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Re: [PATCH v3 2/4] arm64: Add xen_boot module file
From: |
Fu Wei |
Subject: |
Re: [PATCH v3 2/4] arm64: Add xen_boot module file |
Date: |
Fri, 30 Oct 2015 16:08:54 +0800 |
Hi Vladimir,
yes, Thanks for your modification :-)
I just follow the xen boot protocol :
http://wiki.xen.org/wiki/Xen_ARM_with_Virtualization_Extensions/Multiboot
xen_module is just for "--type" option, I will discuss this with Xen
developer for this.
If we need this option, I will resubmit it :-)
Great thanks!
On 29 October 2015 at 22:27, Vladimir 'φ-coder/phcoder' Serbinenko
<address@hidden> wrote:
> Committed without the xen_module command. Its argument parsing was
> non-trivial and I don't quite get what its intent is. Can you resubmit?
> On 23.07.2015 07:16, address@hidden wrote:
>> From: Fu Wei <address@hidden>
>>
>> grub-core/loader/arm64/xen_boot.c
>>
>> - This adds support for the Xen boot on ARM specification for arm64.
>> - Introduce xen_hypervisor, xen_linux, xen_initrd and xen_xsm
>> to load different binaries for xen boot;
>> Introduce xen_module to load common or custom module for xen boot.
>> - This Xen boot support is a separated module for aarch64,
>> but reuse the existing code of devicetree in linux module.
>>
>> Signed-off-by: Fu Wei <address@hidden>
>> ---
>> grub-core/Makefile.core.def | 7 +
>> grub-core/loader/arm64/xen_boot.c | 685
>> ++++++++++++++++++++++++++++++++++++++
>> 2 files changed, 692 insertions(+)
>>
>> diff --git a/grub-core/Makefile.core.def b/grub-core/Makefile.core.def
>> index a6101de..796f7e9 100644
>> --- a/grub-core/Makefile.core.def
>> +++ b/grub-core/Makefile.core.def
>> @@ -1648,6 +1648,13 @@ module = {
>> };
>>
>> module = {
>> + name = xen_boot;
>> + common = lib/cmdline.c;
>> + arm64 = loader/arm64/xen_boot.c;
>> + enable = arm64;
>> +};
>> +
>> +module = {
>> name = linux;
>> x86 = loader/i386/linux.c;
>> xen = loader/i386/xen.c;
>> diff --git a/grub-core/loader/arm64/xen_boot.c
>> b/grub-core/loader/arm64/xen_boot.c
>> new file mode 100644
>> index 0000000..33a65dd
>> --- /dev/null
>> +++ b/grub-core/loader/arm64/xen_boot.c
>> @@ -0,0 +1,685 @@
>> +/*
>> + * GRUB -- GRand Unified Bootloader
>> + * Copyright (C) 2014 Free Software Foundation, Inc.
>> + *
>> + * GRUB is free software: you can redistribute it and/or modify
>> + * it under the terms of the GNU General Public License as published by
>> + * the Free Software Foundation, either version 3 of the License, or
>> + * (at your option) any later version.
>> + *
>> + * GRUB is distributed in the hope that it will be useful,
>> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
>> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
>> + * GNU General Public License for more details.
>> + *
>> + * You should have received a copy of the GNU General Public License
>> + * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
>> + */
>> +
>> +#include <grub/cache.h>
>> +#include <grub/charset.h>
>> +#include <grub/command.h>
>> +#include <grub/err.h>
>> +#include <grub/file.h>
>> +#include <grub/fdt.h>
>> +#include <grub/linux.h>
>> +#include <grub/list.h>
>> +#include <grub/loader.h>
>> +#include <grub/misc.h>
>> +#include <grub/mm.h>
>> +#include <grub/types.h>
>> +#include <grub/cpu/linux.h>
>> +#include <grub/efi/efi.h>
>> +#include <grub/efi/pe32.h> /* required by struct xen_hypervisor_header */
>> +#include <grub/i18n.h>
>> +#include <grub/lib/cmdline.h>
>> +
>> +GRUB_MOD_LICENSE ("GPLv3+");
>> +
>> +#define XEN_HYPERVISOR_NAME "xen_hypervisor"
>> +
>> +#define MODULE_DEFAULT_ALIGN (0x0)
>> +#define MODULE_IMAGE_MIN_ALIGN MODULE_DEFAULT_ALIGN
>> +#define MODULE_INITRD_MIN_ALIGN MODULE_DEFAULT_ALIGN
>> +#define MODULE_XSM_MIN_ALIGN MODULE_DEFAULT_ALIGN
>> +#define MODULE_CUSTOM_MIN_ALIGN MODULE_DEFAULT_ALIGN
>> +
>> +/* #define MODULE_IMAGE_COMPATIBLE "xen,linux-image\0xen,module"
>> +#define MODULE_INITRD_COMPATIBLE "xen,linux-image\0xen,module"
>> +#define MODULE_XSM_COMPATIBLE "xen,xsm-policy\0xen,module"
>> +#define MODULE_CUSTOM_COMPATIBLE "xen,module" */
>> +#define MODULE_IMAGE_COMPATIBLE "multiboot,kernel\0multiboot,module"
>> +#define MODULE_INITRD_COMPATIBLE "multiboot,ramdisk\0multiboot,module"
>> +#define MODULE_XSM_COMPATIBLE "xen,xsm-policy\0multiboot,module"
>> +#define MODULE_CUSTOM_COMPATIBLE "multiboot,module"
>> +
>> +/* This maximum size is defined in Power.org ePAPR V1.1
>> + * https://www.power.org/documentation/epapr-version-1-1/
>> + * 2.2.1.1 Node Name Requirements
>> + * address@hidden
>> + * 31 + 1(@) + 16(64bit address in hex format) + 1(\0) = 49
>> + */
>> +#define FDT_NODE_NAME_MAX_SIZE (49)
>> +
>> +#define ARG_SHIFT(argc, argv) \
>> + do { \
>> + (argc)--; \
>> + (argv)++; \
>> + } while (0)
>> +
>> +struct compat_string_struct
>> +{
>> + grub_size_t size;
>> + const char *compat_string;
>> +};
>> +typedef struct compat_string_struct compat_string_struct_t;
>> +#define FDT_COMPATIBLE(x) {.size = sizeof(x), .compat_string = (x)}
>> +
>> +enum module_type
>> +{
>> + MODULE_IMAGE,
>> + MODULE_INITRD,
>> + MODULE_XSM,
>> + MODULE_CUSTOM
>> +};
>> +typedef enum module_type module_type_t;
>> +
>> +struct fdt_node_info
>> +{
>> + module_type_t type;
>> +
>> + const char *compat_string;
>> + grub_size_t compat_string_size;
>> +};
>> +
>> +struct xen_hypervisor_header
>> +{
>> + struct grub_arm64_linux_kernel_header efi_head;
>> +
>> + /* This is always PE\0\0. */
>> + grub_uint8_t signature[GRUB_PE32_SIGNATURE_SIZE];
>> + /* The COFF file header. */
>> + struct grub_pe32_coff_header coff_header;
>> + /* The Optional header. */
>> + struct grub_pe64_optional_header optional_header;
>> +};
>> +
>> +struct xen_boot_binary
>> +{
>> + struct xen_boot_binary *next;
>> + struct xen_boot_binary **prev;
>> + const char *name;
>> +
>> + grub_addr_t start;
>> + grub_size_t size;
>> + grub_size_t align;
>> +
>> + char *cmdline;
>> + int cmdline_size;
>> +
>> + struct fdt_node_info node_info;
>> +};
>> +
>> +static grub_dl_t my_mod;
>> +
>> +static struct xen_boot_binary *xen_hypervisor;
>> +static struct xen_boot_binary *module_head;
>> +static const grub_size_t module_default_align[] = {
>> + MODULE_IMAGE_MIN_ALIGN,
>> + MODULE_INITRD_MIN_ALIGN,
>> + MODULE_XSM_MIN_ALIGN,
>> + MODULE_CUSTOM_MIN_ALIGN
>> +};
>> +
>> +static void *xen_boot_fdt;
>> +static const compat_string_struct_t default_compat_string[] = {
>> + FDT_COMPATIBLE (MODULE_IMAGE_COMPATIBLE),
>> + FDT_COMPATIBLE (MODULE_INITRD_COMPATIBLE),
>> + FDT_COMPATIBLE (MODULE_XSM_COMPATIBLE),
>> + FDT_COMPATIBLE (MODULE_CUSTOM_COMPATIBLE)
>> +};
>> +
>> +static __inline grub_addr_t
>> +xen_boot_address_align (grub_addr_t start, grub_size_t align)
>> +{
>> + return (align ? (ALIGN_UP (start, align)) : start);
>> +}
>> +
>> +/* Parse the option of xen_module command. For now, we support
>> + (1) --type <the compatible stream>
>> + We also set up the type of module in this function.
>> + If there are some "--type" options in the command line,
>> + we make a custom compatible stream in this function. */
>> +static grub_err_t
>> +set_module_type (grub_command_t cmd, struct xen_boot_binary *module,
>> + int argc, char *argv[], int *file_name_index)
>> +{
>> + char **compat_string_temp_array;
>> + grub_size_t total_size = 0;
>> + int num_types = 0, i;
>> + char *temp = NULL;
>> +
>> + *file_name_index = 0;
>> +
>> + if (!grub_strcmp (cmd->name, "xen_linux"))
>> + module->node_info.type = MODULE_IMAGE;
>> + else if (!grub_strcmp (cmd->name, "xen_initrd"))
>> + module->node_info.type = MODULE_INITRD;
>> + else if (!grub_strcmp (cmd->name, "xen_xsm"))
>> + module->node_info.type = MODULE_XSM;
>> + else if (!grub_strcmp (cmd->name, "xen_module"))
>> + module->node_info.type = MODULE_CUSTOM;
>> +
>> + /* if there are some options we need to process. */
>> + if (module->node_info.type == MODULE_CUSTOM)
>> + {
>> + compat_string_temp_array =
>> + (char **) grub_zalloc (sizeof (char *) * argc);
>> + if (!compat_string_temp_array)
>> + return grub_errno;
>> + /* the module type is set by "--type"(MODULE_CUSTOM) */
>> + while (argc > 2 && !grub_strcmp (argv[0], "--type"))
>> + {
>> + module->node_info.type = MODULE_CUSTOM;
>> + ARG_SHIFT (argc, argv);
>> + total_size += grub_strlen (argv[0]) + 1;
>> + compat_string_temp_array[num_types++] = argv[0];
>> + ARG_SHIFT (argc, argv);
>> + (*file_name_index) += 2;
>> + }
>> +
>> + if (total_size)
>> + {
>> + module->node_info.compat_string = temp =
>> + (char *) grub_zalloc (total_size);
>> + if (!temp)
>> + {
>> + grub_free (compat_string_temp_array);
>> + return grub_errno;
>> + }
>> +
>> + module->node_info.compat_string_size = total_size;
>> + for (i = 0; num_types > 0; num_types--, i++, temp++)
>> + {
>> + grub_strcpy (temp, compat_string_temp_array[i]);
>> + temp += grub_strlen (compat_string_temp_array[i]);
>> + }
>> + }
>> + else
>> + {
>> + module->node_info.compat_string =
>> + default_compat_string[MODULE_CUSTOM].compat_string;
>> + module->node_info.compat_string_size =
>> + default_compat_string[MODULE_CUSTOM].size;
>> + }
>> +
>> + grub_free (compat_string_temp_array);
>> + }
>> +
>> + return GRUB_ERR_NONE;
>> +}
>> +
>> +static grub_err_t
>> +prepare_xen_hypervisor_params (void)
>> +{
>> + int chosen_node = 0;
>> + int retval;
>> +
>> + xen_boot_fdt = grub_linux_get_fdt ();
>> + if (!xen_boot_fdt)
>> + return grub_error (GRUB_ERR_IO, "failed to get FDT");
>> +
>> + chosen_node = grub_fdt_find_subnode (xen_boot_fdt, 0, "chosen");
>> + if (chosen_node < 0)
>> + chosen_node = grub_fdt_add_subnode (xen_boot_fdt, 0, "chosen");
>> + if (chosen_node < 1)
>> + return grub_error (GRUB_ERR_IO, "failed to get chosen node in FDT");
>> +
>> + grub_dprintf ("xen_loader",
>> + "Xen Hypervisor cmdline : %s @ %p size:%d\n",
>> + xen_hypervisor->cmdline, xen_hypervisor->cmdline,
>> + xen_hypervisor->cmdline_size);
>> +
>> + retval = grub_fdt_set_prop (xen_boot_fdt, chosen_node, "bootargs",
>> + xen_hypervisor->cmdline,
>> + xen_hypervisor->cmdline_size);
>> + if (retval)
>> + return grub_error (GRUB_ERR_IO, "failed to install/update FDT");
>> +
>> + return GRUB_ERR_NONE;
>> +}
>> +
>> +static grub_err_t
>> +prepare_xen_module_params (struct xen_boot_binary *module)
>> +{
>> + int retval, chosen_node = 0, module_node = 0;
>> + char module_name[FDT_NODE_NAME_MAX_SIZE];
>> +
>> + retval = grub_snprintf (module_name, FDT_NODE_NAME_MAX_SIZE,
>> "address@hidden",
>> + xen_boot_address_align (module->start,
>> + module->align));
>> + grub_dprintf ("xen_loader", "Module node name %s \n", module_name);
>> +
>> + if (retval < (int) sizeof ("module@"))
>> + return grub_error (GRUB_ERR_IO, N_("failed to get FDT"));
>> +
>> + chosen_node = grub_fdt_find_subnode (xen_boot_fdt, 0, "chosen");
>> + if (chosen_node < 0)
>> + chosen_node = grub_fdt_add_subnode (xen_boot_fdt, 0, "chosen");
>> + if (chosen_node < 1)
>> + return grub_error (GRUB_ERR_IO, "failed to get chosen node in FDT");
>> +
>> + module_node =
>> + grub_fdt_find_subnode (xen_boot_fdt, chosen_node, module_name);
>> + if (module_node < 0)
>> + module_node =
>> + grub_fdt_add_subnode (xen_boot_fdt, chosen_node, module_name);
>> +
>> + retval = grub_fdt_set_prop (xen_boot_fdt, module_node, "compatible",
>> + module->node_info.compat_string,
>> + (grub_uint32_t) module->
>> + node_info.compat_string_size);
>> + if (retval)
>> + return grub_error (GRUB_ERR_IO, N_("failed to update FDT"));
>> +
>> + grub_dprintf ("xen_loader", "Module %s compatible = %s size = 0x%lx\n",
>> + module->name, module->node_info.compat_string,
>> + module->node_info.compat_string_size);
>> +
>> + retval = grub_fdt_set_reg64 (xen_boot_fdt, module_node,
>> + xen_boot_address_align (module->start,
>> + module->align),
>> + module->size);
>> + if (retval)
>> + return grub_error (GRUB_ERR_IO, N_("failed to update FDT"));
>> +
>> + if (module->cmdline && module->cmdline_size > 0)
>> + {
>> + grub_dprintf ("xen_loader",
>> + "Module %s cmdline : %s @ %p size:%d\n", module->name,
>> + module->cmdline, module->cmdline, module->cmdline_size);
>> +
>> + retval = grub_fdt_set_prop (xen_boot_fdt, module_node, "bootargs",
>> + module->cmdline, module->cmdline_size + 1);
>> + if (retval)
>> + return grub_error (GRUB_ERR_IO, "failed to update FDT");
>> + }
>> + else
>> + {
>> + grub_dprintf ("xen_loader", "Module %s has not bootargs!\n",
>> + module->name);
>> + }
>> +
>> + return GRUB_ERR_NONE;
>> +}
>> +
>> +static grub_err_t
>> +install_all_params (void)
>> +{
>> + grub_efi_guid_t fdt_guid = GRUB_EFI_DEVICE_TREE_GUID;
>> + grub_efi_boot_services_t *b;
>> + grub_efi_status_t status;
>> +
>> + b = grub_efi_system_table->boot_services;
>> + status = b->install_configuration_table (&fdt_guid, xen_boot_fdt);
>> + if (status != GRUB_EFI_SUCCESS)
>> + return grub_error (GRUB_ERR_IO, "failed to install FDT");
>> +
>> + grub_dprintf ("xen_loader",
>> + "Installed/updated FDT configuration table @ %p\n",
>> + xen_boot_fdt);
>> +
>> + return GRUB_ERR_NONE;
>> +}
>> +
>> +static grub_err_t
>> +clean_all_params (void)
>> +{
>> + if (xen_boot_fdt)
>> + {
>> + grub_efi_free_pages ((grub_efi_physical_address_t) xen_boot_fdt,
>> + BYTES_TO_PAGES (grub_fdt_get_totalsize
>> + (xen_boot_fdt)));
>> + xen_boot_fdt = NULL;
>> + }
>> +
>> + return GRUB_ERR_NONE;
>> +}
>> +
>> +static grub_err_t
>> +finalize_params_xen_boot (void)
>> +{
>> + struct xen_boot_binary *module;
>> +
>> + if (xen_hypervisor)
>> + {
>> + if (prepare_xen_hypervisor_params () != GRUB_ERR_NONE)
>> + goto fail;
>> + }
>> + else
>> + {
>> + grub_dprintf ("xen_loader", "Failed to get Xen Hypervisor info!\n");
>> + goto fail;
>> + }
>> +
>> + /* Set module params info */
>> + FOR_LIST_ELEMENTS (module, module_head)
>> + {
>> + if (module->start && module->size > 0)
>> + {
>> + grub_dprintf ("xen_loader", "Module %s @ 0x%lx size:0x%lx\n",
>> + module->name,
>> + xen_boot_address_align (module->start, module->align),
>> + module->size);
>> + if (prepare_xen_module_params (module) != GRUB_ERR_NONE)
>> + goto fail;
>> + }
>> + else
>> + {
>> + grub_dprintf ("xen_loader", "Module info error: %s!\n", module->name);
>> + goto fail;
>> + }
>> + }
>> +
>> + if (install_all_params () == GRUB_ERR_NONE)
>> + return GRUB_ERR_NONE;
>> +
>> +fail:
>> + clean_all_params ();
>> +
>> + return grub_error (GRUB_ERR_IO, "failed to install/update FDT");
>> +}
>> +
>> +
>> +static grub_err_t
>> +xen_boot (void)
>> +{
>> + grub_err_t err = finalize_params_xen_boot ();
>> + if (err)
>> + return err;
>> +
>> + return grub_arm64_uefi_boot_image (xen_hypervisor->start,
>> + xen_hypervisor->size,
>> + xen_hypervisor->cmdline);
>> +}
>> +
>> +static void
>> +single_binary_unload (struct xen_boot_binary *binary)
>> +{
>> + if (!binary)
>> + return;
>> +
>> + if (binary->start && binary->size > 0)
>> + {
>> + grub_efi_free_pages ((grub_efi_physical_address_t) binary->start,
>> + BYTES_TO_PAGES (binary->size + binary->align));
>> + }
>> +
>> + if (binary->cmdline && binary->cmdline_size > 0)
>> + {
>> + grub_free (binary->cmdline);
>> + grub_dprintf ("xen_loader",
>> + "Module %s cmdline memory free @ %p size: %d\n",
>> + binary->name, binary->cmdline, binary->cmdline_size);
>> + }
>> +
>> + if (binary->node_info.type == MODULE_CUSTOM)
>> + grub_free ((void *) binary->node_info.compat_string);
>> +
>> + if (grub_strcmp (binary->name, XEN_HYPERVISOR_NAME))
>> + grub_list_remove (GRUB_AS_LIST (binary));
>> +
>> + grub_dprintf ("xen_loader",
>> + "Module %s struct memory free @ %p size: 0x%lx\n",
>> + binary->name, binary, sizeof (binary));
>> + grub_free (binary);
>> +
>> + return;
>> +}
>> +
>> +static void
>> +all_binaries_unload (void)
>> +{
>> + struct xen_boot_binary *binary;
>> +
>> + FOR_LIST_ELEMENTS (binary, module_head)
>> + {
>> + single_binary_unload (binary);
>> + }
>> +
>> + if (xen_hypervisor)
>> + single_binary_unload (xen_hypervisor);
>> +
>> + return;
>> +}
>> +
>> +static grub_err_t
>> +xen_unload (void)
>> +{
>> + grub_linux_set_loaded (0);
>> + all_binaries_unload ();
>> + clean_all_params ();
>> + grub_dl_unref (my_mod);
>> +
>> + return GRUB_ERR_NONE;
>> +}
>> +
>> +static void
>> +xen_boot_binary_load (struct xen_boot_binary *binary, grub_file_t file,
>> + int argc, char *argv[])
>> +{
>> + binary->size = grub_file_size (file);
>> + grub_dprintf ("xen_loader", "Xen_boot %s file size: 0x%lx\n",
>> + binary->name, binary->size);
>> +
>> + binary->start = (grub_addr_t) grub_efi_allocate_pages (0,
>> + (BYTES_TO_PAGES
>> + (binary->size +
>> + binary->align)));
>> + if (!binary->start)
>> + {
>> + grub_error (GRUB_ERR_OUT_OF_MEMORY, N_("out of memory"));
>> + return;
>> + }
>> +
>> + grub_dprintf ("xen_loader", "Xen_boot %s numpages: 0x%lx\n",
>> + binary->name, BYTES_TO_PAGES (binary->size + binary->align));
>> +
>> + if (grub_file_read (file, (void *) xen_boot_address_align (binary->start,
>> + binary->align),
>> + binary->size) != (grub_ssize_t) binary->size)
>> + {
>> + single_binary_unload (binary);
>> + grub_error (GRUB_ERR_BAD_OS, N_("premature end of file %s"), argv[0]);
>> + return;
>> + }
>> +
>> + if (argc > 1)
>> + {
>> + binary->cmdline_size = grub_loader_cmdline_size (argc - 1, argv + 1);
>> + binary->cmdline = grub_zalloc (binary->cmdline_size);
>> + if (!binary->cmdline)
>> + {
>> + single_binary_unload (binary);
>> + grub_error (GRUB_ERR_OUT_OF_MEMORY, N_("out of memory"));
>> + return;
>> + }
>> + grub_create_loader_cmdline (argc - 1, argv + 1, binary->cmdline,
>> + binary->cmdline_size);
>> + grub_dprintf ("xen_loader",
>> + "Xen_boot %s cmdline @ %p %s, size: %d\n", binary->name,
>> + binary->cmdline, binary->cmdline, binary->cmdline_size);
>> + }
>> + else
>> + {
>> + binary->cmdline_size = 0;
>> + binary->cmdline = NULL;
>> + }
>> +
>> + grub_errno = GRUB_ERR_NONE;
>> + return;
>> +}
>> +
>> +static grub_err_t
>> +grub_cmd_xen_module (grub_command_t cmd, int argc, char *argv[])
>> +{
>> +
>> + struct xen_boot_binary *module = NULL;
>> + int file_name_index = 0;
>> + grub_file_t file = 0;
>> +
>> + if (!argc)
>> + {
>> + grub_error (GRUB_ERR_BAD_ARGUMENT, N_("filename expected"));
>> + goto fail;
>> + }
>> +
>> + if (!grub_linux_get_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, argc, argv, &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);
>> + grub_linux_set_loaded (1);
>> + }
>> +
>> +fail:
>> + if (file)
>> + grub_file_close (file);
>> + if (grub_errno != GRUB_ERR_NONE)
>> + {
>> + grub_linux_set_loaded (0);
>> + all_binaries_unload ();
>> + grub_dl_unref (my_mod);
>> + }
>> +
>> + return grub_errno;
>> +}
>> +
>> +static grub_command_t cmd_xen_hypervisor, cmd_xen_module;
>> +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."));
>> + cmd_xen_module =
>> + grub_register_command ("xen_module", grub_cmd_xen_module, 0,
>> + N_("Load a xen 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);
>> + grub_unregister_command (cmd_xen_module);
>> +}
>>
>
>
--
Best regards,
Fu Wei
Software Engineer
Red Hat Software (Beijing) Co.,Ltd.Shanghai Branch
Ph: +86 21 61221326(direct)
Ph: +86 186 2020 4684 (mobile)
Room 1512, Regus One Corporate Avenue,Level 15,
One Corporate Avenue,222 Hubin Road,Huangpu District,
Shanghai,China 200021