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acrn-hypervisor/devicemodel/core/sw_load_common.c

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/*-
* Copyright (c) 2017-2022 Intel Corporation.
*
* 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 <stdbool.h>
#include "vmmapi.h"
#include "sw_load.h"
#include "dm.h"
#include "pci_core.h"
#include "vssram.h"
int with_bootargs;
static char bootargs[BOOT_ARG_LEN];
/*
* 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 Limit Type Length
* 0: 0 - 0xA0000 RAM 0xA0000
* 1: 0x100000 - lowmem part1 RAM 0x0
* 2: SW SRAM_bot - SW SRAM_top (reserved) VSSRAM_MAX_SIZE
* 3: gpu_rsvd_bot - gpu_rsvd_top (reserved) 0x4004000
* 4: lowmem part2 - 0x80000000 (reserved) 0x0
* 5: 0xE0000000 - 0x100000000 MCFG, MMIO 512MB
* 6: HIGHRAM_START_ADDR - mmio64 start RAM ctx->highmem
*
* FIXME: Do we need to reserve DSM and OPREGION for GVTD here.
*/
const struct e820_entry e820_default_entries[NUM_E820_ENTRIES] = {
{ /* 0 to video memory */
.baseaddr = 0x00000000,
.length = 0xA0000,
.type = E820_TYPE_RAM
},
{ /* 1MB to lowmem part1 */
.baseaddr = 1 * MB,
.length = 0x0,
.type = E820_TYPE_RAM
},
/*
* VSSRAM area: size: 0x800000
* In native, the VSSRAM region should be part of DRAM memory.
* But one fixed VSSRAM gpa is friendly for virtualization due
* to decoupled with various guest memory size.
*/
{
.baseaddr = 0x0,
.length = 0x0,
.type = E820_TYPE_RESERVED
},
{ /* GPU DSM & OpRegion reserved region */
.baseaddr = 0x0,
.length = 0x0,
.type = E820_TYPE_RESERVED
},
{ /* lowmem part2 to lowmem_limit */
.baseaddr = 0x0,
.length = 0x0,
.type = E820_TYPE_RESERVED
},
{ /* ECFG_BASE to 4GB */
.baseaddr = PCI_EMUL_ECFG_BASE,
.length = (4 * GB) - PCI_EMUL_ECFG_BASE,
.type = E820_TYPE_RESERVED
},
{ /* 5GB to highmem */
.baseaddr = HIGHRAM_START_ADDR,
.length = 0x0,
.type = E820_TYPE_RESERVED
},
};
int
acrn_parse_bootargs(char *arg)
{
size_t len = strnlen(arg, BOOT_ARG_LEN);
if (len < BOOT_ARG_LEN) {
strncpy(bootargs, arg, len + 1);
with_bootargs = 1;
pr_notice("SW_LOAD: get bootargs %s\n", bootargs);
return 0;
}
return -1;
}
char*
get_bootargs(void)
{
return bootargs;
}
int
check_image(char *path, size_t size_limit, size_t *size)
{
FILE *fp;
long len;
fp = fopen(path, "r");
if (fp == NULL) {
pr_err("SW_LOAD ERR: image file failed to open\n");
return -1;
}
fseek(fp, 0, SEEK_END);
len = ftell(fp);
if (len == 0 || (size_limit && len > size_limit)) {
pr_err("SW_LOAD ERR: file is %s\n",
len ? "too large" : "empty");
fclose(fp);
return -1;
}
fclose(fp);
*size = len;
return 0;
}
/* Assumption:
* the range [start, start + size] belongs to one entry of e820 table
*/
int
add_e820_entry(struct e820_entry *e820, int len, uint64_t start,
uint64_t size, uint32_t type)
{
int i, length = len;
uint64_t e_s, e_e;
for (i = 0; i < len; i++) {
e_s = e820[i].baseaddr;
e_e = e820[i].baseaddr + e820[i].length;
if ((e_s <= start) && ((start + size) <= e_e)) {
int index_s = 0, index_e = 3;
uint64_t pt[4];
uint32_t pt_t[3];
pt[0] = e_s;
pt[1] = start;
pt[2] = start + size;
pt[3] = e_e;
pt_t[0] = e820[i].type;
pt_t[1] = type;
pt_t[2] = e820[i].type;
if (e_s == start) {
index_s = 1;
}
if (e_e == (start + size)) {
index_e = 2;
}
length += index_e - index_s - 1;
if ((i != (len - 1) && ((index_e - index_s) > 1))) {
memmove(&e820[i + index_e - index_s],
&e820[i + 1], (len - i - 1) *
sizeof(struct e820_entry));
}
for (; index_s < index_e; index_s++, i++) {
e820[i].baseaddr = pt[index_s];
e820[i].length = pt[index_s + 1] - pt[index_s];
e820[i].type = pt_t[index_s];
}
break;
}
}
return length;
}
uint32_t
acrn_create_e820_table(struct vmctx *ctx, struct e820_entry *e820)
{
uint32_t removed = 0, k;
uint32_t gpu_rsvmem_base_gpa = 0;
uint64_t vssram_gpa = 0;
memcpy(e820, e820_default_entries, sizeof(e820_default_entries));
/* FIXME: Here wastes 8MB memory if VSSRAM is enabled, and 64MB+16KB if
* GPU reserved memory is exist.
*
* Determines the GPU region due to DSM identical mapping.
*/
gpu_rsvmem_base_gpa = get_gpu_rsvmem_base_gpa();
if (gpu_rsvmem_base_gpa) {
e820[LOWRAM_E820_ENTRY + 2].baseaddr = gpu_rsvmem_base_gpa;
e820[LOWRAM_E820_ENTRY + 2].length = get_gpu_rsvmem_size();
} else {
e820[LOWRAM_E820_ENTRY + 2].baseaddr = ctx->lowmem_limit;
}
/* Always put VSSRAM before GPU region and keep 1MB boundary for protection. */
vssram_gpa = get_vssram_gpa_base();
if (vssram_gpa) {
e820[LOWRAM_E820_ENTRY + 1].baseaddr = vssram_gpa;
e820[LOWRAM_E820_ENTRY + 1].length = get_vssram_size();
} else {
e820[LOWRAM_E820_ENTRY + 1].baseaddr = e820[LOWRAM_E820_ENTRY + 2].baseaddr;
}
if (ctx->lowmem <= e820[LOWRAM_E820_ENTRY + 1].baseaddr) {
/* Caculation for lowmem part1 */
e820[LOWRAM_E820_ENTRY].length =
ctx->lowmem - e820[LOWRAM_E820_ENTRY].baseaddr;
} else {
/* Caculation for lowmem part1 */
e820[LOWRAM_E820_ENTRY].length =
e820[LOWRAM_E820_ENTRY + 1].baseaddr - e820[LOWRAM_E820_ENTRY].baseaddr;
/* Caculation for lowmem part2 */
e820[LOWRAM_E820_ENTRY + 3].baseaddr =
e820[LOWRAM_E820_ENTRY + 2].baseaddr + e820[LOWRAM_E820_ENTRY + 2].length;
if (ctx->lowmem > e820[LOWRAM_E820_ENTRY + 3].baseaddr) {
e820[LOWRAM_E820_ENTRY + 3].length =
ctx->lowmem - e820[LOWRAM_E820_ENTRY + 3].baseaddr;
e820[LOWRAM_E820_ENTRY + 3].type = E820_TYPE_RAM;
}
}
/* Caculation for highmem */
if (ctx->highmem > 0) {
e820[HIGHRAM_E820_ENTRY].type = E820_TYPE_RAM;
e820[HIGHRAM_E820_ENTRY].length = ctx->highmem;
}
/* Remove empty entries in e820 table */
for (k = 0; k < (NUM_E820_ENTRIES - 1 - removed); k++) {
if (e820[k].length == 0x0) {
memmove(&e820[k], &e820[k + 1], sizeof(struct e820_entry) *
(NUM_E820_ENTRIES - (k + 1)));
k--;
removed++;
}
}
pr_info("SW_LOAD: build e820 %d entries to addr: %p\r\n",
NUM_E820_ENTRIES - removed, (void *)e820);
for (k = 0; k < NUM_E820_ENTRIES - removed; k++)
pr_info("SW_LOAD: entry[%d]: addr 0x%016lx, size 0x%016lx, "
" type 0x%x\r\n",
k, e820[k].baseaddr,
e820[k].length,
e820[k].type);
return (NUM_E820_ENTRIES - removed);
}
int
acrn_sw_load(struct vmctx *ctx)
{
if (vsbl_file_name)
return acrn_sw_load_vsbl(ctx);
else if ((ovmf_file_name != NULL) ^ (ovmf_code_file_name && ovmf_vars_file_name))
return acrn_sw_load_ovmf(ctx);
else if (kernel_file_name)
return acrn_sw_load_bzimage(ctx);
else if (elf_file_name)
return acrn_sw_load_elf(ctx);
else
return -1;
}
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