Messages in this thread | | | Date | Thu, 7 Aug 2014 09:28:47 +0800 | From | Dave Young <> | Subject | Re: [PATCH 1/2] UEFI arm64: add noefi boot param |
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On 08/06/14 at 02:40pm, Ard Biesheuvel wrote: > On 6 August 2014 10:38, Dave Young <dyoung@redhat.com> wrote: > > > > Adding a noefi boot param like in X86 to disable efi runtime services support. > > > > This will be useful for debugging uefi problems. Also it will be useful > > for later kexec/kdump work. Kexec on uefi support in X86 depends on a fixed vm > > area specific for uefi runtime 1:1 mapping, kernel will switch to a different > > page table for any uefi runtime callback in virtual mode. In arm64 similar > > work probably is necessary. But kexec boot will just works with 'noefi' with > > the limitaion of lacking runtime services. The runtime services is not critical > > for kdump kernel for now. So as for kexec/kdump just leave the 1:1 mapping a > > future work. > > > > Can we find a better name? You will still be using the UEFI memory map > rather than the DT memory nodes (which will have been deleted by the > stub), and things like SMBIOS and ACPI that hinge off UEFI remain > enabled as well. > Hi, Ard
Leif suggested efi=noruntime, I think that will be better to you?
Thanks for review. Dave
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