From mboxrd@z Thu Jan 1 00:00:00 1970 From: Borislav Petkov Subject: Re: [PATCH -v2] EFI: Runtime services virtual mapping Date: Sun, 22 Sep 2013 18:38:01 +0200 Message-ID: <20130922163801.GD28718@pd.tnic> References: <1379602494-26684-1-git-send-email-bp@alien8.de> <1379602494-26684-12-git-send-email-bp@alien8.de> <20130921113929.GB1587@pd.tnic> <20130922123515.GA7476@dhcp-16-126.nay.redhat.com> <20130922133722.GC28718@pd.tnic> <1ba7eca6-419c-4181-9927-9ba0927a6abf@email.android.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Return-path: Content-Disposition: inline In-Reply-To: <1ba7eca6-419c-4181-9927-9ba0927a6abf-2ueSQiBKiTY7tOexoI0I+QC/G2K4zDHf@public.gmane.org> Sender: linux-efi-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: "H. Peter Anvin" Cc: Dave Young , X86 ML , LKML , Borislav Petkov , Matt Fleming , Matthew Garrett , James Bottomley , Vivek Goyal , linux-efi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-efi@vger.kernel.org On Sun, Sep 22, 2013 at 08:27:34AM -0700, H. Peter Anvin wrote:a > The address that faults is interesting in that it is indeed just below > -4G. The question at hand is probably what information you are using > to build the EFI mappings in the secondary kernel and what could make > it not match the primary. Yep, so obviously we're not building the pagetable in the second kernel the same way as the first or we're missing some pieces. Btw, for debugging situations like this one, one could use arch/x86/mm/dump_pagetables.c successfully by sticking in the right CR3 value into *start. :-) -- Regards/Gruss, Boris. Sent from a fat crate under my desk. Formatting is fine. --