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commit c8f5ed6ef972ed4fd10b0c2e2baec3b6803d3c73
parent 3717f613f48df0222311f974cf8a06c8a6c97bae
Author: Linus Torvalds <torvalds@linux-foundation.org>
Date:   Wed,  6 Mar 2019 07:13:56 -0800

Merge branch 'efi-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull EFI updates from Ingo Molnar:
 "The main EFI changes in this cycle were:

   - Use 32-bit alignment for efi_guid_t

   - Allow the SetVirtualAddressMap() call to be omitted

   - Implement earlycon=efifb based on existing earlyprintk code

   - Various minor fixes and code cleanups from Sai, Ard and me"

* 'efi-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  efi: Fix build error due to enum collision between efi.h and ima.h
  efi/x86: Convert x86 EFI earlyprintk into generic earlycon implementation
  x86: Make ARCH_USE_MEMREMAP_PROT a generic Kconfig symbol
  efi/arm/arm64: Allow SetVirtualAddressMap() to be omitted
  efi: Replace GPL license boilerplate with SPDX headers
  efi/fdt: Apply more cleanups
  efi: Use 32-bit alignment for efi_guid_t
  efi/memattr: Don't bail on zero VA if it equals the region's PA
  x86/efi: Mark can_free_region() as an __init function

Diffstat:
MDocumentation/admin-guide/kernel-parameters.txt | 8+++++++-
March/Kconfig | 3+++
March/x86/Kconfig | 5+----
March/x86/Kconfig.debug | 10----------
March/x86/include/asm/efi.h | 1-
March/x86/kernel/early_printk.c | 4----
March/x86/mm/ioremap.c | 4++--
March/x86/platform/efi/Makefile | 1-
Darch/x86/platform/efi/early_printk.c | 240-------------------------------------------------------------------------------
March/x86/platform/efi/quirks.c | 6+++---
Mdrivers/firmware/efi/Kconfig | 6++++++
Mdrivers/firmware/efi/Makefile | 1+
Mdrivers/firmware/efi/apple-properties.c | 13+------------
Mdrivers/firmware/efi/arm-init.c | 6+-----
Mdrivers/firmware/efi/arm-runtime.c | 6+-----
Mdrivers/firmware/efi/capsule-loader.c | 4+---
Mdrivers/firmware/efi/capsule.c | 4+---
Mdrivers/firmware/efi/cper-arm.c | 14+-------------
Mdrivers/firmware/efi/cper.c | 14+-------------
Mdrivers/firmware/efi/dev-path-parser.c | 9+--------
Adrivers/firmware/efi/earlycon.c | 206+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Mdrivers/firmware/efi/efi-bgrt.c | 5+----
Mdrivers/firmware/efi/efi-pstore.c | 2++
Mdrivers/firmware/efi/efibc.c | 10+---------
Mdrivers/firmware/efi/efivars.c | 58+---------------------------------------------------------
Mdrivers/firmware/efi/esrt.c | 1+
Mdrivers/firmware/efi/fake_mem.c | 16+---------------
Mdrivers/firmware/efi/libstub/Makefile | 4++--
Mdrivers/firmware/efi/libstub/arm-stub.c | 5+++++
Mdrivers/firmware/efi/libstub/arm32-stub.c | 6+-----
Mdrivers/firmware/efi/libstub/arm64-stub.c | 6+-----
Mdrivers/firmware/efi/libstub/efi-stub-helper.c | 15+++++++++++----
Mdrivers/firmware/efi/libstub/efistub.h | 12++++++++++++
Mdrivers/firmware/efi/libstub/fdt.c | 115++++++++++++++++++++++++++++++++++++++-----------------------------------------
Mdrivers/firmware/efi/libstub/gop.c | 4+---
Mdrivers/firmware/efi/libstub/random.c | 6+-----
Mdrivers/firmware/efi/libstub/secureboot.c | 4+---
Mdrivers/firmware/efi/libstub/tpm.c | 4+---
Mdrivers/firmware/efi/memattr.c | 7++-----
Mdrivers/firmware/efi/runtime-map.c | 3+--
Mdrivers/firmware/efi/runtime-wrappers.c | 48++++++++++++++++++++++++------------------------
Mdrivers/firmware/efi/test/efi_test.c | 1+
Mdrivers/firmware/efi/test/efi_test.h | 2+-
Mdrivers/firmware/efi/tpm.c | 5+----
Mdrivers/firmware/efi/vars.c | 15+--------------
Minclude/linux/efi.h | 41+++++++++++++++++++++++++++--------------
46 files changed, 393 insertions(+), 567 deletions(-)

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt @@ -1078,9 +1078,15 @@ specified address. The serial port must already be setup and configured. Options are not yet supported. + efifb,[options] + Start an early, unaccelerated console on the EFI + memory mapped framebuffer (if available). On cache + coherent non-x86 systems that use system memory for + the framebuffer, pass the 'ram' option so that it is + mapped with the correct attributes. + earlyprintk= [X86,SH,ARM,M68k,S390] earlyprintk=vga - earlyprintk=efi earlyprintk=sclp earlyprintk=xen earlyprintk=serial[,ttySn[,baudrate]] diff --git a/arch/Kconfig b/arch/Kconfig @@ -895,6 +895,9 @@ config HAVE_ARCH_PREL32_RELOCATIONS architectures, and don't require runtime relocation on relocatable kernels. +config ARCH_USE_MEMREMAP_PROT + bool + source "kernel/gcov/Kconfig" source "scripts/gcc-plugins/Kconfig" diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig @@ -1510,6 +1510,7 @@ config AMD_MEM_ENCRYPT bool "AMD Secure Memory Encryption (SME) support" depends on X86_64 && CPU_SUP_AMD select DYNAMIC_PHYSICAL_MASK + select ARCH_USE_MEMREMAP_PROT ---help--- Say yes to enable support for the encryption of system memory. This requires an AMD processor that supports Secure Memory @@ -1529,10 +1530,6 @@ config AMD_MEM_ENCRYPT_ACTIVE_BY_DEFAULT If set to N, then the encryption of system memory can be activated with the mem_encrypt=on command line option. -config ARCH_USE_MEMREMAP_PROT - def_bool y - depends on AMD_MEM_ENCRYPT - # Common NUMA Features config NUMA bool "Numa Memory Allocation and Scheduler Support" diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug @@ -40,16 +40,6 @@ config EARLY_PRINTK_DBGP with klogd/syslogd or the X server. You should normally say N here, unless you want to debug such a crash. You need usb debug device. -config EARLY_PRINTK_EFI - bool "Early printk via the EFI framebuffer" - depends on EFI && EARLY_PRINTK - select FONT_SUPPORT - ---help--- - Write kernel log output directly into the EFI framebuffer. - - This is useful for kernel debugging when your machine crashes very - early before the console code is initialized. - config EARLY_PRINTK_USB_XDBC bool "Early printk via the xHCI debug port" depends on EARLY_PRINTK && PCI diff --git a/arch/x86/include/asm/efi.h b/arch/x86/include/asm/efi.h @@ -170,7 +170,6 @@ static inline bool efi_runtime_supported(void) return false; } -extern struct console early_efi_console; extern void parse_efi_setup(u64 phys_addr, u32 data_len); extern void efifb_setup_from_dmi(struct screen_info *si, const char *opt); diff --git a/arch/x86/kernel/early_printk.c b/arch/x86/kernel/early_printk.c @@ -388,10 +388,6 @@ static int __init setup_early_printk(char *buf) if (!strncmp(buf, "xen", 3)) early_console_register(&xenboot_console, keep); #endif -#ifdef CONFIG_EARLY_PRINTK_EFI - if (!strncmp(buf, "efi", 3)) - early_console_register(&early_efi_console, keep); -#endif #ifdef CONFIG_EARLY_PRINTK_USB_XDBC if (!strncmp(buf, "xdbc", 4)) early_xdbc_parse_parameter(buf + 4); diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c @@ -705,7 +705,7 @@ bool phys_mem_access_encrypted(unsigned long phys_addr, unsigned long size) return arch_memremap_can_ram_remap(phys_addr, size, 0); } -#ifdef CONFIG_ARCH_USE_MEMREMAP_PROT +#ifdef CONFIG_AMD_MEM_ENCRYPT /* Remap memory with encryption */ void __init *early_memremap_encrypted(resource_size_t phys_addr, unsigned long size) @@ -747,7 +747,7 @@ void __init *early_memremap_decrypted_wp(resource_size_t phys_addr, return early_memremap_prot(phys_addr, size, __PAGE_KERNEL_NOENC_WP); } -#endif /* CONFIG_ARCH_USE_MEMREMAP_PROT */ +#endif /* CONFIG_AMD_MEM_ENCRYPT */ static pte_t bm_pte[PAGE_SIZE/sizeof(pte_t)] __page_aligned_bss; diff --git a/arch/x86/platform/efi/Makefile b/arch/x86/platform/efi/Makefile @@ -3,5 +3,4 @@ OBJECT_FILES_NON_STANDARD_efi_thunk_$(BITS).o := y OBJECT_FILES_NON_STANDARD_efi_stub_$(BITS).o := y obj-$(CONFIG_EFI) += quirks.o efi.o efi_$(BITS).o efi_stub_$(BITS).o -obj-$(CONFIG_EARLY_PRINTK_EFI) += early_printk.o obj-$(CONFIG_EFI_MIXED) += efi_thunk_$(BITS).o diff --git a/arch/x86/platform/efi/early_printk.c b/arch/x86/platform/efi/early_printk.c @@ -1,240 +0,0 @@ -/* - * Copyright (C) 2013 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/console.h> -#include <linux/efi.h> -#include <linux/font.h> -#include <linux/io.h> -#include <linux/kernel.h> -#include <asm/setup.h> - -static const struct font_desc *font; -static u32 efi_x, efi_y; -static void *efi_fb; -static bool early_efi_keep; - -/* - * efi earlyprintk need use early_ioremap to map the framebuffer. - * But early_ioremap is not usable for earlyprintk=efi,keep, ioremap should - * be used instead. ioremap will be available after paging_init() which is - * earlier than initcall callbacks. Thus adding this early initcall function - * early_efi_map_fb to map the whole efi framebuffer. - */ -static __init int early_efi_map_fb(void) -{ - u64 base, size; - - if (!early_efi_keep) - return 0; - - base = boot_params.screen_info.lfb_base; - if (boot_params.screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE) - base |= (u64)boot_params.screen_info.ext_lfb_base << 32; - size = boot_params.screen_info.lfb_size; - efi_fb = ioremap(base, size); - - return efi_fb ? 0 : -ENOMEM; -} -early_initcall(early_efi_map_fb); - -/* - * early_efi_map maps efi framebuffer region [start, start + len -1] - * In case earlyprintk=efi,keep we have the whole framebuffer mapped already - * so just return the offset efi_fb + start. - */ -static __ref void *early_efi_map(unsigned long start, unsigned long len) -{ - u64 base; - - base = boot_params.screen_info.lfb_base; - if (boot_params.screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE) - base |= (u64)boot_params.screen_info.ext_lfb_base << 32; - - if (efi_fb) - return (efi_fb + start); - else - return early_ioremap(base + start, len); -} - -static __ref void early_efi_unmap(void *addr, unsigned long len) -{ - if (!efi_fb) - early_iounmap(addr, len); -} - -static void early_efi_clear_scanline(unsigned int y) -{ - unsigned long *dst; - u16 len; - - len = boot_params.screen_info.lfb_linelength; - dst = early_efi_map(y*len, len); - if (!dst) - return; - - memset(dst, 0, len); - early_efi_unmap(dst, len); -} - -static void early_efi_scroll_up(void) -{ - unsigned long *dst, *src; - u16 len; - u32 i, height; - - len = boot_params.screen_info.lfb_linelength; - height = boot_params.screen_info.lfb_height; - - for (i = 0; i < height - font->height; i++) { - dst = early_efi_map(i*len, len); - if (!dst) - return; - - src = early_efi_map((i + font->height) * len, len); - if (!src) { - early_efi_unmap(dst, len); - return; - } - - memmove(dst, src, len); - - early_efi_unmap(src, len); - early_efi_unmap(dst, len); - } -} - -static void early_efi_write_char(u32 *dst, unsigned char c, unsigned int h) -{ - const u32 color_black = 0x00000000; - const u32 color_white = 0x00ffffff; - const u8 *src; - u8 s8; - int m; - - src = font->data + c * font->height; - s8 = *(src + h); - - for (m = 0; m < 8; m++) { - if ((s8 >> (7 - m)) & 1) - *dst = color_white; - else - *dst = color_black; - dst++; - } -} - -static void -early_efi_write(struct console *con, const char *str, unsigned int num) -{ - struct screen_info *si; - unsigned int len; - const char *s; - void *dst; - - si = &boot_params.screen_info; - len = si->lfb_linelength; - - while (num) { - unsigned int linemax; - unsigned int h, count = 0; - - for (s = str; *s && *s != '\n'; s++) { - if (count == num) - break; - count++; - } - - linemax = (si->lfb_width - efi_x) / font->width; - if (count > linemax) - count = linemax; - - for (h = 0; h < font->height; h++) { - unsigned int n, x; - - dst = early_efi_map((efi_y + h) * len, len); - if (!dst) - return; - - s = str; - n = count; - x = efi_x; - - while (n-- > 0) { - early_efi_write_char(dst + x*4, *s, h); - x += font->width; - s++; - } - - early_efi_unmap(dst, len); - } - - num -= count; - efi_x += count * font->width; - str += count; - - if (num > 0 && *s == '\n') { - efi_x = 0; - efi_y += font->height; - str++; - num--; - } - - if (efi_x + font->width > si->lfb_width) { - efi_x = 0; - efi_y += font->height; - } - - if (efi_y + font->height > si->lfb_height) { - u32 i; - - efi_y -= font->height; - early_efi_scroll_up(); - - for (i = 0; i < font->height; i++) - early_efi_clear_scanline(efi_y + i); - } - } -} - -static __init int early_efi_setup(struct console *con, char *options) -{ - struct screen_info *si; - u16 xres, yres; - u32 i; - - si = &boot_params.screen_info; - xres = si->lfb_width; - yres = si->lfb_height; - - /* - * early_efi_write_char() implicitly assumes a framebuffer with - * 32-bits per pixel. - */ - if (si->lfb_depth != 32) - return -ENODEV; - - font = get_default_font(xres, yres, -1, -1); - if (!font) - return -ENODEV; - - efi_y = rounddown(yres, font->height) - font->height; - for (i = 0; i < (yres - efi_y) / font->height; i++) - early_efi_scroll_up(); - - /* early_console_register will unset CON_BOOT in case ,keep */ - if (!(con->flags & CON_BOOT)) - early_efi_keep = true; - return 0; -} - -struct console early_efi_console = { - .name = "earlyefi", - .write = early_efi_write, - .setup = early_efi_setup, - .flags = CON_PRINTBUFFER, - .index = -1, -}; diff --git a/arch/x86/platform/efi/quirks.c b/arch/x86/platform/efi/quirks.c @@ -304,7 +304,7 @@ void __init efi_arch_mem_reserve(phys_addr_t addr, u64 size) * - Not within any part of the kernel * - Not the BIOS reserved area (E820_TYPE_RESERVED, E820_TYPE_NVS, etc) */ -static bool can_free_region(u64 start, u64 size) +static __init bool can_free_region(u64 start, u64 size) { if (start + size > __pa_symbol(_text) && start <= __pa_symbol(_end)) return false; @@ -717,7 +717,7 @@ void efi_recover_from_page_fault(unsigned long phys_addr) * "efi_mm" cannot be used to check if the page fault had occurred * in the firmware context because efi=old_map doesn't use efi_pgd. */ - if (efi_rts_work.efi_rts_id == NONE) + if (efi_rts_work.efi_rts_id == EFI_NONE) return; /* @@ -742,7 +742,7 @@ void efi_recover_from_page_fault(unsigned long phys_addr) * because this case occurs *very* rarely and hence could be improved * on a need by basis. */ - if (efi_rts_work.efi_rts_id == RESET_SYSTEM) { + if (efi_rts_work.efi_rts_id == EFI_RESET_SYSTEM) { pr_info("efi_reset_system() buggy! Reboot through BIOS\n"); machine_real_restart(MRR_BIOS); return; diff --git a/drivers/firmware/efi/Kconfig b/drivers/firmware/efi/Kconfig @@ -198,3 +198,9 @@ config EFI_DEV_PATH_PARSER bool depends on ACPI default n + +config EFI_EARLYCON + def_bool y + depends on SERIAL_EARLYCON && !ARM && !IA64 + select FONT_SUPPORT + select ARCH_USE_MEMREMAP_PROT diff --git a/drivers/firmware/efi/Makefile b/drivers/firmware/efi/Makefile @@ -30,5 +30,6 @@ arm-obj-$(CONFIG_EFI) := arm-init.o arm-runtime.o obj-$(CONFIG_ARM) += $(arm-obj-y) obj-$(CONFIG_ARM64) += $(arm-obj-y) obj-$(CONFIG_EFI_CAPSULE_LOADER) += capsule-loader.o +obj-$(CONFIG_EFI_EARLYCON) += earlycon.o obj-$(CONFIG_UEFI_CPER_ARM) += cper-arm.o obj-$(CONFIG_UEFI_CPER_X86) += cper-x86.o diff --git a/drivers/firmware/efi/apple-properties.c b/drivers/firmware/efi/apple-properties.c @@ -1,19 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0 /* * apple-properties.c - EFI device properties on Macs * Copyright (C) 2016 Lukas Wunner <lukas@wunner.de> * - * 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, see <http://www.gnu.org/licenses/>. - * * Note, all properties are considered as u8 arrays. * To get a value of any of them the caller must use device_property_read_u8_array(). */ diff --git a/drivers/firmware/efi/arm-init.c b/drivers/firmware/efi/arm-init.c @@ -1,14 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0 /* * Extensible Firmware Interface * * Based on Extensible Firmware Interface Specification version 2.4 * * Copyright (C) 2013 - 2015 Linaro Ltd. - * - * 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. - * */ #define pr_fmt(fmt) "efi: " fmt diff --git a/drivers/firmware/efi/arm-runtime.c b/drivers/firmware/efi/arm-runtime.c @@ -1,14 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0 /* * Extensible Firmware Interface * * Based on Extensible Firmware Interface Specification version 2.4 * * Copyright (C) 2013, 2014 Linaro Ltd. - * - * 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/dmi.h> diff --git a/drivers/firmware/efi/capsule-loader.c b/drivers/firmware/efi/capsule-loader.c @@ -1,10 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0 /* * EFI capsule loader driver. * * Copyright 2015 Intel Corporation - * - * This file is part of the Linux kernel, and is made available under - * the terms of the GNU General Public License version 2. */ #define pr_fmt(fmt) "efi: " fmt diff --git a/drivers/firmware/efi/capsule.c b/drivers/firmware/efi/capsule.c @@ -1,10 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0 /* * EFI capsule support. * * Copyright 2013 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. */ #define pr_fmt(fmt) "efi: " fmt diff --git a/drivers/firmware/efi/cper-arm.c b/drivers/firmware/efi/cper-arm.c @@ -1,20 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0 /* * UEFI Common Platform Error Record (CPER) support * * Copyright (C) 2017, The Linux Foundation. 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include <linux/kernel.h> diff --git a/drivers/firmware/efi/cper.c b/drivers/firmware/efi/cper.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0 /* * UEFI Common Platform Error Record (CPER) support * @@ -9,19 +10,6 @@ * * For more information about CPER, please refer to Appendix N of UEFI * Specification version 2.4. - * - * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include <linux/kernel.h> diff --git a/drivers/firmware/efi/dev-path-parser.c b/drivers/firmware/efi/dev-path-parser.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0 /* * dev-path-parser.c - EFI Device Path parser * Copyright (C) 2016 Lukas Wunner <lukas@wunner.de> @@ -5,14 +6,6 @@ * 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, see <http://www.gnu.org/licenses/>. */ #include <linux/acpi.h> diff --git a/drivers/firmware/efi/earlycon.c b/drivers/firmware/efi/earlycon.c @@ -0,0 +1,206 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2013 Intel Corporation; author Matt Fleming + */ + +#include <linux/console.h> +#include <linux/efi.h> +#include <linux/font.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/serial_core.h> +#include <linux/screen_info.h> + +#include <asm/early_ioremap.h> + +static const struct font_desc *font; +static u32 efi_x, efi_y; +static u64 fb_base; +static pgprot_t fb_prot; + +static __ref void *efi_earlycon_map(unsigned long start, unsigned long len) +{ + return early_memremap_prot(fb_base + start, len, pgprot_val(fb_prot)); +} + +static __ref void efi_earlycon_unmap(void *addr, unsigned long len) +{ + early_memunmap(addr, len); +} + +static void efi_earlycon_clear_scanline(unsigned int y) +{ + unsigned long *dst; + u16 len; + + len = screen_info.lfb_linelength; + dst = efi_earlycon_map(y*len, len); + if (!dst) + return; + + memset(dst, 0, len); + efi_earlycon_unmap(dst, len); +} + +static void efi_earlycon_scroll_up(void) +{ + unsigned long *dst, *src; + u16 len; + u32 i, height; + + len = screen_info.lfb_linelength; + height = screen_info.lfb_height; + + for (i = 0; i < height - font->height; i++) { + dst = efi_earlycon_map(i*len, len); + if (!dst) + return; + + src = efi_earlycon_map((i + font->height) * len, len); + if (!src) { + efi_earlycon_unmap(dst, len); + return; + } + + memmove(dst, src, len); + + efi_earlycon_unmap(src, len); + efi_earlycon_unmap(dst, len); + } +} + +static void efi_earlycon_write_char(u32 *dst, unsigned char c, unsigned int h) +{ + const u32 color_black = 0x00000000; + const u32 color_white = 0x00ffffff; + const u8 *src; + u8 s8; + int m; + + src = font->data + c * font->height; + s8 = *(src + h); + + for (m = 0; m < 8; m++) { + if ((s8 >> (7 - m)) & 1) + *dst = color_white; + else + *dst = color_black; + dst++; + } +} + +static void +efi_earlycon_write(struct console *con, const char *str, unsigned int num) +{ + struct screen_info *si; + unsigned int len; + const char *s; + void *dst; + + si = &screen_info; + len = si->lfb_linelength; + + while (num) { + unsigned int linemax; + unsigned int h, count = 0; + + for (s = str; *s && *s != '\n'; s++) { + if (count == num) + break; + count++; + } + + linemax = (si->lfb_width - efi_x) / font->width; + if (count > linemax) + count = linemax; + + for (h = 0; h < font->height; h++) { + unsigned int n, x; + + dst = efi_earlycon_map((efi_y + h) * len, len); + if (!dst) + return; + + s = str; + n = count; + x = efi_x; + + while (n-- > 0) { + efi_earlycon_write_char(dst + x*4, *s, h); + x += font->width; + s++; + } + + efi_earlycon_unmap(dst, len); + } + + num -= count; + efi_x += count * font->width; + str += count; + + if (num > 0 && *s == '\n') { + efi_x = 0; + efi_y += font->height; + str++; + num--; + } + + if (efi_x + font->width > si->lfb_width) { + efi_x = 0; + efi_y += font->height; + } + + if (efi_y + font->height > si->lfb_height) { + u32 i; + + efi_y -= font->height; + efi_earlycon_scroll_up(); + + for (i = 0; i < font->height; i++) + efi_earlycon_clear_scanline(efi_y + i); + } + } +} + +static int __init efi_earlycon_setup(struct earlycon_device *device, + const char *opt) +{ + struct screen_info *si; + u16 xres, yres; + u32 i; + + if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI) + return -ENODEV; + + fb_base = screen_info.lfb_base; + if (screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE) + fb_base |= (u64)screen_info.ext_lfb_base << 32; + + if (opt && !strcmp(opt, "ram")) + fb_prot = PAGE_KERNEL; + else + fb_prot = pgprot_writecombine(PAGE_KERNEL); + + si = &screen_info; + xres = si->lfb_width; + yres = si->lfb_height; + + /* + * efi_earlycon_write_char() implicitly assumes a framebuffer with + * 32 bits per pixel. + */ + if (si->lfb_depth != 32) + return -ENODEV; + + font = get_default_font(xres, yres, -1, -1); + if (!font) + return -ENODEV; + + efi_y = rounddown(yres, font->height) - font->height; + for (i = 0; i < (yres - efi_y) / font->height; i++) + efi_earlycon_scroll_up(); + + device->con->write = efi_earlycon_write; + return 0; +} +EARLYCON_DECLARE(efifb, efi_earlycon_setup); diff --git a/drivers/firmware/efi/efi-bgrt.c b/drivers/firmware/efi/efi-bgrt.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0 /* * Copyright 2012 Intel Corporation * Author: Josh Triplett <josh@joshtriplett.org> @@ -5,10 +6,6 @@ * Based on the bgrt driver: * Copyright 2012 Red Hat, Inc <mjg@redhat.com> * Author: Matthew Garrett - * - * 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. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt diff --git a/drivers/firmware/efi/efi-pstore.c b/drivers/firmware/efi/efi-pstore.c @@ -1,3 +1,5 @@ +// SPDX-License-Identifier: GPL-2.0+ + #include <linux/efi.h> #include <linux/module.h> #include <linux/pstore.h> diff --git a/drivers/firmware/efi/efibc.c b/drivers/firmware/efi/efibc.c @@ -1,15 +1,7 @@ +// SPDX-License-Identifier: GPL-2.0 /* * efibc: control EFI bootloaders which obey LoaderEntryOneShot var * Copyright (c) 2013-2016, Intel Corporation. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. - * - * This program is distributed in the hope 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. */ #define pr_fmt(fmt) "efibc: " fmt diff --git a/drivers/firmware/efi/efivars.c b/drivers/firmware/efi/efivars.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * Originally from efivars.c, * @@ -6,63 +7,6 @@ * * This code takes all variables accessible from EFI runtime and * exports them via sysfs - * - * 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, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * - * Changelog: - * - * 17 May 2004 - Matt Domsch <Matt_Domsch@dell.com> - * remove check for efi_enabled in exit - * add MODULE_VERSION - * - * 26 Apr 2004 - Matt Domsch <Matt_Domsch@dell.com> - * minor bug fixes - * - * 21 Apr 2004 - Matt Tolentino <matthew.e.tolentino@intel.com) - * converted driver to export variable information via sysfs - * and moved to drivers/firmware directory - * bumped revision number to v0.07 to reflect conversion & move - * - * 10 Dec 2002 - Matt Domsch <Matt_Domsch@dell.com> - * fix locking per Peter Chubb's findings - * - * 25 Mar 2002 - Matt Domsch <Matt_Domsch@dell.com> - * move uuid_unparse() to include/asm-ia64/efi.h:efi_guid_to_str() - * - * 12 Feb 2002 - Matt Domsch <Matt_Domsch@dell.com> - * use list_for_each_safe when deleting vars. - * remove ifdef CONFIG_SMP around include <linux/smp.h> - * v0.04 release to linux-ia64@linuxia64.org - * - * 20 April 2001 - Matt Domsch <Matt_Domsch@dell.com> - * Moved vars from /proc/efi to /proc/efi/vars, and made - * efi.c own the /proc/efi directory. - * v0.03 release to linux-ia64@linuxia64.org - * - * 26 March 2001 - Matt Domsch <Matt_Domsch@dell.com> - * At the request of Stephane, moved ownership of /proc/efi - * to efi.c, and now efivars lives under /proc/efi/vars. - * - * 12 March 2001 - Matt Domsch <Matt_Domsch@dell.com> - * Feedback received from Stephane Eranian incorporated. - * efivar_write() checks copy_from_user() return value. - * efivar_read/write() returns proper errno. - * v0.02 release to linux-ia64@linuxia64.org - * - * 26 February 2001 - Matt Domsch <Matt_Domsch@dell.com> - * v0.01 release to linux-ia64@linuxia64.org */ #include <linux/efi.h> diff --git a/drivers/firmware/efi/esrt.c b/drivers/firmware/efi/esrt.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * esrt.c * diff --git a/drivers/firmware/efi/fake_mem.c b/drivers/firmware/efi/fake_mem.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0 /* * fake_mem.c * @@ -8,21 +9,6 @@ * By specifying this parameter, you can add arbitrary attribute to * specific memory range by updating original (firmware provided) EFI * memmap. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. - * - * This program is distributed in the hope 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/>. - * - * The full GNU General Public License is included in this distribution in - * the file called "COPYING". */ #include <linux/kernel.h> diff --git a/drivers/firmware/efi/libstub/Makefile b/drivers/firmware/efi/libstub/Makefile @@ -52,7 +52,7 @@ lib-$(CONFIG_EFI_ARMSTUB) += arm-stub.o fdt.o string.o random.o \ lib-$(CONFIG_ARM) += arm32-stub.o lib-$(CONFIG_ARM64) += arm64-stub.o -CFLAGS_arm64-stub.o := -DTEXT_OFFSET=$(TEXT_OFFSET) +CFLAGS_arm64-stub.o := -DTEXT_OFFSET=$(TEXT_OFFSET) # # arm64 puts the stub in the kernel proper, which will unnecessarily retain all @@ -89,7 +89,7 @@ quiet_cmd_stubcopy = STUBCPY $@ cmd_stubcopy = if $(STRIP) --strip-debug $(STUBCOPY_RM-y) -o $@ $<; \ then if $(OBJDUMP) -r $@ | grep $(STUBCOPY_RELOC-y); \ then (echo >&2 "$@: absolute symbol references not allowed in the EFI stub"; \ - rm -f $@; /bin/false); \ + rm -f $@; /bin/false); \ else $(OBJCOPY) $(STUBCOPY_FLAGS-y) $< $@; fi \ else /bin/false; fi diff --git a/drivers/firmware/efi/libstub/arm-stub.c b/drivers/firmware/efi/libstub/arm-stub.c @@ -367,6 +367,11 @@ void efi_get_virtmap(efi_memory_desc_t *memory_map, unsigned long map_size, paddr = in->phys_addr; size = in->num_pages * EFI_PAGE_SIZE; + if (novamap()) { + in->virt_addr = in->phys_addr; + continue; + } + /* * Make the mapping compatible with 64k pages: this allows * a 4k page size kernel to kexec a 64k page size kernel and diff --git a/drivers/firmware/efi/libstub/arm32-stub.c b/drivers/firmware/efi/libstub/arm32-stub.c @@ -1,10 +1,6 @@ +// SPDX-License-Identifier: GPL-2.0 /* * Copyright (C) 2013 Linaro Ltd; <roy.franz@linaro.org> - * - * 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/efi.h> #include <asm/efi.h> diff --git a/drivers/firmware/efi/libstub/arm64-stub.c b/drivers/firmware/efi/libstub/arm64-stub.c @@ -1,13 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0 /* * Copyright (C) 2013, 2014 Linaro Ltd; <roy.franz@linaro.org> * * This file implements the EFI boot stub for the arm64 kernel. * Adapted from ARM version by Mark Salter <msalter@redhat.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. - * */ /* diff --git a/drivers/firmware/efi/libstub/efi-stub-helper.c b/drivers/firmware/efi/libstub/efi-stub-helper.c @@ -1,13 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0 /* * Helper functions used by the EFI stub on multiple * architectures. This should be #included by the EFI stub * implementation files. * * 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> @@ -34,6 +31,7 @@ static unsigned long __chunk_size = EFI_READ_CHUNK_SIZE; static int __section(.data) __nokaslr; static int __section(.data) __quiet; +static int __section(.data) __novamap; int __pure nokaslr(void) { @@ -43,6 +41,10 @@ int __pure is_quiet(void) { return __quiet; } +int __pure novamap(void) +{ + return __novamap; +} #define EFI_MMAP_NR_SLACK_SLOTS 8 @@ -482,6 +484,11 @@ efi_status_t efi_parse_options(char const *cmdline) __chunk_size = -1UL; } + if (!strncmp(str, "novamap", 7)) { + str += strlen("novamap"); + __novamap = 1; + } + /* Group words together, delimited by "," */ while (*str && *str != ' ' && *str != ',') str++; diff --git a/drivers/firmware/efi/libstub/efistub.h b/drivers/firmware/efi/libstub/efistub.h @@ -27,6 +27,7 @@ extern int __pure nokaslr(void); extern int __pure is_quiet(void); +extern int __pure novamap(void); #define pr_efi(sys_table, msg) do { \ if (!is_quiet()) efi_printk(sys_table, "EFI stub: "msg); \ @@ -64,4 +65,15 @@ efi_status_t check_platform_features(efi_system_table_t *sys_table_arg); efi_status_t efi_random_get_seed(efi_system_table_t *sys_table_arg); +/* Helper macros for the usual case of using simple C variables: */ +#ifndef fdt_setprop_inplace_var +#define fdt_setprop_inplace_var(fdt, node_offset, name, var) \ + fdt_setprop_inplace((fdt), (node_offset), (name), &(var), sizeof(var)) +#endif + +#ifndef fdt_setprop_var +#define fdt_setprop_var(fdt, node_offset, name, var) \ + fdt_setprop((fdt), (node_offset), (name), &(var), sizeof(var)) +#endif + #endif diff --git a/drivers/firmware/efi/libstub/fdt.c b/drivers/firmware/efi/libstub/fdt.c @@ -1,13 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0 /* * FDT related Helper functions used by the EFI stub on multiple * architectures. This should be #included by the EFI stub * implementation files. * * Copyright 2013 Linaro Limited; author Roy Franz - * - * 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> @@ -26,10 +23,8 @@ static void fdt_update_cell_size(efi_system_table_t *sys_table, void *fdt) offset = fdt_path_offset(fdt, "/"); /* Set the #address-cells and #size-cells values for an empty tree */ - fdt_setprop_u32(fdt, offset, "#address-cells", - EFI_DT_ADDR_CELLS_DEFAULT); - - fdt_setprop_u32(fdt, offset, "#size-cells", EFI_DT_SIZE_CELLS_DEFAULT); + fdt_setprop_u32(fdt, offset, "#address-cells", EFI_DT_ADDR_CELLS_DEFAULT); + fdt_setprop_u32(fdt, offset, "#size-cells", EFI_DT_SIZE_CELLS_DEFAULT); } static efi_status_t update_fdt(efi_system_table_t *sys_table, void *orig_fdt, @@ -42,7 +37,7 @@ static efi_status_t update_fdt(efi_system_table_t *sys_table, void *orig_fdt, u32 fdt_val32; u64 fdt_val64; - /* Do some checks on provided FDT, if it exists*/ + /* Do some checks on provided FDT, if it exists: */ if (orig_fdt) { if (fdt_check_header(orig_fdt)) { pr_efi_err(sys_table, "Device Tree header not valid!\n"); @@ -50,7 +45,7 @@ static efi_status_t update_fdt(efi_system_table_t *sys_table, void *orig_fdt, } /* * We don't get the size of the FDT if we get if from a - * configuration table. + * configuration table: */ if (orig_fdt_size && fdt_totalsize(orig_fdt) > orig_fdt_size) { pr_efi_err(sys_table, "Truncated device tree! foo!\n"); @@ -64,8 +59,8 @@ static efi_status_t update_fdt(efi_system_table_t *sys_table, void *orig_fdt, status = fdt_create_empty_tree(fdt, new_fdt_size); if (status == 0) { /* - * Any failure from the following function is non - * critical + * Any failure from the following function is + * non-critical: */ fdt_update_cell_size(sys_table, fdt); } @@ -86,12 +81,13 @@ static efi_status_t update_fdt(efi_system_table_t *sys_table, void *orig_fdt, if (node < 0) { node = fdt_add_subnode(fdt, 0, "chosen"); if (node < 0) { - status = node; /* node is error code when negative */ + /* 'node' is an error code when negative: */ + status = node; goto fdt_set_fail; } } - if ((cmdline_ptr != NULL) && (strlen(cmdline_ptr) > 0)) { + if (cmdline_ptr != NULL && strlen(cmdline_ptr) > 0) { status = fdt_setprop(fdt, node, "bootargs", cmdline_ptr, strlen(cmdline_ptr) + 1); if (status) @@ -103,13 +99,12 @@ static efi_status_t update_fdt(efi_system_table_t *sys_table, void *orig_fdt, u64 initrd_image_end; u64 initrd_image_start = cpu_to_fdt64(initrd_addr); - status = fdt_setprop(fdt, node, "linux,initrd-start", - &initrd_image_start, sizeof(u64)); + status = fdt_setprop_var(fdt, node, "linux,initrd-start", initrd_image_start); if (status) goto fdt_set_fail; + initrd_image_end = cpu_to_fdt64(initrd_addr + initrd_size); - status = fdt_setprop(fdt, node, "linux,initrd-end", - &initrd_image_end, sizeof(u64)); + status = fdt_setprop_var(fdt, node, "linux,initrd-end", initrd_image_end); if (status) goto fdt_set_fail; } @@ -117,30 +112,28 @@ static efi_status_t update_fdt(efi_system_table_t *sys_table, void *orig_fdt, /* Add FDT entries for EFI runtime services in chosen node. */ node = fdt_subnode_offset(fdt, 0, "chosen"); fdt_val64 = cpu_to_fdt64((u64)(unsigned long)sys_table); - status = fdt_setprop(fdt, node, "linux,uefi-system-table", - &fdt_val64, sizeof(fdt_val64)); + + status = fdt_setprop_var(fdt, node, "linux,uefi-system-table", fdt_val64); if (status) goto fdt_set_fail; fdt_val64 = U64_MAX; /* placeholder */ - status = fdt_setprop(fdt, node, "linux,uefi-mmap-start", - &fdt_val64, sizeof(fdt_val64)); + + status = fdt_setprop_var(fdt, node, "linux,uefi-mmap-start", fdt_val64); if (status) goto fdt_set_fail; fdt_val32 = U32_MAX; /* placeholder */ - status = fdt_setprop(fdt, node, "linux,uefi-mmap-size", - &fdt_val32, sizeof(fdt_val32)); + + status = fdt_setprop_var(fdt, node, "linux,uefi-mmap-size", fdt_val32); if (status) goto fdt_set_fail; - status = fdt_setprop(fdt, node, "linux,uefi-mmap-desc-size", - &fdt_val32, sizeof(fdt_val32)); + status = fdt_setprop_var(fdt, node, "linux,uefi-mmap-desc-size", fdt_val32); if (status) goto fdt_set_fail; - status = fdt_setprop(fdt, node, "linux,uefi-mmap-desc-ver", - &fdt_val32, sizeof(fdt_val32)); + status = fdt_setprop_var(fdt, node, "linux,uefi-mmap-desc-ver", fdt_val32); if (status) goto fdt_set_fail; @@ -150,8 +143,7 @@ static efi_status_t update_fdt(efi_system_table_t *sys_table, void *orig_fdt, efi_status = efi_get_random_bytes(sys_table, sizeof(fdt_val64), (u8 *)&fdt_val64); if (efi_status == EFI_SUCCESS) { - status = fdt_setprop(fdt, node, "kaslr-seed", - &fdt_val64, sizeof(fdt_val64)); + status = fdt_setprop_var(fdt, node, "kaslr-seed", fdt_val64); if (status) goto fdt_set_fail; } else if (efi_status != EFI_NOT_FOUND) { @@ -159,7 +151,7 @@ static efi_status_t update_fdt(efi_system_table_t *sys_table, void *orig_fdt, } } - /* shrink the FDT back to its minimum size */ + /* Shrink the FDT back to its minimum size: */ fdt_pack(fdt); return EFI_SUCCESS; @@ -182,26 +174,26 @@ static efi_status_t update_fdt_memmap(void *fdt, struct efi_boot_memmap *map) return EFI_LOAD_ERROR; fdt_val64 = cpu_to_fdt64((unsigned long)*map->map); - err = fdt_setprop_inplace(fdt, node, "linux,uefi-mmap-start", - &fdt_val64, sizeof(fdt_val64)); + + err = fdt_setprop_inplace_var(fdt, node, "linux,uefi-mmap-start", fdt_val64); if (err) return EFI_LOAD_ERROR; fdt_val32 = cpu_to_fdt32(*map->map_size); - err = fdt_setprop_inplace(fdt, node, "linux,uefi-mmap-size", - &fdt_val32, sizeof(fdt_val32)); + + err = fdt_setprop_inplace_var(fdt, node, "linux,uefi-mmap-size", fdt_val32); if (err) return EFI_LOAD_ERROR; fdt_val32 = cpu_to_fdt32(*map->desc_size); - err = fdt_setprop_inplace(fdt, node, "linux,uefi-mmap-desc-size", - &fdt_val32, sizeof(fdt_val32)); + + err = fdt_setprop_inplace_var(fdt, node, "linux,uefi-mmap-desc-size", fdt_val32); if (err) return EFI_LOAD_ERROR; fdt_val32 = cpu_to_fdt32(*map->desc_ver); - err = fdt_setprop_inplace(fdt, node, "linux,uefi-mmap-desc-ver", - &fdt_val32, sizeof(fdt_val32)); + + err = fdt_setprop_inplace_var(fdt, node, "linux,uefi-mmap-desc-ver", fdt_val32); if (err) return EFI_LOAD_ERROR; @@ -209,13 +201,13 @@ static efi_status_t update_fdt_memmap(void *fdt, struct efi_boot_memmap *map) } #ifndef EFI_FDT_ALIGN -#define EFI_FDT_ALIGN EFI_PAGE_SIZE +# define EFI_FDT_ALIGN EFI_PAGE_SIZE #endif struct exit_boot_struct { - efi_memory_desc_t *runtime_map; - int *runtime_entry_count; - void *new_fdt_addr; + efi_memory_desc_t *runtime_map; + int *runtime_entry_count; + void *new_fdt_addr; }; static efi_status_t exit_boot_func(efi_system_table_t *sys_table_arg, @@ -235,7 +227,7 @@ static efi_status_t exit_boot_func(efi_system_table_t *sys_table_arg, } #ifndef MAX_FDT_SIZE -#define MAX_FDT_SIZE SZ_2M +# define MAX_FDT_SIZE SZ_2M #endif /* @@ -266,16 +258,16 @@ efi_status_t allocate_new_fdt_and_exit_boot(efi_system_table_t *sys_table, unsigned long mmap_key; efi_memory_desc_t *memory_map, *runtime_map; efi_status_t status; - int runtime_entry_count = 0; + int runtime_entry_count; struct efi_boot_memmap map; struct exit_boot_struct priv; - map.map = &runtime_map; - map.map_size = &map_size; - map.desc_size = &desc_size; - map.desc_ver = &desc_ver; - map.key_ptr = &mmap_key; - map.buff_size = &buff_size; + map.map = &runtime_map; + map.map_size = &map_size; + map.desc_size = &desc_size; + map.desc_ver = &desc_ver; + map.key_ptr = &mmap_key; + map.buff_size = &buff_size; /* * Get a copy of the current memory map that we will use to prepare @@ -289,15 +281,13 @@ efi_status_t allocate_new_fdt_and_exit_boot(efi_system_table_t *sys_table, return status; } - pr_efi(sys_table, - "Exiting boot services and installing virtual address map...\n"); + pr_efi(sys_table, "Exiting boot services and installing virtual address map...\n"); map.map = &memory_map; status = efi_high_alloc(sys_table, MAX_FDT_SIZE, EFI_FDT_ALIGN, new_fdt_addr, max_addr); if (status != EFI_SUCCESS) { - pr_efi_err(sys_table, - "Unable to allocate memory for new device tree.\n"); + pr_efi_err(sys_table, "Unable to allocate memory for new device tree.\n"); goto fail; } @@ -318,15 +308,19 @@ efi_status_t allocate_new_fdt_and_exit_boot(efi_system_table_t *sys_table, goto fail_free_new_fdt; } - priv.runtime_map = runtime_map; - priv.runtime_entry_count = &runtime_entry_count; - priv.new_fdt_addr = (void *)*new_fdt_addr; - status = efi_exit_boot_services(sys_table, handle, &map, &priv, - exit_boot_func); + runtime_entry_count = 0; + priv.runtime_map = runtime_map; + priv.runtime_entry_count = &runtime_entry_count; + priv.new_fdt_addr = (void *)*new_fdt_addr; + + status = efi_exit_boot_services(sys_table, handle, &map, &priv, exit_boot_func); if (status == EFI_SUCCESS) { efi_set_virtual_address_map_t *svam; + if (novamap()) + return EFI_SUCCESS; + /* Install the new virtual address map */ svam = sys_table->runtime->set_virtual_address_map; status = svam(runtime_entry_count * desc_size, desc_size, @@ -363,6 +357,7 @@ fail_free_new_fdt: fail: sys_table->boottime->free_pool(runtime_map); + return EFI_LOAD_ERROR; } diff --git a/drivers/firmware/efi/libstub/gop.c b/drivers/firmware/efi/libstub/gop.c @@ -1,10 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0 /* ----------------------------------------------------------------------- * * 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/drivers/firmware/efi/libstub/random.c b/drivers/firmware/efi/libstub/random.c @@ -1,10 +1,6 @@ +// SPDX-License-Identifier: GPL-2.0 /* * Copyright (C) 2016 Linaro Ltd; <ard.biesheuvel@linaro.org> - * - * 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/efi.h> diff --git a/drivers/firmware/efi/libstub/secureboot.c b/drivers/firmware/efi/libstub/secureboot.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0 /* * Secure boot handling. * @@ -5,9 +6,6 @@ * Roy Franz <roy.franz@linaro.org * Copyright (C) 2013 Red Hat, Inc. * Mark Salter <msalter@redhat.com> - * - * 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> #include <asm/efi.h> diff --git a/drivers/firmware/efi/libstub/tpm.c b/drivers/firmware/efi/libstub/tpm.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0 /* * TPM handling. * @@ -5,9 +6,6 @@ * Copyright (C) 2017 Google, Inc. * Matthew Garrett <mjg59@google.com> * Thiebaud Weksteen <tweek@google.com> - * - * 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> #include <linux/tpm_eventlog.h> diff --git a/drivers/firmware/efi/memattr.c b/drivers/firmware/efi/memattr.c @@ -1,9 +1,6 @@ +// SPDX-License-Identifier: GPL-2.0 /* * Copyright (C) 2016 Linaro Ltd. <ard.biesheuvel@linaro.org> - * - * 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. */ #define pr_fmt(fmt) "efi: memattr: " fmt @@ -94,7 +91,7 @@ static bool entry_is_valid(const efi_memory_desc_t *in, efi_memory_desc_t *out) if (!(md->attribute & EFI_MEMORY_RUNTIME)) continue; - if (md->virt_addr == 0) { + if (md->virt_addr == 0 && md->phys_addr != 0) { /* no virtual mapping has been installed by the stub */ break; } diff --git a/drivers/firmware/efi/runtime-map.c b/drivers/firmware/efi/runtime-map.c @@ -1,8 +1,7 @@ +// SPDX-License-Identifier: GPL-2.0 /* * linux/drivers/efi/runtime-map.c * Copyright (C) 2013 Red Hat, Inc., Dave Young <dyoung@redhat.com> - * - * This file is released under the GPLv2. */ #include <linux/string.h> diff --git a/drivers/firmware/efi/runtime-wrappers.c b/drivers/firmware/efi/runtime-wrappers.c @@ -85,7 +85,7 @@ struct efi_runtime_work efi_rts_work; pr_err("Failed to queue work to efi_rts_wq.\n"); \ \ exit: \ - efi_rts_work.efi_rts_id = NONE; \ + efi_rts_work.efi_rts_id = EFI_NONE; \ efi_rts_work.status; \ }) @@ -175,50 +175,50 @@ static void efi_call_rts(struct work_struct *work) arg5 = efi_rts_work.arg5; switch (efi_rts_work.efi_rts_id) { - case GET_TIME: + case EFI_GET_TIME: status = efi_call_virt(get_time, (efi_time_t *)arg1, (efi_time_cap_t *)arg2); break; - case SET_TIME: + case EFI_SET_TIME: status = efi_call_virt(set_time, (efi_time_t *)arg1); break; - case GET_WAKEUP_TIME: + case EFI_GET_WAKEUP_TIME: status = efi_call_virt(get_wakeup_time, (efi_bool_t *)arg1, (efi_bool_t *)arg2, (efi_time_t *)arg3); break; - case SET_WAKEUP_TIME: + case EFI_SET_WAKEUP_TIME: status = efi_call_virt(set_wakeup_time, *(efi_bool_t *)arg1, (efi_time_t *)arg2); break; - case GET_VARIABLE: + case EFI_GET_VARIABLE: status = efi_call_virt(get_variable, (efi_char16_t *)arg1, (efi_guid_t *)arg2, (u32 *)arg3, (unsigned long *)arg4, (void *)arg5); break; - case GET_NEXT_VARIABLE: + case EFI_GET_NEXT_VARIABLE: status = efi_call_virt(get_next_variable, (unsigned long *)arg1, (efi_char16_t *)arg2, (efi_guid_t *)arg3); break; - case SET_VARIABLE: + case EFI_SET_VARIABLE: status = efi_call_virt(set_variable, (efi_char16_t *)arg1, (efi_guid_t *)arg2, *(u32 *)arg3, *(unsigned long *)arg4, (void *)arg5); break; - case QUERY_VARIABLE_INFO: + case EFI_QUERY_VARIABLE_INFO: status = efi_call_virt(query_variable_info, *(u32 *)arg1, (u64 *)arg2, (u64 *)arg3, (u64 *)arg4); break; - case GET_NEXT_HIGH_MONO_COUNT: + case EFI_GET_NEXT_HIGH_MONO_COUNT: status = efi_call_virt(get_next_high_mono_count, (u32 *)arg1); break; - case UPDATE_CAPSULE: + case EFI_UPDATE_CAPSULE: status = efi_call_virt(update_capsule, (efi_capsule_header_t **)arg1, *(unsigned long *)arg2, *(unsigned long *)arg3); break; - case QUERY_CAPSULE_CAPS: + case EFI_QUERY_CAPSULE_CAPS: status = efi_call_virt(query_capsule_caps, (efi_capsule_header_t **)arg1, *(unsigned long *)arg2, (u64 *)arg3, @@ -242,7 +242,7 @@ static efi_status_t virt_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc) if (down_interruptible(&efi_runtime_lock)) return EFI_ABORTED; - status = efi_queue_work(GET_TIME, tm, tc, NULL, NULL, NULL); + status = efi_queue_work(EFI_GET_TIME, tm, tc, NULL, NULL, NULL); up(&efi_runtime_lock); return status; } @@ -253,7 +253,7 @@ static efi_status_t virt_efi_set_time(efi_time_t *tm) if (down_interruptible(&efi_runtime_lock)) return EFI_ABORTED; - status = efi_queue_work(SET_TIME, tm, NULL, NULL, NULL, NULL); + status = efi_queue_work(EFI_SET_TIME, tm, NULL, NULL, NULL, NULL); up(&efi_runtime_lock); return status; } @@ -266,7 +266,7 @@ static efi_status_t virt_efi_get_wakeup_time(efi_bool_t *enabled, if (down_interruptible(&efi_runtime_lock)) return EFI_ABORTED; - status = efi_queue_work(GET_WAKEUP_TIME, enabled, pending, tm, NULL, + status = efi_queue_work(EFI_GET_WAKEUP_TIME, enabled, pending, tm, NULL, NULL); up(&efi_runtime_lock); return status; @@ -278,7 +278,7 @@ static efi_status_t virt_efi_set_wakeup_time(efi_bool_t enabled, efi_time_t *tm) if (down_interruptible(&efi_runtime_lock)) return EFI_ABORTED; - status = efi_queue_work(SET_WAKEUP_TIME, &enabled, tm, NULL, NULL, + status = efi_queue_work(EFI_SET_WAKEUP_TIME, &enabled, tm, NULL, NULL, NULL); up(&efi_runtime_lock); return status; @@ -294,7 +294,7 @@ static efi_status_t virt_efi_get_variable(efi_char16_t *name, if (down_interruptible(&efi_runtime_lock)) return EFI_ABORTED; - status = efi_queue_work(GET_VARIABLE, name, vendor, attr, data_size, + status = efi_queue_work(EFI_GET_VARIABLE, name, vendor, attr, data_size, data); up(&efi_runtime_lock); return status; @@ -308,7 +308,7 @@ static efi_status_t virt_efi_get_next_variable(unsigned long *name_size, if (down_interruptible(&efi_runtime_lock)) return EFI_ABORTED; - status = efi_queue_work(GET_NEXT_VARIABLE, name_size, name, vendor, + status = efi_queue_work(EFI_GET_NEXT_VARIABLE, name_size, name, vendor, NULL, NULL); up(&efi_runtime_lock); return status; @@ -324,7 +324,7 @@ static efi_status_t virt_efi_set_variable(efi_char16_t *name, if (down_interruptible(&efi_runtime_lock)) return EFI_ABORTED; - status = efi_queue_work(SET_VARIABLE, name, vendor, &attr, &data_size, + status = efi_queue_work(EFI_SET_VARIABLE, name, vendor, &attr, &data_size, data); up(&efi_runtime_lock); return status; @@ -359,7 +359,7 @@ static efi_status_t virt_efi_query_variable_info(u32 attr, if (down_interruptible(&efi_runtime_lock)) return EFI_ABORTED; - status = efi_queue_work(QUERY_VARIABLE_INFO, &attr, storage_space, + status = efi_queue_work(EFI_QUERY_VARIABLE_INFO, &attr, storage_space, remaining_space, max_variable_size, NULL); up(&efi_runtime_lock); return status; @@ -391,7 +391,7 @@ static efi_status_t virt_efi_get_next_high_mono_count(u32 *count) if (down_interruptible(&efi_runtime_lock)) return EFI_ABORTED; - status = efi_queue_work(GET_NEXT_HIGH_MONO_COUNT, count, NULL, NULL, + status = efi_queue_work(EFI_GET_NEXT_HIGH_MONO_COUNT, count, NULL, NULL, NULL, NULL); up(&efi_runtime_lock); return status; @@ -407,7 +407,7 @@ static void virt_efi_reset_system(int reset_type, "could not get exclusive access to the firmware\n"); return; } - efi_rts_work.efi_rts_id = RESET_SYSTEM; + efi_rts_work.efi_rts_id = EFI_RESET_SYSTEM; __efi_call_virt(reset_system, reset_type, status, data_size, data); up(&efi_runtime_lock); } @@ -423,7 +423,7 @@ static efi_status_t virt_efi_update_capsule(efi_capsule_header_t **capsules, if (down_interruptible(&efi_runtime_lock)) return EFI_ABORTED; - status = efi_queue_work(UPDATE_CAPSULE, capsules, &count, &sg_list, + status = efi_queue_work(EFI_UPDATE_CAPSULE, capsules, &count, &sg_list, NULL, NULL); up(&efi_runtime_lock); return status; @@ -441,7 +441,7 @@ static efi_status_t virt_efi_query_capsule_caps(efi_capsule_header_t **capsules, if (down_interruptible(&efi_runtime_lock)) return EFI_ABORTED; - status = efi_queue_work(QUERY_CAPSULE_CAPS, capsules, &count, + status = efi_queue_work(EFI_QUERY_CAPSULE_CAPS, capsules, &count, max_size, reset_type, NULL); up(&efi_runtime_lock); return status; diff --git a/drivers/firmware/efi/test/efi_test.c b/drivers/firmware/efi/test/efi_test.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * EFI Test Driver for Runtime Services * diff --git a/drivers/firmware/efi/test/efi_test.h b/drivers/firmware/efi/test/efi_test.h @@ -1,4 +1,4 @@ -/* SPDX-License-Identifier: GPL-2.0 */ +/* SPDX-License-Identifier: GPL-2.0+ */ /* * EFI Test driver Header * diff --git a/drivers/firmware/efi/tpm.c b/drivers/firmware/efi/tpm.c @@ -1,10 +1,7 @@ +// SPDX-License-Identifier: GPL-2.0 /* * Copyright (C) 2017 Google, Inc. * Thiebaud Weksteen <tweek@google.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/efi.h> diff --git a/drivers/firmware/efi/vars.c b/drivers/firmware/efi/vars.c @@ -1,22 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * Originally from efivars.c * * Copyright (C) 2001,2003,2004 Dell <Matt_Domsch@dell.com> * Copyright (C) 2004 Intel Corporation <matthew.e.tolentino@intel.com> - * - * 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, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include <linux/capability.h> diff --git a/include/linux/efi.h b/include/linux/efi.h @@ -48,7 +48,20 @@ typedef u16 efi_char16_t; /* UNICODE character */ typedef u64 efi_physical_addr_t; typedef void *efi_handle_t; -typedef guid_t efi_guid_t; +/* + * The UEFI spec and EDK2 reference implementation both define EFI_GUID as + * struct { u32 a; u16; b; u16 c; u8 d[8]; }; and so the implied alignment + * is 32 bits not 8 bits like our guid_t. In some cases (i.e., on 32-bit ARM), + * this means that firmware services invoked by the kernel may assume that + * efi_guid_t* arguments are 32-bit aligned, and use memory accessors that + * do not tolerate misalignment. So let's set the minimum alignment to 32 bits. + * + * Note that the UEFI spec as well as some comments in the EDK2 code base + * suggest that EFI_GUID should be 64-bit aligned, but this appears to be + * a mistake, given that no code seems to exist that actually enforces that + * or relies on it. + */ +typedef guid_t efi_guid_t __aligned(__alignof__(u32)); #define EFI_GUID(a,b,c,d0,d1,d2,d3,d4,d5,d6,d7) \ GUID_INIT(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7) @@ -1699,19 +1712,19 @@ extern int efi_tpm_eventlog_init(void); * fault happened while executing an efi runtime service. */ enum efi_rts_ids { - NONE, - GET_TIME, - SET_TIME, - GET_WAKEUP_TIME, - SET_WAKEUP_TIME, - GET_VARIABLE, - GET_NEXT_VARIABLE, - SET_VARIABLE, - QUERY_VARIABLE_INFO, - GET_NEXT_HIGH_MONO_COUNT, - RESET_SYSTEM, - UPDATE_CAPSULE, - QUERY_CAPSULE_CAPS, + EFI_NONE, + EFI_GET_TIME, + EFI_SET_TIME, + EFI_GET_WAKEUP_TIME, + EFI_SET_WAKEUP_TIME, + EFI_GET_VARIABLE, + EFI_GET_NEXT_VARIABLE, + EFI_SET_VARIABLE, + EFI_QUERY_VARIABLE_INFO, + EFI_GET_NEXT_HIGH_MONO_COUNT, + EFI_RESET_SYSTEM, + EFI_UPDATE_CAPSULE, + EFI_QUERY_CAPSULE_CAPS, }; /*