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acrn-hypervisor/efi-stub/boot.c

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/*
* Copyright (c) 2011, 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:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products
* derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 THE
* COPYRIGHT OWNER 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 <efi.h>
#include <efilib.h>
#include "efilinux.h"
#include "stdlib.h"
#include "boot.h"
#include "acrn_common.h"
#include "vm0_boot.h"
EFI_SYSTEM_TABLE *sys_table;
EFI_BOOT_SERVICES *boot;
char *cmdline = NULL;
extern const uint64_t guest_entry;
static UINT64 hv_hpa;
static inline void hv_jump(EFI_PHYSICAL_ADDRESS hv_start,
struct multiboot_info *mbi, struct efi_context *efi_ctx)
{
hv_func hf;
efi_ctx->vcpu_regs.rip = (uint64_t)&guest_entry;
/* The 64-bit entry of acrn hypervisor is 0x200 from the start
* address of hv image. But due to there is multiboot header,
* so it has to be added with 0x10.
*
* FIXME: The hardcode value 0x210 should be worked out
* from the link address of cpu_primary_start_64 in acrn.out
*/
hf = (hv_func)(hv_start + 0x210);
asm volatile ("cli");
/* jump to acrn hypervisor */
hf(MULTIBOOT_INFO_MAGIC, mbi);
}
EFI_STATUS construct_mbi(EFI_PHYSICAL_ADDRESS hv_hpa)
{
UINTN map_size, map_key;
UINT32 desc_version;
UINTN desc_size;
EFI_MEMORY_DESCRIPTOR *map_buf;
EFI_STATUS err = EFI_SUCCESS;
struct multiboot_info *mbi;
struct multiboot_mmap *mmap;
struct efi_context *efi_ctx;
int32_t i, j;
mbi = MBOOT_INFO_PTR(hv_hpa);
mmap = MBOOT_MMAP_PTR(hv_hpa);
efi_ctx = BOOT_CTX_PTR(hv_hpa);
(void)memset((void *)mbi, 0x0, MBOOT_INFO_SIZE);
(void)memset((void *)mmap, 0x0, MBOOT_MMAP_SIZE);
/* We're just interested in the map's size for now */
map_size = 0;
err = get_memory_map(&map_size, NULL, NULL, NULL, NULL);
if (err != EFI_SUCCESS && err != EFI_BUFFER_TOO_SMALL)
goto out;
again:
err = allocate_pool(EfiLoaderData, map_size, (void **) &map_buf);
if (err != EFI_SUCCESS)
goto out;
/*
* Remember! We've already allocated map_buf with emalloc (and
* 'map_size' contains its size) which means that it should be
* positioned below our allocation for the kernel. Use that
* space for the memory map.
*/
err = get_memory_map(&map_size, map_buf, &map_key,
&desc_size, &desc_version);
if (err != EFI_SUCCESS) {
if (err == EFI_BUFFER_TOO_SMALL) {
/*
* Argh! The buffer that we allocated further
* up wasn't large enough which means we need
* to allocate them again, but this time
* larger. 'map_size' has been updated by the
* call to memory_map().
*/
free_pool(map_buf);
goto again;
}
goto out;
}
/*
* Convert the EFI memory map to E820.
*/
for (i = 0, j = 0; i < map_size / desc_size; i++) {
EFI_MEMORY_DESCRIPTOR *d;
uint32_t e820_type = 0;
d = (EFI_MEMORY_DESCRIPTOR *)((uint64_t)map_buf + (i * desc_size));
switch(d->Type) {
case EfiReservedMemoryType:
case EfiRuntimeServicesCode:
case EfiRuntimeServicesData:
case EfiMemoryMappedIO:
case EfiMemoryMappedIOPortSpace:
case EfiPalCode:
e820_type = E820_RESERVED;
break;
case EfiUnusableMemory:
e820_type = E820_UNUSABLE;
break;
case EfiACPIReclaimMemory:
e820_type = E820_ACPI;
break;
case EfiLoaderCode:
case EfiLoaderData:
case EfiBootServicesCode:
case EfiBootServicesData:
case EfiConventionalMemory:
e820_type = E820_RAM;
break;
case EfiACPIMemoryNVS:
e820_type = E820_NVS;
break;
default:
continue;
}
if ((j != 0) && mmap[j-1].mm_type == e820_type &&
(mmap[j-1].mm_base_addr + mmap[j-1].mm_length)
== d->PhysicalStart) {
mmap[j-1].mm_length += d->NumberOfPages << EFI_PAGE_SHIFT;
} else {
mmap[j].mm_base_addr = d->PhysicalStart;
mmap[j].mm_length = d->NumberOfPages << EFI_PAGE_SHIFT;
mmap[j].mm_type = e820_type;
j++;
}
}
/* switch hv memory region(0x20000000 ~ 0x22000000) to
* available RAM in e820 table
*/
mmap[j].mm_base_addr = hv_hpa;
mmap[j].mm_length = HV_RUNTIME_MEM_SIZE;
mmap[j].mm_type = E820_RAM;
j++;
mbi->mi_flags |= MULTIBOOT_INFO_HAS_MMAP | MULTIBOOT_INFO_HAS_CMDLINE;
mbi->mi_mmap_length = j*sizeof(struct multiboot_mmap);
mbi->mi_cmdline = (UINTN)cmdline;
mbi->mi_mmap_addr = (UINTN)mmap;
mbi->mi_flags |= MULTIBOOT_INFO_HAS_DRIVES;
mbi->mi_drives_addr = (UINT32)(UINTN)efi_ctx;
out:
return err;
}
static EFI_STATUS
switch_to_guest_mode(EFI_HANDLE image, EFI_PHYSICAL_ADDRESS hv_hpa)
{
EFI_PHYSICAL_ADDRESS addr;
EFI_STATUS err;
struct multiboot_info *mbi;
struct efi_context *efi_ctx;
struct acpi_table_rsdp *rsdp = NULL;
int32_t i;
EFI_CONFIGURATION_TABLE *config_table;
mbi = MBOOT_INFO_PTR(hv_hpa);
efi_ctx = BOOT_CTX_PTR(hv_hpa);
(void)memset((void *)efi_ctx, 0x0, BOOT_CTX_SIZE);
/* reserve secondary memory region for CPU trampoline code */
err = emalloc_reserved_mem(&addr, CONFIG_LOW_RAM_SIZE, MEM_ADDR_1MB);
if (err != EFI_SUCCESS)
goto out;
if (addr < 4096)
Print(L"Warning: CPU trampoline code buf occupied zero-page\n");
efi_ctx->ap_trampoline_buf = (void *)addr;
config_table = sys_table->ConfigurationTable;
for (i = 0; i < sys_table->NumberOfTableEntries; i++) {
EFI_GUID acpi_20_table_guid = ACPI_20_TABLE_GUID;
EFI_GUID acpi_table_guid = ACPI_TABLE_GUID;
if (CompareGuid(&acpi_20_table_guid,
&config_table->VendorGuid) == 0) {
rsdp = config_table->VendorTable;
break;
}
if (CompareGuid(&acpi_table_guid,
&config_table->VendorGuid) == 0)
rsdp = config_table->VendorTable;
config_table++;
}
if (rsdp == NULL) {
Print(L"unable to find RSDP\n");
goto out;
}
efi_ctx->rsdp = rsdp;
/* construct multiboot info and deliver it to hypervisor */
err = construct_mbi(hv_hpa);
if (err != EFI_SUCCESS)
goto out;
asm volatile ("pushf\n\t"
"pop %0\n\t"
: "=r"(efi_ctx->vcpu_regs.rflags)
: );
asm volatile ("movq %%rax, %0" : "=r"(efi_ctx->vcpu_regs.gprs.rax));
asm volatile ("movq %%rbx, %0" : "=r"(efi_ctx->vcpu_regs.gprs.rbx));
asm volatile ("movq %%rcx, %0" : "=r"(efi_ctx->vcpu_regs.gprs.rcx));
asm volatile ("movq %%rdx, %0" : "=r"(efi_ctx->vcpu_regs.gprs.rdx));
asm volatile ("movq %%rdi, %0" : "=r"(efi_ctx->vcpu_regs.gprs.rdi));
asm volatile ("movq %%rsi, %0" : "=r"(efi_ctx->vcpu_regs.gprs.rsi));
asm volatile ("movq %%rsp, %0" : "=r"(efi_ctx->vcpu_regs.gprs.rsp));
asm volatile ("movq %%rbp, %0" : "=r"(efi_ctx->vcpu_regs.gprs.rbp));
asm volatile ("movq %%r8, %0" : "=r"(efi_ctx->vcpu_regs.gprs.r8));
asm volatile ("movq %%r9, %0" : "=r"(efi_ctx->vcpu_regs.gprs.r9));
asm volatile ("movq %%r10, %0" : "=r"(efi_ctx->vcpu_regs.gprs.r10));
asm volatile ("movq %%r11, %0" : "=r"(efi_ctx->vcpu_regs.gprs.r11));
asm volatile ("movq %%r12, %0" : "=r"(efi_ctx->vcpu_regs.gprs.r12));
asm volatile ("movq %%r13, %0" : "=r"(efi_ctx->vcpu_regs.gprs.r13));
asm volatile ("movq %%r14, %0" : "=r"(efi_ctx->vcpu_regs.gprs.r14));
asm volatile ("movq %%r15, %0" : "=r"(efi_ctx->vcpu_regs.gprs.r15));
hv_jump(hv_hpa, mbi, efi_ctx);
asm volatile (".global guest_entry\n\t"
"guest_entry:\n\t");
out:
return err;
}
static inline EFI_STATUS isspace(CHAR8 ch)
{
return ((uint8_t)ch <= ' ');
}
/**
* efi_main - The entry point for the OS loader image.
* @image: firmware-allocated handle that identifies the image
* @sys_table: EFI system table
*/
EFI_STATUS
efi_main(EFI_HANDLE image, EFI_SYSTEM_TABLE *_table)
{
WCHAR *error_buf;
EFI_STATUS err;
EFI_LOADED_IMAGE *info;
UINTN sec_addr;
UINTN sec_size;
char *section;
EFI_DEVICE_PATH *path;
INTN i, index;
CHAR16 *bootloader_name = NULL;
CHAR16 bootloader_param[] = L"bootloader=";
EFI_HANDLE bootloader_image;
CHAR16 *options = NULL;
UINT32 options_size = 0;
CHAR16 *cmdline16, *n;
InitializeLib(image, _table);
sys_table = _table;
boot = sys_table->BootServices;
if (CheckCrc(sys_table->Hdr.HeaderSize, &sys_table->Hdr) != TRUE)
return EFI_LOAD_ERROR;
err = handle_protocol(image, &LoadedImageProtocol, (void **)&info);
if (err != EFI_SUCCESS)
goto failed;
/* get the options */
options = info->LoadOptions;
options_size = info->LoadOptionsSize;
/* convert the options to cmdline */
if (options_size > 0)
cmdline = ch16_2_ch8(options);
/* First check if we were given a bootloader name
* E.g.: "bootloader=\EFI\org.clearlinux\bootloaderx64.efi"
*/
cmdline16 = StrDuplicate(options);
bootloader_name = strstr_16(cmdline16, bootloader_param);
if (bootloader_name) {
bootloader_name = bootloader_name + StrLen(bootloader_param);
n = bootloader_name;
i = 0;
while (*n && !isspace((CHAR8)*n) && (*n < 0xff)) {
n++; i++;
}
*n++ = '\0';
} else {
/*
* If we reach this point, it means we did not receive a specific
* bootloader name to be used. Fall back to the default bootloader
* as specified in config.h
*/
bootloader_name = ch8_2_ch16(CONFIG_UEFI_OS_LOADER_NAME);
}
section = ".hv";
err = get_pe_section(info->ImageBase, section, &sec_addr, &sec_size);
if (EFI_ERROR(err)) {
Print(L"Unable to locate section of ACRNHV %r ", err);
goto failed;
}
/* without relocateion enabled, hypervisor binary need to reside in
* fixed memory address starting from CONFIG_HV_RAM_START, make a call
* to emalloc_fixed_addr for that case. With CONFIG_RELOC enabled,
* hypervisor is able to do relocation, the only requirement is that
* it need to reside in memory below 4GB, call emalloc_reserved_mem()
* instead.
*/
#ifdef CONFIG_RELOC
err = emalloc_reserved_mem(&hv_hpa, HV_RUNTIME_MEM_SIZE, MEM_ADDR_4GB);
#else
err = emalloc_fixed_addr(&hv_hpa, HV_RUNTIME_MEM_SIZE, CONFIG_HV_RAM_START);
#endif
if (err != EFI_SUCCESS)
goto failed;
memcpy((char *)hv_hpa, info->ImageBase + sec_addr, sec_size);
/* load hypervisor and begin to run on it */
err = switch_to_guest_mode(image, hv_hpa);
if (err != EFI_SUCCESS)
goto failed;
/* load and start the default bootloader */
path = FileDevicePath(info->DeviceHandle, bootloader_name);
if (!path)
goto free_args;
FreePool(bootloader_name);
err = uefi_call_wrapper(boot->LoadImage, 6, FALSE, image,
path, NULL, 0, &bootloader_image);
if (EFI_ERROR(err)) {
uefi_call_wrapper(boot->Stall, 1, 3 * 1000 * 1000);
goto failed;
}
err = uefi_call_wrapper(boot->StartImage, 3, bootloader_image,
NULL, NULL);
if (EFI_ERROR(err)) {
uefi_call_wrapper(boot->Stall, 1, 3 * 1000 * 1000);
goto failed;
}
uefi_call_wrapper(boot->UnloadImage, 1, bootloader_image);
return EFI_SUCCESS;
free_args:
FreePool(bootloader_name);
failed:
/*
* We need to be careful not to trash 'err' here. If we fail
* to allocate enough memory to hold the error string fallback
* to returning 'err'.
*/
if (allocate_pool(EfiLoaderData, ERROR_STRING_LENGTH,
(void **)&error_buf) != EFI_SUCCESS) {
Print(L"Couldn't allocate pages for error string\n");
return err;
}
StatusToString(error_buf, err);
Print(L": %s\n", error_buf);
/* If we don't wait for user input, (s)he will not see the error message */
uefi_call_wrapper(sys_table->ConOut->OutputString, 2, sys_table->ConOut, \
L"\r\n\r\n\r\nHit any key to exit\r\n");
uefi_call_wrapper(sys_table->BootServices->WaitForEvent, 3, 1, \
&sys_table->ConIn->WaitForKey, &index);
return exit(image, err, ERROR_STRING_LENGTH, error_buf);
}
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