How to tell Linux where initramfs is in RAM
I'm trying to boot a Linux kernel running on top of Xen with a initramfs copied into RAM by the bootloader.
In the device tree I took out a chunk of memory so the kernel will not overwrite the area I copy the initramfs to.
memory {
device_type = "memory";
- reg = <0x0 0x0 0x0 0x80000000 0x8 0x0 0x0 0x80000000>;
+ reg = <0x0 0x0 0x0 0x60000000 0x8 0x0 0x0 0x80000000>;
};
When in uboot, I copy the initramfs to 0x60000000 and a fitimage with the dom0 kernel, device tree, and xen image to 0x8000000 then boot.
My bootargs for dom0 are
xen,dom0-bootargs = "console=hvc0 earlycon=xen earlyprintk=xen rootdelay=1 root=/dev/ram0 rw rd_start=0x60000000 rd_size=0x114a3000 clk_ignore_unused";
I got the rd_start and rd_size bootargs from here which was initially suggested from this StackExchange question.
I'm questioning if I'm using an incorrect initramfs (ext4) because in the stack trace of the kernel panic, mount_block_root() is called and fails. However, before the panic it prints
No filesystem could mount root, tried: ext3 ext4 ext2 cramfs vfat msdos btrfs
Because of the lack of documentation on this I'm questioning if I'm going in the right direction here or if I'm way off.
linux linux-kernel embedded initramfs
edited 2 hours ago
Rui F Ribeiro
40.3k1479137
asked 3 hours ago
jesse_partmanjesse_partman
61
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I'm trying to boot a Linux kernel running on top of Xen with a initramfs copied into RAM by the bootloader.
In the device tree I took out a chunk of memory so the kernel will not overwrite the area I copy the initramfs to.
memory {
device_type = "memory";
- reg = <0x0 0x0 0x0 0x80000000 0x8 0x0 0x0 0x80000000>;
+ reg = <0x0 0x0 0x0 0x60000000 0x8 0x0 0x0 0x80000000>;
};
When in uboot, I copy the initramfs to 0x60000000 and a fitimage with the dom0 kernel, device tree, and xen image to 0x8000000 then boot.
My bootargs for dom0 are
xen,dom0-bootargs = "console=hvc0 earlycon=xen earlyprintk=xen rootdelay=1 root=/dev/ram0 rw rd_start=0x60000000 rd_size=0x114a3000 clk_ignore_unused";
I got the rd_start and rd_size bootargs from here which was initially suggested from this StackExchange question.
I'm questioning if I'm using an incorrect initramfs (ext4) because in the stack trace of the kernel panic, mount_block_root() is called and fails. However, before the panic it prints
No filesystem could mount root, tried: ext3 ext4 ext2 cramfs vfat msdos btrfs
Because of the lack of documentation on this I'm questioning if I'm going in the right direction here or if I'm way off.
linux linux-kernel embedded initramfs
edited 2 hours ago
Rui F Ribeiro
40.3k1479137
asked 3 hours ago
jesse_partmanjesse_partman
61
New contributor
jesse_partman is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
I'm trying to boot a Linux kernel running on top of Xen with a initramfs copied into RAM by the bootloader.
In the device tree I took out a chunk of memory so the kernel will not overwrite the area I copy the initramfs to.
memory {
device_type = "memory";
- reg = <0x0 0x0 0x0 0x80000000 0x8 0x0 0x0 0x80000000>;
+ reg = <0x0 0x0 0x0 0x60000000 0x8 0x0 0x0 0x80000000>;
};
When in uboot, I copy the initramfs to 0x60000000 and a fitimage with the dom0 kernel, device tree, and xen image to 0x8000000 then boot.
My bootargs for dom0 are
xen,dom0-bootargs = "console=hvc0 earlycon=xen earlyprintk=xen rootdelay=1 root=/dev/ram0 rw rd_start=0x60000000 rd_size=0x114a3000 clk_ignore_unused";
I got the rd_start and rd_size bootargs from here which was initially suggested from this StackExchange question.
I'm questioning if I'm using an incorrect initramfs (ext4) because in the stack trace of the kernel panic, mount_block_root() is called and fails. However, before the panic it prints
No filesystem could mount root, tried: ext3 ext4 ext2 cramfs vfat msdos btrfs
Because of the lack of documentation on this I'm questioning if I'm going in the right direction here or if I'm way off.
linux linux-kernel embedded initramfs
edited 2 hours ago
Rui F Ribeiro
40.3k1479137
asked 3 hours ago
jesse_partmanjesse_partman
61
New contributor
jesse_partman is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I'm trying to boot a Linux kernel running on top of Xen with a initramfs copied into RAM by the bootloader.
In the device tree I took out a chunk of memory so the kernel will not overwrite the area I copy the initramfs to.
memory {
device_type = "memory";
- reg = <0x0 0x0 0x0 0x80000000 0x8 0x0 0x0 0x80000000>;
+ reg = <0x0 0x0 0x0 0x60000000 0x8 0x0 0x0 0x80000000>;
};
When in uboot, I copy the initramfs to 0x60000000 and a fitimage with the dom0 kernel, device tree, and xen image to 0x8000000 then boot.
My bootargs for dom0 are
xen,dom0-bootargs = "console=hvc0 earlycon=xen earlyprintk=xen rootdelay=1 root=/dev/ram0 rw rd_start=0x60000000 rd_size=0x114a3000 clk_ignore_unused";
I got the rd_start and rd_size bootargs from here which was initially suggested from this StackExchange question.
I'm questioning if I'm using an incorrect initramfs (ext4) because in the stack trace of the kernel panic, mount_block_root() is called and fails. However, before the panic it prints
No filesystem could mount root, tried: ext3 ext4 ext2 cramfs vfat msdos btrfs
Because of the lack of documentation on this I'm questioning if I'm going in the right direction here or if I'm way off.
linux linux-kernel embedded initramfs
linux linux-kernel embedded initramfs
edited 2 hours ago
Rui F Ribeiro
40.3k1479137
asked 3 hours ago
jesse_partmanjesse_partman
61
New contributor
jesse_partman is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 2 hours ago
Rui F Ribeiro
40.3k1479137
asked 3 hours ago
jesse_partmanjesse_partman
61
New contributor
jesse_partman is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 2 hours ago
Rui F Ribeiro
40.3k1479137
edited 2 hours ago
Rui F Ribeiro
40.3k1479137
edited 2 hours ago
Rui F Ribeiro
40.3k1479137
40.3k1479137
asked 3 hours ago
jesse_partmanjesse_partman
61
New contributor
jesse_partman is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 3 hours ago
jesse_partmanjesse_partman
61
asked 3 hours ago
jesse_partmanjesse_partman
61
61
New contributor
jesse_partman is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
jesse_partman is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
jesse_partman is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
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