Now we have limit kdump reserved under 896M, because kexec has the limitation.
and also bzImage need to stay under 4g.
kernel parts changes could be found at:
git://git.kernel.org/pub/scm/linux/kernel/git/yinghai/linux-yinghai.git for-x86-boot
here patches are for kexec tools to load bzImage and ramdisk above 4G
acccording to new added boot header fields.
-v3: address review from Eric to use locate_hole at first.
use xloadflags instead.
-v4: remove the restriction about bzImage not crossing GB boundary.
add real-mode fix for bzImage.
add --entry-32bit and --real-mode for skip bzImage64.
-v5: use USE_EXT_BOOT_PARAMS bit in xloadflags.
-v6: use sentinel instead of USE_EXT_BOOT_PARAMS.
add crashkernel_low support
-v7: Separate bootloader id setting in another patch
Yinghai Lu (7):
kexec, x86: add boot header member for version 2.12
kexec, x86: clean boot_params area for entry-32bit path
kexec, x86: Fix bzImage real-mode booting
kexec, x86: put ramdisk/cmd_line above 4G for 64bit bzImage
kexec, x86: set booloader id in setup_header
kexec, x86_64: Load bzImage64 above 4G
kexec, x86: handle Crash low kernel range
include/x86/x86-linux.h | 27 ++-
kexec/arch/i386/crashdump-x86.c | 21 +++
kexec/arch/i386/include/arch/options.h | 4 +-
kexec/arch/i386/kexec-bzImage.c | 79 ++++++--
kexec/arch/i386/x86-linux-setup.c | 27 ++-
kexec/arch/x86_64/Makefile | 1 +
kexec/arch/x86_64/kexec-bzImage64.c | 312 ++++++++++++++++++++++++++++++++
kexec/arch/x86_64/kexec-x86_64.c | 1 +
kexec/arch/x86_64/kexec-x86_64.h | 5 +
9 files changed, 453 insertions(+), 24 deletions(-)
create mode 100644 kexec/arch/x86_64/kexec-bzImage64.c
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1.7.10.4
