On Sun, Oct 19, 2014 at 04:43:07PM +0300, Gal Hammer wrote:
> Based on Microsoft's sepecifications (paper can be dowloaded from
> http://go.microsoft.com/fwlink/?LinkId=260709), add a device
> description to the SSDT ACPI table and its implementation.
>
> The GUID is set using a global "vmgenid.uuid" parameter.
>
> Signed-off-by: Gal Hammer <gham...@redhat.com>
>
> ---
> default-configs/i386-softmmu.mak | 1 +
> default-configs/x86_64-softmmu.mak | 1 +
> hw/acpi/core.c | 8 +++
> hw/acpi/ich9.c | 8 +++
> hw/acpi/piix4.c | 8 +++
> hw/i386/acpi-build.c | 8 +++
> hw/i386/acpi-dsdt.dsl | 4 +-
> hw/i386/acpi-dsdt.hex.generated | 6 +-
> hw/i386/pc.c | 8 +++
> hw/i386/q35-acpi-dsdt.dsl | 5 +-
> hw/i386/q35-acpi-dsdt.hex.generated | 8 +--
> hw/i386/ssdt-misc.dsl | 36 +++++++++++
> hw/i386/ssdt-misc.hex.generated | 8 +--
> hw/isa/lpc_ich9.c | 1 +
> hw/misc/Makefile.objs | 1 +
> hw/misc/vmgenid.c | 116
> +++++++++++++++++++++++++++++++++++
> include/hw/acpi/acpi.h | 2 +
> include/hw/acpi/acpi_dev_interface.h | 4 ++
> include/hw/acpi/ich9.h | 2 +
> include/hw/i386/pc.h | 3 +
> include/hw/misc/vmgenid.h | 21 +++++++
> 21 files changed, 246 insertions(+), 13 deletions(-)
> create mode 100644 hw/misc/vmgenid.c
> create mode 100644 include/hw/misc/vmgenid.h
Please document the host/guest API.
It seems that you are using a hard-coded hardware address,
and using up a GPE.
>
> 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/acpi/core.c b/hw/acpi/core.c
> index a7368fb..a01c980 100644
> --- a/hw/acpi/core.c
> +++ b/hw/acpi/core.c
> @@ -28,6 +28,8 @@
> #include "qapi-visit.h"
> #include "qapi-event.h"
>
> +#define ACPI_VM_GENERATION_ID_CHANGED_STATUS 1
> +
> struct acpi_table_header {
> uint16_t _length; /* our length, not actual part of the hdr */
> /* allows easier parsing for fw_cfg clients */
> @@ -680,3 +682,9 @@ void acpi_update_sci(ACPIREGS *regs, qemu_irq irq)
> (regs->pm1.evt.en & ACPI_BITMASK_TIMER_ENABLE) &&
> !(pm1a_sts & ACPI_BITMASK_TIMER_STATUS));
> }
> +
> +void acpi_vm_generation_id_changed(ACPIREGS *acpi_regs, qemu_irq irq)
> +{
> + acpi_regs->gpe.sts[0] |= ACPI_VM_GENERATION_ID_CHANGED_STATUS;
> + acpi_update_sci(acpi_regs, irq);
> +}
> diff --git a/hw/acpi/ich9.c b/hw/acpi/ich9.c
> index 7b14bbb..5501c0e 100644
> --- a/hw/acpi/ich9.c
> +++ b/hw/acpi/ich9.c
> @@ -316,3 +316,11 @@ void ich9_pm_ospm_status(AcpiDeviceIf *adev,
> ACPIOSTInfoList ***list)
>
> acpi_memory_ospm_status(&s->pm.acpi_memory_hotplug, list);
> }
> +
> +void ich9_vm_generation_id_changed(AcpiDeviceIf *adev)
> +{
> + ICH9LPCState *s = ICH9_LPC_DEVICE(adev);
> + ICH9LPCPMRegs *pm = &s->pm;
> +
> + acpi_vm_generation_id_changed(&pm->acpi_regs, pm->irq);
> +}
> diff --git a/hw/acpi/piix4.c b/hw/acpi/piix4.c
> index 0bfa814..ad0ef68 100644
> --- a/hw/acpi/piix4.c
> +++ b/hw/acpi/piix4.c
> @@ -580,6 +580,13 @@ static void piix4_ospm_status(AcpiDeviceIf *adev,
> ACPIOSTInfoList ***list)
> acpi_memory_ospm_status(&s->acpi_memory_hotplug, list);
> }
>
> +static void piix4_vm_generation_id_changed(AcpiDeviceIf *adev)
> +{
> + PIIX4PMState *s = PIIX4_PM(adev);
> +
> + acpi_vm_generation_id_changed(&s->ar, s->irq);
> +}
> +
> static Property piix4_pm_properties[] = {
> DEFINE_PROP_UINT32("smb_io_base", PIIX4PMState, smb_io_base, 0),
> DEFINE_PROP_UINT8(ACPI_PM_PROP_S3_DISABLED, PIIX4PMState, disable_s3, 0),
> @@ -617,6 +624,7 @@ static void piix4_pm_class_init(ObjectClass *klass, void
> *data)
> hc->plug = piix4_device_plug_cb;
> hc->unplug_request = piix4_device_unplug_request_cb;
> adevc->ospm_status = piix4_ospm_status;
> + adevc->vm_generation_id_changed = piix4_vm_generation_id_changed;
> }
>
> static const TypeInfo piix4_pm_info = {
> diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
> index 00be4bb..27d0494 100644
> --- a/hw/i386/acpi-build.c
> +++ b/hw/i386/acpi-build.c
> @@ -42,6 +42,7 @@
> #include "hw/acpi/memory_hotplug.h"
> #include "sysemu/tpm.h"
> #include "hw/acpi/tpm.h"
> +#include "hw/misc/vmgenid.h"
>
> /* Supported chipsets: */
> #include "hw/acpi/piix4.h"
> @@ -96,6 +97,7 @@ typedef struct AcpiMiscInfo {
> const unsigned char *dsdt_code;
> unsigned dsdt_size;
> uint16_t pvpanic_port;
> + bool vm_generation_id_set;
> } AcpiMiscInfo;
>
> typedef struct AcpiBuildPciBusHotplugState {
> @@ -216,6 +218,7 @@ static void acpi_get_misc_info(AcpiMiscInfo *info)
> info->has_hpet = hpet_find();
> info->has_tpm = tpm_find();
> info->pvpanic_port = pvpanic_port();
> + info->vm_generation_id_set = vm_generation_id_set();
> }
>
> static void acpi_get_pci_info(PcPciInfo *info)
> @@ -1088,6 +1091,11 @@ build_ssdt(GArray *table_data, GArray *linker,
> ACPI_BUILD_SET_LE(ssdt_ptr, sizeof(ssdp_misc_aml),
> ssdt_isa_pest[0], 16, misc->pvpanic_port);
>
> + if (!misc->vm_generation_id_set) {
> + ACPI_BUILD_SET_LE(ssdt_ptr, sizeof(ssdp_misc_aml),
> + ssdt_acpi_vm_gid_addr[0], 32, 0);
> + }
> +
> ACPI_BUILD_SET_LE(ssdt_ptr, sizeof(ssdp_misc_aml),
> ssdt_mctrl_nr_slots[0], 32, nr_mem);
>
> diff --git a/hw/i386/acpi-dsdt.dsl b/hw/i386/acpi-dsdt.dsl
> index 559f4b6..10b4afb 100644
> --- a/hw/i386/acpi-dsdt.dsl
> +++ b/hw/i386/acpi-dsdt.dsl
> @@ -307,7 +307,9 @@ DefinitionBlock (
> Scope(\_GPE) {
> Name(_HID, "ACPI0006")
>
> - Method(_L00) {
> + External(\_SB.VMGI, DeviceObj)
> + Method(_E00) {
> + Notify(\_SB.VMGI, 0x80)
> }
> Method(_E01) {
> // PCI hotplug event
> diff --git a/hw/i386/acpi-dsdt.hex.generated b/hw/i386/acpi-dsdt.hex.generated
> index a21bf41..3fd06d2 100644
> --- a/hw/i386/acpi-dsdt.hex.generated
> +++ b/hw/i386/acpi-dsdt.hex.generated
> @@ -8,7 +8,7 @@ static unsigned char AcpiDsdtAmlCode[] = {
> 0x0,
> 0x0,
> 0x1,
> -0x1f,
> +0x18,
> 0x42,
> 0x58,
> 0x50,
> @@ -32,8 +32,8 @@ static unsigned char AcpiDsdtAmlCode[] = {
> 0x54,
> 0x4c,
> 0x28,
> -0x5,
> -0x10,
> +0x8,
> +0x14,
> 0x20,
> 0x10,
> 0x49,
> diff --git a/hw/i386/pc.c b/hw/i386/pc.c
> index d045e8b..95ec233 100644
> --- a/hw/i386/pc.c
> +++ b/hw/i386/pc.c
> @@ -59,6 +59,7 @@
> #include "hw/pci/pci_host.h"
> #include "acpi-build.h"
> #include "hw/mem/pc-dimm.h"
> +#include "hw/misc/vmgenid.h"
> #include "trace.h"
> #include "qapi/visitor.h"
>
> @@ -1361,6 +1362,7 @@ void pc_basic_device_init(ISABus *isa_bus, qemu_irq
> *gsi,
> int i;
> DriveInfo *fd[MAX_FD];
> DeviceState *hpet = NULL;
> + DeviceState *vmgenid;
> int pit_isa_irq = 0;
> qemu_irq pit_alt_irq = NULL;
> qemu_irq rtc_irq = NULL;
> @@ -1459,6 +1461,12 @@ void pc_basic_device_init(ISABus *isa_bus, qemu_irq
> *gsi,
> fd[i] = drive_get(IF_FLOPPY, 0, i);
> }
> *floppy = fdctrl_init_isa(isa_bus, fd);
> +
> + vmgenid = qdev_try_create(NULL, VMGENID_DEVICE);
> + if (vmgenid) {
> + qdev_init_nofail(vmgenid);
> + sysbus_mmio_map(SYS_BUS_DEVICE(vmgenid), 0, VMGENID_BASE_ADDRESS);
> + }
> }
>
> void pc_nic_init(ISABus *isa_bus, PCIBus *pci_bus)
> diff --git a/hw/i386/q35-acpi-dsdt.dsl b/hw/i386/q35-acpi-dsdt.dsl
> index 054b035..b1d04e2 100644
> --- a/hw/i386/q35-acpi-dsdt.dsl
> +++ b/hw/i386/q35-acpi-dsdt.dsl
> @@ -415,7 +415,10 @@ DefinitionBlock (
> Scope(\_GPE) {
> Name(_HID, "ACPI0006")
>
> - Method(_L00) {
> + External(\_SB.VMGI, DeviceObj)
> + Method(_E00)
> + {
> + Notify(\_SB.VMGI, 0x80)
> }
> Method(_L01) {
> }
> diff --git a/hw/i386/q35-acpi-dsdt.hex.generated
> b/hw/i386/q35-acpi-dsdt.hex.generated
> index c9eb4ac..866e648 100644
> --- a/hw/i386/q35-acpi-dsdt.hex.generated
> +++ b/hw/i386/q35-acpi-dsdt.hex.generated
> @@ -8,7 +8,7 @@ static unsigned char Q35AcpiDsdtAmlCode[] = {
> 0x0,
> 0x0,
> 0x1,
> -0xb7,
> +0xac,
> 0x42,
> 0x58,
> 0x50,
> @@ -31,9 +31,9 @@ static unsigned char Q35AcpiDsdtAmlCode[] = {
> 0x4e,
> 0x54,
> 0x4c,
> -0x15,
> -0x11,
> -0x13,
> +0x28,
> +0x8,
> +0x14,
> 0x20,
> 0x10,
> 0x49,
> diff --git a/hw/i386/ssdt-misc.dsl b/hw/i386/ssdt-misc.dsl
> index 0fd4480..6ae09fb 100644
> --- a/hw/i386/ssdt-misc.dsl
> +++ b/hw/i386/ssdt-misc.dsl
> @@ -13,6 +13,7 @@
> * with this program; if not, see <http://www.gnu.org/licenses/>.
> */
> #include "hw/acpi/pc-hotplug.h"
> +#include "hw/misc/vmgenid.h"
>
> ACPI_EXTRACT_ALL_CODE ssdp_misc_aml
>
> @@ -118,6 +119,41 @@ DefinitionBlock ("ssdt-misc.aml", "SSDT", 0x01, "BXPC",
> "BXSSDTSUSP", 0x1)
> }
> }
>
> + Scope(\_SB) {
> + Device(VMGI) {
> + Name(_HID, "QEMU0002")
> + Name(_CID, "VM_Gen_Counter")
> + Name(_DDN, "VM_Gen_Counter")
> +
> + ACPI_EXTRACT_NAME_DWORD_CONST ssdt_acpi_vm_gid_addr
> + Name(VGIA, VMGENID_BASE_ADDRESS)
> +
> + OperationRegion(VGID, SystemMemory,
> + VMGENID_BASE_ADDRESS, VMGENID_BASE_ADDR_LEN)
> +
> + Name(_CRS, ResourceTemplate() {
> + Memory32Fixed(ReadOnly,
> + VMGENID_BASE_ADDRESS, VMGENID_BASE_ADDR_LEN)
> + })
> +
> + 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)
> + }
> + }
> + }
> +
> External(MEMORY_SLOT_NOTIFY_METHOD, MethodObj)
> Scope(\_SB.PCI0) {
> Device(MEMORY_HOTPLUG_DEVICE) {
> diff --git a/hw/i386/ssdt-misc.hex.generated b/hw/i386/ssdt-misc.hex.generated
> index ba4268a..f0b7a27 100644
> --- a/hw/i386/ssdt-misc.hex.generated
> +++ b/hw/i386/ssdt-misc.hex.generated
> @@ -26,7 +26,7 @@ static unsigned char ssdp_misc_aml[] = {
> 0x0,
> 0x0,
> 0x1,
> -0x8b,
> +0x80,
> 0x42,
> 0x58,
> 0x50,
> @@ -49,9 +49,9 @@ static unsigned char ssdp_misc_aml[] = {
> 0x4e,
> 0x54,
> 0x4c,
> -0x15,
> -0x11,
> -0x13,
> +0x28,
> +0x8,
> +0x14,
> 0x20,
> 0x10,
> 0x42,
> diff --git a/hw/isa/lpc_ich9.c b/hw/isa/lpc_ich9.c
> index 530b074..3a012fa 100644
> --- a/hw/isa/lpc_ich9.c
> +++ b/hw/isa/lpc_ich9.c
> @@ -678,6 +678,7 @@ static void ich9_lpc_class_init(ObjectClass *klass, void
> *data)
> hc->plug = ich9_device_plug_cb;
> hc->unplug_request = ich9_device_unplug_request_cb;
> adevc->ospm_status = ich9_pm_ospm_status;
> + adevc->vm_generation_id_changed = ich9_vm_generation_id_changed;
> }
>
> static const TypeInfo ich9_lpc_info = {
> 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..01aacd4
> --- /dev/null
> +++ b/hw/misc/vmgenid.c
> @@ -0,0 +1,116 @@
> +/*
> + * Virtual Machine Generation ID Device
> + *
> + * Copyright (C) 2014 Red Hat Inc.
> + *
> + * Authors: Gal Hammer <gham...@redhat.com>
> + *
> + * 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"
> +#include "hw/misc/vmgenid.h"
> +#include "hw/acpi/acpi_dev_interface.h"
> +
> +#define PROPERTY_UUID "uuid"
> +
> +#define VMGENID(obj) OBJECT_CHECK(VmGenIdState, (obj), VMGENID_DEVICE)
> +
> +typedef struct VmGenIdState {
> + SysBusDevice parent_obj;
> + MemoryRegion iomem;
> + uint8_t guid[16];
> + bool guid_set;
> +} VmGenIdState;
> +
> +bool vm_generation_id_set(void)
> +{
> + Object *obj = object_resolve_path_type("", VMGENID_DEVICE, NULL);
> + VmGenIdState *s = VMGENID(obj);
> +
> + if (!obj) {
> + return false;
> + }
> + return s->guid_set;
> +}
> +
> +static uint64_t vmgenid_ram_read(void *opaque, hwaddr addr,
> + unsigned size)
> +{
> + VmGenIdState *s = VMGENID(opaque);
> + uint64_t value;
> +
> + memcpy(&value, s->guid + addr, size);
> + return value;
> +}
> +
> +static const MemoryRegionOps vmgenid_ram_ops = {
> + .read = vmgenid_ram_read,
> + .valid = {
> + .min_access_size = 4,
> + .max_access_size = 4,
> + },
> + .endianness = DEVICE_NATIVE_ENDIAN,
> +};
> +
> +static void vmgenid_set_uuid(Object *obj, const char *value, Error **errp)
> +{
> + VmGenIdState *s = VMGENID(obj);
> + Object *acpi_obj;
> + bool first_set = !s->guid_set;
> +
> + if (qemu_uuid_parse(value, s->guid) < 0) {
> + error_setg(errp, "Fail to parse UUID string.");
> + return;
> + }
> + s->guid_set = true;
> +
> + /* Skip the acpi notification when setting the vm generation id for the
> + * first time. This is done because in a q35 machine the gpe register is
> + * allocated after the device is initialized. */
> + if (!first_set) {
> + acpi_obj = object_resolve_path_type("", TYPE_ACPI_DEVICE_IF, NULL);
> + if (acpi_obj) {
> + AcpiDeviceIfClass *adevc = ACPI_DEVICE_IF_GET_CLASS(acpi_obj);
> + AcpiDeviceIf *adev = ACPI_DEVICE_IF(acpi_obj);
> +
> + adevc->vm_generation_id_changed(adev);
> + }
> + }
> +}
> +
> +static void vmgenid_init(Object *obj)
> +{
> + SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
> + VmGenIdState *s = VMGENID(obj);
> +
> + memory_region_init_io(&s->iomem, obj, &vmgenid_ram_ops, s, "vgid", 16);
> + sysbus_init_mmio(sbd, &s->iomem);
This will cause an exit on each access to the GID.
I'm guessing this is too expensive.
> +
> + object_property_add_str(obj, PROPERTY_UUID, NULL, vmgenid_set_uuid,
> NULL);
> +}
> +
> +static void vmgenid_class_init(ObjectClass *klass, void *data)
> +{
> + DeviceClass *dc = DEVICE_CLASS(klass);
> +
> + 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),
> + .instance_init = vmgenid_init,
> + .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/acpi/acpi.h b/include/hw/acpi/acpi.h
> index 1f678b4..9373b4d 100644
> --- a/include/hw/acpi/acpi.h
> +++ b/include/hw/acpi/acpi.h
> @@ -185,4 +185,6 @@ unsigned acpi_table_len(void *current);
> void acpi_table_add(const QemuOpts *opts, Error **errp);
> void acpi_table_add_builtin(const QemuOpts *opts, Error **errp);
>
> +void acpi_vm_generation_id_changed(ACPIREGS *acpi_regs, qemu_irq irq);
> +
> #endif /* !QEMU_HW_ACPI_H */
> diff --git a/include/hw/acpi/acpi_dev_interface.h
> b/include/hw/acpi/acpi_dev_interface.h
> index f245f8d..757ce60 100644
> --- a/include/hw/acpi/acpi_dev_interface.h
> +++ b/include/hw/acpi/acpi_dev_interface.h
> @@ -28,6 +28,9 @@ typedef struct AcpiDeviceIf {
> * ospm_status: returns status of ACPI device objects, reported
> * via _OST method if device supports it.
> *
> + * vm_generation_id_changed: notify the guest that it generation
> + * id was changed.
> + *
> * Interface is designed for providing unified interface
> * to generic ACPI functionality that could be used without
> * knowledge about internals of actual device that implements
> @@ -39,5 +42,6 @@ typedef struct AcpiDeviceIfClass {
>
> /* <public> */
> void (*ospm_status)(AcpiDeviceIf *adev, ACPIOSTInfoList ***list);
> + void (*vm_generation_id_changed)(AcpiDeviceIf *adev);
> } AcpiDeviceIfClass;
> #endif
> diff --git a/include/hw/acpi/ich9.h b/include/hw/acpi/ich9.h
> index 7e42448..3b4eed5 100644
> --- a/include/hw/acpi/ich9.h
> +++ b/include/hw/acpi/ich9.h
> @@ -62,4 +62,6 @@ void ich9_pm_add_properties(Object *obj, ICH9LPCPMRegs *pm,
> Error **errp);
> void ich9_pm_device_plug_cb(ICH9LPCPMRegs *pm, DeviceState *dev, Error
> **errp);
>
> void ich9_pm_ospm_status(AcpiDeviceIf *adev, ACPIOSTInfoList ***list);
> +
> +void ich9_vm_generation_id_changed(AcpiDeviceIf *adev);
> #endif /* HW_ACPI_ICH9_H */
> diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
> index 1c2602e..87912b2 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_set(void);
> +
> /* e820 types */
> #define E820_RAM 1
> #define E820_RESERVED 2
> diff --git a/include/hw/misc/vmgenid.h b/include/hw/misc/vmgenid.h
> new file mode 100644
> index 0000000..3d44421
> --- /dev/null
> +++ b/include/hw/misc/vmgenid.h
> @@ -0,0 +1,21 @@
> +/*
> + * Virtual Machine Generation ID Device
> + *
> + * Copyright (C) 2014 Red Hat Inc.
> + *
> + * Authors: Gal Hammer <gham...@redhat.com>
> + *
> + * This work is licensed under the terms of the GNU GPL, version 2 or later.
> + * See the COPYING file in the top-level directory.
> + *
> + */
> +
> +#ifndef HW_MISC_VMGENID_H
> +#define HW_MISC_VMGENID_H
> +
> +#define VMGENID_DEVICE "vmgenid"
> +
> +#define VMGENID_BASE_ADDRESS 0xfedf0000
> +#define VMGENID_BASE_ADDR_LEN 16
> +
> +#endif
> --
> 1.9.3
