On Wed, Aug 28, 2013 at 10:26 PM, Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> wrote: > Hi all, > > I've been messing with UEFI booting a kernel and then later on, using > kexec to boot another kernel, and noticed that the kexec'ed kernel is > not really in EFI mode, although the EFI framebuffer seems present and > able to be used. > > Is this to be expected? I'd think that the EFI framebuffer wouldn't be > around anymore. Odds are this is a BIOS bug, given that the machine I'm > using is a really old UEFI mode (i.e. before secure boot mode ever > showed up), but should it work this way? AFAIK, it's to be expected at this point. kexec doesn't work as it should with UEFI. I believe Matthew and/or Matt can elaborate further, but it has to do with only being able to call ExitBootServices once and providing mappings to the UEFI Runtime services functions. > And, to get kexec to run the kernel in EFI mode, would require kexec to > treat the kernel as a EFI binary and run it that way, instead of the > "normal" way it currently is, right? I think so. josh -- To unsubscribe from this list: send the line "unsubscribe linux-efi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
