Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759219AbZJNTa6 (ORCPT ); Wed, 14 Oct 2009 15:30:58 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1759174AbZJNTa5 (ORCPT ); Wed, 14 Oct 2009 15:30:57 -0400 Received: from claw.goop.org ([74.207.240.146]:55340 "EHLO claw.goop.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759096AbZJNT36 (ORCPT ); Wed, 14 Oct 2009 15:29:58 -0400 From: Jeremy Fitzhardinge To: Linux Kernel Mailing List Cc: Xen-devel , kurt.hackel@oracle.com, Glauber de Oliveira Costa , Avi Kivity , the arch/x86 maintainers , Chris Mason , Jeremy Fitzhardinge Subject: [PATCH 11/12] x86/fixmap: add a predicate for usermode fixmaps Date: Wed, 14 Oct 2009 12:28:35 -0700 Message-Id: <1255548516-15260-12-git-send-email-jeremy.fitzhardinge@citrix.com> X-Mailer: git-send-email 1.6.2.5 In-Reply-To: <1255548516-15260-1-git-send-email-jeremy.fitzhardinge@citrix.com> References: <1255548516-15260-1-git-send-email-jeremy.fitzhardinge@citrix.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1326 Lines: 45 Some set of fixmaps are intented to be mapped into usermode. Add a predicate to test for those fixmaps. Signed-off-by: Jeremy Fitzhardinge --- arch/x86/include/asm/fixmap.h | 18 ++++++++++++++++++ 1 files changed, 18 insertions(+), 0 deletions(-) diff --git a/arch/x86/include/asm/fixmap.h b/arch/x86/include/asm/fixmap.h index b15c865..026ee10 100644 --- a/arch/x86/include/asm/fixmap.h +++ b/arch/x86/include/asm/fixmap.h @@ -183,6 +183,24 @@ static inline void __set_fixmap(enum fixed_addresses idx, extern void __this_fixmap_does_not_exist(void); +static inline bool user_fixmap(enum fixed_addresses fixmap) +{ + switch (fixmap) { +#ifdef CONFIG_X86_32 + case FIX_HOLE ... FIX_VDSO: +#else + case VSYSCALL_LAST_PAGE ... VSYSCALL_HPET: +#ifdef CONFIG_PARAVIRT_CLOCK_VSYSCALL + case FIX_PVCLOCK_TIME_INFO: +#endif +#endif + return true; + + default: + return false; + } +} + /* * 'index to address' translation. If anyone tries to use the idx * directly without translation, we catch the bug with a NULL-deference -- 1.6.2.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/