| Age | Commit message (Collapse) | Author |
|---|
|
Under loongson platform, use command:
kexec -l vmlinux... --append="root=UUID=28e1..." --initrd=...
kexec -e
quick restart failed like this:
********************************************************************
[ 3.420791] VFS: Cannot open root device "UUID=6462a8a4-02fb-49..."
[ 3.431262] Please append a correct "root=" boot option; ...
...
...
...
[ 3.543175] 0801 4194304 sda1 554e69cc-01
[ 3.543175]
[ 3.549494] 0802 62914560 sda2 554e69cc-02
[ 3.549495]
[ 3.555818] 0803 8388608 sda3 554e69cc-03
[ 3.555819]
[ 3.562139] 0804 174553229 sda4 554e69cc-04
[ 3.562139]
[ 3.568463] 0b00 1048575 sr0
[ 3.568464] driver: sr
[ 3.574524] Kernel panic - not syncing: VFS: Unable to mount root fs...
[ 3.582750] ---[ end Kernel panic - not syncing: VFS:...
*******************************************************************
The kernel cannot parse the UUID, the UUID is parsed in the initrd.
For compatibility with previous platforms, loongson platform obtain
initrd parameter through cmdline in kernel, the kernel supports use
cmdline to parse initrd. But under the mips architecture, kexec-tools
pass the initrd through DTB.
Made the following modifications:
(1) in kexec/arch/mips/kexec-elf-mips.c
Add patch_initrd_info(), at runtime to distinguish different cpu,
only for loongson cpu, add initrd parameter to cmdline.
(2) in kexec/arch/mips/crashdump-mips.c
Because loongson uses a different page_offset, it should be modified
to ensure that crashdump functionality is correct and reliable.
(3) in kexec/arch/mips/crashdump-mips.h
Added platform-specific page_offset macro definition.
Signed-off-by: Hui Li <lihui@loongson.cn>
Signed-off-by: Simon Horman <horms@kernel.org>
|
|
The 64-bit MIPS architecture doesn't have the same 2G limit the 32-bit
version has. Set MAXMEM and lowmem_limit to 0 for 64-bit MIPS so that
memory above 2G is usable in the kdump core files.
Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
|
|
- using simple mips* ) in configure.ac to make it compilable on mips2
and mips64
- remove kexec/arch/mips/mips-setup-simple.S which prepares cmdline for
new kernel, it is better to move this work to kernel code. BTW this code was
compilable only on o32 because of t4 is not defined on 64-64 or n32 MIPS ABIs.
- simple put cmdline as string, kernel code should catch cmdline like this
int board_kexec_prepare(struct kimage *image)
{
int i;
char *bootloader = "kexec";
board_boot_desc_ptr->argc = 0;
for(i=0;i<image->nr_segments;i++)
{
printk("segment %d
if (!strncmp(bootloader, (char*)image->segment[i].buf,
strlen(bootloader)))
{
/*
* convert command line string to array
* of parameters (as bootloader does).
*/
int argc = 0, offt;
char *str = (char *)image->segment[i].buf;
char *ptr = strchr(str, ' ');
while (ptr && (ARGV_MAX_ARGS > argc)) {
*ptr = '\0';
if (ptr[1] != ' ') {
offt = (int)(ptr - str + 1);
boot_desc_ptr->argv[argc] =
image->segment[i].mem + offt;
argc++;
}
ptr = strchr(ptr + 1, ' ');
}
boot_desc_ptr->argc = argc;
break;
}
}
Keep it as string make code simple and more readable.
- add crashdump support
- do not redefine syscalls numbers if they defined in system
remove fixups for /proc/iomem. If your board provides wrong /proc/iomem please
fix kernel, or at least you local version of kexec. No need to support it in
main line. At least add option --fake-iomem
- some minor fixes
Signed-off-by: Maxim Uvarov <muvarov@gmail.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
|
