Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751255AbbGIJnA (ORCPT ); Thu, 9 Jul 2015 05:43:00 -0400 Received: from foss.arm.com ([217.140.101.70]:45108 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750805AbbGIJm5 (ORCPT ); Thu, 9 Jul 2015 05:42:57 -0400 Date: Thu, 9 Jul 2015 10:42:30 +0100 From: Mark Rutland To: Marc Zyngier Cc: Catalin Marinas , Will Deacon , Christoffer Dall , "kvmarm@lists.cs.columbia.edu" , "linux-kernel@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , "kvm@vger.kernel.org" Subject: Re: [PATCH 01/13] arm/arm64: Add new is_kernel_in_hyp_mode predicate Message-ID: <20150709094230.GA20105@leverpostej> References: <1436372356-30410-1-git-send-email-marc.zyngier@arm.com> <1436372356-30410-2-git-send-email-marc.zyngier@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1436372356-30410-2-git-send-email-marc.zyngier@arm.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 559 Lines: 23 Hi, > +static inline bool is_kernel_in_hyp_mode(void) > +{ > + u64 el; > + > + asm("mrs %0, CurrentEL" : "=r" (el)); > + return el == CurrentEL_EL2; > +} If you can include cputype.h, I think this can be: static inline bool is_kernel_in_hyp_mode(void) { return read_cpuid(CurrentEL) == CurrentEL_EL2; } Mark. -- 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/