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=-10.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,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 118BFC433DB for ; Tue, 23 Mar 2021 09:46:23 +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 98A7B619BD for ; Tue, 23 Mar 2021 09:46:22 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 98A7B619BD Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com 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-Type: Content-Transfer-Encoding:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:Date:Message-ID:From: References:Cc:To:Subject:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=bkPILw3kCjwoGZNVc92pAmYL1v9qXFt+f4dgrBQykt8=; b=iN2jUcRMGpKfj03gS0RTaoO4y +Ygc/4VY4hFuxmWEsgwVENLzUzTiBCIuqPlCrlhAVLbAwxaxqfJSahrPwjI4B+wJXNjWellRXuzxQ UUoOYAxmfMrnF59xvRspkvJxuMRLUiHHutC+s48jIw4hX5eF7br+dkj2VC1G8RXLTLt+1q+kxiS1e 1zPBbk2gPh60km/0eTD4M+Cvmq1pjDhYKQdAxbTSPbOAP78dpR4vsmdqkKp8XEBKtPiFAIa5KnB2l vPaAsOg6os1L5itwaKZyS9L3yPgb5uZqagKAo4G0K3dol3kI2lp+EPCxzTSwtOWeEHvLTxSg0YM3Y iR5HypR0w==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lOdal-00EVEw-Us; Tue, 23 Mar 2021 09:44:52 +0000 Received: from foss.arm.com ([217.140.110.172]) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lOdag-00EVDm-PO for linux-arm-kernel@lists.infradead.org; Tue, 23 Mar 2021 09:44:48 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 632F31042; Tue, 23 Mar 2021 02:44:44 -0700 (PDT) Received: from [10.57.55.187] (unknown [10.57.55.187]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id DCB8E3F718; Tue, 23 Mar 2021 02:44:42 -0700 (PDT) Subject: Re: [PATCH v4 05/19] kvm: arm64: Disable guest access to trace filter controls To: Marc Zyngier Cc: linux-kernel@vger.kernel.org, mathieu.poirier@linaro.org, mike.leach@linaro.org, anshuman.khandual@arm.com, leo.yan@linaro.org, Will Deacon , Mark Rutland , Catalin Marinas , linux-arm-kernel@lists.infradead.org References: <20210225193543.2920532-1-suzuki.poulose@arm.com> <20210225193543.2920532-6-suzuki.poulose@arm.com> <8cb6eced29d9749d88af6f6d2f649019@kernel.org> From: Suzuki K Poulose Message-ID: <59682421-a985-ec71-3ade-09c17aa58b5a@arm.com> Date: Tue, 23 Mar 2021 09:44:41 +0000 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.16; rv:78.0) Gecko/20100101 Thunderbird/78.8.1 MIME-Version: 1.0 In-Reply-To: <8cb6eced29d9749d88af6f6d2f649019@kernel.org> Content-Language: en-GB X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210323_094447_181384_1251AFE6 X-CRM114-Status: GOOD ( 12.33 ) 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-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 23/03/2021 09:16, Marc Zyngier wrote: > Hi Suzuki, > > On 2021-03-22 22:24, Suzuki K Poulose wrote: >> Hi Marc, >> >> On 25/02/2021 19:35, Suzuki K Poulose wrote: >>> Disable guest access to the Trace Filter control registers. >>> We do not advertise the Trace filter feature to the guest >>> (ID_AA64DFR0_EL1: TRACE_FILT is cleared) already, but the guest >>> can still access the TRFCR_EL1 unless we trap it. >>> >>> This will also make sure that the guest cannot fiddle with >>> the filtering controls set by a nvhe host. >>> >>> Cc: Marc Zyngier >>> Cc: Will Deacon >>> Cc: Mark Rutland >>> Cc: Catalin Marinas >>> Signed-off-by: Suzuki K Poulose >> >> We have already have the v8.4 self hosted tracing support in 5.12-rcX. >> Do you think you can pick this up for this 5.12 ? > > Sure, no problem. Shall I pick patch #3 at the same time? Yes please. Thanks ! Suzuki _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel