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https://github.com/projectacrn/acrn-hypervisor.git
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914341c9aa
In previous implementation we leave MAX_EFI_MMAP_ENTRIES in config tool and let end user to configure it. However it is hard for end user to understand how to configure it, also it is hard for board_inspector to get this value automatically because this info is only meaningful during the kernel boot stage and there is no such info available after boot in Linux toolset. This patch hardcode the value to 350, and ASSERT if the board need more efi mmap entries to run ACRN. User could modify the MAX_EFI_MMAP_ENTRIES macro in case ASSERT occurs in DEBUG stage. The More size of hv_memdesc[] only consume very little memory, the overhead is (size * sizeof(struct efi_memory_desc)), i.e. (size * 40) in bytes. Tracked-On: #6442 Signed-off-by: Victor Sun <victor.sun@intel.com> Acked-by: Eddie Dong <eddie.dong@Intel.com>
73 lines
2.0 KiB
C
73 lines
2.0 KiB
C
/*
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* Copyright (C) 2021 Intel Corporation.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <types.h>
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#include <boot.h>
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#include <efi.h>
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#include <efi_mmap.h>
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#include <logmsg.h>
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static uint32_t hv_memdesc_nr;
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static struct efi_memory_desc hv_memdesc[MAX_EFI_MMAP_ENTRIES];
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static void sort_efi_mmap_entries(void)
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{
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uint32_t i, j;
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struct efi_memory_desc tmp_memdesc;
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/* Bubble sort */
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for (i = 0U; i < (hv_memdesc_nr - 1U); i++) {
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for (j = 0U; j < (hv_memdesc_nr - i - 1U); j++) {
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if (hv_memdesc[j].phys_addr > hv_memdesc[j + 1U].phys_addr) {
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tmp_memdesc = hv_memdesc[j];
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hv_memdesc[j] = hv_memdesc[j + 1U];
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hv_memdesc[j + 1U] = tmp_memdesc;
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}
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}
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}
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}
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/**
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* @pre (uefi_info->memmap_size / uefi_info->memdesc_size) <= MAX_EFI_MMAP_ENTRIES
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*/
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void init_efi_mmap_entries(struct efi_info *uefi_info)
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{
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void *efi_memmap = (void *)((uint64_t)uefi_info->memmap | ((uint64_t)uefi_info->memmap_hi << 32U));
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struct efi_memory_desc *efi_memdesc = (struct efi_memory_desc *)efi_memmap;
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uint32_t entry = 0U;
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uint32_t efi_memdesc_nr = uefi_info->memmap_size / uefi_info->memdesc_size;
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ASSERT(efi_memdesc_nr <= MAX_EFI_MMAP_ENTRIES);
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while ((void *)efi_memdesc < (efi_memmap + uefi_info->memmap_size)) {
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hv_memdesc[entry] = *efi_memdesc;
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/* Per UEFI spec, EFI_MEMORY_DESCRIPTOR array element returned in MemoryMap.
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* The size is returned to allow for future expansion of the EFI_MEMORY_DESCRIPTOR
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* in response to hardware innovation. The structure of the EFI_MEMORY_DESCRIPTOR
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* may be extended in the future but it will remain backwards compatible with the
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* current definition. Thus OS software must use the DescriptorSize to find the
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* start of each EFI_MEMORY_DESCRIPTOR in the MemoryMap array.
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*/
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efi_memdesc = (struct efi_memory_desc *)((void *)efi_memdesc + uefi_info->memdesc_size);
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entry ++;
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}
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hv_memdesc_nr = entry;
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sort_efi_mmap_entries();
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}
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uint32_t get_efi_mmap_entries_count(void)
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{
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return hv_memdesc_nr;
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}
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const struct efi_memory_desc *get_efi_mmap_entry(void)
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{
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return hv_memdesc;
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}
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