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https://github.com/projectacrn/acrn-hypervisor.git
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07f14401ec
efi_ctx is passed by EFI stub to hypervisor. The memory was allocated right after HV binary and marked as Efireserved. But HV is doing a 2MB alignment in init_paging() and might overwrite the efi_ctx struct or change the page table attribute. Now, EFI STUB uses Efiloaderdata type memory and the memory can be re-use by hypervisor/sos after boot time done. HV should save itself a copy if the content is still needed after init_paging(). Tracked-On: #2349 Signed-off-by: Chaohong guo <chaohong.guo@intel.com> Reviewed-by: Zheng, Gen <gen.zheng@intel.com>
76 lines
1.4 KiB
C
76 lines
1.4 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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#include <hypervisor.h>
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#include <multiboot.h>
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#include <boot_context.h>
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#include <vm0_boot.h>
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#ifdef CONFIG_EFI_STUB
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static struct efi_context efi_ctx;
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static struct lapic_regs uefi_lapic_regs;
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static int32_t efi_initialized;
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static void efi_init(void)
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{
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struct multiboot_info *mbi = NULL;
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if (boot_regs[0] != MULTIBOOT_INFO_MAGIC) {
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pr_err("no multiboot info found");
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} else {
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mbi = (struct multiboot_info *) hpa2hva(((uint64_t)(uint32_t)boot_regs[1]));
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if ((mbi->mi_flags & MULTIBOOT_INFO_HAS_DRIVES) == 0U) {
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pr_err("no multiboot drivers for uefi found");
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} else {
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memcpy_s(&efi_ctx, sizeof(struct efi_context), hpa2hva((uint64_t)mbi->mi_drives_addr), sizeof(struct efi_context));
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save_lapic(&uefi_lapic_regs);
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efi_initialized = 1;
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}
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}
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}
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void *get_rsdp_from_uefi(void)
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{
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if (!efi_initialized) {
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efi_init();
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}
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return hpa2hva((uint64_t)efi_ctx.rsdp);
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}
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void *get_ap_trampoline_buf(void)
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{
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return efi_ctx.ap_trampoline_buf;
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}
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const struct efi_context *get_efi_ctx(void)
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{
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return (const struct efi_context *)&efi_ctx;
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}
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const struct lapic_regs *get_efi_lapic_regs(void)
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{
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return &uefi_lapic_regs;
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}
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#endif
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void init_bsp(void)
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{
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#ifndef CONFIG_CONSTANT_ACPI
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acpi_fixup();
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#endif
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parse_hv_cmdline();
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#ifdef CONFIG_EFI_STUB
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if (!efi_initialized)
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efi_init();
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#endif
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}
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