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authorLinus Torvalds <torvalds@linux-foundation.org>2017-05-02 04:20:03 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2017-05-02 04:20:03 +0300
commit3711c94fd6593318146348c940d81040acf9e877 (patch)
tree46119e721e66184e4e73c3e59307047677dfc7cc /arch/x86/platform
parent174ddfd5dfbfc2d91a45332f809977050ac3fdc5 (diff)
parent197decefdb79d6f1350ba0316ce26ba737372d0c (diff)
downloadlinux-3711c94fd6593318146348c940d81040acf9e877.tar.xz
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 changes in this cycle were: - move BGRT handling to drivers/acpi so it can be shared between x86 and ARM - bring the EFI stub's initrd and FDT allocation logic in line with the latest changes to the arm64 boot protocol - improvements and fixes to the EFI stub's command line parsing routines - randomize the virtual mapping of the UEFI runtime services on ARM/arm64 - ... and other misc enhancements, cleanups and fixes" * 'efi-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: efi/libstub/arm: Don't use TASK_SIZE when randomizing the RT space ef/libstub/arm/arm64: Randomize the base of the UEFI rt services region efi/libstub/arm/arm64: Disable debug prints on 'quiet' cmdline arg efi/libstub: Unify command line param parsing efi/libstub: Fix harmless command line parsing bug efi/arm32-stub: Allow boot-time allocations in the vmlinux region x86/efi: Clean up a minor mistake in comment efi/pstore: Return error code (if any) from efi_pstore_write() efi/bgrt: Enable ACPI BGRT handling on arm64 x86/efi/bgrt: Move efi-bgrt handling out of arch/x86 efi/arm-stub: Round up FDT allocation to mapping size efi/arm-stub: Correct FDT and initrd allocation rules for arm64
Diffstat (limited to 'arch/x86/platform')
-rw-r--r--arch/x86/platform/efi/Makefile1
-rw-r--r--arch/x86/platform/efi/efi-bgrt.c84
-rw-r--r--arch/x86/platform/efi/efi_64.c2
3 files changed, 1 insertions, 86 deletions
diff --git a/arch/x86/platform/efi/Makefile b/arch/x86/platform/efi/Makefile
index 066619b0700c..f1d83b34c329 100644
--- a/arch/x86/platform/efi/Makefile
+++ b/arch/x86/platform/efi/Makefile
@@ -1,6 +1,5 @@
OBJECT_FILES_NON_STANDARD_efi_thunk_$(BITS).o := y
obj-$(CONFIG_EFI) += quirks.o efi.o efi_$(BITS).o efi_stub_$(BITS).o
-obj-$(CONFIG_ACPI_BGRT) += efi-bgrt.o
obj-$(CONFIG_EARLY_PRINTK_EFI) += early_printk.o
obj-$(CONFIG_EFI_MIXED) += efi_thunk_$(BITS).o
diff --git a/arch/x86/platform/efi/efi-bgrt.c b/arch/x86/platform/efi/efi-bgrt.c
deleted file mode 100644
index 04ca8764f0c0..000000000000
--- a/arch/x86/platform/efi/efi-bgrt.c
+++ /dev/null
@@ -1,84 +0,0 @@
-/*
- * Copyright 2012 Intel Corporation
- * Author: Josh Triplett <josh@joshtriplett.org>
- *
- * 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
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/acpi.h>
-#include <linux/efi.h>
-#include <linux/efi-bgrt.h>
-
-struct acpi_table_bgrt bgrt_tab;
-size_t __initdata bgrt_image_size;
-
-struct bmp_header {
- u16 id;
- u32 size;
-} __packed;
-
-void __init efi_bgrt_init(struct acpi_table_header *table)
-{
- void *image;
- struct bmp_header bmp_header;
- struct acpi_table_bgrt *bgrt = &bgrt_tab;
-
- if (acpi_disabled)
- return;
-
- if (table->length < sizeof(bgrt_tab)) {
- pr_notice("Ignoring BGRT: invalid length %u (expected %zu)\n",
- table->length, sizeof(bgrt_tab));
- return;
- }
- *bgrt = *(struct acpi_table_bgrt *)table;
- if (bgrt->version != 1) {
- pr_notice("Ignoring BGRT: invalid version %u (expected 1)\n",
- bgrt->version);
- goto out;
- }
- if (bgrt->status & 0xfe) {
- pr_notice("Ignoring BGRT: reserved status bits are non-zero %u\n",
- bgrt->status);
- goto out;
- }
- if (bgrt->image_type != 0) {
- pr_notice("Ignoring BGRT: invalid image type %u (expected 0)\n",
- bgrt->image_type);
- goto out;
- }
- if (!bgrt->image_address) {
- pr_notice("Ignoring BGRT: null image address\n");
- goto out;
- }
-
- image = early_memremap(bgrt->image_address, sizeof(bmp_header));
- if (!image) {
- pr_notice("Ignoring BGRT: failed to map image header memory\n");
- goto out;
- }
-
- memcpy(&bmp_header, image, sizeof(bmp_header));
- early_memunmap(image, sizeof(bmp_header));
- if (bmp_header.id != 0x4d42) {
- pr_notice("Ignoring BGRT: Incorrect BMP magic number 0x%x (expected 0x4d42)\n",
- bmp_header.id);
- goto out;
- }
- bgrt_image_size = bmp_header.size;
- efi_mem_reserve(bgrt->image_address, bgrt_image_size);
-
- return;
-out:
- memset(bgrt, 0, sizeof(bgrt_tab));
-}
diff --git a/arch/x86/platform/efi/efi_64.c b/arch/x86/platform/efi/efi_64.c
index a4695da42d77..6cbf9e036aa8 100644
--- a/arch/x86/platform/efi/efi_64.c
+++ b/arch/x86/platform/efi/efi_64.c
@@ -47,7 +47,7 @@
#include <asm/pgalloc.h>
/*
- * We allocate runtime services regions bottom-up, starting from -4G, i.e.
+ * We allocate runtime services regions top-down, starting from -4G, i.e.
* 0xffff_ffff_0000_0000 and limit EFI VA mapping space to 64G.
*/
static u64 efi_va = EFI_VA_START;