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Allow bzImages smaller than 32KiB to be kexec'ed.
The current code will fail to load a bzImage smaller than 32768 bytes (sizeof
struct x86_linux_header), but the 'memdisk' program that comes with syslinux is
only about 26 KiB. This patch changes the minimum size to 1024 bytes (2
sectors), which appears to be the limit that syslinux enforces.
Removed the "tail" field of struct x86_linux_header because it doesn't seem to
actually be used (is there a reason for it?).
Also, note that bzImage_probe() was incorrectly using `sizeof (header)', even
though header is a pointer.
Signed-off-by: Eric Biggers <ebiggers3@gmail.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
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This patch implements EDD support. The information is read from
/sys/firmware/edd (the edd driver must be loaded for this) and is written into
the zero page of the 32 bit boot protocol.
I successfully tested the patch on a x86_64 machine with the x86_64 kernel.
This fixes a hardware detection problem, discovered in
https://bugzilla.novell.com/show_bug.cgi?id=383210.
The last patch that updates the E820MAX constant is required to use that patch.
Signed-off-by: Bernhard Walle <bwalle@suse.de>
Signed-off-by: Simon Horman <horms@verge.net.au>
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This patch updates the boot protocol to match with the kernel. See
Documentation/i386/zero-page.txt in kernel.
The number of E820 map entries have been increased from 32 to 128. The update
is necessary for the next patch that implements EDD support for kexec.
when using the default 32 bit mode.
Signed-off-by: Bernhard Walle <bwalle@suse.de>
Signed-off-by: Simon Horman <horms@verge.net.au>
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The "Kexec command line length" command line patch introduced some
trailing whitespace in include/x86/x86-linux.h. This removes that
and others that I found along the way.
Signed-off-by: Simon Horman <horms@verge.net.au>
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Fine, New patch attached.
This patch does 5 things:
1) moves command line out of the zero page (struct bootparam)
2) extends command line length to support 2K command lines
3) adds a check to ensure that command line length is reasonably sized for new
boot protocols
4) adds a check to ensure that command line length is reasonably sized for old
boot protocols
5) imports variables from latest struct setup_header in kernel bootparams.h
Incorporates simplified version checking for boot protocol and conservatively
warns if the kernels boot protocol is below version 2.06 which is guaranteed to
have 2K commandlines (even though some arches may have that support in
older boot protocols)
Neil
Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
include/x86/x86-linux.h | 20 ++++++++++++++------
kexec/arch/i386/kexec-bzImage.c | 11 +++++++++++
kexec/arch/i386/x86-linux-setup.c | 3 ++-
3 files changed, 27 insertions(+), 7 deletions(-)
Signed-off-by: Simon Horman <horms@verge.net.au>
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o Modify bzImage loader to be able to recognize a relocatable bzImage and
load it. Now bzImage loader can identify that bzImage is relocatable and
can load the protected mode kernel code at a non 1MB addr.
Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
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- Initial import into git
- initial nbi image formage support
- ppc32 initial register setting fixes.
- gzipped multiboot file support
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