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https://github.com/projectacrn/acrn-hypervisor.git
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34547e1e19
Previously we use a pre-defined structure as vACPI table for pre-launched VM, the structure is initialized by HV code. Now change the method to use a pre-loaded multiboot module instead. The module file will be generated by acrn-config tool and loaded to GPA 0x7ff00000, a hardcoded RSDP table at GPA 0x000f2400 will point to the XSDT table which at GPA 0x7ff00080; Tracked-On: #5266 Signed-off-by: Victor Sun <victor.sun@intel.com> Signed-off-by: Shuang Zheng <shuang.zheng@intel.com> Acked-by: Eddie Dong <eddie.dong@intel.com>
92 lines
2.5 KiB
C
92 lines
2.5 KiB
C
/*
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* Copyright (C) 2020 Intel Corporation. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef BOOT_H_
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#define BOOT_H_
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#include <multiboot.h>
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#ifdef CONFIG_MULTIBOOT2
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#include <multiboot2.h>
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#endif
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#include <e820.h>
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#include <zeropage.h>
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#include <vm_configurations.h>
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#define MAX_BOOTARGS_SIZE 2048U
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/* The modules in multiboot are: Pre-launched VM: kernel/ramdisk/acpi; SOS VM: kernel/ramdisk */
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#define MAX_MODULE_NUM (3U * PRE_VM_NUM + 2U * SOS_VM_NUM)
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/* The vACPI module size is fixed to 1MB */
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#define ACPI_MODULE_SIZE MEM_1M
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/* extended flags for acrn multiboot info from multiboot2 */
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#define MULTIBOOT_INFO_HAS_EFI_MMAP 0x00010000U
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#define MULTIBOOT_INFO_HAS_EFI64 0x00020000U
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struct acrn_multiboot_info {
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uint32_t mi_flags; /* the flags is back-compatible with multiboot1 */
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const char *mi_cmdline;
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const char *mi_loader_name;
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uint32_t mi_mods_count;
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const void *mi_mods_va;
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struct multiboot_module mi_mods[MAX_MODULE_NUM];
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uint32_t mi_drives_length;
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uint32_t mi_drives_addr;
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uint32_t mi_mmap_entries;
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const void *mi_mmap_va;
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struct multiboot_mmap mi_mmap_entry[E820_MAX_ENTRIES];
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const void *mi_acpi_rsdp_va;
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struct efi_info mi_efi_info;
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};
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/* boot_regs store the multiboot info magic and address */
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extern uint32_t boot_regs[2];
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extern char *efiloader_sig;
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static inline bool boot_from_multiboot1(void)
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{
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return ((boot_regs[0] == MULTIBOOT_INFO_MAGIC) && (boot_regs[1] != 0U));
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}
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#ifdef CONFIG_MULTIBOOT2
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/*
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* @post boot_regs[1] stores the address pointer that point to a valid multiboot2 info
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*/
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static inline bool boot_from_multiboot2(void)
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{
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/*
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* Multiboot spec states that the Multiboot information structure may be placed
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* anywhere in memory by the boot loader.
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*
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* Seems both SBL and GRUB won't place multiboot1 MBI structure at 0 address,
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* but GRUB could place Multiboot2 MBI structure at 0 address until commit
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* 0f3f5b7c13fa9b67 ("multiboot2: Set min address for mbi allocation to 0x1000")
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* which dates on Dec 26 2019.
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*/
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return (boot_regs[0] == MULTIBOOT2_INFO_MAGIC);
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}
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int32_t multiboot2_to_acrn_mbi(struct acrn_multiboot_info *mbi, void *mb2_info);
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#endif
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/*
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* The extern declaration for acrn_mbi is for cmdline.c use only, other functions should use
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* get_multiboot_info() API to access struct acrn_mbi because it has explict @post condition
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*/
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extern struct acrn_multiboot_info acrn_mbi;
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struct acrn_multiboot_info *get_multiboot_info(void);
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void init_acrn_multiboot_info(void);
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int32_t sanitize_multiboot_info(void);
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void parse_hv_cmdline(void);
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#endif /* BOOT_H_ */
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