From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 83ECDC433EF for ; Mon, 11 Oct 2021 10:58:17 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 403E2603E9 for ; Mon, 11 Oct 2021 10:58:17 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 403E2603E9 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; 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h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=Nzff+TeJVtKL5bG99c/4gakkFVrBi4fyyb1UDTPufBMS7ts3ifHfAzDqx9fKBOTBJ rPJ+p1Ohpf6SiCaC/V2xeqysamtwpAhf6V6Z/jgCBlrt3o5jLr+52KmWzzVZG539sX DuTElPR5ZyD+f6CWufUAVZQ93zAGA02mCH8+WxqKlR7xmkYp03/EK95NqYNQeIuYvZ WjytS8d+9Ogl2aITINBL2p0dClWVV9d8PUpCiQfI2LK1XQoyVmSrAjTn/H66s3i8c6 XxXs6B5ocnx+TN+BqAWilrBzWaXv5RWhfHKTzHgdWTsjk1f9obRj6WpU5U0Q53cSqw ESe5RAOWnPHmw== Date: Mon, 11 Oct 2021 11:56:30 +0100 From: Will Deacon To: Marc Zyngier Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Mark Rutland , Daniel Lezcano , Thomas Gleixner , Peter Shier , Raghavendra Rao Ananta , Ricardo Koller , Oliver Upton , Catalin Marinas , Linus Walleij , kernel-team@android.com Subject: Re: [PATCH v3 14/17] arm64: Add a capability for FEAT_ECV Message-ID: <20211011105629.GB4009@willie-the-truck> References: <20211010114306.2910453-1-maz@kernel.org> <20211010114306.2910453-15-maz@kernel.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20211010114306.2910453-15-maz@kernel.org> User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211011_035638_482529_7C30BB56 X-CRM114-Status: GOOD ( 16.21 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Sun, Oct 10, 2021 at 12:43:03PM +0100, Marc Zyngier wrote: > Add a new capability to detect the Enhanced Counter Virtualization > feature (FEAT_ECV). > > Reviewed-by: Oliver Upton > Signed-off-by: Marc Zyngier > --- > arch/arm64/kernel/cpufeature.c | 10 ++++++++++ > arch/arm64/tools/cpucaps | 1 + > 2 files changed, 11 insertions(+) > > diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c > index f8a3067d10c6..26b11ce8fff6 100644 > --- a/arch/arm64/kernel/cpufeature.c > +++ b/arch/arm64/kernel/cpufeature.c > @@ -1926,6 +1926,16 @@ static const struct arm64_cpu_capabilities arm64_features[] = { > .sign = FTR_UNSIGNED, > .min_field_value = 1, > }, > + { > + .desc = "Enhanced Counter Virtualization", > + .capability = ARM64_HAS_ECV, > + .type = ARM64_CPUCAP_SYSTEM_FEATURE, > + .matches = has_cpuid_feature, > + .sys_reg = SYS_ID_AA64MMFR0_EL1, > + .field_pos = ID_AA64MMFR0_ECV_SHIFT, > + .sign = FTR_UNSIGNED, > + .min_field_value = 1, > + }, > #ifdef CONFIG_ARM64_PAN > { > .desc = "Privileged Access Never", > diff --git a/arch/arm64/tools/cpucaps b/arch/arm64/tools/cpucaps > index 49305c2e6dfd..7a7c58acd8f0 100644 > --- a/arch/arm64/tools/cpucaps > +++ b/arch/arm64/tools/cpucaps > @@ -18,6 +18,7 @@ HAS_CRC32 > HAS_DCPODP > HAS_DCPOP > HAS_E0PD > +HAS_ECV > HAS_EPAN > HAS_GENERIC_AUTH > HAS_GENERIC_AUTH_ARCH We should also make the ECV field FTR_VISIBLE. Will _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel