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=-15.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 2F376C433DB for ; Mon, 22 Mar 2021 11:26:59 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (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 C21966191F for ; Mon, 22 Mar 2021 11:26:58 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C21966191F Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+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=desiato.20200630; 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; bh=faPNy+1OlSFfBIWmpYQOV3PNRq2GMK1AbsUSswv+JRE=; b=m/XtflrtpKvOPMqWYVqXUepkh R33AAlpg7JYTkQko7Ys8S650OdCPacR0KDx5MCJWH3lB3oL6J9PUPvi9E7pJQKcAWcFT/78wmV7pp PX1DWGBN6qnuLrvotN+YorqdRiYk90YPDyzxOc07YArdWsDH/SQOQUm60Cnla4v+ZYx+40xRT4rXl /F/teFxtxjdsEguCzyQy7Ph5QO12Y5jf4h4fmSSJmiV5LLeilooHBHNX98a3ce6wC1BU3r5UIp9uz mMLa9ymhGaqGi0WueXGx62VHZ1ggmVS9dCOmW74/yyeniBa8qWS+JefUZ8DhYMOO1fuYfORaE1R14 6zogkx4Cg==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lOIgG-00BRbC-2R; Mon, 22 Mar 2021 11:25:08 +0000 Received: from mail.kernel.org ([198.145.29.99]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lOIg6-00BRYd-U6 for linux-arm-kernel@lists.infradead.org; Mon, 22 Mar 2021 11:25:00 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id 971096191F; Mon, 22 Mar 2021 11:24:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1616412295; bh=ZLi6Bd3+v6SEZ7BojqeGDRUBPIM44t1xQ82RsA0FR9E=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=X1/XGgKUEwjQp5cnpZHom0FOv2Wv5aaJYB7D+9Rw0EKC2/dvDBwEJcrxiYyR97pDU eYn/PT/+WCDlABZbe8MpPobHdtfpAF8TYkAGpcCR8OJweh0kThjbcjPdgqZ6+yp8C6 bafuJ8IHT1lZ6KsjCHAipLHctHG91NWEMOK8h3E/xmoUC2T8/t23/Ft5yM0t7K6xqQ w5HhDuSR+/J9+l+Cn/QyRCrEd5qWcl181B1HdL4IPUQExefVoxRsXpztnn9/sAgvRB c624LvFnWaco433jFHovHRbtT6LhTK8h7dp+zoHh6jnJnEt3YrnzRqMTAE+uTqgHJM 2/yrTOk8JW+ZQ== Date: Mon, 22 Mar 2021 11:24:49 +0000 From: Will Deacon To: Quentin Perret Cc: catalin.marinas@arm.com, maz@kernel.org, james.morse@arm.com, julien.thierry.kdev@gmail.com, suzuki.poulose@arm.com, android-kvm@google.com, seanjc@google.com, mate.toth-pal@arm.com, linux-kernel@vger.kernel.org, robh+dt@kernel.org, linux-arm-kernel@lists.infradead.org, kernel-team@android.com, kvmarm@lists.cs.columbia.edu, tabba@google.com, ardb@kernel.org, mark.rutland@arm.com, dbrazdil@google.com Subject: Re: [PATCH v6 13/38] KVM: arm64: Enable access to sanitized CPU features at EL2 Message-ID: <20210322112448.GA10318@willie-the-truck> References: <20210319100146.1149909-1-qperret@google.com> <20210319100146.1149909-14-qperret@google.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20210319100146.1149909-14-qperret@google.com> 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-20210322_112459_297497_77929DAA X-CRM114-Status: GOOD ( 13.08 ) 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 Fri, Mar 19, 2021 at 10:01:21AM +0000, Quentin Perret wrote: > Introduce the infrastructure in KVM enabling to copy CPU feature > registers into EL2-owned data-structures, to allow reading sanitised > values directly at EL2 in nVHE. > > Given that only a subset of these features are being read by the > hypervisor, the ones that need to be copied are to be listed under > together with the name of the nVHE variable that > will hold the copy. This introduces only the infrastructure enabling > this copy. The first users will follow shortly. > > Signed-off-by: Quentin Perret > --- > arch/arm64/include/asm/cpufeature.h | 1 + > arch/arm64/include/asm/kvm_cpufeature.h | 22 ++++++++++++++++++++++ > arch/arm64/include/asm/kvm_host.h | 4 ++++ > arch/arm64/kernel/cpufeature.c | 13 +++++++++++++ > arch/arm64/kvm/sys_regs.c | 19 +++++++++++++++++++ > 5 files changed, 59 insertions(+) > create mode 100644 arch/arm64/include/asm/kvm_cpufeature.h Acked-by: Will Deacon Will _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel