine Generation ID Device
+ *
+ * Copyright (C) 2014 Red Hat Inc.
+ *
+ * Authors: Gal Hammer <address@hidden>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#include "hw/i386/pc.h"
+#include "hw/sysbus.h"
+
+#define VMGENID_DEVICE "vmgenid"
+
+#define PROPERTY_UUID "uuid"
+
+#define VMGENID(obj) OBJECT_CHECK(VmGenIdState, (obj), VMGENID_DEVICE)
+
+typedef struct VmGenIdState {
+ SysBusDevice parent_obj;
+ char *guid_arg;
+} VmGenIdState;
+
+bool vm_generation_id(uint8_t id[16])
+{
+ Object *o = object_resolve_path_type("", VMGENID_DEVICE, NULL);
+ char *guid;
+
+ if (!o) {
+ return false;
+ }
+ guid = object_property_get_str(o, PROPERTY_UUID, NULL);
+ /* actual uuid validation was checked during realize. */
+ (void)qemu_uuid_parse(guid, id);
+ return true;
+}
+
+static void vmgenid_realize(DeviceState *dev, Error **errp)
+{
+ VmGenIdState *s = VMGENID(dev);
+ uint8_t id[16];
+
+ if (!s->guid_arg) {
+ error_setg(errp, "missing uuid.");
+ return;
+ }
+
+ if (qemu_uuid_parse(s->guid_arg, id) < 0) {
+ error_setg(errp, "Fail to parse UUID string.");
+ return;
+ }
+}
+
+static Property vmgenid_device_properties[] = {
+ DEFINE_PROP_STRING(PROPERTY_UUID, VmGenIdState, guid_arg),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void vmgenid_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+
+ dc->realize = vmgenid_realize;
+ dc->props = vmgenid_device_properties;
+ dc->cannot_instantiate_with_device_add_yet = false;
+ set_bit(DEVICE_CATEGORY_MISC, dc->categories);
+}
+
+static const TypeInfo vmgenid_device_info = {
+ .name = VMGENID_DEVICE,
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_size = sizeof(VmGenIdState),
+ .class_init = vmgenid_class_init,
+};
+
+static void vmgenid_register_types(void)
+{
+ type_register_static(&vmgenid_device_info);
+}
+
+type_init(vmgenid_register_types)
+
diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index a39cb42..b21c22e 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -290,6 +290,9 @@ void pc_system_firmware_init(MemoryRegion *rom_memory,
/* pvpanic.c */
uint16_t pvpanic_port(void);
+/* vmgenid.c */
+bool vm_generation_id(uint8_t id[16]);
+
/* e820 types */
#define E820_RAM 1
#define E820_RESERVED 2
--
1.9.3