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https://github.com/projectacrn/acrn-hypervisor.git
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1b3a75c984
We should not hardcode the VM ramdisk load address right after kernel load address because of two reasons: 1. Per Linux kernel boot protocol, the Kernel need a size of contiguous memory(i.e. init_size field in zeropage) from its load address to boot, then the address would overlap with ramdisk; 2. The hardcoded address could not be ensured as a valid address in guest e820 table, especially with a huge ramdisk; Also we should not hardcode the VM kernel load address to its pref_address which work for non-relocatable kernel only. For a relocatable kernel, it could run from any valid address where bootloader load to. The patch will set the VM kernel and ramdisk load address by scanning guest e820 table with find_space_from_ve820() api: 1. For SOS VM, the ramdisk has been loaded by multiboot bootloader already so set the load address as module source address, the relocatable kernel would be relocated to a appropriate address out space of hypervisor and boot modules to avoid guest memory copy corruption; 2. For pre-launched VM, the kernel would be loaded to pref_address first, then ramdisk will be put to a appropriate address out space of kernel according to guest memory layout and maximum ramdisk address limit under 4GB; Tracked-On: #5879 Signed-off-by: Victor Sun <victor.sun@intel.com> Reviewed-by: Jason Chen CJ <jason.cj.chen@intel.com>
77 lines
1.9 KiB
C
77 lines
1.9 KiB
C
/*
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* Copyright (C) 2018 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_std.h>
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#include <efi.h>
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#include <vm_configurations.h>
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/* TODO: MAX_MMAP_ENTRIES shall be config by config tool, and same as E820_MAX_ENTRIES */
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#define MAX_MMAP_ENTRIES 32U
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#define MAX_BOOTARGS_SIZE 2048U
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#define MAX_LOADER_NAME_SIZE 32U
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#define MAX_PROTOCOL_NAME_SIZE 16U
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#define MAX_MOD_STRING_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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struct abi_module {
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void *start; /* HVA */
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uint32_t size;
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const char string[MAX_MOD_STRING_SIZE];
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};
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/* ABI memory map types, compatible to Multiboot/Multiboot2/E820; */
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#define MMAP_TYPE_RAM 1U
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#define MMAP_TYPE_RESERVED 2U
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#define MMAP_TYPE_ACPI_RECLAIM 3U
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#define MMAP_TYPE_ACPI_NVS 4U
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#define MMAP_TYPE_UNUSABLE 5U
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struct abi_mmap {
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uint64_t baseaddr;
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uint64_t length;
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uint32_t type;
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};
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struct acrn_boot_info {
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char protocol_name[MAX_PROTOCOL_NAME_SIZE];
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const char cmdline[MAX_BOOTARGS_SIZE];
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const char loader_name[MAX_LOADER_NAME_SIZE];
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uint32_t mods_count;
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struct abi_module mods[MAX_MODULE_NUM];
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uint32_t mmap_entries;
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struct abi_mmap mmap_entry[MAX_MMAP_ENTRIES];
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const void *acpi_rsdp_va;
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struct efi_info uefi_info;
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};
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static inline bool boot_from_uefi(struct acrn_boot_info *abi)
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{
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return !((abi->uefi_info.systab == 0U) && (abi->uefi_info.systab_hi == 0U));
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}
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void get_boot_mods_range(uint64_t *p_start, uint64_t *p_end);
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int32_t init_multiboot_info(uint32_t *registers);
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void init_acrn_boot_info(uint32_t *registers);
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int32_t sanitize_acrn_boot_info(struct acrn_boot_info *abi);
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struct acrn_boot_info *get_acrn_boot_info(void);
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#endif /* BOOT_H */
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