Kirill A. Shutemov 34bbb0009f x86/boot/compressed: Enable 5-level paging during decompression stage ... We need to cover two basic cases: when bootloader left us in 32-bit mode and when bootloader enabled long mode. The patch implements unified codepath to enabled 5-level paging for both cases. It means case when we start in 32-bit mode, we first enable long mode with 4-level and then switch over to 5-level paging. Switching from 4-level to 5-level paging is not trivial. We cannot do it directly. Setting LA57 in long mode would trigger #GP. So we need to switch off long mode first and the then re-enable with 5-level paging. NOTE: The need of switching off long mode means we are in trouble if bootloader put us above 4G boundary. If bootloader wants to boot 5-level paging kernel, it has to put kernel below 4G or enable 5-level paging on it's own, so we could avoid the step. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-arch@vger.kernel.org Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/20170606113133.22974-7-kirill.shutemov@linux.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>		2017-06-13 08:56:53 +02:00
..
compressed	x86/boot/compressed: Enable 5-level paging during decompression stage	2017-06-13 08:56:53 +02:00
tools	x86/boot: Remove unused 'is_big_kernel' variable	2016-02-16 09:16:58 +01:00
.gitignore
a20.c
apm.c
bioscall.S
bitops.h	x86, asm: use bool for bitops and other assembly outputs	2016-06-08 12:41:20 -07:00
boot.h	x86/boot: Fix BSS corruption/overwrite bug in early x86 kernel startup	2017-04-20 10:05:23 +02:00
cmdline.c
code16gcc.h
copy.S
cpu.c	Revert "x86/boot: Fail the boot if !M486 and CPUID is missing"	2016-12-19 11:54:20 +01:00
cpucheck.c	x86/boot: Detect 5-level paging support	2017-04-04 08:22:33 +02:00
cpuflags.c	x86/boot: Detect 5-level paging support	2017-04-04 08:22:33 +02:00
cpuflags.h	x86/mm: Disallow running with 32-bit PTEs to work around erratum	2016-07-13 09:43:25 +02:00
ctype.h
early_serial_console.c	x86/boot: Add missing file header comments	2016-05-10 10:12:03 +02:00
edd.c
header.S	x86/boot/e820: Remove assembly guard from asm/e820/types.h	2017-01-28 09:31:15 +01:00
install.sh
main.c
Makefile	x86/boot/build: Remove always empty $(USERINCLUDE)	2016-11-07 07:30:01 +01:00
memory.c	x86/boot/e820: Separate the E820 ABI structures from the in-kernel structures	2017-01-29 13:39:32 +01:00
mkcpustr.c
mtools.conf.in
pm.c
pmjump.S
printf.c
regs.c
setup.ld
string.c	Merge branch 'linus' into x86/boot, to pick up fixes	2017-01-28 09:30:11 +01:00
string.h	x86/boot: Add missing declaration of string functions	2017-01-09 11:53:05 +01:00
tty.c
version.c
vesa.h
video-bios.c
video-mode.c
video-vesa.c
video-vga.c
video.c
video.h