linux-kernel - Re: [PATCH 2/4] efi: Dump the EFI page table

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 14 Jan 2014 09:36:51 +0800
From:	Dave Young <dyoung@...hat.com>
To:	Matt Fleming <matt@...sole-pimps.org>
Cc:	Borislav Petkov <bp@...en8.de>,
	Linux EFI <linux-efi@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Borislav Petkov <bp@...e.de>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	"H. Peter Anvin" <hpa@...or.com>, Toshi Kani <toshi.kani@...com>
Subject: Re: [PATCH 2/4] efi: Dump the EFI page table

On 01/13/14 at 04:00pm, Matt Fleming wrote:
> On Sat, 11 Jan, at 09:49:28PM, Borislav Petkov wrote:
> > From: Borislav Petkov <bp@...e.de>
> > 
> > This is very useful for debugging issues with the recently added
> > pagetable switching code for EFI virtual mode.
> > 
> > Signed-off-by: Borislav Petkov <bp@...e.de>
> > ---
> >  arch/x86/platform/efi/efi.c | 11 +++++++++++
> >  1 file changed, 11 insertions(+)
> > 
> > diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c
> > index d62ec87a2b26..c34be4ce94c9 100644
> > --- a/arch/x86/platform/efi/efi.c
> > +++ b/arch/x86/platform/efi/efi.c
> > @@ -54,6 +54,7 @@
> >  #include <asm/rtc.h>
> >  
> >  #define EFI_DEBUG
> > +#undef EFI_PGT_DBG
> 
> Should this be a Kconfig option? Hacking source files to enable debug
> isn't the best idea. Plus you could make it depend on X86_PTDUMP.

I have same feeling, either a new Kconfig option or just print it while
ptdump_to_dmesg is true by default without extra Kconfig.

Thanks
Dave
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/