[Crash-utility] [PATCH v1] arm64: fix kernel memory map handling for kaslr-enabled

[AKASHI Takahiro]

On Tue, May 24, 2016 at 09:35:54AM -0400, Dave Anderson wrote:
> 
> 
> ----- Original Message -----
> > > > 
> > > > Now that PHYS_OFFSET is defined as "memstart_addr",  we can get the value
> > > > if we can access this symbol (on a live system).
> > > 
> > > When PHYS_OFFSET/memstart_addr is bumped up from the actual base of  physical
> > > memory, is the physical memory below it no longer used/accessible?
> > 
> > Yes, it is! That is what Ard has managed to do in his series of
> > KASLR-related patches.
> 
> How is it accessed via a kernel virtual address?  Or is only accessible when
> mapped into a vmalloc() or user-space address?

Through a linear(unity) mapping above PAGE_OFFSET.

-Takahiro AKASHI

> Dave
> 
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