2 * GRUB -- GRand Unified Bootloader
3 * Copyright (C) 2014 Free Software Foundation, Inc.
5 * GRUB is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
10 * GRUB is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
19 #include <grub/cache.h>
20 #include <grub/charset.h>
21 #include <grub/command.h>
23 #include <grub/file.h>
25 #include <grub/list.h>
26 #include <grub/loader.h>
27 #include <grub/misc.h>
29 #include <grub/types.h>
30 #include <grub/cpu/fdtload.h>
31 #include <grub/cpu/linux.h>
32 #include <grub/efi/efi.h>
33 #include <grub/efi/pe32.h> /* required by struct xen_hypervisor_header */
34 #include <grub/i18n.h>
35 #include <grub/lib/cmdline.h>
37 GRUB_MOD_LICENSE ("GPLv3+");
39 #define XEN_HYPERVISOR_NAME "xen_hypervisor"
40 #define MODULE_CUSTOM_COMPATIBLE "multiboot,module"
42 /* This maximum size is defined in Power.org ePAPR V1.1
43 * https://www.power.org/documentation/epapr-version-1-1/
44 * 2.2.1.1 Node Name Requirements
45 * node-name@unit-address
46 * 31 + 1(@) + 16(64bit address in hex format) + 1(\0) = 49
48 #define FDT_NODE_NAME_MAX_SIZE (49)
50 struct compat_string_struct
53 const char *compat_string;
55 typedef struct compat_string_struct compat_string_struct_t;
56 #define FDT_COMPATIBLE(x) {.size = sizeof(x), .compat_string = (x)}
65 typedef enum module_type module_type_t;
67 struct xen_hypervisor_header
69 struct grub_arm64_linux_kernel_header efi_head;
71 /* This is always PE\0\0. */
72 grub_uint8_t signature[GRUB_PE32_SIGNATURE_SIZE];
73 /* The COFF file header. */
74 struct grub_pe32_coff_header coff_header;
75 /* The Optional header. */
76 struct grub_pe64_optional_header optional_header;
79 struct xen_boot_binary
81 struct xen_boot_binary *next;
82 struct xen_boot_binary **prev;
93 static grub_dl_t my_mod;
97 static struct xen_boot_binary *xen_hypervisor;
98 static struct xen_boot_binary *module_head;
100 static __inline grub_addr_t
101 xen_boot_address_align (grub_addr_t start, grub_size_t align)
103 return (align ? (ALIGN_UP (start, align)) : start);
107 prepare_xen_hypervisor_params (void *xen_boot_fdt)
112 chosen_node = grub_fdt_find_subnode (xen_boot_fdt, 0, "chosen");
114 chosen_node = grub_fdt_add_subnode (xen_boot_fdt, 0, "chosen");
116 return grub_error (GRUB_ERR_IO, "failed to get chosen node in FDT");
118 grub_dprintf ("xen_loader",
119 "Xen Hypervisor cmdline : %s @ %p size:%d\n",
120 xen_hypervisor->cmdline, xen_hypervisor->cmdline,
121 xen_hypervisor->cmdline_size);
123 retval = grub_fdt_set_prop (xen_boot_fdt, chosen_node, "bootargs",
124 xen_hypervisor->cmdline,
125 xen_hypervisor->cmdline_size);
127 return grub_error (GRUB_ERR_IO, "failed to install/update FDT");
129 return GRUB_ERR_NONE;
133 prepare_xen_module_params (struct xen_boot_binary *module, void *xen_boot_fdt)
135 int retval, chosen_node = 0, module_node = 0;
136 char module_name[FDT_NODE_NAME_MAX_SIZE];
138 retval = grub_snprintf (module_name, FDT_NODE_NAME_MAX_SIZE, "module@%lx",
139 xen_boot_address_align (module->start,
141 grub_dprintf ("xen_loader", "Module node name %s \n", module_name);
143 if (retval < (int) sizeof ("module@"))
144 return grub_error (GRUB_ERR_IO, N_("failed to get FDT"));
146 chosen_node = grub_fdt_find_subnode (xen_boot_fdt, 0, "chosen");
148 chosen_node = grub_fdt_add_subnode (xen_boot_fdt, 0, "chosen");
150 return grub_error (GRUB_ERR_IO, "failed to get chosen node in FDT");
153 grub_fdt_find_subnode (xen_boot_fdt, chosen_node, module_name);
156 grub_fdt_add_subnode (xen_boot_fdt, chosen_node, module_name);
158 retval = grub_fdt_set_prop (xen_boot_fdt, module_node, "compatible",
159 MODULE_CUSTOM_COMPATIBLE, sizeof(MODULE_CUSTOM_COMPATIBLE) - 1);
161 return grub_error (GRUB_ERR_IO, "failed to update FDT");
163 grub_dprintf ("xen_loader", "Module\n");
165 retval = grub_fdt_set_reg64 (xen_boot_fdt, module_node,
166 xen_boot_address_align (module->start,
170 return grub_error (GRUB_ERR_IO, "failed to update FDT");
172 if (module->cmdline && module->cmdline_size > 0)
174 grub_dprintf ("xen_loader",
175 "Module cmdline : %s @ %p size:%d\n",
176 module->cmdline, module->cmdline, module->cmdline_size);
178 retval = grub_fdt_set_prop (xen_boot_fdt, module_node, "bootargs",
179 module->cmdline, module->cmdline_size + 1);
181 return grub_error (GRUB_ERR_IO, "failed to update FDT");
185 grub_dprintf ("xen_loader", "Module has no bootargs!\n");
188 return GRUB_ERR_NONE;
192 finalize_params_xen_boot (void)
194 struct xen_boot_binary *module;
196 grub_size_t additional_size = 0x1000;
199 additional_size += FDT_NODE_NAME_MAX_SIZE + xen_hypervisor->cmdline_size;
200 FOR_LIST_ELEMENTS (module, module_head)
202 additional_size += 6 * FDT_NODE_NAME_MAX_SIZE + sizeof(MODULE_CUSTOM_COMPATIBLE) - 1
203 + module->cmdline_size;
206 xen_boot_fdt = grub_fdt_load (additional_size);
208 return grub_error (GRUB_ERR_IO, "failed to get FDT");
212 if (prepare_xen_hypervisor_params (xen_boot_fdt) != GRUB_ERR_NONE)
217 grub_dprintf ("xen_loader", "Failed to get Xen Hypervisor info!\n");
221 /* Set module params info */
222 FOR_LIST_ELEMENTS (module, module_head)
224 if (module->start && module->size > 0)
226 grub_dprintf ("xen_loader", "Module @ 0x%lx size:0x%lx\n",
227 xen_boot_address_align (module->start, module->align),
229 if (prepare_xen_module_params (module, xen_boot_fdt) != GRUB_ERR_NONE)
234 grub_dprintf ("xen_loader", "Module info error!\n");
239 if (grub_fdt_install() == GRUB_ERR_NONE)
240 return GRUB_ERR_NONE;
245 return grub_error (GRUB_ERR_IO, "failed to install/update FDT");
252 grub_err_t err = finalize_params_xen_boot ();
256 return grub_arm64_uefi_boot_image (xen_hypervisor->start,
257 xen_hypervisor->size,
258 xen_hypervisor->cmdline);
262 single_binary_unload (struct xen_boot_binary *binary)
267 if (binary->start && binary->size > 0)
269 grub_efi_free_pages ((grub_efi_physical_address_t) binary->start,
270 GRUB_EFI_BYTES_TO_PAGES (binary->size + binary->align));
273 if (binary->cmdline && binary->cmdline_size > 0)
275 grub_free (binary->cmdline);
276 grub_dprintf ("xen_loader",
277 "Module cmdline memory free @ %p size: %d\n",
278 binary->cmdline, binary->cmdline_size);
281 if (!binary->is_hypervisor)
282 grub_list_remove (GRUB_AS_LIST (binary));
284 grub_dprintf ("xen_loader",
285 "Module struct memory free @ %p size: 0x%lx\n",
286 binary, sizeof (binary));
293 all_binaries_unload (void)
295 struct xen_boot_binary *binary;
297 FOR_LIST_ELEMENTS (binary, module_head)
299 single_binary_unload (binary);
303 single_binary_unload (xen_hypervisor);
312 all_binaries_unload ();
314 grub_dl_unref (my_mod);
316 return GRUB_ERR_NONE;
320 xen_boot_binary_load (struct xen_boot_binary *binary, grub_file_t file,
321 int argc, char *argv[])
323 binary->size = grub_file_size (file);
324 grub_dprintf ("xen_loader", "Xen_boot file size: 0x%lx\n", binary->size);
327 = (grub_addr_t) grub_efi_allocate_pages (0,
328 GRUB_EFI_BYTES_TO_PAGES
333 grub_error (GRUB_ERR_OUT_OF_MEMORY, N_("out of memory"));
337 grub_dprintf ("xen_loader", "Xen_boot numpages: 0x%lx\n",
338 GRUB_EFI_BYTES_TO_PAGES (binary->size + binary->align));
340 if (grub_file_read (file, (void *) xen_boot_address_align (binary->start,
342 binary->size) != (grub_ssize_t) binary->size)
344 single_binary_unload (binary);
345 grub_error (GRUB_ERR_BAD_OS, N_("premature end of file %s"), argv[0]);
351 binary->cmdline_size = grub_loader_cmdline_size (argc - 1, argv + 1);
352 binary->cmdline = grub_zalloc (binary->cmdline_size);
353 if (!binary->cmdline)
355 single_binary_unload (binary);
356 grub_error (GRUB_ERR_OUT_OF_MEMORY, N_("out of memory"));
359 grub_create_loader_cmdline (argc - 1, argv + 1, binary->cmdline,
360 binary->cmdline_size);
361 grub_dprintf ("xen_loader",
362 "Xen_boot cmdline @ %p %s, size: %d\n",
363 binary->cmdline, binary->cmdline, binary->cmdline_size);
367 binary->cmdline_size = 0;
368 binary->cmdline = NULL;
371 grub_errno = GRUB_ERR_NONE;
376 grub_cmd_xen_module (grub_command_t cmd __attribute__((unused)),
377 int argc, char *argv[])
380 struct xen_boot_binary *module = NULL;
381 grub_file_t file = 0;
385 grub_error (GRUB_ERR_BAD_ARGUMENT, N_("filename expected"));
391 grub_error (GRUB_ERR_BAD_ARGUMENT,
392 N_("you need to load the Xen Hypervisor first"));
397 (struct xen_boot_binary *) grub_zalloc (sizeof (struct xen_boot_binary));
401 module->is_hypervisor = 0;
402 module->align = 4096;
404 grub_dprintf ("xen_loader", "Init module and node info\n");
406 file = grub_file_open (argv[0]);
410 xen_boot_binary_load (module, file, argc, argv);
411 if (grub_errno == GRUB_ERR_NONE)
412 grub_list_push (GRUB_AS_LIST_P (&module_head), GRUB_AS_LIST (module));
416 grub_file_close (file);
417 if (grub_errno != GRUB_ERR_NONE)
418 single_binary_unload (module);
424 grub_cmd_xen_hypervisor (grub_command_t cmd __attribute__ ((unused)),
425 int argc, char *argv[])
427 struct xen_hypervisor_header sh;
428 grub_file_t file = NULL;
430 grub_dl_ref (my_mod);
434 grub_error (GRUB_ERR_BAD_ARGUMENT, N_("filename expected"));
438 file = grub_file_open (argv[0]);
442 if (grub_file_read (file, &sh, sizeof (sh)) != (long) sizeof (sh))
444 if (grub_arm64_uefi_check_image
445 ((struct grub_arm64_linux_kernel_header *) &sh) != GRUB_ERR_NONE)
447 grub_file_seek (file, 0);
449 /* if another module has called grub_loader_set,
450 we need to make sure that another module is unloaded properly */
451 grub_loader_unset ();
454 (struct xen_boot_binary *) grub_zalloc (sizeof (struct xen_boot_binary));
458 xen_hypervisor->is_hypervisor = 1;
459 xen_hypervisor->align = (grub_size_t) sh.optional_header.section_alignment;
461 xen_boot_binary_load (xen_hypervisor, file, argc, argv);
462 if (grub_errno == GRUB_ERR_NONE)
464 grub_loader_set (xen_boot, xen_unload, 0);
470 grub_file_close (file);
471 if (grub_errno != GRUB_ERR_NONE)
474 all_binaries_unload ();
475 grub_dl_unref (my_mod);
481 static grub_command_t cmd_xen_hypervisor;
482 static grub_command_t cmd_xen_module;
484 GRUB_MOD_INIT (xen_boot)
487 grub_register_command ("xen_hypervisor", grub_cmd_xen_hypervisor, 0,
488 N_("Load a xen hypervisor."));
490 grub_register_command ("xen_module", grub_cmd_xen_module, 0,
491 N_("Load a xen module."));
495 GRUB_MOD_FINI (xen_boot)
497 grub_unregister_command (cmd_xen_hypervisor);
498 grub_unregister_command (cmd_xen_module);