dm: add option to boot OVMF from acrn-dm

Use '--ovmf <OVMF image location>' when launching acrn-dm.

Tracked-On: #1832
Signed-off-by: Peter Fang <peter.fang@intel.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>

devicemodel/core/sw_load_ovmf.c

@@ -0,0 +1,158 @@
+/*-
+ * Copyright (c) 2018 Intel Corporation
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ */
+
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+
+#include "dm.h"
+#include "vmmapi.h"
+#include "sw_load.h"
+
+
+/*                 ovmf binary layout:
+ *
+ * +--------------------------------------------------+ <--OVMF Top
+ * |             |offset: Top - 0x10 (reset vector)   |
+ * + SECFV       |------------------------------------+
+ * |             |other                               |
+ * +--------------------------------------------------+
+ * |                                                  |
+ * + FVMAIN_COMPACT                                   +
+ * |                                                  |
+ * +--------------------------------------------------+
+ * |                                                  |
+ * + NV data storage                                  +
+ * |                                                  |
+ * +--------------------------------------------------+
+ */
+
+/* ovmf real entry is reset vector, which is (OVMF_TOP - 16) */
+#define	OVMF_TOP(ctx)		(4*GB)
+
+static char ovmf_path[STR_LEN];
+static size_t ovmf_size;
+
+extern int init_cmos_vrpmb(struct vmctx *ctx);
+
+size_t
+ovmf_image_size(void)
+{
+	return ovmf_size;
+}
+
+int
+acrn_parse_ovmf(char *arg)
+{
+	int error;
+	size_t len = strlen(arg);
+
+	if (len < STR_LEN) {
+		strncpy(ovmf_path, arg, len + 1);
+		error = check_image(ovmf_path, 2 * MB, &ovmf_size);
+		assert(!error);
+
+		ovmf_file_name = ovmf_path;
+		printf("SW_LOAD: get ovmf path %s, size 0x%lx\n",
+		       ovmf_path, ovmf_size);
+		return 0;
+	} else
+		return -1;
+}
+
+static int
+acrn_prepare_ovmf(struct vmctx *ctx)
+{
+	FILE *fp;
+	size_t read;
+
+	fp = fopen(ovmf_path, "r");
+	if (fp == NULL) {
+		fprintf(stderr,
+			"SW_LOAD ERR: could not open ovmf file: %s\n",
+			ovmf_path);
+		return -1;
+	}
+
+	fseek(fp, 0, SEEK_END);
+
+	if (ftell(fp) != ovmf_size) {
+		fprintf(stderr,
+			"SW_LOAD ERR: ovmf file changed\n");
+		fclose(fp);
+		return -1;
+	}
+
+	fseek(fp, 0, SEEK_SET);
+	read = fread(ctx->baseaddr + OVMF_TOP(ctx) - ovmf_size,
+		sizeof(char), ovmf_size, fp);
+
+	if (read < ovmf_size) {
+		fprintf(stderr,
+			"SW_LOAD ERR: could not read whole partition blob\n");
+		fclose(fp);
+		return -1;
+	}
+
+	fclose(fp);
+	printf("SW_LOAD: partition blob %s size %lu copy to guest 0x%lx\n",
+		ovmf_path, ovmf_size, OVMF_TOP(ctx) - ovmf_size);
+
+	return 0;
+}
+
+int
+acrn_sw_load_ovmf(struct vmctx *ctx)
+{
+	int ret;
+
+	init_cmos_vrpmb(ctx);
+
+	ret = acrn_prepare_ovmf(ctx);
+
+	if (ret)
+		return ret;
+
+	printf("SW_LOAD: ovmf_entry 0x%lx\n", OVMF_TOP(ctx) - 16);
+
+	/* set guest bsp state. Will call hypercall set bsp state
+	 * after bsp is created.
+	 */
+	memset(&ctx->bsp_regs, 0, sizeof(struct acrn_set_vcpu_regs));
+	ctx->bsp_regs.vcpu_id = 0;
+
+	/* CR0_ET | CR0_NE */
+	ctx->bsp_regs.vcpu_regs.cr0 = 0x30U;
+	ctx->bsp_regs.vcpu_regs.cs_ar = 0x009FU;
+	ctx->bsp_regs.vcpu_regs.cs_sel = 0xF000U;
+	ctx->bsp_regs.vcpu_regs.cs_limit = 0xFFFFU;
+	ctx->bsp_regs.vcpu_regs.cs_base = (OVMF_TOP(ctx) - 16) & 0xFFFF0000UL;
+	ctx->bsp_regs.vcpu_regs.rip = (OVMF_TOP(ctx) - 16) & 0xFFFFUL;
+
+	return 0;
+}