159 lines
4.3 KiB
C
159 lines
4.3 KiB
C
/*-
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* Copyright (c) 2018 Intel Corporation
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <assert.h>
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#include "dm.h"
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#include "vmmapi.h"
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#include "sw_load.h"
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/* ovmf binary layout:
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*
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* +--------------------------------------------------+ <--OVMF Top
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* | |offset: Top - 0x10 (reset vector) |
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* + SECFV |------------------------------------+
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* | |other |
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* +--------------------------------------------------+
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* | |
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* + FVMAIN_COMPACT +
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* | |
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* +--------------------------------------------------+
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* | |
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* + NV data storage +
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* | |
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* +--------------------------------------------------+
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*/
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/* ovmf real entry is reset vector, which is (OVMF_TOP - 16) */
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#define OVMF_TOP(ctx) (4*GB)
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static char ovmf_path[STR_LEN];
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static size_t ovmf_size;
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extern int init_cmos_vrpmb(struct vmctx *ctx);
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size_t
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ovmf_image_size(void)
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{
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return ovmf_size;
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}
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int
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acrn_parse_ovmf(char *arg)
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{
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int error;
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size_t len = strnlen(arg, STR_LEN);
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if (len < STR_LEN) {
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strncpy(ovmf_path, arg, len + 1);
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error = check_image(ovmf_path, 2 * MB, &ovmf_size);
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assert(!error);
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ovmf_file_name = ovmf_path;
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printf("SW_LOAD: get ovmf path %s, size 0x%lx\n",
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ovmf_path, ovmf_size);
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return 0;
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} else
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return -1;
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}
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static int
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acrn_prepare_ovmf(struct vmctx *ctx)
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{
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FILE *fp;
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size_t read;
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fp = fopen(ovmf_path, "r");
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if (fp == NULL) {
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fprintf(stderr,
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"SW_LOAD ERR: could not open ovmf file: %s\n",
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ovmf_path);
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return -1;
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}
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fseek(fp, 0, SEEK_END);
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if (ftell(fp) != ovmf_size) {
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fprintf(stderr,
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"SW_LOAD ERR: ovmf file changed\n");
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fclose(fp);
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return -1;
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}
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fseek(fp, 0, SEEK_SET);
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read = fread(ctx->baseaddr + OVMF_TOP(ctx) - ovmf_size,
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sizeof(char), ovmf_size, fp);
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if (read < ovmf_size) {
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fprintf(stderr,
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"SW_LOAD ERR: could not read whole partition blob\n");
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fclose(fp);
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return -1;
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}
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fclose(fp);
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printf("SW_LOAD: partition blob %s size %lu copy to guest 0x%lx\n",
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ovmf_path, ovmf_size, OVMF_TOP(ctx) - ovmf_size);
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return 0;
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}
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int
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acrn_sw_load_ovmf(struct vmctx *ctx)
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{
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int ret;
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init_cmos_vrpmb(ctx);
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ret = acrn_prepare_ovmf(ctx);
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if (ret)
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return ret;
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printf("SW_LOAD: ovmf_entry 0x%lx\n", OVMF_TOP(ctx) - 16);
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/* set guest bsp state. Will call hypercall set bsp state
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* after bsp is created.
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*/
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memset(&ctx->bsp_regs, 0, sizeof(struct acrn_set_vcpu_regs));
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ctx->bsp_regs.vcpu_id = 0;
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/* CR0_ET | CR0_NE */
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ctx->bsp_regs.vcpu_regs.cr0 = 0x30U;
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ctx->bsp_regs.vcpu_regs.cs_ar = 0x009FU;
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ctx->bsp_regs.vcpu_regs.cs_sel = 0xF000U;
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ctx->bsp_regs.vcpu_regs.cs_limit = 0xFFFFU;
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ctx->bsp_regs.vcpu_regs.cs_base = (OVMF_TOP(ctx) - 16) & 0xFFFF0000UL;
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ctx->bsp_regs.vcpu_regs.rip = (OVMF_TOP(ctx) - 16) & 0xFFFFUL;
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return 0;
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}
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