linux-kernel - Re: PROBLEM: Resume form hibernate broken by setting NX on gap

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Message-ID: <2733358.ov5sOzsSmy@vostro.rjw.lan>
Date:	Sat, 11 Jun 2016 00:33:31 +0200
From:	"Rafael J. Wysocki" <rjw@...ysocki.net>
To:	Logan Gunthorpe <logang@...tatee.com>
Cc:	Kees Cook <keescook@...omium.org>,
	"Rafael J. Wysocki" <rafael@...nel.org>,
	Stephen Smalley <sds@...ho.nsa.gov>,
	Ingo Molnar <mingo@...nel.org>, Ingo Molnar <mingo@...hat.com>,
	the arch/x86 maintainers <x86@...nel.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andy Lutomirski <luto@...nel.org>,
	Borislav Petkov <bp@...en8.de>,
	Denys Vlasenko <dvlasenk@...hat.com>,
	Brian Gerst <brgerst@...il.com>
Subject: Re: PROBLEM: Resume form hibernate broken by setting NX on gap

On Friday, June 10, 2016 04:28:01 PM Logan Gunthorpe wrote:
> 
> On 10/06/16 04:29 PM, Rafael J. Wysocki wrote:
> > OK, I have a theory, but I need a bit of help.
> > 
> > This may be a dumb question, but I don't quite remember the answer readily.
> > 
> > Given a physical address, how do I get the corresponding virtual one under
> > the kernel identity mapping?
> 
> Is that not just 'phys_to_virt(x)'??

Ah that.  Thanks!

Rafael