linux-kernel - Re: [PATCH] x86/ptdump: Remove paravirt

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]

Message-ID: <56C6383F.9010405@oracle.com>
Date:	Thu, 18 Feb 2016 16:31:43 -0500
From:	Boris Ostrovsky <boris.ostrovsky@...cle.com>
To:	Borislav Petkov <bp@...en8.de>, X86 ML <x86@...nel.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Andy Lutomirski <luto@...capital.net>,
	"Luis R. Rodriguez" <mcgrof@...nel.org>
Subject: Re: [PATCH] x86/ptdump: Remove paravirt_enabled()



On 02/18/2016 03:00 PM, Borislav Petkov wrote:
> From: Borislav Petkov <bp@...e.de>
>
> is_hypervisor_range() can simply check if the PGD index is
> within ffff800000000000 - ffff87ffffffffff which is the range
> reserved for a hypervisor. That range is practically an ABI, see
> Documentation/x86/x86_64/mm.txt.
>
> Signed-off-by: Borislav Petkov <bp@...e.de>
> Cc: Andy Lutomirski <luto@...capital.net>
> Cc: Boris Ostrovsky <boris.ostrovsky@...cle.com>
> Cc: "Luis R. Rodriguez" <mcgrof@...nel.org>

Under Xen, as PV guest:

Tested-by: Boris Ostrovsky <boris.ostrovsky@...cle.com>