Re: [PATCH 3/4] x86, efi: Add an efi= kernel command line parameter

Borislav Petkov
2013-06-06T21:02:18Z

On Thu, Jun 06, 2013 at 09:50:57PM +0100, Matthew Garrett wrote:
> What do you mean by "call them"? I don't think we ever want to call by
> physical address, other than maybe in the kexec case. The only reason
> we really care about the physical addresses being mapped 1:1 is that
> some pointers may not have been updated.

I want to be able to call the runtime services in the kexec kernel.
Which means, the kexec kernel would simply map the runtime code/data
regions 1:1 and then use the physical addresses to call the runtime
services.

Question is: would that work even if SetVirtualAddressMap has already
run in the original kernel and with virtual addresses?

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Regards/Gruss,
Boris.

Sent from a fat crate under my desk. Formatting is fine.
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