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acrn-hypervisor/devicemodel/core/sw_load_vsbl.c

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/*-
* 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 <stdbool.h>
#include <stdint.h>
#include "dm.h"
#include "acrn_common.h"
#include "vmmapi.h"
#include "sw_load.h"
#include "acpi.h"
/* If the vsbl is loaded by DM, the UOS memory layout will be like:
*
* | ... |
* +--------------------------------------------------+
* | offset: 0xf2400 (ACPI table) |
* +--------------------------------------------------+
* | ... |
* +--------------------------------------------------+
* | offset: 16MB (vsbl image) |
* +--------------------------------------------------+
* | ... |
* +--------------------------------------------------+
* | offset: lowmem - 16K (partition blob) |
* +--------------------------------------------------+
* | offset: lowmem - 12K (e820 table) |
* +--------------------------------------------------+
* | offset: lowmem - 8K (boot_args_address) |
* +--------------------------------------------------+
* | offset: lowmem - 6K (vsbl entry address) |
* +--------------------------------------------------+
* | offset: lowmem - 4K (config_page with e820 table)|
* +--------------------------------------------------+
*/
/* Check default e820 table in sw_load_common.c for info about ctx->lowmem */
#define CONFIGPAGE_OFF(ctx) ((ctx)->lowmem - 4*KB)
#define VSBL_ENTRY_OFF(ctx) ((ctx)->lowmem - 6*KB)
#define BOOTARGS_OFF(ctx) ((ctx)->lowmem - 8*KB)
#define E820_TABLE_OFF(ctx) ((ctx)->lowmem - 12*KB)
#define GUEST_PART_INFO_OFF(ctx) ((ctx)->lowmem - 16*KB)
/* vsbl real entry is saved in the first 4 bytes of vsbl image */
#define VSBL_OFF(ctx) (16*MB)
struct vsbl_para {
uint64_t e820_table_address;
uint64_t e820_entries;
uint64_t acpi_table_address;
uint64_t acpi_table_size;
uint64_t guest_part_info_address;
uint64_t guest_part_info_size;
uint64_t vsbl_address;
uint64_t vsbl_size;
uint64_t bootargs_address;
uint32_t trusty_enabled;
uint32_t key_info_lock;
uint32_t watchdog_reset;
uint32_t boot_device_address;
};
static char guest_part_info_path[STR_LEN];
static int guest_part_info_size;
static bool with_guest_part_info;
static char vsbl_path[STR_LEN];
static int vsbl_size;
static int boot_blk_bdf;
#define LOW_8BIT(x) ((x) & 0xFF)
void
vsbl_set_bdf(int bnum, int snum, int fnum)
{
boot_blk_bdf = (LOW_8BIT(bnum) << 16) | (LOW_8BIT(snum) << 8) |
LOW_8BIT(fnum);
}
int
acrn_parse_guest_part_info(char *arg)
{
int len = strlen(arg);
if (len < STR_LEN) {
strncpy(guest_part_info_path, arg, len);
guest_part_info_path[len] = '\0';
assert(check_image(guest_part_info_path) == 0);
with_guest_part_info = true;
printf("SW_LOAD: get partition blob path %s\n",
guest_part_info_path);
return 0;
} else
return -1;
}
static int
acrn_prepare_guest_part_info(struct vmctx *ctx)
{
FILE *fp;
int len, read;
fp = fopen(guest_part_info_path, "r");
if (fp == NULL) {
fprintf(stderr,
"SW_LOAD ERR: could not open partition blob %s\n",
guest_part_info_path);
return -1;
}
fseek(fp, 0, SEEK_END);
len = ftell(fp);
if ((len + GUEST_PART_INFO_OFF(ctx)) > BOOTARGS_OFF(ctx)) {
fprintf(stderr,
"SW_LOAD ERR: too large partition blob\n");
fclose(fp);
return -1;
}
guest_part_info_size = len;
fseek(fp, 0, SEEK_SET);
read = fread(ctx->baseaddr + GUEST_PART_INFO_OFF(ctx),
sizeof(char), len, fp);
if (read < len) {
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 %d copy to guest 0x%lx\n",
guest_part_info_path, guest_part_info_size,
GUEST_PART_INFO_OFF(ctx));
return 0;
}
int
acrn_parse_vsbl(char *arg)
{
int len = strlen(arg);
if (len < STR_LEN) {
strncpy(vsbl_path, arg, len);
vsbl_path[len] = '\0';
assert(check_image(vsbl_path) == 0);
vsbl_file_name = vsbl_path;
printf("SW_LOAD: get vsbl path %s\n",
vsbl_path);
return 0;
} else
return -1;
}
static int
acrn_prepare_vsbl(struct vmctx *ctx)
{
FILE *fp;
int len, read;
fp = fopen(vsbl_path, "r");
if (fp == NULL) {
fprintf(stderr,
"SW_LOAD ERR: could not open vsbl file: %s\n",
vsbl_path);
return -1;
}
fseek(fp, 0, SEEK_END);
len = ftell(fp);
if ((len + VSBL_OFF(ctx)) > GUEST_PART_INFO_OFF(ctx)) {
fprintf(stderr,
"SW_LOAD ERR: too large vsbl file\n");
fclose(fp);
return -1;
}
vsbl_size = len;
fseek(fp, 0, SEEK_SET);
read = fread(ctx->baseaddr + VSBL_OFF(ctx),
sizeof(char), len, fp);
if (read < len) {
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 %d copy to guest 0x%lx\n",
vsbl_path, vsbl_size, VSBL_OFF(ctx));
return 0;
}
int
acrn_sw_load_vsbl(struct vmctx *ctx)
{
int ret;
struct e820_entry *e820;
struct vsbl_para *vsbl_para;
uint64_t vsbl_start_addr =
(uint64_t)ctx->baseaddr + VSBL_OFF(ctx);
uint64_t *vsbl_entry =
(uint64_t *)(ctx->baseaddr + VSBL_ENTRY_OFF(ctx));
uint64_t *cfg_offset =
(uint64_t *)(ctx->baseaddr + GUEST_CFG_OFFSET);
*cfg_offset = ctx->lowmem;
vsbl_para = (struct vsbl_para *)
(ctx->baseaddr + CONFIGPAGE_OFF(ctx));
memset(vsbl_para, 0x0, sizeof(struct vsbl_para));
e820 = (struct e820_entry *)
(ctx->baseaddr + E820_TABLE_OFF(ctx));
vsbl_para->e820_entries = acrn_create_e820_table(ctx, e820);
vsbl_para->e820_table_address = E820_TABLE_OFF(ctx);
vsbl_para->acpi_table_address = get_acpi_base();
vsbl_para->acpi_table_size = get_acpi_table_length();
if (with_bootargs) {
strcpy(ctx->baseaddr + BOOTARGS_OFF(ctx), get_bootargs());
vsbl_para->bootargs_address = BOOTARGS_OFF(ctx);
} else {
vsbl_para->bootargs_address = 0;
}
if (with_guest_part_info) {
ret = acrn_prepare_guest_part_info(ctx);
if (ret)
return ret;
vsbl_para->guest_part_info_address = GUEST_PART_INFO_OFF(ctx);
vsbl_para->guest_part_info_size = guest_part_info_size;
} else {
vsbl_para->guest_part_info_address = 0;
vsbl_para->guest_part_info_size = 0;
}
ret = acrn_prepare_vsbl(ctx);
if (ret)
return ret;
vsbl_para->vsbl_address = VSBL_OFF(ctx);
vsbl_para->vsbl_size = vsbl_size;
vsbl_para->e820_entries = add_e820_entry(e820, vsbl_para->e820_entries,
vsbl_para->vsbl_address, vsbl_size, E820_TYPE_RESERVED);
*vsbl_entry = *((uint32_t *) vsbl_start_addr);
vsbl_para->boot_device_address = boot_blk_bdf;
vsbl_para->trusty_enabled = trusty_enabled;
return 0;
}
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