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

46 files changed, 393 insertions, 567 deletions

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 74dddbf54cd1..a87418990d39 100644
--- 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
index cd5f443865ec..3aff508ffd86 100644
--- 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
index 5a02dd608f74..90b562a34d65 100644
--- 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
index 0723dff17e6c..15d0fbe27872 100644
--- 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
index 107283b1eb1e..606a4b6a9812 100644
--- 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
index 374a52fa5296..9b33904251a9 100644
--- 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
index 5378d10f1d31..0029604af8a4 100644
--- 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
index e4dc3862d423..fe29f3f5d384 100644
--- 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
deleted file mode 100644
index 7138bc7a265c..000000000000
--- a/arch/x86/platform/efi/early_printk.c
+++ /dev/null
@@ -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
index 17456a1d3f04..458a0e2bcc57 100644
--- 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
index 89110dfc7127..190be0b1d109 100644
--- 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
index 5f9f5039de50..d2d0d2030620 100644
--- 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
index ac1654f74dc7..0e206c9e0d7a 100644
--- 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
index 1a6a77df8a5e..311cd349a862 100644
--- 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
index 352bd2473162..f99995666f86 100644
--- 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
index 96688986da56..b1395133389e 100644
--- 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
index 4938c29b7c5d..598b7800d14e 100644
--- 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
index 502811344e81..36d3b8b9da47 100644
--- 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
index a7902fccdcfa..6a966ecdd80a 100644
--- 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
index 85d1834ee9b7..85ec99f97841 100644
--- 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
new file mode 100644
index 000000000000..c9a0efca17b0
--- /dev/null
+++ 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);