1/* SPDX-License-Identifier: BSD-3-Clause */ 2#ifndef _LINUX_FW_CFG_H 3#define _LINUX_FW_CFG_H 4 5#include "standard-headers/linux/types.h" 6 7#define FW_CFG_ACPI_DEVICE_ID "QEMU0002" 8 9/* selector key values for "well-known" fw_cfg entries */ 10#define FW_CFG_SIGNATURE 0x00 11#define FW_CFG_ID 0x01 12#define FW_CFG_UUID 0x02 13#define FW_CFG_RAM_SIZE 0x03 14#define FW_CFG_NOGRAPHIC 0x04 15#define FW_CFG_NB_CPUS 0x05 16#define FW_CFG_MACHINE_ID 0x06 17#define FW_CFG_KERNEL_ADDR 0x07 18#define FW_CFG_KERNEL_SIZE 0x08 19#define FW_CFG_KERNEL_CMDLINE 0x09 20#define FW_CFG_INITRD_ADDR 0x0a 21#define FW_CFG_INITRD_SIZE 0x0b 22#define FW_CFG_BOOT_DEVICE 0x0c 23#define FW_CFG_NUMA 0x0d 24#define FW_CFG_BOOT_MENU 0x0e 25#define FW_CFG_MAX_CPUS 0x0f 26#define FW_CFG_KERNEL_ENTRY 0x10 27#define FW_CFG_KERNEL_DATA 0x11 28#define FW_CFG_INITRD_DATA 0x12 29#define FW_CFG_CMDLINE_ADDR 0x13 30#define FW_CFG_CMDLINE_SIZE 0x14 31#define FW_CFG_CMDLINE_DATA 0x15 32#define FW_CFG_SETUP_ADDR 0x16 33#define FW_CFG_SETUP_SIZE 0x17 34#define FW_CFG_SETUP_DATA 0x18 35#define FW_CFG_FILE_DIR 0x19 36 37#define FW_CFG_FILE_FIRST 0x20 38#define FW_CFG_FILE_SLOTS_MIN 0x10 39 40#define FW_CFG_WRITE_CHANNEL 0x4000 41#define FW_CFG_ARCH_LOCAL 0x8000 42#define FW_CFG_ENTRY_MASK (~(FW_CFG_WRITE_CHANNEL | FW_CFG_ARCH_LOCAL)) 43 44#define FW_CFG_INVALID 0xffff 45 46/* width in bytes of fw_cfg control register */ 47#define FW_CFG_CTL_SIZE 0x02 48 49/* fw_cfg "file name" is up to 56 characters (including terminating nul) */ 50#define FW_CFG_MAX_FILE_PATH 56 51 52/* size in bytes of fw_cfg signature */ 53#define FW_CFG_SIG_SIZE 4 54 55/* FW_CFG_ID bits */ 56#define FW_CFG_VERSION 0x01 57#define FW_CFG_VERSION_DMA 0x02 58 59/* fw_cfg file directory entry type */ 60struct fw_cfg_file { 61 uint32_t size; 62 uint16_t select; 63 uint16_t reserved; 64 char name[FW_CFG_MAX_FILE_PATH]; 65}; 66 67/* FW_CFG_DMA_CONTROL bits */ 68#define FW_CFG_DMA_CTL_ERROR 0x01 69#define FW_CFG_DMA_CTL_READ 0x02 70#define FW_CFG_DMA_CTL_SKIP 0x04 71#define FW_CFG_DMA_CTL_SELECT 0x08 72#define FW_CFG_DMA_CTL_WRITE 0x10 73 74#define FW_CFG_DMA_SIGNATURE 0x51454d5520434647ULL /* "QEMU CFG" */ 75 76/* Control as first field allows for different structures selected by this 77 * field, which might be useful in the future 78 */ 79struct fw_cfg_dma_access { 80 uint32_t control; 81 uint32_t length; 82 uint64_t address; 83}; 84 85#define FW_CFG_VMCOREINFO_FILENAME "etc/vmcoreinfo" 86 87#define FW_CFG_VMCOREINFO_FORMAT_NONE 0x0 88#define FW_CFG_VMCOREINFO_FORMAT_ELF 0x1 89 90struct fw_cfg_vmcoreinfo { 91 uint16_t host_format; 92 uint16_t guest_format; 93 uint32_t size; 94 uint64_t paddr; 95}; 96 97#endif 98