From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1947740AbcBRUAt (ORCPT ); Thu, 18 Feb 2016 15:00:49 -0500 Received: from mail.skyhub.de ([78.46.96.112]:38630 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1946928AbcBRUAo (ORCPT ); Thu, 18 Feb 2016 15:00:44 -0500 From: Borislav Petkov To: X86 ML Cc: LKML , Andy Lutomirski , Boris Ostrovsky , "Luis R. Rodriguez" Subject: [PATCH] x86/ptdump: Remove paravirt_enabled() Date: Thu, 18 Feb 2016 21:00:41 +0100 Message-Id: <1455825641-19585-1-git-send-email-bp@alien8.de> X-Mailer: git-send-email 2.3.5 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Borislav Petkov 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 Cc: Andy Lutomirski Cc: Boris Ostrovsky Cc: "Luis R. Rodriguez" --- arch/x86/mm/dump_pagetables.c | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-) diff --git a/arch/x86/mm/dump_pagetables.c b/arch/x86/mm/dump_pagetables.c index 4a6f1d9b5106..99bfb192803f 100644 --- a/arch/x86/mm/dump_pagetables.c +++ b/arch/x86/mm/dump_pagetables.c @@ -358,20 +358,19 @@ static void walk_pud_level(struct seq_file *m, struct pg_state *st, pgd_t addr, #define pgd_none(a) pud_none(__pud(pgd_val(a))) #endif -#ifdef CONFIG_X86_64 static inline bool is_hypervisor_range(int idx) { +#ifdef CONFIG_X86_64 /* * ffff800000000000 - ffff87ffffffffff is reserved for * the hypervisor. */ - return paravirt_enabled() && - (idx >= pgd_index(__PAGE_OFFSET) - 16) && - (idx < pgd_index(__PAGE_OFFSET)); -} + return (idx >= pgd_index(__PAGE_OFFSET) - 16) && + (idx < pgd_index(__PAGE_OFFSET)); #else -static inline bool is_hypervisor_range(int idx) { return false; } + return false; #endif +} static void ptdump_walk_pgd_level_core(struct seq_file *m, pgd_t *pgd, bool checkwx) -- 2.3.5