Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 | /* * Copyright (c) 2014 Oracle Co., Daniel Kiper * * This program 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 2 of the License, or * (at your option) any later version. * * This program 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 this program. If not, see <http://www.gnu.org/licenses/>. */ #include <linux/bitops.h> #include <linux/efi.h> #include <linux/init.h> #include <linux/string.h> #include <xen/xen.h> #include <xen/xen-ops.h> #include <xen/interface/platform.h> #include <asm/page.h> #include <asm/setup.h> #include <asm/xen/hypercall.h> static efi_char16_t vendor[100] __initdata; static efi_system_table_t efi_systab_xen __initdata = { .hdr = { .signature = EFI_SYSTEM_TABLE_SIGNATURE, .revision = 0, /* Initialized later. */ .headersize = 0, /* Ignored by Linux Kernel. */ .crc32 = 0, /* Ignored by Linux Kernel. */ .reserved = 0 }, .fw_vendor = EFI_INVALID_TABLE_ADDR, /* Initialized later. */ .fw_revision = 0, /* Initialized later. */ .con_in_handle = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */ .con_in = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */ .con_out_handle = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */ .con_out = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */ .stderr_handle = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */ .stderr = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */ .runtime = (efi_runtime_services_t *)EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */ .boottime = (efi_boot_services_t *)EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */ .nr_tables = 0, /* Initialized later. */ .tables = EFI_INVALID_TABLE_ADDR /* Initialized later. */ }; static efi_system_table_t __init *xen_efi_probe(void) { struct xen_platform_op op = { .cmd = XENPF_firmware_info, .u.firmware_info = { .type = XEN_FW_EFI_INFO, .index = XEN_FW_EFI_CONFIG_TABLE } }; union xenpf_efi_info *info = &op.u.firmware_info.u.efi_info; if (!xen_initial_domain() || HYPERVISOR_platform_op(&op) < 0) return NULL; /* Here we know that Xen runs on EFI platform. */ efi.get_time = xen_efi_get_time; efi.set_time = xen_efi_set_time; efi.get_wakeup_time = xen_efi_get_wakeup_time; efi.set_wakeup_time = xen_efi_set_wakeup_time; efi.get_variable = xen_efi_get_variable; efi.get_next_variable = xen_efi_get_next_variable; efi.set_variable = xen_efi_set_variable; efi.query_variable_info = xen_efi_query_variable_info; efi.update_capsule = xen_efi_update_capsule; efi.query_capsule_caps = xen_efi_query_capsule_caps; efi.get_next_high_mono_count = xen_efi_get_next_high_mono_count; efi.reset_system = xen_efi_reset_system; efi_systab_xen.tables = info->cfg.addr; efi_systab_xen.nr_tables = info->cfg.nent; op.cmd = XENPF_firmware_info; op.u.firmware_info.type = XEN_FW_EFI_INFO; op.u.firmware_info.index = XEN_FW_EFI_VENDOR; info->vendor.bufsz = sizeof(vendor); set_xen_guest_handle(info->vendor.name, vendor); if (HYPERVISOR_platform_op(&op) == 0) { efi_systab_xen.fw_vendor = __pa_symbol(vendor); efi_systab_xen.fw_revision = info->vendor.revision; } else efi_systab_xen.fw_vendor = __pa_symbol(L"UNKNOWN"); op.cmd = XENPF_firmware_info; op.u.firmware_info.type = XEN_FW_EFI_INFO; op.u.firmware_info.index = XEN_FW_EFI_VERSION; if (HYPERVISOR_platform_op(&op) == 0) efi_systab_xen.hdr.revision = info->version; op.cmd = XENPF_firmware_info; op.u.firmware_info.type = XEN_FW_EFI_INFO; op.u.firmware_info.index = XEN_FW_EFI_RT_VERSION; if (HYPERVISOR_platform_op(&op) == 0) efi.runtime_version = info->version; return &efi_systab_xen; } void __init xen_efi_init(void) { efi_system_table_t *efi_systab_xen; efi_systab_xen = xen_efi_probe(); if (efi_systab_xen == NULL) return; strncpy((char *)&boot_params.efi_info.efi_loader_signature, "Xen", sizeof(boot_params.efi_info.efi_loader_signature)); boot_params.efi_info.efi_systab = (__u32)__pa(efi_systab_xen); boot_params.efi_info.efi_systab_hi = (__u32)(__pa(efi_systab_xen) >> 32); set_bit(EFI_BOOT, &efi.flags); set_bit(EFI_PARAVIRT, &efi.flags); set_bit(EFI_64BIT, &efi.flags); } |