This ACPI table is supposed to carry various parameters for OSPM. We introduce it with a single parameter field, "vmgenid_addr_base_ptr", which is described as ADBP / "ADDR base pointer" in "docs/vmgenid.txt" (along with the general structure of the table).
Cc: Paolo Bonzini <pbonz...@redhat.com> Cc: Gal Hammer <gham...@redhat.com> Cc: Igor Mammedov <imamm...@redhat.com> Cc: "Michael S. Tsirkin" <m...@redhat.com> Signed-off-by: Laszlo Ersek <ler...@redhat.com> --- include/hw/acpi/vmgenid.h | 72 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 72 insertions(+) create mode 100644 include/hw/acpi/vmgenid.h diff --git a/include/hw/acpi/vmgenid.h b/include/hw/acpi/vmgenid.h new file mode 100644 index 0000000..07e813a --- /dev/null +++ b/include/hw/acpi/vmgenid.h @@ -0,0 +1,72 @@ +/* + * ACPI definitions related to the VMGENID device (see "docs/vmgenid.txt"). + * + * Copyright (C) 2015 Red Hat, Inc. + * + * Authors: + * Laszlo Ersek <ler...@redhat.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation; either version 2 of the License, or (at your option) + * any later version. + * + * This program 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 General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program; if not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef HW_ACPI_VMGENID_H +#define HW_ACPI_VMGENID_H + +#include "hw/acpi/acpi-defs.h" + +#define ACPI_UEFI_IDENT_SIZE 16 + +struct AcpiQemuParamTable { + /* ACPI common table header */ + ACPI_TABLE_HEADER_DEF + + /* + * UEFI ACPI Data Table Sub-Header. + * + * The "UEFI" signature is reserved for this table header starting with + * ACPI 4.0. The header structure is described in the UEFI Specification, + * version 2.3 or later, in Appendix O. + + * These fields are harmless for SeaBIOS, but ensure unicity in OVMF + * ("UEFI" is a multi-instance table type). + */ + uint8_t identifier[ACPI_UEFI_IDENT_SIZE]; + uint16_t data_offset; + + /* QEMU-specific fields start here. */ + + /* Base pointer for the VMGENID device's ADDR control method. */ + uint64_t vmgenid_addr_base_ptr; +} QEMU_PACKED; +typedef struct AcpiQemuParamTable AcpiQemuParamTable; + +/* Aggregate initializer for "AcpiQemuParamTable.identifier". */ +#define QEMU_PARAM_TABLE_GUID { 0xFF, 0x5D, 0x7A, 0x41, 0x4B, 0xBF, 0xBC, 0x4A, \ + 0xA8, 0x39, 0x65, 0x93, 0xBB, 0x41, 0xF4, 0x52 } + +/* + * This offset points into the fw_cfg blob that contains both + * AcpiQemuParamTable and the "live" generation ID after it. The offset points + * at the generation ID field, skipping over the "OVMF SDT Header probe + * suppressor" and "VMGenID alignment padding" fields in the blob (which are + * located right after AcpiQemuParamTable). + * + * This is an integer constant expression. + */ +#define VM_GENERATION_ID_OFFSET \ + ROUND_UP(sizeof(AcpiQemuParamTable) + sizeof(AcpiTableHeader), 8) + +#define VM_GENERATION_ID_SIZE 16 + +#endif /* HW_ACPI_VMGENID_H */ -- 1.8.3.1
