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misc: efi-stub: Implement boot image loading in container

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This patch implements the container_load_boot_image function.
This function loads boot image following multiboot protocol.

Tracked-On: #6241
Signed-off-by: Toshiki Nishioka <toshiki.nishioka@intel.com>
Signed-off-by: Yifan Liu <yifan1.liu@intel.com>
This commit is contained in:
Yifan Liu 2021-06-22 17:06:40 +08:00 committed by wenlingz
parent daa42752d2
commit e0f69399ff
1 changed files with 190 additions and 0 deletions
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190
misc/efi-stub/container.c
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@ -114,6 +114,117 @@ struct container {
LOADER_COMPRESSED_HEADER *lzh_ptr[]; /* cache of each file header in container */
};
/**
* @brief Load acrn.32.out ELF file. If the hv_ram_start and hv_ram_size are both zero,
* these two parameters will be obtained from the ELF header.
*
* @param[in] elf_image ELF image
* @param[out] hv_hpa The physical memory address the relocated hypervisor is stored
* @param[in] hv_ram_start The link address of the hv, e.g. the address used in a linker script.
* @param[in,out] hv_ram_size A pointer to the size of the hv image. If the value of *hv_ram_size and hv_ram_start is 0,
* *hv_ram_size will be updated to reflect a conservative estimate of hv_ram_size from ELF header.
* @param[in] reloc A pointer to the relocation information. Can be NULL.
*
* @return EFI_SUCCESS(0) on success, non-zero on error
*/
static EFI_STATUS load_acrn_elf(const UINT8 *elf_image, EFI_PHYSICAL_ADDRESS *hv_hpa,
UINT32 hv_ram_start, UINT32 *hv_ram_size, const RELOC_INFO *reloc)
{
EFI_STATUS err = EFI_SUCCESS;
if (validate_elf_header((Elf32_Ehdr *)elf_image) < 0) {
err = EFI_LOAD_ERROR;
goto out;
}
if (hv_ram_start == 0 && *hv_ram_size == 0) {
UINT64 ram_low, ram_high;
if (elf_calc_link_addr_range((Elf32_Ehdr *)elf_image, &ram_low, &ram_high) < 0) {
err = EFI_LOAD_ERROR;
goto out;
}
hv_ram_start = ram_low;
*hv_ram_size = ram_high - ram_low;
/* According to board_defconfig.py, the size required might include:
* hv_base_ram + post_launched_ram * postlaunched_num + ivshmem (if enabled).
* i.e., 20MB + 16MB * postlaunched_num + 2 * max(total_ivshmem, 0x200000)
*
* From bootloader we can only do conservative estimate. I.e., we will calculate
* using maximum possible number of postlaunched number and total_ivshmem.
*/
/* 16MB * postlaunched_num */
*hv_ram_size += (16 * 1024 * 1024) * 7;
/* total size of ivshmem will be at least 2 * 200000. Here we double the region. */
*hv_ram_size += 4 * 0x200000;
/* Typically this can use memory up to 0xAA00000, compared to the size calculated
* for a typical hybrid_rt: 0x3800000.
*
* It might seemed a little bit wasteful but that's the best we can do without
* an address tag in multiboot header.
*/
}
if (reloc) {
err = emalloc_reserved_aligned(hv_hpa, *hv_ram_size, reloc->align,
reloc->min_addr, reloc->max_addr);
}
else {
err = emalloc_fixed_addr(hv_hpa, *hv_ram_size, hv_ram_start);
}
if (err != EFI_SUCCESS) {
Print(L"Failed to allocate memory for ACRN HV %r\n", err);
goto out;
}
if (elf_load((Elf32_Ehdr *)elf_image, *hv_hpa, hv_ram_start) < 0) {
err = EFI_LOAD_ERROR;
goto out;
}
out:
return err;
}
static int parse_boot_image(const UINT8 *data, EFI_PHYSICAL_ADDRESS *hv_entry,
UINT8 *mb_version, LADDR_INFO **laddr, RELOC_INFO **reloc, const void **mb_header)
{
const void *mb_hdr;
UINT8 mbver = 0;
mb_hdr = find_mb2header(data, MULTIBOOT2_SEARCH);
if (mb_hdr) {
struct hv_mb2header_tag_list hv_tags;
mbver = 2;
if (parse_mb2header(mb_hdr, &hv_tags) < 0) {
Print(L"Illegal multiboot2 header tags\n");
return -1;
}
if (hv_tags.addr) *laddr = hv_tags.addr;
if (hv_tags.entry) *hv_entry = hv_tags.entry->entry_addr;
if (hv_tags.reloc) *reloc = hv_tags.reloc;
} else {
mb_hdr = (struct multiboot_header *)find_mb1header(data, MULTIBOOT_SEARCH);
if (!mb_hdr) {
Print(L"Image is not multiboot compatible\n");
return -1;
}
mbver = 1;
}
*mb_version = mbver;
*mb_header = mb_hdr;
return 0;
}
/**
* @brief Load hypervisor into memory from a container blob
*
@ -123,7 +234,86 @@ struct container {
*/
static EFI_STATUS container_load_boot_image(HV_LOADER hvld)
{
int i;
EFI_STATUS err = EFI_SUCCESS;
struct container *ctr = (struct container *)hvld;
const void *mb_hdr;
LOADER_COMPRESSED_HEADER *lzh = NULL;
/* prepare boot command line: stitched from hv_cmdline.txt and argument from efibootmgr -u */
lzh = ctr->lzh_ptr[LZH_BOOT_CMD];
ctr->boot_cmdsize = lzh->Size + StrnLen(ctr->options, ctr->options_size);
if (ctr->boot_cmdsize >= MAX_BOOTCMD_SIZE) {
Print(L"Boot command size 0x%x exceeding limit 0x%x\n", ctr->boot_cmdsize, MAX_BOOTCMD_SIZE);
return EFI_INVALID_PARAMETER;
}
memcpy(ctr->boot_cmd, (const char *)lzh->Data, lzh->Size - 1);
if (ctr->options) {
ctr->boot_cmd[lzh->Size - 1] = ' ';
for (i = lzh->Size; i < ctr->boot_cmdsize; i++) {
ctr->boot_cmd[i] = ctr->options[i - lzh->Size];
}
}
/* parse and load boot image */
lzh = ctr->lzh_ptr[LZH_BOOT_IMG];
if (parse_boot_image((const UINT8 *)lzh->Data, &ctr->hv_entry, &ctr->mb_version,
&ctr->laddr, &ctr->reloc, &mb_hdr) < 0) {
err = EFI_INVALID_PARAMETER;
goto out;
}
if (ctr->mb_version == 2) {
/* Multiboot 2 */
if (!ctr->laddr) {
/* GRUB will fail if the elf image contains ".rela" section. We simply ignore it. */
UINT32 hv_ram_size = 0;
err = load_acrn_elf(lzh->Data, &ctr->hv_hpa, 0, &hv_ram_size, ctr->reloc);
ctr->est_hv_ram_size = hv_ram_size;
ctr->hv_entry = elf_get_entry((Elf32_Ehdr *)lzh->Data);
} else {
/*
* Multiboot2 specs address tag contains only one pair of load address and end address, which implies that
* the text and data segments in image must be consecutive. This is true for the a.out binary format
* but not the ELF format.
*
* We can either implement a "load_acrn_binary" to substitute load_acrn_elf here and tell people
* to use a flat binary (acrn.bin), or left it untouched and tell people to use an ELF (which is
* what we're doing now).
*/
UINT32 load_addr = ctr->laddr->load_addr;
UINT32 load_size = ctr->laddr->load_end_addr - ctr->laddr->load_addr;
err = load_acrn_elf(lzh->Data, &ctr->hv_hpa, load_addr, &load_size, ctr->reloc);
}
if (err != EFI_SUCCESS) {
Print(L"Failed to load ACRN HV ELF Image%r\n", err);
goto out;
}
/* Fix up entry address */
if (ctr->reloc) {
ctr->hv_entry += (ctr->hv_hpa >= ctr->laddr->load_addr) ?
ctr->hv_hpa - ctr->laddr->load_addr :
ctr->laddr->load_addr - ctr->hv_hpa;
}
} else {
/* Multiboot 1. We don't do relocation for MB1 case. The ".rela" section will be ignored. */
/* TODO: add support for the case when AOUT_KLUDGE flag is set */
UINT32 hv_ram_size = 0;
err = load_acrn_elf(lzh->Data, &ctr->hv_hpa, 0, &hv_ram_size, NULL);
if (err != EFI_SUCCESS) {
Print(L"Failed to load ACRN HV ELF Image%r\n", err);
goto out;
}
ctr->est_hv_ram_size = hv_ram_size;
ctr->hv_entry = elf_get_entry((Elf32_Ehdr *)lzh->Data);
}
out:
return err;
}