From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dave Martin Subject: Re: [PATCH v5 17/26] KVM: arm64: Reject ioctl access to FPSIMD V-regs on SVE vcpus Date: Tue, 26 Feb 2019 12:13:28 +0000 Message-ID: <20190226121328.GR3567@e103592.cambridge.arm.com> References: <1550519559-15915-1-git-send-email-Dave.Martin@arm.com> <1550519559-15915-18-git-send-email-Dave.Martin@arm.com> <696ae744-c016-9cc2-d393-fd321d341df4@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id CAC334A2E9 for ; Tue, 26 Feb 2019 07:13:34 -0500 (EST) Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 6-109D9--p6A for ; Tue, 26 Feb 2019 07:13:33 -0500 (EST) Received: from foss.arm.com (usa-sjc-mx-foss1.foss.arm.com [217.140.101.70]) by mm01.cs.columbia.edu (Postfix) with ESMTP id C619649E3E for ; Tue, 26 Feb 2019 07:13:33 -0500 (EST) Content-Disposition: inline In-Reply-To: <696ae744-c016-9cc2-d393-fd321d341df4@arm.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu To: Julien Thierry Cc: Okamoto Takayuki , Christoffer Dall , Ard Biesheuvel , Marc Zyngier , Catalin Marinas , Will Deacon , Zhang Lei , kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org List-Id: kvmarm@lists.cs.columbia.edu On Thu, Feb 21, 2019 at 12:06:23PM +0000, Julien Thierry wrote: > > > On 18/02/2019 19:52, Dave Martin wrote: > > In order to avoid the pointless complexity of maintaining two ioctl > > register access views of the same data, this patch blocks ioctl > > access to the FPSIMD V-registers on vcpus that support SVE. > > > > This will make it more straightforward to add SVE register access > > support. > > > > Since SVE is an opt-in feature for userspace, this will not affect > > existing users. > > > > Signed-off-by: Dave Martin > > Reviewed-by: Julien Thierry Thanks ---Dave 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 X-Spam-Level: X-Spam-Status: No, score=-5.5 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,USER_AGENT_MUTT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6671AC43381 for ; Tue, 26 Feb 2019 12:13:46 +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 36DA22173C for ; Tue, 26 Feb 2019 12:13:46 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="gVTHp1cP" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 36DA22173C Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=So2KnDeLaGzk3++Ggonj7E6ukwAP0+vHsIWHVd6tUkE=; b=gVTHp1cPFkGXhH cJkvheBuPeytArQPouaCqHjKhAj0vPmW9/1B505WgBpv+uk+T/O7DquBPcN8M1YlSkFIL7SLCbQMk UmbwgGLQAx3cQ8nJpYxhuF25TdGBa7zLkJabnto5W0X84kue135RL+AftMlND2MRTyW7K1GpiRrnM Evz633kex9uazfV6QGv8ly93QbGJW107DRgbKSV8tIu0ppsD/4wOjzahZuTUwnnL2V/n0LvAqMRrz 2Vtf/vw8K5rQxhl80pUziUfK8qF4/NGeo+ZTctOHhSbarUlWbD1eun7epMVNmodE9Dx5/j0HZApxa VKlD0lCDlHCmY0LC50WQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gybcF-0007ag-Qz; Tue, 26 Feb 2019 12:13:43 +0000 Received: from foss.arm.com ([217.140.101.70]) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gybc5-0007QE-Ep for linux-arm-kernel@lists.infradead.org; Tue, 26 Feb 2019 12:13:34 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 32C3680D; Tue, 26 Feb 2019 04:13:33 -0800 (PST) Received: from e103592.cambridge.arm.com (usa-sjc-imap-foss1.foss.arm.com [10.72.51.249]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 6597C3F5C1; Tue, 26 Feb 2019 04:13:31 -0800 (PST) Date: Tue, 26 Feb 2019 12:13:28 +0000 From: Dave Martin To: Julien Thierry Subject: Re: [PATCH v5 17/26] KVM: arm64: Reject ioctl access to FPSIMD V-regs on SVE vcpus Message-ID: <20190226121328.GR3567@e103592.cambridge.arm.com> References: <1550519559-15915-1-git-send-email-Dave.Martin@arm.com> <1550519559-15915-18-git-send-email-Dave.Martin@arm.com> <696ae744-c016-9cc2-d393-fd321d341df4@arm.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <696ae744-c016-9cc2-d393-fd321d341df4@arm.com> User-Agent: Mutt/1.5.23 (2014-03-12) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190226_041333_499268_91D49D2D X-CRM114-Status: GOOD ( 12.75 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Okamoto Takayuki , Christoffer Dall , Ard Biesheuvel , Marc Zyngier , Catalin Marinas , Will Deacon , Zhang Lei , kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, Feb 21, 2019 at 12:06:23PM +0000, Julien Thierry wrote: > > > On 18/02/2019 19:52, Dave Martin wrote: > > In order to avoid the pointless complexity of maintaining two ioctl > > register access views of the same data, this patch blocks ioctl > > access to the FPSIMD V-registers on vcpus that support SVE. > > > > This will make it more straightforward to add SVE register access > > support. > > > > Since SVE is an opt-in feature for userspace, this will not affect > > existing users. > > > > Signed-off-by: Dave Martin > > Reviewed-by: Julien Thierry Thanks ---Dave _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel