arm64: Add support for xen boot protocol.
This commit is contained in:
Fu Wei
Vladimir Serbinenko
parent
4d0cb75538
commit
83cb45e982
2 changed files with 603 additions and 0 deletions
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@ -1646,6 +1646,13 @@ module = {
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enable = x86;
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};
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module = {
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name = xen_boot;
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common = lib/cmdline.c;
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arm64 = loader/arm64/xen_boot.c;
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enable = arm64;
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};
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module = {
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name = linux;
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x86 = loader/i386/linux.c;
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596
grub-core/loader/arm64/xen_boot.c
Normal file
596
grub-core/loader/arm64/xen_boot.c
Normal file
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@ -0,0 +1,596 @@
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2014 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/cache.h>
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#include <grub/charset.h>
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#include <grub/command.h>
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#include <grub/err.h>
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#include <grub/file.h>
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#include <grub/fdt.h>
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#include <grub/list.h>
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#include <grub/loader.h>
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#include <grub/misc.h>
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#include <grub/mm.h>
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#include <grub/types.h>
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#include <grub/cpu/fdtload.h>
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#include <grub/cpu/linux.h>
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#include <grub/efi/efi.h>
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#include <grub/efi/pe32.h> /* required by struct xen_hypervisor_header */
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#include <grub/i18n.h>
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#include <grub/lib/cmdline.h>
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GRUB_MOD_LICENSE ("GPLv3+");
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#define XEN_HYPERVISOR_NAME "xen_hypervisor"
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#define MODULE_DEFAULT_ALIGN (0x0)
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#define MODULE_IMAGE_MIN_ALIGN MODULE_DEFAULT_ALIGN
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#define MODULE_INITRD_MIN_ALIGN MODULE_DEFAULT_ALIGN
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#define MODULE_XSM_MIN_ALIGN MODULE_DEFAULT_ALIGN
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#define MODULE_CUSTOM_MIN_ALIGN MODULE_DEFAULT_ALIGN
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#define MODULE_IMAGE_COMPATIBLE "multiboot,kernel\0multiboot,module"
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#define MODULE_INITRD_COMPATIBLE "multiboot,ramdisk\0multiboot,module"
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#define MODULE_XSM_COMPATIBLE "xen,xsm-policy\0multiboot,module"
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#define MODULE_CUSTOM_COMPATIBLE "multiboot,module"
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/* This maximum size is defined in Power.org ePAPR V1.1
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* https://www.power.org/documentation/epapr-version-1-1/
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* 2.2.1.1 Node Name Requirements
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* node-name@unit-address
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* 31 + 1(@) + 16(64bit address in hex format) + 1(\0) = 49
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*/
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#define FDT_NODE_NAME_MAX_SIZE (49)
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struct compat_string_struct
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{
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grub_size_t size;
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const char *compat_string;
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};
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typedef struct compat_string_struct compat_string_struct_t;
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#define FDT_COMPATIBLE(x) {.size = sizeof(x), .compat_string = (x)}
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enum module_type
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{
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MODULE_IMAGE,
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MODULE_INITRD,
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MODULE_XSM,
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MODULE_CUSTOM
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};
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typedef enum module_type module_type_t;
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struct fdt_node_info
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{
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module_type_t type;
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const char *compat_string;
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grub_size_t compat_string_size;
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};
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struct xen_hypervisor_header
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{
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struct grub_arm64_linux_kernel_header efi_head;
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/* This is always PE\0\0. */
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grub_uint8_t signature[GRUB_PE32_SIGNATURE_SIZE];
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/* The COFF file header. */
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struct grub_pe32_coff_header coff_header;
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/* The Optional header. */
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struct grub_pe64_optional_header optional_header;
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};
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struct xen_boot_binary
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{
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struct xen_boot_binary *next;
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struct xen_boot_binary **prev;
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const char *name;
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grub_addr_t start;
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grub_size_t size;
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grub_size_t align;
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char *cmdline;
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int cmdline_size;
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struct fdt_node_info node_info;
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};
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static grub_dl_t my_mod;
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static int loaded;
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static struct xen_boot_binary *xen_hypervisor;
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static struct xen_boot_binary *module_head;
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static const grub_size_t module_default_align[] = {
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MODULE_IMAGE_MIN_ALIGN,
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MODULE_INITRD_MIN_ALIGN,
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MODULE_XSM_MIN_ALIGN,
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MODULE_CUSTOM_MIN_ALIGN
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};
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static const compat_string_struct_t default_compat_string[] = {
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FDT_COMPATIBLE (MODULE_IMAGE_COMPATIBLE),
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FDT_COMPATIBLE (MODULE_INITRD_COMPATIBLE),
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FDT_COMPATIBLE (MODULE_XSM_COMPATIBLE),
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FDT_COMPATIBLE (MODULE_CUSTOM_COMPATIBLE)
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};
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static __inline grub_addr_t
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xen_boot_address_align (grub_addr_t start, grub_size_t align)
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{
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return (align ? (ALIGN_UP (start, align)) : start);
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}
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/* Parse the option of xen_module command. For now, we support
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(1) --type <the compatible stream>
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We also set up the type of module in this function.
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If there are some "--type" options in the command line,
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we make a custom compatible stream in this function. */
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static grub_err_t
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set_module_type (grub_command_t cmd, struct xen_boot_binary *module, int *file_name_index)
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{
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*file_name_index = 0;
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if (!grub_strcmp (cmd->name, "xen_linux"))
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module->node_info.type = MODULE_IMAGE;
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else if (!grub_strcmp (cmd->name, "xen_initrd"))
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module->node_info.type = MODULE_INITRD;
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else if (!grub_strcmp (cmd->name, "xen_xsm"))
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module->node_info.type = MODULE_XSM;
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return GRUB_ERR_NONE;
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}
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static grub_err_t
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prepare_xen_hypervisor_params (void *xen_boot_fdt)
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{
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int chosen_node = 0;
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int retval;
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chosen_node = grub_fdt_find_subnode (xen_boot_fdt, 0, "chosen");
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if (chosen_node < 0)
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chosen_node = grub_fdt_add_subnode (xen_boot_fdt, 0, "chosen");
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if (chosen_node < 1)
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return grub_error (GRUB_ERR_IO, "failed to get chosen node in FDT");
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grub_dprintf ("xen_loader",
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"Xen Hypervisor cmdline : %s @ %p size:%d\n",
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xen_hypervisor->cmdline, xen_hypervisor->cmdline,
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xen_hypervisor->cmdline_size);
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retval = grub_fdt_set_prop (xen_boot_fdt, chosen_node, "bootargs",
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xen_hypervisor->cmdline,
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xen_hypervisor->cmdline_size);
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if (retval)
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return grub_error (GRUB_ERR_IO, "failed to install/update FDT");
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return GRUB_ERR_NONE;
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}
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static grub_err_t
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prepare_xen_module_params (struct xen_boot_binary *module, void *xen_boot_fdt)
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{
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int retval, chosen_node = 0, module_node = 0;
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char module_name[FDT_NODE_NAME_MAX_SIZE];
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retval = grub_snprintf (module_name, FDT_NODE_NAME_MAX_SIZE, "module@%lx",
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xen_boot_address_align (module->start,
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module->align));
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grub_dprintf ("xen_loader", "Module node name %s \n", module_name);
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if (retval < (int) sizeof ("module@"))
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return grub_error (GRUB_ERR_IO, N_("failed to get FDT"));
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chosen_node = grub_fdt_find_subnode (xen_boot_fdt, 0, "chosen");
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if (chosen_node < 0)
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chosen_node = grub_fdt_add_subnode (xen_boot_fdt, 0, "chosen");
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if (chosen_node < 1)
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return grub_error (GRUB_ERR_IO, "failed to get chosen node in FDT");
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module_node =
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grub_fdt_find_subnode (xen_boot_fdt, chosen_node, module_name);
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if (module_node < 0)
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module_node =
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grub_fdt_add_subnode (xen_boot_fdt, chosen_node, module_name);
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retval = grub_fdt_set_prop (xen_boot_fdt, module_node, "compatible",
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module->node_info.compat_string,
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(grub_uint32_t) module->
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node_info.compat_string_size);
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if (retval)
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return grub_error (GRUB_ERR_IO, "failed to update FDT");
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grub_dprintf ("xen_loader", "Module %s compatible = %s size = 0x%lx\n",
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module->name, module->node_info.compat_string,
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module->node_info.compat_string_size);
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retval = grub_fdt_set_reg64 (xen_boot_fdt, module_node,
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xen_boot_address_align (module->start,
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module->align),
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module->size);
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if (retval)
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return grub_error (GRUB_ERR_IO, "failed to update FDT");
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if (module->cmdline && module->cmdline_size > 0)
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{
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grub_dprintf ("xen_loader",
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"Module %s cmdline : %s @ %p size:%d\n", module->name,
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module->cmdline, module->cmdline, module->cmdline_size);
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retval = grub_fdt_set_prop (xen_boot_fdt, module_node, "bootargs",
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module->cmdline, module->cmdline_size + 1);
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if (retval)
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return grub_error (GRUB_ERR_IO, "failed to update FDT");
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}
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else
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{
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grub_dprintf ("xen_loader", "Module %s has not bootargs!\n",
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module->name);
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}
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return GRUB_ERR_NONE;
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}
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static grub_err_t
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finalize_params_xen_boot (void)
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{
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struct xen_boot_binary *module;
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void *xen_boot_fdt;
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grub_size_t additional_size = 0x1000;
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/* Hypervisor. */
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additional_size += FDT_NODE_NAME_MAX_SIZE + xen_hypervisor->cmdline_size;
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FOR_LIST_ELEMENTS (module, module_head)
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{
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additional_size += 6 * FDT_NODE_NAME_MAX_SIZE + module->
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node_info.compat_string_size + module->cmdline_size;
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}
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xen_boot_fdt = grub_fdt_load (additional_size);
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if (!xen_boot_fdt)
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return grub_error (GRUB_ERR_IO, "failed to get FDT");
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if (xen_hypervisor)
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{
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if (prepare_xen_hypervisor_params (xen_boot_fdt) != GRUB_ERR_NONE)
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goto fail;
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}
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else
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{
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grub_dprintf ("xen_loader", "Failed to get Xen Hypervisor info!\n");
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goto fail;
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}
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/* Set module params info */
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FOR_LIST_ELEMENTS (module, module_head)
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{
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if (module->start && module->size > 0)
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{
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grub_dprintf ("xen_loader", "Module %s @ 0x%lx size:0x%lx\n",
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module->name,
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xen_boot_address_align (module->start, module->align),
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module->size);
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if (prepare_xen_module_params (module, xen_boot_fdt) != GRUB_ERR_NONE)
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goto fail;
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}
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else
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{
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grub_dprintf ("xen_loader", "Module info error: %s!\n", module->name);
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goto fail;
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}
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}
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if (grub_fdt_install() == GRUB_ERR_NONE)
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return GRUB_ERR_NONE;
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fail:
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grub_fdt_unload ();
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return grub_error (GRUB_ERR_IO, "failed to install/update FDT");
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}
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static grub_err_t
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xen_boot (void)
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{
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grub_err_t err = finalize_params_xen_boot ();
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if (err)
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return err;
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return grub_arm64_uefi_boot_image (xen_hypervisor->start,
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xen_hypervisor->size,
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xen_hypervisor->cmdline);
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}
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static void
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single_binary_unload (struct xen_boot_binary *binary)
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{
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if (!binary)
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return;
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if (binary->start && binary->size > 0)
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{
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grub_efi_free_pages ((grub_efi_physical_address_t) binary->start,
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GRUB_EFI_BYTES_TO_PAGES (binary->size + binary->align));
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}
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if (binary->cmdline && binary->cmdline_size > 0)
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{
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grub_free (binary->cmdline);
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grub_dprintf ("xen_loader",
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"Module %s cmdline memory free @ %p size: %d\n",
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binary->name, binary->cmdline, binary->cmdline_size);
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}
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if (binary->node_info.type == MODULE_CUSTOM)
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grub_free ((void *) binary->node_info.compat_string);
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if (grub_strcmp (binary->name, XEN_HYPERVISOR_NAME))
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grub_list_remove (GRUB_AS_LIST (binary));
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grub_dprintf ("xen_loader",
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"Module %s struct memory free @ %p size: 0x%lx\n",
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binary->name, binary, sizeof (binary));
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grub_free (binary);
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return;
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}
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static void
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all_binaries_unload (void)
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{
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struct xen_boot_binary *binary;
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FOR_LIST_ELEMENTS (binary, module_head)
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{
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single_binary_unload (binary);
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}
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if (xen_hypervisor)
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single_binary_unload (xen_hypervisor);
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return;
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}
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static grub_err_t
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xen_unload (void)
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{
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loaded = 0;
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all_binaries_unload ();
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grub_fdt_unload ();
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grub_dl_unref (my_mod);
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return GRUB_ERR_NONE;
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}
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static void
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xen_boot_binary_load (struct xen_boot_binary *binary, grub_file_t file,
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int argc, char *argv[])
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{
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binary->size = grub_file_size (file);
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grub_dprintf ("xen_loader", "Xen_boot %s file size: 0x%lx\n",
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binary->name, binary->size);
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binary->start
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= (grub_addr_t) grub_efi_allocate_pages (0,
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GRUB_EFI_BYTES_TO_PAGES
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(binary->size +
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binary->align));
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if (!binary->start)
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{
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grub_error (GRUB_ERR_OUT_OF_MEMORY, N_("out of memory"));
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return;
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}
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grub_dprintf ("xen_loader", "Xen_boot %s numpages: 0x%lx\n",
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binary->name, GRUB_EFI_BYTES_TO_PAGES (binary->size + binary->align));
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if (grub_file_read (file, (void *) xen_boot_address_align (binary->start,
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binary->align),
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binary->size) != (grub_ssize_t) binary->size)
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{
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single_binary_unload (binary);
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grub_error (GRUB_ERR_BAD_OS, N_("premature end of file %s"), argv[0]);
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return;
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}
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if (argc > 1)
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{
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binary->cmdline_size = grub_loader_cmdline_size (argc - 1, argv + 1);
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binary->cmdline = grub_zalloc (binary->cmdline_size);
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if (!binary->cmdline)
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{
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single_binary_unload (binary);
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grub_error (GRUB_ERR_OUT_OF_MEMORY, N_("out of memory"));
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return;
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}
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grub_create_loader_cmdline (argc - 1, argv + 1, binary->cmdline,
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binary->cmdline_size);
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grub_dprintf ("xen_loader",
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"Xen_boot %s cmdline @ %p %s, size: %d\n", binary->name,
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binary->cmdline, binary->cmdline, binary->cmdline_size);
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}
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else
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{
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binary->cmdline_size = 0;
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binary->cmdline = NULL;
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}
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grub_errno = GRUB_ERR_NONE;
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return;
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}
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static grub_err_t
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grub_cmd_xen_module (grub_command_t cmd, int argc, char *argv[])
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{
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struct xen_boot_binary *module = NULL;
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int file_name_index = 0;
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grub_file_t file = 0;
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if (!argc)
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{
|
||||
grub_error (GRUB_ERR_BAD_ARGUMENT, N_("filename expected"));
|
||||
goto fail;
|
||||
}
|
||||
|
||||
if (!loaded)
|
||||
{
|
||||
grub_error (GRUB_ERR_BAD_ARGUMENT,
|
||||
N_("you need to load the Xen Hypervisor first"));
|
||||
goto fail;
|
||||
}
|
||||
|
||||
module =
|
||||
(struct xen_boot_binary *) grub_zalloc (sizeof (struct xen_boot_binary));
|
||||
if (!module)
|
||||
return grub_errno;
|
||||
|
||||
/* process all the options and get module type */
|
||||
if (set_module_type (cmd, module, &file_name_index) !=
|
||||
GRUB_ERR_NONE)
|
||||
goto fail;
|
||||
switch (module->node_info.type)
|
||||
{
|
||||
case MODULE_IMAGE:
|
||||
case MODULE_INITRD:
|
||||
case MODULE_XSM:
|
||||
module->node_info.compat_string =
|
||||
default_compat_string[module->node_info.type].compat_string;
|
||||
module->node_info.compat_string_size =
|
||||
default_compat_string[module->node_info.type].size;
|
||||
break;
|
||||
|
||||
case MODULE_CUSTOM:
|
||||
/* we have set the node_info in set_module_type */
|
||||
break;
|
||||
|
||||
default:
|
||||
return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("invalid argument"));
|
||||
}
|
||||
module->name = module->node_info.compat_string;
|
||||
module->align = module_default_align[module->node_info.type];
|
||||
|
||||
grub_dprintf ("xen_loader", "Init %s module and node info:\n"
|
||||
"compatible %s\ncompat_string_size 0x%lx\n",
|
||||
module->name, module->node_info.compat_string,
|
||||
module->node_info.compat_string_size);
|
||||
|
||||
file = grub_file_open (argv[file_name_index]);
|
||||
if (!file)
|
||||
goto fail;
|
||||
|
||||
xen_boot_binary_load (module, file, argc - file_name_index,
|
||||
argv + file_name_index);
|
||||
if (grub_errno == GRUB_ERR_NONE)
|
||||
grub_list_push (GRUB_AS_LIST_P (&module_head), GRUB_AS_LIST (module));
|
||||
|
||||
fail:
|
||||
if (file)
|
||||
grub_file_close (file);
|
||||
if (grub_errno != GRUB_ERR_NONE)
|
||||
single_binary_unload (module);
|
||||
|
||||
return grub_errno;
|
||||
}
|
||||
|
||||
static grub_err_t
|
||||
grub_cmd_xen_hypervisor (grub_command_t cmd __attribute__ ((unused)),
|
||||
int argc, char *argv[])
|
||||
{
|
||||
struct xen_hypervisor_header sh;
|
||||
grub_file_t file = NULL;
|
||||
|
||||
grub_dl_ref (my_mod);
|
||||
|
||||
if (!argc)
|
||||
{
|
||||
grub_error (GRUB_ERR_BAD_ARGUMENT, N_("filename expected"));
|
||||
goto fail;
|
||||
}
|
||||
|
||||
file = grub_file_open (argv[0]);
|
||||
if (!file)
|
||||
goto fail;
|
||||
|
||||
if (grub_file_read (file, &sh, sizeof (sh)) != (long) sizeof (sh))
|
||||
goto fail;
|
||||
if (grub_arm64_uefi_check_image
|
||||
((struct grub_arm64_linux_kernel_header *) &sh) != GRUB_ERR_NONE)
|
||||
goto fail;
|
||||
grub_file_seek (file, 0);
|
||||
|
||||
/* if another module has called grub_loader_set,
|
||||
we need to make sure that another module is unloaded properly */
|
||||
grub_loader_unset ();
|
||||
|
||||
xen_hypervisor =
|
||||
(struct xen_boot_binary *) grub_zalloc (sizeof (struct xen_boot_binary));
|
||||
if (!xen_hypervisor)
|
||||
return grub_errno;
|
||||
|
||||
xen_hypervisor->name = XEN_HYPERVISOR_NAME;
|
||||
xen_hypervisor->align = (grub_size_t) sh.optional_header.section_alignment;
|
||||
|
||||
xen_boot_binary_load (xen_hypervisor, file, argc, argv);
|
||||
if (grub_errno == GRUB_ERR_NONE)
|
||||
{
|
||||
grub_loader_set (xen_boot, xen_unload, 0);
|
||||
loaded = 1;
|
||||
}
|
||||
|
||||
fail:
|
||||
if (file)
|
||||
grub_file_close (file);
|
||||
if (grub_errno != GRUB_ERR_NONE)
|
||||
{
|
||||
loaded = 0;
|
||||
all_binaries_unload ();
|
||||
grub_dl_unref (my_mod);
|
||||
}
|
||||
|
||||
return grub_errno;
|
||||
}
|
||||
|
||||
static grub_command_t cmd_xen_hypervisor;
|
||||
static grub_command_t cmd_xen_linux, cmd_xen_initrd, cmd_xen_xsm;
|
||||
|
||||
GRUB_MOD_INIT (xen_boot)
|
||||
{
|
||||
cmd_xen_hypervisor =
|
||||
grub_register_command ("xen_hypervisor", grub_cmd_xen_hypervisor, 0,
|
||||
N_("Load a xen hypervisor."));
|
||||
cmd_xen_linux =
|
||||
grub_register_command ("xen_linux", grub_cmd_xen_module, 0,
|
||||
N_("Load a xen linux kernel for dom0."));
|
||||
cmd_xen_initrd =
|
||||
grub_register_command ("xen_initrd", grub_cmd_xen_module, 0,
|
||||
N_("Load a xen initrd for dom0."));
|
||||
cmd_xen_xsm =
|
||||
grub_register_command ("xen_xsm", grub_cmd_xen_module, 0,
|
||||
N_("Load a xen security module."));
|
||||
my_mod = mod;
|
||||
}
|
||||
|
||||
GRUB_MOD_FINI (xen_boot)
|
||||
{
|
||||
grub_unregister_command (cmd_xen_hypervisor);
|
||||
grub_unregister_command (cmd_xen_linux);
|
||||
grub_unregister_command (cmd_xen_initrd);
|
||||
grub_unregister_command (cmd_xen_xsm);
|
||||
}
|
||||
Loading…
Reference in a new issue