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internal commit: 0ab1ea615e5cfbb0687a9d593a86a7b774386076

Signed-off-by: Anthony Xu <anthony.xu@intel.com>
This commit is contained in:
Anthony Xu
2018-03-07 21:01:19 +08:00
committed by lijinxia
parent b966397914
commit bd31b1c53e
93 changed files with 37861 additions and 0 deletions
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devicemodel/core/sw_load.c Normal file
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/*-
* Copyright (c) 2017 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 "acrn_common.h"
#include "vmmapi.h"
#define STR_LEN 1024
#define SETUP_SIG 0x5a5aaa55
#define KB (1024UL)
#define MB (1024 * 1024UL)
#define GB (1024 * 1024 * 1024UL)
/* E820 memory types */
#define E820_TYPE_RAM 1 /* EFI 1, 2, 3, 4, 5, 6, 7 */
/* EFI 0, 11, 12, 13 (everything not used elsewhere) */
#define E820_TYPE_RESERVED 2
#define E820_TYPE_ACPI_RECLAIM 3 /* EFI 9 */
#define E820_TYPE_ACPI_NVS 4 /* EFI 10 */
#define E820_TYPE_UNUSABLE 5 /* EFI 8 */
#define NUM_E820_ENTRIES 4
#define LOWRAM_E820_ENTRIES 0
#define HIGHRAM_E820_ENTRIES 3
/* see below e820 default mapping for more info about ctx->lowmem */
#define RAMDISK_LOAD_OFF(ctx) (ctx->lowmem - 4*MB)
#define BOOTARGS_LOAD_OFF(ctx) (ctx->lowmem - 8*KB)
#define KERNEL_ENTRY_OFF(ctx) (ctx->lowmem - 6*KB)
#define ZEROPAGE_LOAD_OFF(ctx) (ctx->lowmem - 4*KB)
#define KERNEL_LOAD_OFF(ctx) (16*MB)
/* Defines a single entry in an E820 memory map. */
struct e820_entry {
/** The base address of the memory range. */
uint64_t baseaddr;
/** The length of the memory range. */
uint64_t length;
/** The type of memory region. */
uint32_t type;
} __attribute__((packed));
/* The real mode kernel header, refer to Documentation/x86/boot.txt */
struct _zeropage {
uint8_t pad1[0x1e8]; /* 0x000 */
uint8_t e820_nentries; /* 0x1e8 */
uint8_t pad2[0x8]; /* 0x1e9 */
struct {
uint8_t hdr_pad1[0x1f]; /* 0x1f1 */
uint8_t loader_type; /* 0x210 */
uint8_t load_flags; /* 0x211 */
uint8_t hdr_pad2[0x2]; /* 0x212 */
uint32_t code32_start; /* 0x214 */
uint32_t ramdisk_addr; /* 0x218 */
uint32_t ramdisk_size; /* 0x21c */
uint8_t hdr_pad3[0x8]; /* 0x220 */
uint32_t bootargs_addr; /* 0x228 */
uint8_t hdr_pad4[0x3c]; /* 0x22c */
} __attribute__((packed)) hdr;
uint8_t pad3[0x68]; /* 0x268 */
struct e820_entry e820[0x80]; /* 0x2d0 */
uint8_t pad4[0x330]; /* 0xcd0 */
} __attribute__((packed));
static char bootargs[STR_LEN];
static char ramdisk_path[STR_LEN];
static char kernel_path[STR_LEN];
static int with_bootargs;
static int with_ramdisk;
static int with_kernel;
static int ramdisk_size;
static int kernel_size;
/*
* Default e820 mem map:
*
* there is reserved memory hole for PCI hole and APIC etc
* so the memory layout could be separated into lowmem & highmem.
* - if request memory size <= ctx->lowmem_limit, then there is only
* map[0]:0~ctx->lowmem for RAM
* ctx->lowmem = request_memory_size
* - if request memory size > ctx->lowmem_limit, then there are
* map[0]:0~ctx->lowmem_limit & map[2]:4G~ctx->highmem for RAM
* ctx->highmem = request_memory_size - ctx->lowmem_limit
*
* Begin End Type Length
* 0: 0 - lowmem RAM lowmem
* 1: lowmem - bff_fffff (reserved) 0xc00_00000-lowmem
* 2: 0xc00_00000 - dff_fffff PCI hole 512MB
* 3: 0xe00_00000 - fff_fffff (reserved) 512MB
* 2: 1_000_00000 - highmem RAM highmem-4G
*/
const struct e820_entry e820_default_entries[NUM_E820_ENTRIES] = {
{ /* 0 to lowmem */
.baseaddr = 0x00000000,
.length = 0x49000000,
.type = E820_TYPE_RAM
},
{ /* lowmem to lowmem_limit*/
.baseaddr = 0x49000000,
.length = 0x77000000,
.type = E820_TYPE_RESERVED
},
{ /* lowmem_limit to 4G */
.baseaddr = 0xe0000000,
.length = 0x20000000,
.type = E820_TYPE_RESERVED
},
{
.baseaddr = 0x100000000,
.length = 0x000100000,
.type = E820_TYPE_RESERVED
},
};
static int
acrn_get_bzimage_setup_size(struct vmctx *ctx)
{
uint32_t *tmp, location = 1024, setup_sectors;
int size = -1;
tmp = (uint32_t *)(ctx->baseaddr + KERNEL_LOAD_OFF(ctx)) + 1024/4;
while (*tmp != SETUP_SIG && location < 0x8000) {
tmp++;
location += 4;
}
/* setup size must be at least 1024 bytes and small than 0x8000 */
if (location < 0x8000 && location > 1024) {
setup_sectors = (location + 511) / 512;
size = setup_sectors*512;
printf("SW_LOAD: found setup sig @ 0x%08x, "
"setup_size is 0x%08x\n",
location, size);
} else
printf("SW_LOAD ERR: could not get setup "
"size in kernel %s\n",
kernel_path);
return size;
}
static int
check_image(char *path)
{
FILE *fp;
fp = fopen(path, "r");
if (fp == NULL)
return -1;
fclose(fp);
return 0;
}
int
acrn_parse_kernel(char *arg)
{
int len = strlen(arg);
if (len < STR_LEN) {
strncpy(kernel_path, arg, len);
kernel_path[len] = '\0';
assert(check_image(kernel_path) == 0);
with_kernel = 1;
printf("SW_LOAD: get kernel path %s\n", kernel_path);
return 0;
} else
return -1;
}
int
acrn_parse_ramdisk(char *arg)
{
int len = strlen(arg);
if (len < STR_LEN) {
strncpy(ramdisk_path, arg, len);
ramdisk_path[len] = '\0';
assert(check_image(ramdisk_path) == 0);
with_ramdisk = 1;
printf("SW_LOAD: get ramdisk path %s\n", ramdisk_path);
return 0;
} else
return -1;
}
int
acrn_parse_bootargs(char *arg)
{
int len = strlen(arg);
if (len < STR_LEN) {
strncpy(bootargs, arg, len);
bootargs[len] = '\0';
with_bootargs = 1;
printf("SW_LOAD: get bootargs %s\n", bootargs);
return 0;
} else
return -1;
}
static int
acrn_prepare_ramdisk(struct vmctx *ctx)
{
FILE *fp;
int len, read;
fp = fopen(ramdisk_path, "r");
if (fp == NULL) {
printf("SW_LOAD ERR: could not open ramdisk file %s\n",
ramdisk_path);
return -1;
}
fseek(fp, 0, SEEK_END);
len = ftell(fp);
if (len > (BOOTARGS_LOAD_OFF(ctx) - RAMDISK_LOAD_OFF(ctx))) {
printf("SW_LOAD ERR: the size of ramdisk file is too big"
" file len=0x%x, limit is 0x%lx\n", len,
BOOTARGS_LOAD_OFF(ctx) - RAMDISK_LOAD_OFF(ctx));
fclose(fp);
return -1;
}
ramdisk_size = len;
fseek(fp, 0, SEEK_SET);
read = fread(ctx->baseaddr + RAMDISK_LOAD_OFF(ctx),
sizeof(char), len, fp);
if (read < len) {
printf("SW_LOAD ERR: could not read the whole ramdisk file,"
" file len=%d, read %d\n", len, read);
fclose(fp);
return -1;
}
fclose(fp);
printf("SW_LOAD: ramdisk %s size %d copied to guest 0x%lx\n",
ramdisk_path, ramdisk_size, RAMDISK_LOAD_OFF(ctx));
return 0;
}
static int
acrn_prepare_kernel(struct vmctx *ctx)
{
FILE *fp;
int len, read;
fp = fopen(kernel_path, "r");
if (fp == NULL) {
printf("SW_LOAD ERR: could not open kernel file %s\n",
kernel_path);
return -1;
}
fseek(fp, 0, SEEK_END);
len = ftell(fp);
if ((len + KERNEL_LOAD_OFF(ctx)) > RAMDISK_LOAD_OFF(ctx)) {
printf("SW_LOAD ERR: need big system memory to fit image\n");
fclose(fp);
return -1;
}
kernel_size = len;
fseek(fp, 0, SEEK_SET);
read = fread(ctx->baseaddr + KERNEL_LOAD_OFF(ctx),
sizeof(char), len, fp);
if (read < len) {
printf("SW_LOAD ERR: could not read the whole kernel file,"
" file len=%d, read %d\n", len, read);
fclose(fp);
return -1;
}
fclose(fp);
printf("SW_LOAD: kernel %s size %d copied to guest 0x%lx\n",
kernel_path, kernel_size, KERNEL_LOAD_OFF(ctx));
return 0;
}
static uint32_t
acrn_create_e820_table(struct vmctx *ctx, struct e820_entry *e820)
{
uint32_t k;
memcpy(e820, e820_default_entries, sizeof(e820_default_entries));
if (ctx->lowmem > 0) {
e820[LOWRAM_E820_ENTRIES].length = ctx->lowmem;
e820[LOWRAM_E820_ENTRIES+1].baseaddr = ctx->lowmem;
e820[LOWRAM_E820_ENTRIES+1].length =
ctx->lowmem_limit - ctx->lowmem;
}
if (ctx->highmem > 0) {
e820[HIGHRAM_E820_ENTRIES].type = E820_TYPE_RAM;
e820[HIGHRAM_E820_ENTRIES].length = ctx->highmem;
}
printf("SW_LOAD: build e820 %d entries to addr: %p\n",
NUM_E820_ENTRIES, (void *)e820);
for (k = 0; k < NUM_E820_ENTRIES; k++)
printf("SW_LOAD: entry[%d]: addr 0x%016lx, size 0x%016lx, "
" type 0x%x\n",
k, e820[k].baseaddr,
e820[k].length,
e820[k].type);
return NUM_E820_ENTRIES;
}
static int
acrn_prepare_zeropage(struct vmctx *ctx, int setup_size)
{
struct _zeropage *zeropage = (struct _zeropage *)
(ctx->baseaddr + ZEROPAGE_LOAD_OFF(ctx));
struct _zeropage *kernel_load = (struct _zeropage *)
(ctx->baseaddr + KERNEL_LOAD_OFF(ctx));
/* clear the zeropage */
memset(zeropage, 0, 2*KB);
/* copy part of the header into the zero page */
memcpy(&(zeropage->hdr), &(kernel_load->hdr), sizeof(zeropage->hdr));
if (with_ramdisk) {
/*Copy ramdisk load_addr and size in zeropage header structure*/
zeropage->hdr.ramdisk_addr = (uint32_t)
((uint64_t)RAMDISK_LOAD_OFF(ctx));
zeropage->hdr.ramdisk_size = (uint32_t)ramdisk_size;
printf("SW_LOAD: build zeropage for ramdisk addr: 0x%x,"
" size: %d\n", zeropage->hdr.ramdisk_addr,
zeropage->hdr.ramdisk_size);
}
/* Copy bootargs load_addr in zeropage header structure */
zeropage->hdr.bootargs_addr = (uint32_t)
((uint64_t)BOOTARGS_LOAD_OFF(ctx));
printf("SW_LOAD: build zeropage for bootargs addr: 0x%x\n",
zeropage->hdr.bootargs_addr);
/* set constant arguments in zero page */
zeropage->hdr.loader_type = 0xff;
zeropage->hdr.load_flags |= (1<<5); /* quiet */
/* Create/add e820 table entries in zeropage */
zeropage->e820_nentries = acrn_create_e820_table(ctx, zeropage->e820);
return 0;
}
int
acrn_sw_load(struct vmctx *ctx)
{
int ret, setup_size;
uint64_t *cfg_offset = (uint64_t *)(ctx->baseaddr + GUEST_CFG_OFFSET);
*cfg_offset = ctx->lowmem;
if (with_bootargs) {
strcpy(ctx->baseaddr + BOOTARGS_LOAD_OFF(ctx), bootargs);
printf("SW_LOAD: bootargs copied to guest 0x%lx\n",
BOOTARGS_LOAD_OFF(ctx));
}
if (with_ramdisk) {
ret = acrn_prepare_ramdisk(ctx);
if (ret)
return ret;
}
if (with_kernel) {
uint64_t *kernel_entry_addr =
(uint64_t *)(ctx->baseaddr + KERNEL_ENTRY_OFF(ctx));
ret = acrn_prepare_kernel(ctx);
if (ret)
return ret;
setup_size = acrn_get_bzimage_setup_size(ctx);
if (setup_size <= 0)
return -1;
*kernel_entry_addr = (uint64_t)
(KERNEL_LOAD_OFF(ctx) + setup_size + 0x200);
ret = acrn_prepare_zeropage(ctx, setup_size);
if (ret)
return ret;
printf("SW_LOAD: zeropage prepared @ 0x%lx, "
"kernel_entry_addr=0x%lx\n",
ZEROPAGE_LOAD_OFF(ctx), *kernel_entry_addr);
}
return 0;
}