From mboxrd@z Thu Jan 1 00:00:00 1970 From: Will Deacon Subject: Re: [PATCH v4 05/23] arm64: Add ARM64_HAS_VIRT_HOST_EXTN feature Date: Mon, 15 Feb 2016 16:10:46 +0000 Message-ID: <20160215161045.GH6298@arm.com> References: <1455216004-19499-1-git-send-email-marc.zyngier@arm.com> <1455216004-19499-6-git-send-email-marc.zyngier@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Catalin Marinas , Mark Rutland , Christoffer Dall , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu To: Marc Zyngier Return-path: Received: from foss.arm.com ([217.140.101.70]:46207 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751187AbcBOQKl (ORCPT ); Mon, 15 Feb 2016 11:10:41 -0500 Content-Disposition: inline In-Reply-To: <1455216004-19499-6-git-send-email-marc.zyngier@arm.com> Sender: kvm-owner@vger.kernel.org List-ID: On Thu, Feb 11, 2016 at 06:39:46PM +0000, Marc Zyngier wrote: > Add a new ARM64_HAS_VIRT_HOST_EXTN features to indicate that the > CPU has the ARMv8.1 VHE capability. > > This will be used to trigger kernel patching in KVM. > > Acked-by: Christoffer Dall > Acked-by: Catalin Marinas > Signed-off-by: Marc Zyngier > --- > arch/arm64/include/asm/cpufeature.h | 3 ++- > arch/arm64/kernel/cpufeature.c | 11 +++++++++++ > 2 files changed, 13 insertions(+), 1 deletion(-) > > diff --git a/arch/arm64/include/asm/cpufeature.h b/arch/arm64/include/asm/cpufeature.h > index 8f271b8..c705d6a 100644 > --- a/arch/arm64/include/asm/cpufeature.h > +++ b/arch/arm64/include/asm/cpufeature.h > @@ -30,8 +30,9 @@ > #define ARM64_HAS_LSE_ATOMICS 5 > #define ARM64_WORKAROUND_CAVIUM_23154 6 > #define ARM64_WORKAROUND_834220 7 > +#define ARM64_HAS_VIRT_HOST_EXTN 8 > > -#define ARM64_NCAPS 8 > +#define ARM64_NCAPS 9 Just a heads up, but this conflicts with the for-next/core branch, where I used cap 8 to identify the absence of a h/w prefetcher. Will