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-rw-r--r--arch/arm/boot/compressed/efi-header.S160
-rw-r--r--arch/arm/boot/compressed/vmlinux.lds.S30
-rw-r--r--arch/arm64/include/asm/efi.h3
-rw-r--r--drivers/firmware/dcdbas.c2
-rw-r--r--drivers/firmware/efi/arm-init.c8
-rw-r--r--drivers/firmware/efi/efi.c2
-rw-r--r--drivers/firmware/efi/esrt.c2
-rw-r--r--drivers/firmware/efi/libstub/Makefile2
-rw-r--r--drivers/firmware/efi/libstub/arm64-stub.c10
-rw-r--r--drivers/firmware/efi/reboot.c12
-rw-r--r--drivers/video/fbdev/efifb.c31
11 files changed, 158 insertions, 104 deletions
diff --git a/arch/arm/boot/compressed/efi-header.S b/arch/arm/boot/compressed/efi-header.S
index a17ca8d78656..c94a88ae834d 100644
--- a/arch/arm/boot/compressed/efi-header.S
+++ b/arch/arm/boot/compressed/efi-header.S
@@ -1,5 +1,5 @@
/*
- * Copyright (C) 2013-2015 Linaro Ltd
+ * Copyright (C) 2013-2017 Linaro Ltd
* Authors: Roy Franz <roy.franz@linaro.org>
* Ard Biesheuvel <ard.biesheuvel@linaro.org>
*
@@ -8,6 +8,9 @@
* published by the Free Software Foundation.
*/
+#include <linux/pe.h>
+#include <linux/sizes.h>
+
.macro __nop
#ifdef CONFIG_EFI_STUB
@ This is almost but not quite a NOP, since it does clobber the
@@ -15,7 +18,7 @@
@ PE/COFF expects the magic string "MZ" at offset 0, while the
@ ARM/Linux boot protocol expects an executable instruction
@ there.
- .inst 'M' | ('Z' << 8) | (0x1310 << 16) @ tstne r0, #0x4d000
+ .inst MZ_MAGIC | (0x1310 << 16) @ tstne r0, #0x4d000
#else
AR_CLASS( mov r0, r0 )
M_CLASS( nop.w )
@@ -34,96 +37,97 @@
@ The only 2 fields of the MSDOS header that are used are this
@ PE/COFF offset, and the "MZ" bytes at offset 0x0.
@
- .long pe_header - start @ Offset to the PE header.
+ .long pe_header - start @ Offset to the PE header.
pe_header:
- .ascii "PE\0\0"
+ .long PE_MAGIC
coff_header:
- .short 0x01c2 @ ARM or Thumb
- .short 2 @ nr_sections
- .long 0 @ TimeDateStamp
- .long 0 @ PointerToSymbolTable
- .long 1 @ NumberOfSymbols
- .short section_table - optional_header
- @ SizeOfOptionalHeader
- .short 0x306 @ Characteristics.
- @ IMAGE_FILE_32BIT_MACHINE |
- @ IMAGE_FILE_DEBUG_STRIPPED |
- @ IMAGE_FILE_EXECUTABLE_IMAGE |
- @ IMAGE_FILE_LINE_NUMS_STRIPPED
+ .short IMAGE_FILE_MACHINE_THUMB @ Machine
+ .short section_count @ NumberOfSections
+ .long 0 @ TimeDateStamp
+ .long 0 @ PointerToSymbolTable
+ .long 0 @ NumberOfSymbols
+ .short section_table - optional_header @ SizeOfOptionalHeader
+ .short IMAGE_FILE_32BIT_MACHINE | \
+ IMAGE_FILE_DEBUG_STRIPPED | \
+ IMAGE_FILE_EXECUTABLE_IMAGE | \
+ IMAGE_FILE_LINE_NUMS_STRIPPED @ Characteristics
+
+#define __pecoff_code_size (__pecoff_data_start - __efi_start)
optional_header:
- .short 0x10b @ PE32 format
- .byte 0x02 @ MajorLinkerVersion
- .byte 0x14 @ MinorLinkerVersion
- .long _end - __efi_start @ SizeOfCode
- .long 0 @ SizeOfInitializedData
- .long 0 @ SizeOfUninitializedData
- .long efi_stub_entry - start @ AddressOfEntryPoint
- .long start_offset @ BaseOfCode
- .long 0 @ data
+ .short PE_OPT_MAGIC_PE32 @ PE32 format
+ .byte 0x02 @ MajorLinkerVersion
+ .byte 0x14 @ MinorLinkerVersion
+ .long __pecoff_code_size @ SizeOfCode
+ .long __pecoff_data_size @ SizeOfInitializedData
+ .long 0 @ SizeOfUninitializedData
+ .long efi_stub_entry - start @ AddressOfEntryPoint
+ .long start_offset @ BaseOfCode
+ .long __pecoff_data_start - start @ BaseOfData
extra_header_fields:
- .long 0 @ ImageBase
- .long 0x200 @ SectionAlignment
- .long 0x200 @ FileAlignment
- .short 0 @ MajorOperatingSystemVersion
- .short 0 @ MinorOperatingSystemVersion
- .short 0 @ MajorImageVersion
- .short 0 @ MinorImageVersion
- .short 0 @ MajorSubsystemVersion
- .short 0 @ MinorSubsystemVersion
- .long 0 @ Win32VersionValue
+ .long 0 @ ImageBase
+ .long SZ_4K @ SectionAlignment
+ .long SZ_512 @ FileAlignment
+ .short 0 @ MajorOsVersion
+ .short 0 @ MinorOsVersion
+ .short 0 @ MajorImageVersion
+ .short 0 @ MinorImageVersion
+ .short 0 @ MajorSubsystemVersion
+ .short 0 @ MinorSubsystemVersion
+ .long 0 @ Win32VersionValue
- .long _end - start @ SizeOfImage
- .long start_offset @ SizeOfHeaders
- .long 0 @ CheckSum
- .short 0xa @ Subsystem (EFI application)
- .short 0 @ DllCharacteristics
- .long 0 @ SizeOfStackReserve
- .long 0 @ SizeOfStackCommit
- .long 0 @ SizeOfHeapReserve
- .long 0 @ SizeOfHeapCommit
- .long 0 @ LoaderFlags
- .long 0x6 @ NumberOfRvaAndSizes
+ .long __pecoff_end - start @ SizeOfImage
+ .long start_offset @ SizeOfHeaders
+ .long 0 @ CheckSum
+ .short IMAGE_SUBSYSTEM_EFI_APPLICATION @ Subsystem
+ .short 0 @ DllCharacteristics
+ .long 0 @ SizeOfStackReserve
+ .long 0 @ SizeOfStackCommit
+ .long 0 @ SizeOfHeapReserve
+ .long 0 @ SizeOfHeapCommit
+ .long 0 @ LoaderFlags
+ .long (section_table - .) / 8 @ NumberOfRvaAndSizes
- .quad 0 @ ExportTable
- .quad 0 @ ImportTable
- .quad 0 @ ResourceTable
- .quad 0 @ ExceptionTable
- .quad 0 @ CertificationTable
- .quad 0 @ BaseRelocationTable
+ .quad 0 @ ExportTable
+ .quad 0 @ ImportTable
+ .quad 0 @ ResourceTable
+ .quad 0 @ ExceptionTable
+ .quad 0 @ CertificationTable
+ .quad 0 @ BaseRelocationTable
section_table:
- @
- @ The EFI application loader requires a relocation section
- @ because EFI applications must be relocatable. This is a
- @ dummy section as far as we are concerned.
- @
- .ascii ".reloc\0\0"
- .long 0 @ VirtualSize
- .long 0 @ VirtualAddress
- .long 0 @ SizeOfRawData
- .long 0 @ PointerToRawData
- .long 0 @ PointerToRelocations
- .long 0 @ PointerToLineNumbers
- .short 0 @ NumberOfRelocations
- .short 0 @ NumberOfLineNumbers
- .long 0x42100040 @ Characteristics
-
.ascii ".text\0\0\0"
- .long _end - __efi_start @ VirtualSize
- .long __efi_start @ VirtualAddress
- .long _edata - __efi_start @ SizeOfRawData
- .long __efi_start @ PointerToRawData
- .long 0 @ PointerToRelocations
- .long 0 @ PointerToLineNumbers
- .short 0 @ NumberOfRelocations
- .short 0 @ NumberOfLineNumbers
- .long 0xe0500020 @ Characteristics
+ .long __pecoff_code_size @ VirtualSize
+ .long __efi_start @ VirtualAddress
+ .long __pecoff_code_size @ SizeOfRawData
+ .long __efi_start @ PointerToRawData
+ .long 0 @ PointerToRelocations
+ .long 0 @ PointerToLineNumbers
+ .short 0 @ NumberOfRelocations
+ .short 0 @ NumberOfLineNumbers
+ .long IMAGE_SCN_CNT_CODE | \
+ IMAGE_SCN_MEM_READ | \
+ IMAGE_SCN_MEM_EXECUTE @ Characteristics
+
+ .ascii ".data\0\0\0"
+ .long __pecoff_data_size @ VirtualSize
+ .long __pecoff_data_start - start @ VirtualAddress
+ .long __pecoff_data_rawsize @ SizeOfRawData
+ .long __pecoff_data_start - start @ PointerToRawData
+ .long 0 @ PointerToRelocations
+ .long 0 @ PointerToLineNumbers
+ .short 0 @ NumberOfRelocations
+ .short 0 @ NumberOfLineNumbers
+ .long IMAGE_SCN_CNT_INITIALIZED_DATA | \
+ IMAGE_SCN_MEM_READ | \
+ IMAGE_SCN_MEM_WRITE @ Characteristics
+
+ .set section_count, (. - section_table) / 40
- .align 9
+ .align 12
__efi_start:
#endif
.endm
diff --git a/arch/arm/boot/compressed/vmlinux.lds.S b/arch/arm/boot/compressed/vmlinux.lds.S
index 81c493156ce8..7a4c59154361 100644
--- a/arch/arm/boot/compressed/vmlinux.lds.S
+++ b/arch/arm/boot/compressed/vmlinux.lds.S
@@ -48,13 +48,6 @@ SECTIONS
*(.rodata)
*(.rodata.*)
}
- .data : {
- /*
- * The EFI stub always executes from RAM, and runs strictly before the
- * decompressor, so we can make an exception for its r/w data, and keep it
- */
- *(.data.efistub)
- }
.piggydata : {
*(.piggydata)
}
@@ -70,6 +63,26 @@ SECTIONS
/* ensure the zImage file size is always a multiple of 64 bits */
/* (without a dummy byte, ld just ignores the empty section) */
.pad : { BYTE(0); . = ALIGN(8); }
+
+#ifdef CONFIG_EFI_STUB
+ .data : ALIGN(4096) {
+ __pecoff_data_start = .;
+ /*
+ * The EFI stub always executes from RAM, and runs strictly before the
+ * decompressor, so we can make an exception for its r/w data, and keep it
+ */
+ *(.data.efistub)
+ __pecoff_data_end = .;
+
+ /*
+ * PE/COFF mandates a file size which is a multiple of 512 bytes if the
+ * section size equals or exceeds 4 KB
+ */
+ . = ALIGN(512);
+ }
+ __pecoff_data_rawsize = . - ADDR(.data);
+#endif
+
_edata = .;
_magic_sig = ZIMAGE_MAGIC(0x016f2818);
@@ -84,6 +97,9 @@ SECTIONS
. = ALIGN(8); /* the stack must be 64-bit aligned */
.stack : { *(.stack) }
+ PROVIDE(__pecoff_data_size = ALIGN(512) - ADDR(.data));
+ PROVIDE(__pecoff_end = ALIGN(512));
+
.stab 0 : { *(.stab) }
.stabstr 0 : { *(.stabstr) }
.stab.excl 0 : { *(.stab.excl) }
diff --git a/arch/arm64/include/asm/efi.h b/arch/arm64/include/asm/efi.h
index 8f3043aba873..464ac850c5e2 100644
--- a/arch/arm64/include/asm/efi.h
+++ b/arch/arm64/include/asm/efi.h
@@ -81,6 +81,9 @@ static inline unsigned long efi_get_max_initrd_addr(unsigned long dram_base,
#define alloc_screen_info(x...) &screen_info
#define free_screen_info(x...)
+/* redeclare as 'hidden' so the compiler will generate relative references */
+extern struct screen_info screen_info __attribute__((__visibility__("hidden")));
+
static inline void efifb_setup_from_dmi(struct screen_info *si, const char *opt)
{
}
diff --git a/drivers/firmware/dcdbas.c b/drivers/firmware/dcdbas.c
index 2fe1a130189f..c16600f30611 100644
--- a/drivers/firmware/dcdbas.c
+++ b/drivers/firmware/dcdbas.c
@@ -534,7 +534,7 @@ static struct attribute *dcdbas_dev_attrs[] = {
NULL
};
-static struct attribute_group dcdbas_attr_group = {
+static const struct attribute_group dcdbas_attr_group = {
.attrs = dcdbas_dev_attrs,
.bin_attrs = dcdbas_bin_attrs,
};
diff --git a/drivers/firmware/efi/arm-init.c b/drivers/firmware/efi/arm-init.c
index 1027d7b44358..80d1a885def5 100644
--- a/drivers/firmware/efi/arm-init.c
+++ b/drivers/firmware/efi/arm-init.c
@@ -145,6 +145,9 @@ static int __init uefi_init(void)
sizeof(efi_config_table_t),
arch_tables);
+ if (!retval)
+ efi.config_table = (unsigned long)efi.systab->tables;
+
early_memunmap(config_tables, table_size);
out:
early_memunmap(efi.systab, sizeof(efi_system_table_t));
@@ -159,6 +162,7 @@ static __init int is_usable_memory(efi_memory_desc_t *md)
switch (md->type) {
case EFI_LOADER_CODE:
case EFI_LOADER_DATA:
+ case EFI_ACPI_RECLAIM_MEMORY:
case EFI_BOOT_SERVICES_CODE:
case EFI_BOOT_SERVICES_DATA:
case EFI_CONVENTIONAL_MEMORY:
@@ -211,6 +215,10 @@ static __init void reserve_regions(void)
if (!is_usable_memory(md))
memblock_mark_nomap(paddr, size);
+
+ /* keep ACPI reclaim memory intact for kexec etc. */
+ if (md->type == EFI_ACPI_RECLAIM_MEMORY)
+ memblock_reserve(paddr, size);
}
}
}
diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c
index 69d4d130e055..a32e1460ade8 100644
--- a/drivers/firmware/efi/efi.c
+++ b/drivers/firmware/efi/efi.c
@@ -198,7 +198,7 @@ static umode_t efi_attr_is_visible(struct kobject *kobj,
return attr->mode;
}
-static struct attribute_group efi_subsys_attr_group = {
+static const struct attribute_group efi_subsys_attr_group = {
.attrs = efi_subsys_attrs,
.is_visible = efi_attr_is_visible,
};
diff --git a/drivers/firmware/efi/esrt.c b/drivers/firmware/efi/esrt.c
index 8554d7aec31c..bd7ed3c1148a 100644
--- a/drivers/firmware/efi/esrt.c
+++ b/drivers/firmware/efi/esrt.c
@@ -230,7 +230,7 @@ static umode_t esrt_attr_is_visible(struct kobject *kobj,
return attr->mode;
}
-static struct attribute_group esrt_attr_group = {
+static const struct attribute_group esrt_attr_group = {
.attrs = esrt_attrs,
.is_visible = esrt_attr_is_visible,
};
diff --git a/drivers/firmware/efi/libstub/Makefile b/drivers/firmware/efi/libstub/Makefile
index 37e24f525162..cf81e6cf5ae8 100644
--- a/drivers/firmware/efi/libstub/Makefile
+++ b/drivers/firmware/efi/libstub/Makefile
@@ -10,7 +10,7 @@ cflags-$(CONFIG_X86) += -m$(BITS) -D__KERNEL__ -O2 \
-fPIC -fno-strict-aliasing -mno-red-zone \
-mno-mmx -mno-sse
-cflags-$(CONFIG_ARM64) := $(subst -pg,,$(KBUILD_CFLAGS))
+cflags-$(CONFIG_ARM64) := $(subst -pg,,$(KBUILD_CFLAGS)) -fpie
cflags-$(CONFIG_ARM) := $(subst -pg,,$(KBUILD_CFLAGS)) \
-fno-builtin -fpic -mno-single-pic-base
diff --git a/drivers/firmware/efi/libstub/arm64-stub.c b/drivers/firmware/efi/libstub/arm64-stub.c
index b4c2589d7c91..f7a6970e9abc 100644
--- a/drivers/firmware/efi/libstub/arm64-stub.c
+++ b/drivers/firmware/efi/libstub/arm64-stub.c
@@ -9,9 +9,17 @@
* published by the Free Software Foundation.
*
*/
+
+/*
+ * To prevent the compiler from emitting GOT-indirected (and thus absolute)
+ * references to the section markers, override their visibility as 'hidden'
+ */
+#pragma GCC visibility push(hidden)
+#include <asm/sections.h>
+#pragma GCC visibility pop
+
#include <linux/efi.h>
#include <asm/efi.h>
-#include <asm/sections.h>
#include <asm/sysreg.h>
#include "efistub.h"
diff --git a/drivers/firmware/efi/reboot.c b/drivers/firmware/efi/reboot.c
index 62ead9b9d871..7117e2d0c7f9 100644
--- a/drivers/firmware/efi/reboot.c
+++ b/drivers/firmware/efi/reboot.c
@@ -5,6 +5,8 @@
#include <linux/efi.h>
#include <linux/reboot.h>
+void (*orig_pm_power_off)(void);
+
int efi_reboot_quirk_mode = -1;
void efi_reboot(enum reboot_mode reboot_mode, const char *__unused)
@@ -51,6 +53,12 @@ bool __weak efi_poweroff_required(void)
static void efi_power_off(void)
{
efi.reset_system(EFI_RESET_SHUTDOWN, EFI_SUCCESS, 0, NULL);
+ /*
+ * The above call should not return, if it does fall back to
+ * the original power off method (typically ACPI poweroff).
+ */
+ if (orig_pm_power_off)
+ orig_pm_power_off();
}
static int __init efi_shutdown_init(void)
@@ -58,8 +66,10 @@ static int __init efi_shutdown_init(void)
if (!efi_enabled(EFI_RUNTIME_SERVICES))
return -ENODEV;
- if (efi_poweroff_required())
+ if (efi_poweroff_required()) {
+ orig_pm_power_off = pm_power_off;
pm_power_off = efi_power_off;
+ }
return 0;
}
diff --git a/drivers/video/fbdev/efifb.c b/drivers/video/fbdev/efifb.c
index 1e784adb89b1..3a010641f630 100644
--- a/drivers/video/fbdev/efifb.c
+++ b/drivers/video/fbdev/efifb.c
@@ -149,6 +149,10 @@ ATTRIBUTE_GROUPS(efifb);
static bool pci_dev_disabled; /* FB base matches BAR of a disabled device */
+static struct pci_dev *efifb_pci_dev; /* dev with BAR covering the efifb */
+static struct resource *bar_resource;
+static u64 bar_offset;
+
static int efifb_probe(struct platform_device *dev)
{
struct fb_info *info;
@@ -203,6 +207,13 @@ static int efifb_probe(struct platform_device *dev)
efifb_fix.smem_start |= ext_lfb_base;
}
+ if (bar_resource &&
+ bar_resource->start + bar_offset != efifb_fix.smem_start) {
+ dev_info(&efifb_pci_dev->dev,
+ "BAR has moved, updating efifb address\n");
+ efifb_fix.smem_start = bar_resource->start + bar_offset;
+ }
+
efifb_defined.bits_per_pixel = screen_info.lfb_depth;
efifb_defined.xres = screen_info.lfb_width;
efifb_defined.yres = screen_info.lfb_height;
@@ -370,15 +381,13 @@ static struct platform_driver efifb_driver = {
builtin_platform_driver(efifb_driver);
-#if defined(CONFIG_PCI) && !defined(CONFIG_X86)
-
-static bool pci_bar_found; /* did we find a BAR matching the efifb base? */
+#if defined(CONFIG_PCI)
-static void claim_efifb_bar(struct pci_dev *dev, int idx)
+static void record_efifb_bar_resource(struct pci_dev *dev, int idx, u64 offset)
{
u16 word;
- pci_bar_found = true;
+ efifb_pci_dev = dev;
pci_read_config_word(dev, PCI_COMMAND, &word);
if (!(word & PCI_COMMAND_MEMORY)) {
@@ -389,12 +398,8 @@ static void claim_efifb_bar(struct pci_dev *dev, int idx)
return;
}
- if (pci_claim_resource(dev, idx)) {
- pci_dev_disabled = true;
- dev_err(&dev->dev,
- "BAR %d: failed to claim resource for efifb!\n", idx);
- return;
- }
+ bar_resource = &dev->resource[idx];
+ bar_offset = offset;
dev_info(&dev->dev, "BAR %d: assigned to efifb\n", idx);
}
@@ -405,7 +410,7 @@ static void efifb_fixup_resources(struct pci_dev *dev)
u64 size = screen_info.lfb_size;
int i;
- if (pci_bar_found || screen_info.orig_video_isVGA != VIDEO_TYPE_EFI)
+ if (efifb_pci_dev || screen_info.orig_video_isVGA != VIDEO_TYPE_EFI)
return;
if (screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE)
@@ -421,7 +426,7 @@ static void efifb_fixup_resources(struct pci_dev *dev)
continue;
if (res->start <= base && res->end >= base + size - 1) {
- claim_efifb_bar(dev, i);
+ record_efifb_bar_resource(dev, i, base - res->start);
break;
}
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-17 09:57:02 +0000