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Re: [Xen-devel] Is: kexec & EFI Was: Re: EFI GetNextVariableName crashes when running under Xen, but not under Linux. efi-rs=0 works. No memmap issues

On Fri, Jan 30, 2015 at 02:57:32PM +0000, David Vrabel wrote:
> On 30/01/15 14:52, Konrad Rzeszutek Wilk wrote:
> > On Fri, Jan 30, 2015 at 02:40:46PM +0000, David Vrabel wrote:
> >> On 30/01/15 14:17, Konrad Rzeszutek Wilk wrote:
> >>>
> >>> <blinks> kexec is OS agnostic?
> >>
> >> Yes.
> >>
> >> Extra information to be passed to (e.g., a Linux kernel being kexec'd)
> >> can be supplied in an additional segment and marshalled into a suitable
> >> format/location for the exec'd kernel by purgatory (or similar).
> >>
> >> There shouldn't be a need to extend the hypervisor ABI for this.
> >
> > How are you planning to make kexec work under EFI?
> I don't know at this time.

I suppose that we should provide additional kexec hypercall
function which will return info about RS. kexec-tools should
load new kernel as usual and add relevant argument to its
command line. Most things are in place so we should just
learn kexec-tools to do new things.


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