Messages in this thread | | | Date | Tue, 16 Jul 2013 12:36:09 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [PATCH v2 1/3] x86, boot: add mmio serial during compressed boot |
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On 07/16/2013 12:31 PM, Kees Cook wrote: > > Could the first step be documenting the limitation? I've found this > patch extremely useful for my case already, and I imagine there might > be other people that need the early mmio stuff to. Generally the > compressed boot serial console stuff is going to be used in the more > common non-kexec situations at least for a while. > > Does this patch create any _problems_? Right now, neither low nor >4G > kernel can use an mmio serial port. :) This this, we'd at least gain > it for the low case. >
Even documenting the limitation is likely to end up with a bunch of emails asking why their kernel crashed.
I think setting up a dynamic #PF handler is the right thing for the decompressor, we already did for the kernel proper.
-hpa
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