mirror of
https://github.com/projectacrn/acrn-hypervisor.git
synced 2025-05-22 23:23:28 +00:00
3d5d6c96ec
there will be 3 types of vcpu runtime contexts: - runtime contexts always saved/restored during VM exit/entry, which include general registers rax/rcx/rdx/rbx/rbp/rsi/rdi/r8~r15, cr2 and msr for spectre control (ia32_spec_ctrl) - runtime contexts on-demand cached/updated during VM exit/entry, which include frequently used registers rsp, rip, efer, rflags, cr0 and cr4 - runtime contexts always read/write from/to VMCS, which include left registers not in above this patch add get/set register APIs for vcpu runtime contexts, and unified the save/restore method for them according to above description. v3: - update vcpu_get/set_cr0/4 as unified interface to get/set guest cr0/cr4, use on-demand cache for reading, but always write to VMCS for writing. v2: - use reg_cached/reg_updated for on-demand runtime contexts - always read/write cr3 from/to VMCS Signed-off-by: Jason Chen CJ <jason.cj.chen@intel.com> Acked-by: Eddie Dong <eddie.dong@intel.com>
137 lines
3.1 KiB
C
137 lines
3.1 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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#ifdef CONFIG_EFI_STUB
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#include <acrn_efi.h>
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#endif
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/* IOAPIC id */
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#define UEFI_IOAPIC_ID 8
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/* IOAPIC base address */
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#define UEFI_IOAPIC_ADDR 0xfec00000
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/* IOAPIC range size */
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#define UEFI_IOAPIC_SIZE 0x100000
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/* Local APIC base address */
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#define UEFI_LAPIC_ADDR 0xfee00000
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/* Local APIC range size */
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#define UEFI_LAPIC_SIZE 0x100000
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/* Number of PCI IRQ assignments */
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#define UEFI_PCI_IRQ_ASSIGNMENT_NUM 28
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#ifdef CONFIG_EFI_STUB
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static void efi_init(void);
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struct efi_ctx* 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) && vcpu->arch_vcpu.vlapic) {
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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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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->arch_vcpu.vlapic, &uefi_lapic_regs);
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vcpu->entry_addr = (void *)efi_ctx->rip;
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vcpu_set_gpreg(vcpu, CPU_REG_RAX, efi_ctx->rax);
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vcpu_set_gpreg(vcpu, CPU_REG_RBX, efi_ctx->rbx);
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vcpu_set_gpreg(vcpu, CPU_REG_RCX, efi_ctx->rcx);
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vcpu_set_gpreg(vcpu, CPU_REG_RDX, efi_ctx->rdx);
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vcpu_set_gpreg(vcpu, CPU_REG_RDI, efi_ctx->rdi);
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vcpu_set_gpreg(vcpu, CPU_REG_RSI, efi_ctx->rsi);
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vcpu_set_gpreg(vcpu, CPU_REG_RBP, efi_ctx->rbp);
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vcpu_set_gpreg(vcpu, CPU_REG_R8, efi_ctx->r8);
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vcpu_set_gpreg(vcpu, CPU_REG_R9, efi_ctx->r9);
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vcpu_set_gpreg(vcpu, CPU_REG_R10, efi_ctx->r10);
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vcpu_set_gpreg(vcpu, CPU_REG_R11, efi_ctx->r11);
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vcpu_set_gpreg(vcpu, CPU_REG_R12, efi_ctx->r12);
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vcpu_set_gpreg(vcpu, CPU_REG_R13, efi_ctx->r13);
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vcpu_set_gpreg(vcpu, CPU_REG_R14, efi_ctx->r14);
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vcpu_set_gpreg(vcpu, CPU_REG_R15, efi_ctx->r15);
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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(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 *)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_ctx *)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 = 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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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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