Release 4.17 include/uapi/linux/qemu_fw_cfg.h

/* SPDX-License-Identifier: BSD-3-Clause */
#ifndef _LINUX_FW_CFG_H

#define _LINUX_FW_CFG_H

#include <linux/types.h>


#define FW_CFG_ACPI_DEVICE_ID	"QEMU0002"

/* selector key values for "well-known" fw_cfg entries */

#define FW_CFG_SIGNATURE	0x00

#define FW_CFG_ID		0x01

#define FW_CFG_UUID		0x02

#define FW_CFG_RAM_SIZE		0x03

#define FW_CFG_NOGRAPHIC	0x04

#define FW_CFG_NB_CPUS		0x05

#define FW_CFG_MACHINE_ID	0x06

#define FW_CFG_KERNEL_ADDR	0x07

#define FW_CFG_KERNEL_SIZE	0x08

#define FW_CFG_KERNEL_CMDLINE	0x09

#define FW_CFG_INITRD_ADDR	0x0a

#define FW_CFG_INITRD_SIZE	0x0b

#define FW_CFG_BOOT_DEVICE	0x0c

#define FW_CFG_NUMA		0x0d

#define FW_CFG_BOOT_MENU	0x0e

#define FW_CFG_MAX_CPUS		0x0f

#define FW_CFG_KERNEL_ENTRY	0x10

#define FW_CFG_KERNEL_DATA	0x11

#define FW_CFG_INITRD_DATA	0x12

#define FW_CFG_CMDLINE_ADDR	0x13

#define FW_CFG_CMDLINE_SIZE	0x14

#define FW_CFG_CMDLINE_DATA	0x15

#define FW_CFG_SETUP_ADDR	0x16

#define FW_CFG_SETUP_SIZE	0x17

#define FW_CFG_SETUP_DATA	0x18

#define FW_CFG_FILE_DIR		0x19


#define FW_CFG_FILE_FIRST	0x20

#define FW_CFG_FILE_SLOTS_MIN	0x10


#define FW_CFG_WRITE_CHANNEL	0x4000

#define FW_CFG_ARCH_LOCAL	0x8000

#define FW_CFG_ENTRY_MASK	(~(FW_CFG_WRITE_CHANNEL | FW_CFG_ARCH_LOCAL))


#define FW_CFG_INVALID		0xffff

/* width in bytes of fw_cfg control register */

#define FW_CFG_CTL_SIZE		0x02

/* fw_cfg "file name" is up to 56 characters (including terminating nul) */

#define FW_CFG_MAX_FILE_PATH	56

/* size in bytes of fw_cfg signature */

#define FW_CFG_SIG_SIZE 4

/* FW_CFG_ID bits */

#define FW_CFG_VERSION		0x01

#define FW_CFG_VERSION_DMA	0x02

/* fw_cfg file directory entry type */

struct fw_cfg_file {
	
__be32 size;
	
__be16 select;
	
__u16 reserved;
	
char name[FW_CFG_MAX_FILE_PATH];
};

/* FW_CFG_DMA_CONTROL bits */

#define FW_CFG_DMA_CTL_ERROR	0x01

#define FW_CFG_DMA_CTL_READ	0x02

#define FW_CFG_DMA_CTL_SKIP	0x04

#define FW_CFG_DMA_CTL_SELECT	0x08

#define FW_CFG_DMA_CTL_WRITE	0x10


#define FW_CFG_DMA_SIGNATURE    0x51454d5520434647ULL 
/* "QEMU CFG" */

/* Control as first field allows for different structures selected by this
 * field, which might be useful in the future
 */

struct fw_cfg_dma_access {
	
__be32 control;
	
__be32 length;
	
__be64 address;
};


#define FW_CFG_VMCOREINFO_FILENAME "etc/vmcoreinfo"


#define FW_CFG_VMCOREINFO_FORMAT_NONE 0x0

#define FW_CFG_VMCOREINFO_FORMAT_ELF 0x1


struct fw_cfg_vmcoreinfo {
	
__le16 host_format;
	
__le16 guest_format;
	
__le32 size;
	
__le64 paddr;
};

#endif
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