1 /* SPDX-License-Identifier: BSD-3-Clause */ 2 #ifndef _LINUX_FW_CFG_H 3 #define _LINUX_FW_CFG_H 4 5 #include <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 */ 60 struct fw_cfg_file { 61 __be32 size; 62 __be16 select; 63 __u16 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 */ 79 struct fw_cfg_dma_access { 80 __be32 control; 81 __be32 length; 82 __be64 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 90 struct fw_cfg_vmcoreinfo { 91 __le16 host_format; 92 __le16 guest_format; 93 __le32 size; 94 __le64 paddr; 95 }; 96 97 #endif 98
