diff options
Diffstat (limited to 'arch/x86/boot/compressed')
| -rw-r--r-- | arch/x86/boot/compressed/acpi.c | 143 | ||||
| -rw-r--r-- | arch/x86/boot/compressed/eboot.c | 4 | ||||
| -rw-r--r-- | arch/x86/boot/compressed/head_64.S | 1 | ||||
| -rw-r--r-- | arch/x86/boot/compressed/mem_encrypt.S | 5 | ||||
| -rw-r--r-- | arch/x86/boot/compressed/misc.c | 11 | ||||
| -rw-r--r-- | arch/x86/boot/compressed/mkpiggy.c | 16 | ||||
| -rw-r--r-- | arch/x86/boot/compressed/string.c | 14 |
7 files changed, 129 insertions, 65 deletions
diff --git a/arch/x86/boot/compressed/acpi.c b/arch/x86/boot/compressed/acpi.c index ad84239e595e..15255f388a85 100644 --- a/arch/x86/boot/compressed/acpi.c +++ b/arch/x86/boot/compressed/acpi.c @@ -44,17 +44,109 @@ static acpi_physical_address get_acpi_rsdp(void) return addr; } -/* Search EFI system tables for RSDP. */ -static acpi_physical_address efi_get_rsdp_addr(void) +/* + * Search EFI system tables for RSDP. If both ACPI_20_TABLE_GUID and + * ACPI_TABLE_GUID are found, take the former, which has more features. + */ +static acpi_physical_address +__efi_get_rsdp_addr(unsigned long config_tables, unsigned int nr_tables, + bool efi_64) { acpi_physical_address rsdp_addr = 0; #ifdef CONFIG_EFI - unsigned long systab, systab_tables, config_tables; + int i; + + /* Get EFI tables from systab. */ + for (i = 0; i < nr_tables; i++) { + acpi_physical_address table; + efi_guid_t guid; + + if (efi_64) { + efi_config_table_64_t *tbl = (efi_config_table_64_t *)config_tables + i; + + guid = tbl->guid; + table = tbl->table; + + if (!IS_ENABLED(CONFIG_X86_64) && table >> 32) { + debug_putstr("Error getting RSDP address: EFI config table located above 4GB.\n"); + return 0; + } + } else { + efi_config_table_32_t *tbl = (efi_config_table_32_t *)config_tables + i; + + guid = tbl->guid; + table = tbl->table; + } + + if (!(efi_guidcmp(guid, ACPI_TABLE_GUID))) + rsdp_addr = table; + else if (!(efi_guidcmp(guid, ACPI_20_TABLE_GUID))) + return table; + } +#endif + return rsdp_addr; +} + +/* EFI/kexec support is 64-bit only. */ +#ifdef CONFIG_X86_64 +static struct efi_setup_data *get_kexec_setup_data_addr(void) +{ + struct setup_data *data; + u64 pa_data; + + pa_data = boot_params->hdr.setup_data; + while (pa_data) { + data = (struct setup_data *)pa_data; + if (data->type == SETUP_EFI) + return (struct efi_setup_data *)(pa_data + sizeof(struct setup_data)); + + pa_data = data->next; + } + return NULL; +} + +static acpi_physical_address kexec_get_rsdp_addr(void) +{ + efi_system_table_64_t *systab; + struct efi_setup_data *esd; + struct efi_info *ei; + char *sig; + + esd = (struct efi_setup_data *)get_kexec_setup_data_addr(); + if (!esd) + return 0; + + if (!esd->tables) { + debug_putstr("Wrong kexec SETUP_EFI data.\n"); + return 0; + } + + ei = &boot_params->efi_info; + sig = (char *)&ei->efi_loader_signature; + if (strncmp(sig, EFI64_LOADER_SIGNATURE, 4)) { + debug_putstr("Wrong kexec EFI loader signature.\n"); + return 0; + } + + /* Get systab from boot params. */ + systab = (efi_system_table_64_t *) (ei->efi_systab | ((__u64)ei->efi_systab_hi << 32)); + if (!systab) + error("EFI system table not found in kexec boot_params."); + + return __efi_get_rsdp_addr((unsigned long)esd->tables, systab->nr_tables, true); +} +#else +static acpi_physical_address kexec_get_rsdp_addr(void) { return 0; } +#endif /* CONFIG_X86_64 */ + +static acpi_physical_address efi_get_rsdp_addr(void) +{ +#ifdef CONFIG_EFI + unsigned long systab, config_tables; unsigned int nr_tables; struct efi_info *ei; bool efi_64; - int size, i; char *sig; ei = &boot_params->efi_info; @@ -88,49 +180,20 @@ static acpi_physical_address efi_get_rsdp_addr(void) config_tables = stbl->tables; nr_tables = stbl->nr_tables; - size = sizeof(efi_config_table_64_t); } else { efi_system_table_32_t *stbl = (efi_system_table_32_t *)systab; config_tables = stbl->tables; nr_tables = stbl->nr_tables; - size = sizeof(efi_config_table_32_t); } if (!config_tables) error("EFI config tables not found."); - /* Get EFI tables from systab. */ - for (i = 0; i < nr_tables; i++) { - acpi_physical_address table; - efi_guid_t guid; - - config_tables += size; - - if (efi_64) { - efi_config_table_64_t *tbl = (efi_config_table_64_t *)config_tables; - - guid = tbl->guid; - table = tbl->table; - - if (!IS_ENABLED(CONFIG_X86_64) && table >> 32) { - debug_putstr("Error getting RSDP address: EFI config table located above 4GB.\n"); - return 0; - } - } else { - efi_config_table_32_t *tbl = (efi_config_table_32_t *)config_tables; - - guid = tbl->guid; - table = tbl->table; - } - - if (!(efi_guidcmp(guid, ACPI_TABLE_GUID))) - rsdp_addr = table; - else if (!(efi_guidcmp(guid, ACPI_20_TABLE_GUID))) - return table; - } + return __efi_get_rsdp_addr(config_tables, nr_tables, efi_64); +#else + return 0; #endif - return rsdp_addr; } static u8 compute_checksum(u8 *buffer, u32 length) @@ -220,6 +283,14 @@ acpi_physical_address get_rsdp_addr(void) if (!pa) pa = boot_params->acpi_rsdp_addr; + /* + * Try to get EFI data from setup_data. This can happen when we're a + * kexec'ed kernel and kexec(1) has passed all the required EFI info to + * us. + */ + if (!pa) + pa = kexec_get_rsdp_addr(); + if (!pa) pa = efi_get_rsdp_addr(); diff --git a/arch/x86/boot/compressed/eboot.c b/arch/x86/boot/compressed/eboot.c index 544ac4fafd11..220d1279d0e2 100644 --- a/arch/x86/boot/compressed/eboot.c +++ b/arch/x86/boot/compressed/eboot.c @@ -1,11 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0-only /* ----------------------------------------------------------------------- * * Copyright 2011 Intel Corporation; author Matt Fleming * - * This file is part of the Linux kernel, and is made available under - * the terms of the GNU General Public License version 2. - * * ----------------------------------------------------------------------- */ #include <linux/efi.h> diff --git a/arch/x86/boot/compressed/head_64.S b/arch/x86/boot/compressed/head_64.S index fafb75c6c592..6233ae35d0d9 100644 --- a/arch/x86/boot/compressed/head_64.S +++ b/arch/x86/boot/compressed/head_64.S @@ -659,6 +659,7 @@ no_longmode: gdt64: .word gdt_end - gdt .quad 0 + .balign 8 gdt: .word gdt_end - gdt .long gdt diff --git a/arch/x86/boot/compressed/mem_encrypt.S b/arch/x86/boot/compressed/mem_encrypt.S index a480356e0ed8..6afb7130a387 100644 --- a/arch/x86/boot/compressed/mem_encrypt.S +++ b/arch/x86/boot/compressed/mem_encrypt.S @@ -1,13 +1,10 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ /* * AMD Memory Encryption Support * * Copyright (C) 2017 Advanced Micro Devices, Inc. * * Author: Tom Lendacky <thomas.lendacky@amd.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ #include <linux/linkage.h> diff --git a/arch/x86/boot/compressed/misc.c b/arch/x86/boot/compressed/misc.c index 5a237e8dbf8d..24e65a0f756d 100644 --- a/arch/x86/boot/compressed/misc.c +++ b/arch/x86/boot/compressed/misc.c @@ -351,9 +351,6 @@ asmlinkage __visible void *extract_kernel(void *rmode, memptr heap, /* Clear flags intended for solely in-kernel use. */ boot_params->hdr.loadflags &= ~KASLR_FLAG; - /* Save RSDP address for later use. */ - /* boot_params->acpi_rsdp_addr = get_rsdp_addr(); */ - sanitize_boot_params(boot_params); if (boot_params->screen_info.orig_video_mode == 7) { @@ -368,6 +365,14 @@ asmlinkage __visible void *extract_kernel(void *rmode, memptr heap, cols = boot_params->screen_info.orig_video_cols; console_init(); + + /* + * Save RSDP address for later use. Have this after console_init() + * so that early debugging output from the RSDP parsing code can be + * collected. + */ + boot_params->acpi_rsdp_addr = get_rsdp_addr(); + debug_putstr("early console in extract_kernel\n"); free_mem_ptr = heap; /* Heap */ diff --git a/arch/x86/boot/compressed/mkpiggy.c b/arch/x86/boot/compressed/mkpiggy.c index 72bad2c8debe..7e01248765b2 100644 --- a/arch/x86/boot/compressed/mkpiggy.c +++ b/arch/x86/boot/compressed/mkpiggy.c @@ -1,27 +1,13 @@ +// SPDX-License-Identifier: GPL-2.0-only /* ----------------------------------------------------------------------- * * * Copyright (C) 2009 Intel Corporation. All rights reserved. * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License version - * 2 as published by the Free Software Foundation. - * - * 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, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA. - * * H. Peter Anvin <hpa@linux.intel.com> * * ----------------------------------------------------------------------- * * Outputs a small assembly wrapper with the appropriate symbols defined. - * */ #include <stdlib.h> diff --git a/arch/x86/boot/compressed/string.c b/arch/x86/boot/compressed/string.c index 19dbbcdd1a53..81fc1eaa3229 100644 --- a/arch/x86/boot/compressed/string.c +++ b/arch/x86/boot/compressed/string.c @@ -11,7 +11,7 @@ #include "../string.c" #ifdef CONFIG_X86_32 -static void *__memcpy(void *dest, const void *src, size_t n) +static void *____memcpy(void *dest, const void *src, size_t n) { int d0, d1, d2; asm volatile( @@ -25,7 +25,7 @@ static void *__memcpy(void *dest, const void *src, size_t n) return dest; } #else -static void *__memcpy(void *dest, const void *src, size_t n) +static void *____memcpy(void *dest, const void *src, size_t n) { long d0, d1, d2; asm volatile( @@ -56,7 +56,7 @@ void *memmove(void *dest, const void *src, size_t n) const unsigned char *s = src; if (d <= s || d - s >= n) - return __memcpy(dest, src, n); + return ____memcpy(dest, src, n); while (n-- > 0) d[n] = s[n]; @@ -71,5 +71,11 @@ void *memcpy(void *dest, const void *src, size_t n) warn("Avoiding potentially unsafe overlapping memcpy()!"); return memmove(dest, src, n); } - return __memcpy(dest, src, n); + return ____memcpy(dest, src, n); } + +#ifdef CONFIG_KASAN +extern void *__memset(void *s, int c, size_t n) __alias(memset); +extern void *__memmove(void *dest, const void *src, size_t n) __alias(memmove); +extern void *__memcpy(void *dest, const void *src, size_t n) __alias(memcpy); +#endif |