mirror of
https://github.com/projectacrn/acrn-hypervisor.git
synced 2025-12-01 13:23:15 +00:00
a5fc3e5eac
NOTE: this patch is only workaround patch for UOS BSP state init. Eventually, the DM will call hypercall to init UOS BSP state. We use this workaround patch here to simplify the init_guest_state. Will make the caller of init_guest_state calls init_guest_vmx directly. Tracked-On: #1231 Signed-off-by: Yin Fengwei <fengwei.yin@intel.com> Acked-by: Eddie Dong <eddie.dong@intel.com>
122 lines
2.5 KiB
C
122 lines
2.5 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 <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 = NULL;
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struct lapic_regs uefi_lapic_regs;
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static int efi_initialized;
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void efi_spurious_handler(int vector)
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{
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struct vcpu* vcpu;
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int ret;
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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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ret = vlapic_set_intr(vcpu, vector, 0);
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if (ret != 0)
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pr_err("%s vlapic set intr fail, interrupt lost\n",
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__func__);
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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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int uefi_sw_loader(struct vm *vm, struct vcpu *vcpu)
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{
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int ret = 0;
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struct acrn_vcpu_regs *vcpu_regs = &vm0_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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if (!is_vm0(vm))
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return load_guest(vm, vcpu);
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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 vm0_boot_context and
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* init bsp with vm0_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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efi_ctx = (struct efi_context *)hpa2hva((uint64_t)mbi->mi_drives_addr);
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ASSERT(efi_ctx != NULL, "no uefi context found");
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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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