Originally posted by uid313
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It's Now Easier To Setup A Linux Payload For Coreboot
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Originally posted by DeepDayze View PostYes, in much the same fashion as DeviceVM's Splashtop does. This minimal Linux kernel could be equipped with diagnostic tools and such for handling hardware/boot issues for example. Also would be cool to have an instant-on music or movie player for using your laptop as a multimedia player without booting Windows or your favorite distro
Or could boot straight into a web browser.
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Originally posted by DeepDayze View PostYes, in much the same fashion as DeviceVM's Splashtop does. This minimal Linux kernel could be equipped with diagnostic tools and such for handling hardware/boot issues for example. Also would be cool to have an instant-on music or movie player for using your laptop as a multimedia player without booting Windows or your favorite distro
The other good place for direct loading would be secure systems to minimize the code you have to trust. Perhaps doubly useful with a micro-kernel where the core is well-reviewed and changes very slowly.
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Originally posted by uid313 View PostWith this you can boot a minimal Linux system (think no X) in like 1 second only.
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Originally posted by plonoma View PostPutting the Linux kernel on a rom BIOS chip is an exceptionally bad idea.
the option and associated mechanism to boot an arbitrary operating system being unnecessary in an embedded / clustered environment (the context the project was born in) where the os (or at least the kernel) is fixed
besides being possibly a point of failure, with the bios not exactly being the best when it comes to manageability (think of a headless cluster node stuck in a POST "select boot device" menu or in a "keyboard fail - press F1 to continue" error);
the bios' device probe and initialization feature becoming redundant with linux having, or in the process of getting, code to perform it natively instead of relying on external legacy (16 bit) code;
They made the pragmatic move to being a bootloader for normal, boot-media-installed, Os's - and changed name to CoreBoot - when it became evident that the market (boards and chip manufacturers) would not move to higher capacity bios chips (although for a while the decrease in flash memory cost suggested that chips sufficient for a small operating system, would become available)Last edited by silix; 01 September 2013, 09:31 AM.
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Originally posted by mrugiero View PostYes, but every kernel update (which for modern hardware specially, might bring interesting things) implies flashing the BIOS again. I don't know if there's any limit on how many times you can do that without side effects, but I'd expect that to exist. It's not usual to flash your BIOS once every two or three months, I don't think they are designed for such often updates.
Adding Linux as a payload (instead of loading Linux via SeaBIOS, GRUB2, FILO, or even Tianocore) is a rather special feature, used for uncommon situations like embedded systems. I guess the main value comes from using the Linux in flash as a loader for an on-disk version - Linux's kexec feature is just made for that. This allows developing the boot process (which may include updating the OS by various means, recovery, signature checking, ...) in a known, common, and time tested environment (read: the Linux userland) instead of whatever the bootloaders give you.
"Regular coreboot users" (to the degree that such people actually exist ;-) ) will probably be more happy with a payload whose modus operandi is supported by their main operating system (that is, SeaBIOS or Tianocore as a payload for common Linux, Windows, BSD, and so on) - after all the OS is what they _really_ want to use.
Disclosure: I'm the author of the new Linux-as-payload mechanism (and as a sidenote, the change is more than just a bunch of Kconfig variables; see the grandparent commit of the Kconfig change).
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Originally posted by varikonniemi View PostI have been amazed this is not the common way to boot your system. With an optimized firmware like coreboot and a slim Linux setup modern hardware can boot in just a couple of seconds. Fedora can load in under 3 seconds, so the most time of boot is spent in BIOS/UEFI/BOOTLOADER on modern systems.
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I have been amazed this is not the common way to boot your system. With an optimized firmware like coreboot and a slim Linux setup modern hardware can boot in just a couple of seconds. Fedora can load in under 3 seconds, so the most time of boot is spent in BIOS/UEFI/BOOTLOADER on modern systems.Last edited by varikonniemi; 01 September 2013, 03:59 AM.
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Boots fast
With this you can boot a minimal Linux system (think no X) in like 1 second only.
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Originally posted by plonoma View PostPutting the Linux kernel on a rom BIOS chip is an exceptionally bad idea.
Seems like the article might have a mistake, misunderstanding in it. They happen.
Originally posted by http://www.coreboot.org/Payloads#LinuxLinux
coreboot can use a Linux kernel as payload directly. That is, the kernel is included in the ROM chip where coreboot resides.
Alternatively, you can also boot a Linux kernel from your hard drive using either the FILO, GRUB2, or SeaBIOS payloads.
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