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https://github.com/projectacrn/acrn-hypervisor.git
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b3b34fe2ad
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: #2035 Signed-off-by: Chaohong guo <chaohong.guo@intel.com>
116 lines
2.4 KiB
C
116 lines
2.4 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 void efi_init(void);
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struct efi_context efi_ctx;
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struct lapic_regs uefi_lapic_regs;
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static int32_t efi_initialized;
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void efi_spurious_handler(int32_t vector)
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{
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struct acrn_vcpu* vcpu;
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if (get_cpu_id() != 0)
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return;
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vcpu = per_cpu(vcpu, 0);
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if (vcpu != NULL) {
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vlapic_set_intr(vcpu, vector, 0);
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} else
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pr_err("%s vcpu or vlapic is not ready, interrupt lost\n",
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__func__);
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return;
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}
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int32_t uefi_sw_loader(struct acrn_vm *vm)
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{
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int32_t ret = 0;
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struct acrn_vcpu *vcpu = get_primary_vcpu(vm);
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struct acrn_vcpu_regs *vcpu_regs = &boot_context;
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ASSERT(vm != NULL, "Incorrect argument");
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pr_dbg("Loading guest to run-time location");
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vlapic_restore(vcpu_vlapic(vcpu), &uefi_lapic_regs);
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/* For UEFI platform, the bsp init regs come from two places:
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* 1. saved in efi_boot: gpregs, rip
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* 2. saved when HV started: other registers
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* We copy the info saved in efi_boot to boot_context and
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* init bsp with boot_context.
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*/
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memcpy_s(&(vcpu_regs->gprs), sizeof(struct acrn_gp_regs),
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&(efi_ctx.vcpu_regs.gprs), sizeof(struct acrn_gp_regs));
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vcpu_regs->rip = efi_ctx.vcpu_regs.rip;
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set_vcpu_regs(vcpu, vcpu_regs);
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/* defer irq enabling till vlapic is ready */
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CPU_IRQ_ENABLE();
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return ret;
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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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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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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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ASSERT(0, "no multiboot info found");
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mbi = (struct multiboot_info *)
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hpa2hva(((uint64_t)(uint32_t)boot_regs[1]));
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if (!(mbi->mi_flags & MULTIBOOT_INFO_HAS_DRIVES))
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ASSERT(0, "no multiboot drivers for uefi found");
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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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vm_sw_loader = uefi_sw_loader;
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spurious_handler = (spurious_handler_t)efi_spurious_handler;
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save_lapic(&uefi_lapic_regs);
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efi_initialized = 1;
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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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