Merge branch 'x86-trampoline-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 trampoline rework from H. Peter Anvin:
 "This code reworks all the "trampoline"/"realmode" code (various bits
  that need to live in the first megabyte of memory, most but not all of
  which runs in real mode at some point) in the kernel into a single
  object.  The main reason for doing this is that it eliminates the last
  place in the kernel where we needed pages to be mapped RWX.  This code
  separates all that code into proper R/RW/RX pages."

Fix up conflicts in arch/x86/kernel/Makefile (mca removed next to reboot
code), and arch/x86/kernel/reboot.c (reboot code moved around in one
branch, modified in this one), and arch/x86/tools/relocs.c (mostly same
code came in earlier due to working around the ld bugs just before the
3.4 release).

Also remove stale x86-relocs entry from scripts/.gitignore as per Peter
Anvin.

* commit '61f5446169046c217a5479517edac3a890c3bee7': (36 commits)
  x86, realmode: Move end signature into header.S
  x86, relocs: When printing an error, say relative or absolute
  x86, relocs: More relocations which may end up as absolute
  x86, relocs: Workaround for binutils 2.22.52.0.1 section bug
  xen-acpi-processor: Add missing #include <xen/xen.h>
  acpi, bgrd: Add missing <linux/io.h> to drivers/acpi/bgrt.c
  x86, realmode: Change EFER to a single u64 field
  x86, realmode: Move kernel/realmode.c to realmode/init.c
  x86, realmode: Move not-common bits out of trampoline_common.S
  x86, realmode: Mask out EFER.LMA when saving trampoline EFER
  x86, realmode: Fix no cache bits test in reboot_32.S
  x86, realmode: Make sure all generated files are listed in targets
  x86, realmode: build fix: remove duplicate build
  x86, realmode: read cr4 and EFER from kernel for 64-bit trampoline
  x86, realmode: fixes compilation issue in tboot.c
  x86, realmode: move relocs from scripts/ to arch/x86/tools
  x86, realmode: header for trampoline code
  x86, realmode: flattened rm hierachy
  x86, realmode: don't copy real_mode_header
  x86, realmode: fix 64-bit wakeup sequence
  ...

1 files changed, 4 insertions, 29 deletions

diff --git a/arch/x86/kernel/acpi/sleep.c b/arch/x86/kernel/acpi/sleep.c
index 146a49c763a4..95bf99de9058 100644
--- a/arch/x86/kernel/acpi/sleep.c
+++ b/arch/x86/kernel/acpi/sleep.c
@@ -14,8 +14,9 @@
 #include <asm/desc.h>
 #include <asm/pgtable.h>
 #include <asm/cacheflush.h>
+#include <asm/realmode.h>
 
-#include "realmode/wakeup.h"
+#include "../../realmode/rm/wakeup.h"
 #include "sleep.h"
 
 unsigned long acpi_realmode_flags;
@@ -36,13 +37,9 @@ asmlinkage void acpi_enter_s3(void)
  */
 int acpi_suspend_lowlevel(void)
 {
-	struct wakeup_header *header;
-	/* address in low memory of the wakeup routine. */
-	char *acpi_realmode;
+	struct wakeup_header *header =
+		(struct wakeup_header *) __va(real_mode_header->wakeup_header);
 
-	acpi_realmode = TRAMPOLINE_SYM(acpi_wakeup_code);
-
-	header = (struct wakeup_header *)(acpi_realmode + WAKEUP_HEADER_OFFSET);
 	if (header->signature != WAKEUP_HEADER_SIGNATURE) {
 		printk(KERN_ERR "wakeup header does not match\n");
 		return -EINVAL;
@@ -50,27 +47,6 @@ int acpi_suspend_lowlevel(void)
 
 	header->video_mode = saved_video_mode;
 
-	header->wakeup_jmp_seg = acpi_wakeup_address >> 4;
-
-	/*
-	 * Set up the wakeup GDT.  We set these up as Big Real Mode,
-	 * that is, with limits set to 4 GB.  At least the Lenovo
-	 * Thinkpad X61 is known to need this for the video BIOS
-	 * initialization quirk to work; this is likely to also
-	 * be the case for other laptops or integrated video devices.
-	 */
-
-	/* GDT[0]: GDT self-pointer */
-	header->wakeup_gdt[0] =
-		(u64)(sizeof(header->wakeup_gdt) - 1) +
-		((u64)__pa(&header->wakeup_gdt) << 16);
-	/* GDT[1]: big real mode-like code segment */
-	header->wakeup_gdt[1] =
-		GDT_ENTRY(0x809b, acpi_wakeup_address, 0xfffff);
-	/* GDT[2]: big real mode-like data segment */
-	header->wakeup_gdt[2] =
-		GDT_ENTRY(0x8093, acpi_wakeup_address, 0xfffff);
-
 #ifndef CONFIG_64BIT
 	store_gdt((struct desc_ptr *)&header->pmode_gdt);
 
@@ -95,7 +71,6 @@ int acpi_suspend_lowlevel(void)
 	header->pmode_cr3 = (u32)__pa(&initial_page_table);
 	saved_magic = 0x12345678;
 #else /* CONFIG_64BIT */
-	header->trampoline_segment = trampoline_address() >> 4;
 #ifdef CONFIG_SMP
 	stack_start = (unsigned long)temp_stack + sizeof(temp_stack);
 	early_gdt_descr.address =