• Linus Torvalds's avatar
    Merge branch 'x86-trampoline-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 731a7378
    Linus Torvalds authored
    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 '61f54461': (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
      ...
    731a7378
head_64.S 11.4 KB